diff options
106 files changed, 6827 insertions, 2903 deletions
diff --git a/mysql-test/include/index_merge2.inc b/mysql-test/include/index_merge2.inc index 32a176630ad..a6a7a4b2ae1 100644 --- a/mysql-test/include/index_merge2.inc +++ b/mysql-test/include/index_merge2.inc @@ -123,6 +123,7 @@ analyze table t1; select count(*) from t1; --replace_column 9 REF +--replace_result i2,i1 i1,i2 explain select count(*) from t1 where key1a = 2 and key1b is null and key2a = 2 and key2b is null; @@ -130,6 +131,7 @@ select count(*) from t1 where key1a = 2 and key1b is null and key2a = 2 and key2b is null; --replace_column 9 REF +--replace_result i3,i1 i1,i3 explain select count(*) from t1 where key1a = 2 and key1b is null and key3a = 2 and key3b is null; diff --git a/mysql-test/r/archive_gis.result b/mysql-test/r/archive_gis.result index 178c5716911..af231ad6ce4 100644 --- a/mysql-test/r/archive_gis.result +++ b/mysql-test/r/archive_gis.result @@ -403,7 +403,7 @@ Intersects(g1.g, g2.g) as i, Crosses(g1.g, g2.g) as r FROM gis_geometrycollection g1, gis_geometrycollection g2 ORDER BY first, second; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE g1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort -1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`g1`.`fid` AS `first`,`test`.`g2`.`fid` AS `second`,within(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `w`,contains(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `c`,overlaps(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `o`,equals(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `e`,disjoint(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `d`,touches(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `t`,intersects(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `i`,crosses(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `r` from `test`.`gis_geometrycollection` `g1` join `test`.`gis_geometrycollection` `g2` order by `test`.`g1`.`fid`,`test`.`g2`.`fid` DROP TABLE gis_point, gis_line, gis_polygon, gis_multi_point, gis_multi_line, gis_multi_polygon, gis_geometrycollection, gis_geometry; diff --git a/mysql-test/r/compress.result b/mysql-test/r/compress.result index 287691448bb..4c1c49bf3e0 100644 --- a/mysql-test/r/compress.result +++ b/mysql-test/r/compress.result @@ -1435,7 +1435,7 @@ companynr companynr explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008; fld1 companynr fld3 period 038008 37 reporters 1008 diff --git a/mysql-test/r/ctype_eucjpms.result b/mysql-test/r/ctype_eucjpms.result index 21aa38b7fe6..21aa38b7fe6 100755..100644 --- a/mysql-test/r/ctype_eucjpms.result +++ b/mysql-test/r/ctype_eucjpms.result diff --git a/mysql-test/r/ctype_utf8.result b/mysql-test/r/ctype_utf8.result index d1af2f4d428..626896bafcb 100644 --- a/mysql-test/r/ctype_utf8.result +++ b/mysql-test/r/ctype_utf8.result @@ -1537,7 +1537,7 @@ explain select substr(Z.a,-1), Z.a from t1 as Y join t1 as Z on Y.a=Z.a order by 1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Y ALL NULL NULL NULL NULL 2 Using temporary; Using filesort -1 SIMPLE Z ALL NULL NULL NULL NULL 2 Using where; Using join buffer +1 SIMPLE Z ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) select substr(Z.a,-1), Z.a from t1 as Y join t1 as Z on Y.a=Z.a order by 1; substr(Z.a,-1) a 3 123 diff --git a/mysql-test/r/derived.result b/mysql-test/r/derived.result index 80f04ffd455..e707f01edbf 100644 --- a/mysql-test/r/derived.result +++ b/mysql-test/r/derived.result @@ -58,7 +58,7 @@ a b a b explain select * from t1 as x1, (select * from t1) as x2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY x1 ALL NULL NULL NULL NULL 4 -1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 Using join buffer +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join) 2 DERIVED t1 ALL NULL NULL NULL NULL 4 drop table if exists t2,t3; select * from (select 1) as a; @@ -189,13 +189,13 @@ pla_id test explain SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY m2 ALL NULL NULL NULL NULL 9 -1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort 2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1 explain SELECT STRAIGHT_JOIN d.pla_id, m2.test FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY m2 ALL NULL NULL NULL NULL 9 -1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort 2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1 drop table t1,t2; @@ -246,7 +246,7 @@ a a explain select * from ( select * from t1 union select * from t1) a,(select * from t1 union select * from t1) b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 -1 PRIMARY <derived4> ALL NULL NULL NULL NULL 2 Using join buffer +1 PRIMARY <derived4> ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join) 4 DERIVED t1 ALL NULL NULL NULL NULL 2 5 UNION t1 ALL NULL NULL NULL NULL 2 NULL UNION RESULT <union4,5> ALL NULL NULL NULL NULL NULL @@ -313,7 +313,7 @@ explain SELECT s.name, AVG(s.val) AS median FROM (SELECT x.name, x.val FROM t1 x id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 Using temporary; Using filesort 2 DERIVED x ALL NULL NULL NULL NULL 17 Using temporary; Using filesort -2 DERIVED y ALL NULL NULL NULL NULL 17 Using where; Using join buffer +2 DERIVED y ALL NULL NULL NULL NULL 17 Using where; Using join buffer (flat, BNL join) drop table t1; create table t2 (a int, b int, primary key (a)); insert into t2 values (1,7),(2,7); diff --git a/mysql-test/r/distinct.result b/mysql-test/r/distinct.result index ee8f9f897ad..ac87ea049a0 100644 --- a/mysql-test/r/distinct.result +++ b/mysql-test/r/distinct.result @@ -173,9 +173,9 @@ INSERT INTO t2 values (1),(2),(3); INSERT INTO t3 VALUES (1,'1'),(2,'2'),(1,'1'),(2,'2'); explain SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 Using temporary +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 Using where; Using temporary 1 SIMPLE t3 ref a a 5 test.t1.b 2 Using index -1 SIMPLE t2 index a a 4 NULL 5 Using where; Using index; Distinct; Using join buffer +1 SIMPLE t2 index a a 4 NULL 5 Using where; Using index; Distinct; Using join buffer (flat, BNL join) SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a; a 1 @@ -300,11 +300,11 @@ WHERE AND ((t1.id=j_lj_t3.id AND t3_lj.id IS NULL) OR (t1.id=t3.id AND t3.idx=2)); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index id id 4 NULL 2 Using index; Using temporary -1 SIMPLE t2 index id id 8 NULL 1 Using index; Distinct; Using join buffer -1 SIMPLE t3 index id id 8 NULL 1 Using index; Distinct; Using join buffer -1 SIMPLE j_lj_t2 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer +1 SIMPLE t2 index id id 8 NULL 1 Using index; Distinct; Using join buffer (flat, BNL join) +1 SIMPLE t3 index id id 8 NULL 1 Using index; Distinct; Using join buffer (flat, BNL join) +1 SIMPLE j_lj_t2 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer (flat, BNL join) 1 SIMPLE t2_lj ref id id 4 test.j_lj_t2.id 1 Using where; Using index; Distinct -1 SIMPLE j_lj_t3 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer +1 SIMPLE j_lj_t3 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer (flat, BNL join) 1 SIMPLE t3_lj ref id id 4 test.j_lj_t3.id 1 Using where; Using index; Distinct SELECT DISTINCT t1.id @@ -515,7 +515,7 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT DISTINCT t1_1.a, t1_1.b FROM t1 t1_1, t1 t1_2; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1_1 ALL NULL NULL NULL NULL 3 Using temporary -1 SIMPLE t1_2 index NULL PRIMARY 4 NULL 3 Using index; Distinct; Using join buffer +1 SIMPLE t1_2 index NULL PRIMARY 4 NULL 3 Using index; Distinct; Using join buffer (flat, BNL join) EXPLAIN SELECT DISTINCT t1_1.a, t1_1.b FROM t1 t1_1, t1 t1_2 WHERE t1_1.a = t1_2.a; id select_type table type possible_keys key key_len ref rows Extra diff --git a/mysql-test/r/explain.result b/mysql-test/r/explain.result index 66045ece27d..e0993c9cfee 100644 --- a/mysql-test/r/explain.result +++ b/mysql-test/r/explain.result @@ -116,7 +116,7 @@ FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00 2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort -2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) Warnings: Note 1003 select 1 AS `1` from (select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1` EXPLAIN EXTENDED SELECT 1 @@ -124,7 +124,7 @@ FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00 2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort -2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) Warnings: Note 1003 select 1 AS `1` from (select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1` prepare s1 from @@ -134,7 +134,7 @@ execute s1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00 2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort -2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) Warnings: Note 1003 select 1 AS `1` from (select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1` prepare s1 from @@ -144,14 +144,14 @@ execute s1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00 2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort -2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) Warnings: Note 1003 select 1 AS `1` from (select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1` execute s1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00 2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort -2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) Warnings: Note 1003 select 1 AS `1` from (select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1` DROP TABLE t1,t2; diff --git a/mysql-test/r/func_gconcat.result b/mysql-test/r/func_gconcat.result index ae48eb1e0ff..01794f7b93f 100644 --- a/mysql-test/r/func_gconcat.result +++ b/mysql-test/r/func_gconcat.result @@ -986,7 +986,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> system NULL NULL NULL NULL 1 100.00 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort; Distinct -2 DERIVED td ALL NULL NULL NULL NULL 2 100.00 Distinct; Using join buffer +2 DERIVED td ALL NULL NULL NULL NULL 2 100.00 Distinct; Using join buffer (flat, BNL join) Warnings: Note 1003 select 1 AS `1` from (select distinct group_concat(`test`.`td`.`f1` separator ',') AS `GROUP_CONCAT(td.f1)` from `test`.`t1` join `test`.`t1` `td` group by `test`.`td`.`f1`) `d` join `test`.`t1` SELECT 1 FROM @@ -1007,7 +1007,7 @@ t1 t2, t1 GROUP BY t1.a) AS d; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> system NULL NULL NULL NULL 1 100.00 2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort -2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) Warnings: Note 1003 select 1 AS `1` from (select group_concat(`test`.`t1`.`a` order by `test`.`t1`.`a` ASC separator ',') AS `GROUP_CONCAT(t1.a ORDER BY t1.a ASC)` from `test`.`t1` `t2` join `test`.`t1` group by `test`.`t1`.`a`) `d` DROP TABLE t1; diff --git a/mysql-test/r/func_group.result b/mysql-test/r/func_group.result index da800c04d9d..e430e0c9401 100644 --- a/mysql-test/r/func_group.result +++ b/mysql-test/r/func_group.result @@ -614,7 +614,7 @@ explain select max(t1.a3), min(t2.a2) from t1, t2 where t1.a2 = 2 and t1.a3 < 'MIN' and t2.a3 > 'CA'; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range k1 k1 7 NULL 1 Using where; Using index -1 SIMPLE t2 range k1 k1 3 NULL 4 Using where; Using index; Using join buffer +1 SIMPLE t2 range k1 k1 3 NULL 4 Using where; Using index; Using join buffer (flat, BNL join) explain select min(a4 - 0.01) from t1; id select_type table type possible_keys key key_len ref rows Extra @@ -651,7 +651,7 @@ explain select concat(min(t1.a1),min(t2.a4)) from t1, t2 where t2.a4 <> 'AME'; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 range k2 k2 4 NULL 6 Using where; Using index -1 SIMPLE t1 index NULL PRIMARY 3 NULL 15 Using index; Using join buffer +1 SIMPLE t1 index NULL PRIMARY 3 NULL 15 Using index; Using join buffer (flat, BNL join) drop table t1, t2; create table t1 (a char(10)); insert into t1 values ('a'),('b'),('c'); diff --git a/mysql-test/r/func_group_innodb.result b/mysql-test/r/func_group_innodb.result index 908e85c1652..11d8e390f1d 100644 --- a/mysql-test/r/func_group_innodb.result +++ b/mysql-test/r/func_group_innodb.result @@ -79,7 +79,7 @@ min(7) explain select min(7) from t2i join t1i; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2i ALL NULL NULL NULL NULL 1 -1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer +1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join) select min(7) from t2i join t1i; min(7) NULL @@ -95,7 +95,7 @@ max(7) explain select max(7) from t2i join t1i; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2i ALL NULL NULL NULL NULL 1 -1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer +1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join) select max(7) from t2i join t1i; max(7) NULL diff --git a/mysql-test/r/func_str.result b/mysql-test/r/func_str.result index 4268268fabb..c50e3757600 100644 --- a/mysql-test/r/func_str.result +++ b/mysql-test/r/func_str.result @@ -2550,12 +2550,12 @@ insert into t1 values (-1),(null); explain select 1 as a from t1,(select decode(f1,f1) as b from t1) a; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 -1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using join buffer +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join) 2 DERIVED t1 ALL NULL NULL NULL NULL 2 explain select 1 as a from t1,(select encode(f1,f1) as b from t1) a; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 -1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using join buffer +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join) 2 DERIVED t1 ALL NULL NULL NULL NULL 2 drop table t1; # diff --git a/mysql-test/r/gis.result b/mysql-test/r/gis.result index 3e28227d542..5b5fe968d1b 100644 --- a/mysql-test/r/gis.result +++ b/mysql-test/r/gis.result @@ -395,7 +395,7 @@ Intersects(g1.g, g2.g) as i, Crosses(g1.g, g2.g) as r FROM gis_geometrycollection g1, gis_geometrycollection g2 ORDER BY first, second; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE g1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort -1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`g1`.`fid` AS `first`,`test`.`g2`.`fid` AS `second`,within(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `w`,contains(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `c`,overlaps(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `o`,equals(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `e`,disjoint(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `d`,touches(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `t`,intersects(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `i`,crosses(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `r` from `test`.`gis_geometrycollection` `g1` join `test`.`gis_geometrycollection` `g2` order by `test`.`g1`.`fid`,`test`.`g2`.`fid` DROP TABLE gis_point, gis_line, gis_polygon, gis_multi_point, gis_multi_line, gis_multi_polygon, gis_geometrycollection, gis_geometry; diff --git a/mysql-test/r/greedy_optimizer.result b/mysql-test/r/greedy_optimizer.result index c0012c297d1..b4844785318 100644 --- a/mysql-test/r/greedy_optimizer.result +++ b/mysql-test/r/greedy_optimizer.result @@ -121,11 +121,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -133,59 +133,59 @@ Last_query_cost 821.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 821.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value @@ -201,11 +201,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -213,59 +213,59 @@ Last_query_cost 821.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 821.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 289.418727 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 289.418727 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value Last_query_cost 289.418727 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value @@ -277,11 +277,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -289,60 +289,60 @@ Last_query_cost 821.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 821.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 @@ -353,11 +353,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -365,59 +365,59 @@ Last_query_cost 821.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 821.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 289.418727 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 289.418727 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value Last_query_cost 289.418727 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value @@ -433,11 +433,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -445,59 +445,59 @@ Last_query_cost 821.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 821.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value @@ -509,11 +509,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -521,60 +521,60 @@ Last_query_cost 821.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 821.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 @@ -585,11 +585,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -597,59 +597,59 @@ Last_query_cost 821.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 821.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value Last_query_cost 794.837037 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value diff --git a/mysql-test/r/group_by.result b/mysql-test/r/group_by.result index cd36e895022..495abc66f72 100644 --- a/mysql-test/r/group_by.result +++ b/mysql-test/r/group_by.result @@ -537,11 +537,11 @@ a b explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort -1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer +1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b ORDER BY NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary -1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer +1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) drop table t1,t2; create table t1 (a int, b int); insert into t1 values (1, 4),(10, 40),(1, 4),(10, 43),(1, 4),(10, 41),(1, 4),(10, 43),(1, 4); @@ -873,7 +873,7 @@ explain SELECT straight_join sql_no_cache v1.a, v1.b, v1.real_b from t2, v1 where t2.b=v1.a GROUP BY t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 index b b 2 NULL 10 Using index +1 SIMPLE t2 index b b 2 NULL 10 Using where; Using index 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 1 test.t2.b 1 SELECT straight_join sql_no_cache v1.a, v1.b, v1.real_b from t2, v1 where t2.b=v1.a GROUP BY t2.b; diff --git a/mysql-test/r/group_min_max.result b/mysql-test/r/group_min_max.result index 471219dd1a0..6ae4b3cca87 100644 --- a/mysql-test/r/group_min_max.result +++ b/mysql-test/r/group_min_max.result @@ -2267,7 +2267,7 @@ ON t1_outer1.a = (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) AND t1_outer1.b = t1_outer2.b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1_outer1 ref a a 5 const 1 Using where; Using index -1 PRIMARY t1_outer2 index NULL a 10 NULL 15 Using where; Using index; Using join buffer +1 PRIMARY t1_outer2 index NULL a 10 NULL 15 Using where; Using index; Using join buffer (flat, BNL join) 2 SUBQUERY t1 range NULL a 5 NULL 8 Using index for group-by EXPLAIN SELECT (SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x FROM t1 AS t1_outer) x2 FROM t1 AS t1_outer2; diff --git a/mysql-test/r/index_merge_myisam.result b/mysql-test/r/index_merge_myisam.result index 9da4e21a84d..a5f2ae080b4 100644 --- a/mysql-test/r/index_merge_myisam.result +++ b/mysql-test/r/index_merge_myisam.result @@ -271,7 +271,7 @@ explain select * from t0,t1 where t0.key1 = 5 and (t1.key1 = t0.key1 or t1.key8 = t0.key1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t0 ref i1 i1 4 const 1 -1 SIMPLE t1 index_merge i1,i8 i1,i8 4,4 NULL 2 Using union(i1,i8); Using where; Using join buffer +1 SIMPLE t1 index_merge i1,i8 i1,i8 4,4 NULL 2 Using union(i1,i8); Using where; Using join buffer (flat, BNL join) explain select * from t0,t1 where t0.key1 < 3 and (t1.key1 = t0.key1 or t1.key8 = t0.key1); id select_type table type possible_keys key key_len ref rows Extra @@ -348,7 +348,7 @@ where (A.key1 < 500000 or A.key2 < 3) and (B.key1 < 500000 or B.key2 < 3); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE A index_merge i1,i2 i1,i2 4,4 NULL 1013 Using sort_union(i1,i2); Using where -1 SIMPLE B index_merge i1,i2 i1,i2 4,4 NULL 1013 Using sort_union(i1,i2); Using where; Using join buffer +1 SIMPLE B index_merge i1,i2 i1,i2 4,4 NULL 1013 Using sort_union(i1,i2); Using where; Using join buffer (flat, BNL join) select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) from t0 as A force index(i1,i2), t0 as B force index (i1,i2) where (A.key1 < 500000 or A.key2 < 3) @@ -362,7 +362,7 @@ where (A.key1 = 1 or A.key2 = 1) and (B.key1 = 1 or B.key2 = 1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE A index_merge i1,i2 i1,i2 4,4 NULL 1020 Using union(i1,i2); Using where -1 SIMPLE B index_merge i1,i2 i1,i2 4,4 NULL 1020 Using union(i1,i2); Using where; Using join buffer +1 SIMPLE B index_merge i1,i2 i1,i2 4,4 NULL 1020 Using union(i1,i2); Using where; Using join buffer (flat, BNL join) select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) from t0 as A force index(i1,i2), t0 as B force index (i1,i2) where (A.key1 = 1 or A.key2 = 1) @@ -377,7 +377,7 @@ where (A.key1 = 1 and A.key2 = 1 and A.key3 = 1 and A.key4=1 and A.key5=1 and A. and (B.key1 = 1 and B.key2 = 1 and B.key3 = 1 and B.key4=1 and B.key5=1 and B.key6=1 and B.key7 = 1 or B.key8=1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE A index_merge i1,i2,i3,i4,i5,i6,i7?,i8 i2,i3,i4,i5,i6,i7?,i8 X NULL # Using union(intersect(i2,i3,i4,i5,i6,i7?),i8); Using where -1 SIMPLE B index_merge i1,i2,i3,i4,i5,i6,i7?,i8 i2,i3,i4,i5,i6,i7?,i8 X NULL # Using union(intersect(i2,i3,i4,i5,i6,i7?),i8); Using where; Using join buffer +1 SIMPLE B index_merge i1,i2,i3,i4,i5,i6,i7?,i8 i2,i3,i4,i5,i6,i7?,i8 X NULL # Using union(intersect(i2,i3,i4,i5,i6,i7?),i8); Using where; Using join buffer (flat, BNL join) select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) from t0 as A, t0 as B where (A.key1 = 1 and A.key2 = 1 and A.key3 = 1 and A.key4=1 and A.key5=1 and A.key6=1 and A.key7 = 1 or A.key8=1) diff --git a/mysql-test/r/information_schema.result b/mysql-test/r/information_schema.result index 8a2b258e356..b32e25ef07e 100644 --- a/mysql-test/r/information_schema.result +++ b/mysql-test/r/information_schema.result @@ -324,7 +324,7 @@ information_schema.SCHEMATA b where a.ROUTINE_SCHEMA = b.SCHEMA_NAME; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE # ALL NULL NULL NULL NULL NULL -1 SIMPLE # ALL NULL NULL NULL NULL NULL Using where; Using join buffer +1 SIMPLE # ALL NULL NULL NULL NULL NULL Using where; Using join buffer (flat, BNL join) select a.ROUTINE_NAME, b.name from information_schema.ROUTINES a, mysql.proc b where a.ROUTINE_NAME = convert(b.name using utf8) AND a.ROUTINE_SCHEMA='test' order by 1; ROUTINE_NAME name @@ -1450,7 +1450,7 @@ from information_schema.tables a, information_schema.columns b where a.table_name='t1' and a.table_schema='test' and b.table_name=a.table_name; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE a ALL NULL TABLE_SCHEMA,TABLE_NAME NULL NULL NULL Using where; Skip_open_table; Scanned 0 databases -1 SIMPLE b ALL NULL NULL NULL NULL NULL Using where; Open_frm_only; Scanned all databases; Using join buffer +1 SIMPLE b ALL NULL NULL NULL NULL NULL Using where; Open_frm_only; Scanned all databases; Using join buffer (flat, BNL join) SELECT * FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME = 'mysqltest'; CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH diff --git a/mysql-test/r/join.result b/mysql-test/r/join.result index af0a9d5f98d..5507c16fe5d 100644 --- a/mysql-test/r/join.result +++ b/mysql-test/r/join.result @@ -404,7 +404,7 @@ SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e ORDER BY t1.b, t1.c; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 32 Using temporary; Using filesort -1 SIMPLE t2 ALL NULL NULL NULL NULL 16 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 16 Using where; Using join buffer (flat, BNL join) SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e ORDER BY t1.b, t1.c; e @@ -846,7 +846,7 @@ select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b; a b a a explain select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 4 +1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index We expect rnd_next=5, and read_key must be 0 because of short-cutting: @@ -889,8 +889,8 @@ Z vv: Following query must use ALL(t1), eq_ref(A), eq_ref(B): vv explain select * from t1, t2 A, t2 B where A.a = t1.a and B.a=A.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 10 -1 SIMPLE A eq_ref PRIMARY PRIMARY 4 test.t1.a 1 +1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where +1 SIMPLE A eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where 1 SIMPLE B eq_ref PRIMARY PRIMARY 4 test.A.b 1 show status like '%cost%'; Variable_name Value @@ -910,7 +910,7 @@ INSERT INTO t1 SELECT a + 64, b FROM t1; INSERT INTO t2 SELECT a, b FROM t1; EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a LIMIT 2; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 index NULL PRIMARY 4 NULL 2 +1 SIMPLE t1 index NULL PRIMARY 4 NULL 2 Using where 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a LIMIT 2; id select_type table type possible_keys key key_len ref rows Extra @@ -924,7 +924,7 @@ a b c d 2 NULL 2 NULL EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 128 Using filesort +1 SIMPLE t1 ALL NULL NULL NULL NULL 128 Using where; Using filesort 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a; id select_type table type possible_keys key key_len ref rows Extra @@ -1095,11 +1095,11 @@ ON t4.a = t5.a ON t1.a = t3.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t3 ref a a 5 test.t1.a 2 Using index +1 SIMPLE t3 ref a a 5 test.t1.a 2 Using where; Using index 1 SIMPLE t4 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t5 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t6 ALL NULL NULL NULL NULL 0 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join) SELECT * FROM t1 JOIN t2 ON t1.a = t2.a @@ -1184,4 +1184,34 @@ NULL NULL 1 DROP TABLE t1, t2, mm1; +# +# BUG#47217 Lost optimization caused slowdown & wrong result. +# +CREATE TABLE t1 (pk INT, v VARCHAR(2), PRIMARY KEY(pk)); +CREATE INDEX ix1 ON t1(v); +CREATE TABLE t2 (pk INT, v VARCHAR(2), PRIMARY KEY(pk)); +CREATE INDEX ix2 ON t2(v); +INSERT INTO t1 VALUES (1,'a'),(2,NULL); +INSERT INTO t2 VALUES (1,NULL); +EXPLAIN SELECT * FROM t1 JOIN t2 ON t1.v = t2.v ORDER BY 1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +EXPLAIN SELECT * FROM t1 JOIN t2 ON t1.v = t2.v; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +INSERT INTO t1 VALUES (3,'b'),(4,NULL),(5,'c'),(6,'cc'),(7,'d'), +(8,'dd'),(9,'e'),(10,'ee'); +INSERT INTO t2 VALUES (2,NULL); +FLUSH STATUS; +SELECT * FROM t1 JOIN t2 ON t1.v = t2.v WHERE t2.v IS NULL ORDER BY 1; +pk v pk v +SHOW STATUS LIKE 'Handler_read_%'; +Variable_name Value +Handler_read_first 0 +Handler_read_key 1 +Handler_read_next 0 +Handler_read_prev 0 +Handler_read_rnd 0 +Handler_read_rnd_next 1 +DROP TABLE t1, t2; End of 5.1 tests diff --git a/mysql-test/r/join_cache.result b/mysql-test/r/join_cache.result index 5437538023c..e0543fd085b 100644 --- a/mysql-test/r/join_cache.result +++ b/mysql-test/r/join_cache.result @@ -1,5 +1,8 @@ DROP TABLE IF EXISTS t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11; DROP DATABASE IF EXISTS world; +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; set names utf8; CREATE DATABASE world; use world; @@ -42,7 +45,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer +1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -71,8 +74,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer -1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer +1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer (flat, BNL join) +1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -230,7 +233,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer +1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -259,8 +262,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer -1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer +1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer (flat, BNL join) +1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (incremental, BNL join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -422,7 +425,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer +1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -451,8 +454,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer -1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer +1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer (flat, BNL join) +1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -610,7 +613,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer +1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (flat, BNL join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -639,8 +642,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer -1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer +1 SIMPLE CountryLanguage ALL NULL NULL NULL NULL 984 Using where; Using join buffer (flat, BNL join) +1 SIMPLE City ALL NULL NULL NULL NULL 4079 Using where; Using join buffer (incremental, BNL join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -827,6 +830,626 @@ INDEX (Percentage) show variables like 'join_buffer_size'; Variable_name Value join_buffer_size 131072 +set join_cache_level=3; +show variables like 'join_cache_level'; +Variable_name Value +join_cache_level 3 +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country +WHERE City.Country=Country.Code AND +Country.Name LIKE 'L%' AND City.Population > 100000; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join) +SELECT City.Name, Country.Name FROM City,Country +WHERE City.Country=Country.Code AND +Country.Name LIKE 'L%' AND City.Population > 100000; +Name Name +Vientiane Laos +Riga Latvia +Daugavpils Latvia +Maseru Lesotho +Beirut Lebanon +Tripoli Lebanon +Monrovia Liberia +Tripoli Libyan Arab Jamahiriya +Bengasi Libyan Arab Jamahiriya +Misrata Libyan Arab Jamahiriya +Vilnius Lithuania +Kaunas Lithuania +Klaipeda Lithuania +?iauliai Lithuania +Panevezys Lithuania +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language +FROM City,Country,CountryLanguage +WHERE City.Country=Country.Code AND +CountryLanguage.Country=Country.Code AND +City.Name LIKE 'L%' AND Country.Population > 3000000 AND +CountryLanguage.Percentage > 50; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join) +SELECT City.Name, Country.Name, CountryLanguage.Language +FROM City,Country,CountryLanguage +WHERE City.Country=Country.Code AND +CountryLanguage.Country=Country.Code AND +City.Name LIKE 'L%' AND Country.Population > 3000000 AND +CountryLanguage.Percentage > 50; +Name Name Language +Leiden Netherlands Dutch +La Matanza Argentina Spanish +Lomas de Zamora Argentina Spanish +La Plata Argentina Spanish +Lanús Argentina Spanish +Las Heras Argentina Spanish +La Rioja Argentina Spanish +Liège Belgium Dutch +La Paz Bolivia Spanish +Londrina Brazil Portuguese +Limeira Brazil Portuguese +Lages Brazil Portuguese +Luziânia Brazil Portuguese +Lauro de Freitas Brazil Portuguese +Linhares Brazil Portuguese +London United Kingdom English +Liverpool United Kingdom English +Leeds United Kingdom English +Leicester United Kingdom English +Luton United Kingdom English +Los Angeles Chile Spanish +La Serena Chile Spanish +La Romana Dominican Republic Spanish +Loja Ecuador Spanish +Luxor Egypt Arabic +Las Palmas de Gran Canaria Spain Spanish +L´Hospitalet de Llobregat Spain Spanish +Leganés Spain Spanish +León Spain Spanish +Logroño Spain Spanish +Lleida (Lérida) Spain Spanish +Le-Cap-Haïtien Haiti Haiti Creole +La Ceiba Honduras Spanish +Livorno Italy Italian +Latina Italy Italian +Lecce Italy Italian +La Spezia Italy Italian +Linz Austria German +London Canada English +Laval Canada English +Longueuil Canada English +Lanzhou China Chinese +Luoyang China Chinese +Liuzhou China Chinese +Liaoyang China Chinese +Liupanshui China Chinese +Liaoyuan China Chinese +Lianyungang China Chinese +Leshan China Chinese +Linyi China Chinese +Luzhou China Chinese +Laiwu China Chinese +Liaocheng China Chinese +Laizhou China Chinese +Linfen China Chinese +Liangcheng China Chinese +Longkou China Chinese +Langfang China Chinese +Liu´an China Chinese +Longjing China Chinese +Lengshuijiang China Chinese +Laiyang China Chinese +Longyan China Chinese +Linhe China Chinese +Leiyang China Chinese +Loudi China Chinese +Luohe China Chinese +Linqing China Chinese +Laohekou China Chinese +Linchuan China Chinese +Lhasa China Chinese +Lianyuan China Chinese +Liyang China Chinese +Liling China Chinese +Linhai China Chinese +Larisa Greece Greek +La Habana Cuba Spanish +Lilongwe Malawi Chichewa +León Mexico Spanish +La Paz Mexico Spanish +La Paz Mexico Spanish +Lázaro Cárdenas Mexico Spanish +Lagos de Moreno Mexico Spanish +Lerdo Mexico Spanish +Los Cabos Mexico Spanish +Lerma Mexico Spanish +Las Margaritas Mexico Spanish +Lashio (Lasho) Myanmar Burmese +Lalitapur Nepal Nepali +León Nicaragua Spanish +Lambaré Paraguay Spanish +Lima Peru Spanish +Lisboa Portugal Portuguese +Lódz Poland Polish +Lublin Poland Polish +Legnica Poland Polish +Lyon France French +Le Havre France French +Lille France French +Le Mans France French +Limoges France French +Linköping Sweden Swedish +Lund Sweden Swedish +Leipzig Germany German +Lübeck Germany German +Ludwigshafen am Rhein Germany German +Leverkusen Germany German +Lünen Germany German +Lahti Finland Finnish +Lausanne Switzerland German +Latakia Syria Arabic +Luchou Taiwan Min +Lungtan Taiwan Min +Liberec Czech Republic Czech +Lviv Ukraine Ukrainian +Lugansk Ukraine Ukrainian +Lutsk Ukraine Ukrainian +Lysyt?ansk Ukraine Ukrainian +Lower Hutt New Zealand English +Lida Belarus Belorussian +Los Teques Venezuela Spanish +Lipetsk Russian Federation Russian +Ljubertsy Russian Federation Russian +Leninsk-Kuznetski Russian Federation Russian +Long Xuyen Vietnam Vietnamese +Los Angeles United States English +Las Vegas United States English +Long Beach United States English +Lexington-Fayette United States English +Louisville United States English +Lincoln United States English +Lubbock United States English +Little Rock United States English +Laredo United States English +Lakewood United States English +Lansing United States English +Lancaster United States English +Lafayette United States English +Lowell United States English +Livonia United States English +EXPLAIN +SELECT Name FROM City +WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND +City.Population > 100000; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join) +SELECT Name FROM City +WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND +City.Population > 100000; +Name +Vientiane +Riga +Daugavpils +Maseru +Beirut +Tripoli +Monrovia +Tripoli +Bengasi +Misrata +Vilnius +Kaunas +Klaipeda +?iauliai +Panevezys +EXPLAIN +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) +FROM Country LEFT JOIN CountryLanguage ON +(CountryLanguage.Country=Country.Code AND Language='English') +WHERE +Country.Population > 10000000; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where +1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BNLH join) +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) +FROM Country LEFT JOIN CountryLanguage ON +(CountryLanguage.Country=Country.Code AND Language='English') +WHERE +Country.Population > 10000000; +Name IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) +Australia 81.2 +United Kingdom 97.3 +Canada 60.4 +United States 86.2 +Zimbabwe 2.2 +Japan 0.1 +South Africa 8.5 +Malaysia 1.6 +Afghanistan NULL +Netherlands NULL +Algeria NULL +Angola NULL +Argentina NULL +Bangladesh NULL +Belgium NULL +Brazil NULL +Burkina Faso NULL +Chile NULL +Ecuador NULL +Egypt NULL +Spain NULL +Ethiopia NULL +Philippines NULL +Ghana NULL +Guatemala NULL +Indonesia NULL +India NULL +Iraq NULL +Iran NULL +Italy NULL +Yemen NULL +Yugoslavia NULL +Cambodia NULL +Cameroon NULL +Kazakstan NULL +Kenya NULL +China NULL +Colombia NULL +Congo, The Democratic Republic of the NULL +North Korea NULL +South Korea NULL +Greece NULL +Cuba NULL +Madagascar NULL +Malawi NULL +Mali NULL +Morocco NULL +Mexico NULL +Mozambique NULL +Myanmar NULL +Nepal NULL +Niger NULL +Nigeria NULL +Côte d?Ivoire NULL +Pakistan NULL +Peru NULL +Poland NULL +France NULL +Romania NULL +Germany NULL +Saudi Arabia NULL +Somalia NULL +Sri Lanka NULL +Sudan NULL +Syria NULL +Taiwan NULL +Tanzania NULL +Thailand NULL +Czech Republic NULL +Turkey NULL +Uganda NULL +Ukraine NULL +Hungary NULL +Uzbekistan NULL +Belarus NULL +Venezuela NULL +Russian Federation NULL +Vietnam NULL +show variables like 'join_buffer_size'; +Variable_name Value +join_buffer_size 131072 +set join_cache_level=4; +show variables like 'join_cache_level'; +Variable_name Value +join_cache_level 4 +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country +WHERE City.Country=Country.Code AND +Country.Name LIKE 'L%' AND City.Population > 100000; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join) +SELECT City.Name, Country.Name FROM City,Country +WHERE City.Country=Country.Code AND +Country.Name LIKE 'L%' AND City.Population > 100000; +Name Name +Vientiane Laos +Riga Latvia +Daugavpils Latvia +Maseru Lesotho +Beirut Lebanon +Tripoli Lebanon +Monrovia Liberia +Tripoli Libyan Arab Jamahiriya +Bengasi Libyan Arab Jamahiriya +Misrata Libyan Arab Jamahiriya +Vilnius Lithuania +Kaunas Lithuania +Klaipeda Lithuania +?iauliai Lithuania +Panevezys Lithuania +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language +FROM City,Country,CountryLanguage +WHERE City.Country=Country.Code AND +CountryLanguage.Country=Country.Code AND +City.Name LIKE 'L%' AND Country.Population > 3000000 AND +CountryLanguage.Percentage > 50; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer (incremental, BNLH join) +SELECT City.Name, Country.Name, CountryLanguage.Language +FROM City,Country,CountryLanguage +WHERE City.Country=Country.Code AND +CountryLanguage.Country=Country.Code AND +City.Name LIKE 'L%' AND Country.Population > 3000000 AND +CountryLanguage.Percentage > 50; +Name Name Language +Leiden Netherlands Dutch +La Matanza Argentina Spanish +Lomas de Zamora Argentina Spanish +La Plata Argentina Spanish +Lanús Argentina Spanish +Las Heras Argentina Spanish +La Rioja Argentina Spanish +Liège Belgium Dutch +La Paz Bolivia Spanish +Londrina Brazil Portuguese +Limeira Brazil Portuguese +Lages Brazil Portuguese +Luziânia Brazil Portuguese +Lauro de Freitas Brazil Portuguese +Linhares Brazil Portuguese +London United Kingdom English +Liverpool United Kingdom English +Leeds United Kingdom English +Leicester United Kingdom English +Luton United Kingdom English +Los Angeles Chile Spanish +La Serena Chile Spanish +La Romana Dominican Republic Spanish +Loja Ecuador Spanish +Luxor Egypt Arabic +Las Palmas de Gran Canaria Spain Spanish +L´Hospitalet de Llobregat Spain Spanish +Leganés Spain Spanish +León Spain Spanish +Logroño Spain Spanish +Lleida (Lérida) Spain Spanish +Le-Cap-Haïtien Haiti Haiti Creole +La Ceiba Honduras Spanish +Livorno Italy Italian +Latina Italy Italian +Lecce Italy Italian +La Spezia Italy Italian +Linz Austria German +London Canada English +Laval Canada English +Longueuil Canada English +Lanzhou China Chinese +Luoyang China Chinese +Liuzhou China Chinese +Liaoyang China Chinese +Liupanshui China Chinese +Liaoyuan China Chinese +Lianyungang China Chinese +Leshan China Chinese +Linyi China Chinese +Luzhou China Chinese +Laiwu China Chinese +Liaocheng China Chinese +Laizhou China Chinese +Linfen China Chinese +Liangcheng China Chinese +Longkou China Chinese +Langfang China Chinese +Liu´an China Chinese +Longjing China Chinese +Lengshuijiang China Chinese +Laiyang China Chinese +Longyan China Chinese +Linhe China Chinese +Leiyang China Chinese +Loudi China Chinese +Luohe China Chinese +Linqing China Chinese +Laohekou China Chinese +Linchuan China Chinese +Lhasa China Chinese +Lianyuan China Chinese +Liyang China Chinese +Liling China Chinese +Linhai China Chinese +Larisa Greece Greek +La Habana Cuba Spanish +Lilongwe Malawi Chichewa +León Mexico Spanish +La Paz Mexico Spanish +La Paz Mexico Spanish +Lázaro Cárdenas Mexico Spanish +Lagos de Moreno Mexico Spanish +Lerdo Mexico Spanish +Los Cabos Mexico Spanish +Lerma Mexico Spanish +Las Margaritas Mexico Spanish +Lashio (Lasho) Myanmar Burmese +Lalitapur Nepal Nepali +León Nicaragua Spanish +Lambaré Paraguay Spanish +Lima Peru Spanish +Lisboa Portugal Portuguese +Lódz Poland Polish +Lublin Poland Polish +Legnica Poland Polish +Lyon France French +Le Havre France French +Lille France French +Le Mans France French +Limoges France French +Linköping Sweden Swedish +Lund Sweden Swedish +Leipzig Germany German +Lübeck Germany German +Ludwigshafen am Rhein Germany German +Leverkusen Germany German +Lünen Germany German +Lahti Finland Finnish +Lausanne Switzerland German +Latakia Syria Arabic +Luchou Taiwan Min +Lungtan Taiwan Min +Liberec Czech Republic Czech +Lviv Ukraine Ukrainian +Lugansk Ukraine Ukrainian +Lutsk Ukraine Ukrainian +Lysyt?ansk Ukraine Ukrainian +Lower Hutt New Zealand English +Lida Belarus Belorussian +Los Teques Venezuela Spanish +Lipetsk Russian Federation Russian +Ljubertsy Russian Federation Russian +Leninsk-Kuznetski Russian Federation Russian +Long Xuyen Vietnam Vietnamese +Los Angeles United States English +Las Vegas United States English +Long Beach United States English +Lexington-Fayette United States English +Louisville United States English +Lincoln United States English +Lubbock United States English +Little Rock United States English +Laredo United States English +Lakewood United States English +Lansing United States English +Lancaster United States English +Lafayette United States English +Lowell United States English +Livonia United States English +EXPLAIN +SELECT Name FROM City +WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND +City.Population > 100000; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join) +SELECT Name FROM City +WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND +City.Population > 100000; +Name +Vientiane +Riga +Daugavpils +Maseru +Beirut +Tripoli +Monrovia +Tripoli +Bengasi +Misrata +Vilnius +Kaunas +Klaipeda +?iauliai +Panevezys +EXPLAIN +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) +FROM Country LEFT JOIN CountryLanguage ON +(CountryLanguage.Country=Country.Code AND Language='English') +WHERE +Country.Population > 10000000; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where +1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BNLH join) +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) +FROM Country LEFT JOIN CountryLanguage ON +(CountryLanguage.Country=Country.Code AND Language='English') +WHERE +Country.Population > 10000000; +Name IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) +Australia 81.2 +United Kingdom 97.3 +Canada 60.4 +United States 86.2 +Zimbabwe 2.2 +Japan 0.1 +South Africa 8.5 +Malaysia 1.6 +Afghanistan NULL +Netherlands NULL +Algeria NULL +Angola NULL +Argentina NULL +Bangladesh NULL +Belgium NULL +Brazil NULL +Burkina Faso NULL +Chile NULL +Ecuador NULL +Egypt NULL +Spain NULL +Ethiopia NULL +Philippines NULL +Ghana NULL +Guatemala NULL +Indonesia NULL +India NULL +Iraq NULL +Iran NULL +Italy NULL +Yemen NULL +Yugoslavia NULL +Cambodia NULL +Cameroon NULL +Kazakstan NULL +Kenya NULL +China NULL +Colombia NULL +Congo, The Democratic Republic of the NULL +North Korea NULL +South Korea NULL +Greece NULL +Cuba NULL +Madagascar NULL +Malawi NULL +Mali NULL +Morocco NULL +Mexico NULL +Mozambique NULL +Myanmar NULL +Nepal NULL +Niger NULL +Nigeria NULL +Côte d?Ivoire NULL +Pakistan NULL +Peru NULL +Poland NULL +France NULL +Romania NULL +Germany NULL +Saudi Arabia NULL +Somalia NULL +Sri Lanka NULL +Sudan NULL +Syria NULL +Taiwan NULL +Tanzania NULL +Thailand NULL +Czech Republic NULL +Turkey NULL +Uganda NULL +Ukraine NULL +Hungary NULL +Uzbekistan NULL +Belarus NULL +Venezuela NULL +Russian Federation NULL +Vietnam NULL +show variables like 'join_buffer_size'; +Variable_name Value +join_buffer_size 131072 set join_cache_level=5; show variables like 'join_cache_level'; Variable_name Value @@ -837,7 +1460,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -866,8 +1489,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where -1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer -1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKA join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (flat, BKA join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -1015,21 +1638,13 @@ Lancaster United States English Lafayette United States English Lowell United States English Livonia United States English -# !!!NB igor: after backporting the SJ code the following should return -# EXPLAIN -# SELECT Name FROM City -# WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND -# City.Population > 100000; -# id select_type table type possible_keys key key_len ref rows Extra -# 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -# 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join) SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; @@ -1057,7 +1672,7 @@ WHERE Country.Population > 10000000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer +1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BKA join) SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) FROM Country LEFT JOIN CountryLanguage ON (CountryLanguage.Country=Country.Code AND Language='English') @@ -1152,7 +1767,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -1181,8 +1796,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where -1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer -1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKA join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (incremental, BKA join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -1330,21 +1945,13 @@ Lancaster United States English Lafayette United States English Lowell United States English Livonia United States English -# !!!NB igor: after backporting the SJ code the following should return -# EXPLAIN -# SELECT Name FROM City -# WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND -# City.Population > 100000; -# id select_type table type possible_keys key key_len ref rows Extra -# 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -# 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join) SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; @@ -1372,7 +1979,7 @@ WHERE Country.Population > 10000000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer +1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BKA join) SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) FROM Country LEFT JOIN CountryLanguage ON (CountryLanguage.Country=Country.Code AND Language='English') @@ -1467,7 +2074,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -1496,8 +2103,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where -1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer -1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKAH join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (flat, BKAH join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -1645,21 +2252,13 @@ Lancaster United States English Lafayette United States English Lowell United States English Livonia United States English -# !!!NB igor: after backporting the SJ code the following should return -# EXPLAIN -# SELECT Name FROM City -# WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND -# City.Population > 100000; -# id select_type table type possible_keys key key_len ref rows Extra -# 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -# 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join) SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; @@ -1687,7 +2286,7 @@ WHERE Country.Population > 10000000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer +1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BKAH join) SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) FROM Country LEFT JOIN CountryLanguage ON (CountryLanguage.Country=Country.Code AND Language='English') @@ -1782,7 +2381,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -1811,8 +2410,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where -1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer -1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKAH join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (incremental, BKAH join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -1960,21 +2559,13 @@ Lancaster United States English Lafayette United States English Lowell United States English Livonia United States English -# !!!NB igor: after backporting the SJ code the following should return -# EXPLAIN -# SELECT Name FROM City -# WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND -# City.Population > 100000; -# id select_type table type possible_keys key key_len ref rows Extra -# 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -# 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join) SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; @@ -2002,7 +2593,7 @@ WHERE Country.Population > 10000000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country ALL NULL NULL NULL NULL 239 Using where -1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer +1 SIMPLE CountryLanguage eq_ref PRIMARY PRIMARY 33 world.Country.Code,const 1 Using where; Using join buffer (flat, BKAH join) SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) FROM Country LEFT JOIN CountryLanguage ON (CountryLanguage.Country=Country.Code AND Language='English') @@ -2091,6 +2682,434 @@ set join_buffer_size=256; show variables like 'join_buffer_size'; Variable_name Value join_buffer_size 256 +set join_cache_level=3; +show variables like 'join_cache_level'; +Variable_name Value +join_cache_level 3 +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country +WHERE City.Country=Country.Code AND +Country.Name LIKE 'L%' AND City.Population > 100000; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join) +SELECT City.Name, Country.Name FROM City,Country +WHERE City.Country=Country.Code AND +Country.Name LIKE 'L%' AND City.Population > 100000; +Name Name +Vientiane Laos +Riga Latvia +Daugavpils Latvia +Maseru Lesotho +Beirut Lebanon +Tripoli Lebanon +Monrovia Liberia +Tripoli Libyan Arab Jamahiriya +Bengasi Libyan Arab Jamahiriya +Misrata Libyan Arab Jamahiriya +Vilnius Lithuania +Kaunas Lithuania +Klaipeda Lithuania +?iauliai Lithuania +Panevezys Lithuania +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language +FROM City,Country,CountryLanguage +WHERE City.Country=Country.Code AND +CountryLanguage.Country=Country.Code AND +City.Name LIKE 'L%' AND Country.Population > 3000000 AND +CountryLanguage.Percentage > 50; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join) +SELECT City.Name, Country.Name, CountryLanguage.Language +FROM City,Country,CountryLanguage +WHERE City.Country=Country.Code AND +CountryLanguage.Country=Country.Code AND +City.Name LIKE 'L%' AND Country.Population > 3000000 AND +CountryLanguage.Percentage > 50; +Name Name Language +Leiden Netherlands Dutch +La Matanza Argentina Spanish +Lomas de Zamora Argentina Spanish +La Plata Argentina Spanish +Lanús Argentina Spanish +Las Heras Argentina Spanish +La Rioja Argentina Spanish +Liège Belgium Dutch +La Paz Bolivia Spanish +Londrina Brazil Portuguese +Limeira Brazil Portuguese +Lages Brazil Portuguese +Luziânia Brazil Portuguese +Lauro de Freitas Brazil Portuguese +Linhares Brazil Portuguese +London United Kingdom English +Liverpool United Kingdom English +Leeds United Kingdom English +Leicester United Kingdom English +Luton United Kingdom English +Los Angeles Chile Spanish +La Serena Chile Spanish +La Romana Dominican Republic Spanish +Loja Ecuador Spanish +Luxor Egypt Arabic +Las Palmas de Gran Canaria Spain Spanish +L´Hospitalet de Llobregat Spain Spanish +Leganés Spain Spanish +León Spain Spanish +Logroño Spain Spanish +Lleida (Lérida) Spain Spanish +Le-Cap-Haïtien Haiti Haiti Creole +La Ceiba Honduras Spanish +Livorno Italy Italian +Latina Italy Italian +Lecce Italy Italian +La Spezia Italy Italian +Linz Austria German +London Canada English +Laval Canada English +Longueuil Canada English +Lanzhou China Chinese +Luoyang China Chinese +Liuzhou China Chinese +Liaoyang China Chinese +Liupanshui China Chinese +Liaoyuan China Chinese +Lianyungang China Chinese +Leshan China Chinese +Linyi China Chinese +Luzhou China Chinese +Laiwu China Chinese +Liaocheng China Chinese +Laizhou China Chinese +Linfen China Chinese +Liangcheng China Chinese +Longkou China Chinese +Langfang China Chinese +Liu´an China Chinese +Longjing China Chinese +Lengshuijiang China Chinese +Laiyang China Chinese +Longyan China Chinese +Linhe China Chinese +Leiyang China Chinese +Loudi China Chinese +Luohe China Chinese +Linqing China Chinese +Laohekou China Chinese +Linchuan China Chinese +Lhasa China Chinese +Lianyuan China Chinese +Liyang China Chinese +Liling China Chinese +Linhai China Chinese +Larisa Greece Greek +La Habana Cuba Spanish +Lilongwe Malawi Chichewa +León Mexico Spanish +La Paz Mexico Spanish +La Paz Mexico Spanish +Lázaro Cárdenas Mexico Spanish +Lagos de Moreno Mexico Spanish +Lerdo Mexico Spanish +Los Cabos Mexico Spanish +Lerma Mexico Spanish +Las Margaritas Mexico Spanish +Lashio (Lasho) Myanmar Burmese +Lalitapur Nepal Nepali +León Nicaragua Spanish +Lambaré Paraguay Spanish +Lima Peru Spanish +Lisboa Portugal Portuguese +Lódz Poland Polish +Lublin Poland Polish +Legnica Poland Polish +Lyon France French +Le Havre France French +Lille France French +Le Mans France French +Limoges France French +Linköping Sweden Swedish +Lund Sweden Swedish +Leipzig Germany German +Lübeck Germany German +Ludwigshafen am Rhein Germany German +Leverkusen Germany German +Lünen Germany German +Lahti Finland Finnish +Lausanne Switzerland German +Latakia Syria Arabic +Luchou Taiwan Min +Lungtan Taiwan Min +Liberec Czech Republic Czech +Lviv Ukraine Ukrainian +Lugansk Ukraine Ukrainian +Lutsk Ukraine Ukrainian +Lysyt?ansk Ukraine Ukrainian +Lower Hutt New Zealand English +Lida Belarus Belorussian +Los Teques Venezuela Spanish +Lipetsk Russian Federation Russian +Ljubertsy Russian Federation Russian +Leninsk-Kuznetski Russian Federation Russian +Long Xuyen Vietnam Vietnamese +Los Angeles United States English +Las Vegas United States English +Long Beach United States English +Lexington-Fayette United States English +Louisville United States English +Lincoln United States English +Lubbock United States English +Little Rock United States English +Laredo United States English +Lakewood United States English +Lansing United States English +Lancaster United States English +Lafayette United States English +Lowell United States English +Livonia United States English +EXPLAIN +SELECT Name FROM City +WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND +City.Population > 100000; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join) +SELECT Name FROM City +WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND +City.Population > 100000; +Name +Vientiane +Riga +Daugavpils +Maseru +Beirut +Tripoli +Monrovia +Tripoli +Bengasi +Misrata +Vilnius +Kaunas +Klaipeda +?iauliai +Panevezys +set join_cache_level=4; +show variables like 'join_cache_level'; +Variable_name Value +join_cache_level 4 +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country +WHERE City.Country=Country.Code AND +Country.Name LIKE 'L%' AND City.Population > 100000; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join) +SELECT City.Name, Country.Name FROM City,Country +WHERE City.Country=Country.Code AND +Country.Name LIKE 'L%' AND City.Population > 100000; +Name Name +Vientiane Laos +Riga Latvia +Daugavpils Latvia +Maseru Lesotho +Beirut Lebanon +Tripoli Lebanon +Monrovia Liberia +Tripoli Libyan Arab Jamahiriya +Bengasi Libyan Arab Jamahiriya +Misrata Libyan Arab Jamahiriya +Vilnius Lithuania +Kaunas Lithuania +Klaipeda Lithuania +?iauliai Lithuania +Panevezys Lithuania +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language +FROM City,Country,CountryLanguage +WHERE City.Country=Country.Code AND +CountryLanguage.Country=Country.Code AND +City.Name LIKE 'L%' AND Country.Population > 3000000 AND +CountryLanguage.Percentage > 50; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using where; Using join buffer (incremental, BNLH join) +SELECT City.Name, Country.Name, CountryLanguage.Language +FROM City,Country,CountryLanguage +WHERE City.Country=Country.Code AND +CountryLanguage.Country=Country.Code AND +City.Name LIKE 'L%' AND Country.Population > 3000000 AND +CountryLanguage.Percentage > 50; +Name Name Language +Leiden Netherlands Dutch +La Matanza Argentina Spanish +Lomas de Zamora Argentina Spanish +La Plata Argentina Spanish +Lanús Argentina Spanish +Las Heras Argentina Spanish +La Rioja Argentina Spanish +Liège Belgium Dutch +La Paz Bolivia Spanish +Londrina Brazil Portuguese +Limeira Brazil Portuguese +Lages Brazil Portuguese +Luziânia Brazil Portuguese +Lauro de Freitas Brazil Portuguese +Linhares Brazil Portuguese +London United Kingdom English +Liverpool United Kingdom English +Leeds United Kingdom English +Leicester United Kingdom English +Luton United Kingdom English +Los Angeles Chile Spanish +La Serena Chile Spanish +La Romana Dominican Republic Spanish +Loja Ecuador Spanish +Luxor Egypt Arabic +Las Palmas de Gran Canaria Spain Spanish +L´Hospitalet de Llobregat Spain Spanish +Leganés Spain Spanish +León Spain Spanish +Logroño Spain Spanish +Lleida (Lérida) Spain Spanish +Le-Cap-Haïtien Haiti Haiti Creole +La Ceiba Honduras Spanish +Livorno Italy Italian +Latina Italy Italian +Lecce Italy Italian +La Spezia Italy Italian +Linz Austria German +London Canada English +Laval Canada English +Longueuil Canada English +Lanzhou China Chinese +Luoyang China Chinese +Liuzhou China Chinese +Liaoyang China Chinese +Liupanshui China Chinese +Liaoyuan China Chinese +Lianyungang China Chinese +Leshan China Chinese +Linyi China Chinese +Luzhou China Chinese +Laiwu China Chinese +Liaocheng China Chinese +Laizhou China Chinese +Linfen China Chinese +Liangcheng China Chinese +Longkou China Chinese +Langfang China Chinese +Liu´an China Chinese +Longjing China Chinese +Lengshuijiang China Chinese +Laiyang China Chinese +Longyan China Chinese +Linhe China Chinese +Leiyang China Chinese +Loudi China Chinese +Luohe China Chinese +Linqing China Chinese +Laohekou China Chinese +Linchuan China Chinese +Lhasa China Chinese +Lianyuan China Chinese +Liyang China Chinese +Liling China Chinese +Linhai China Chinese +Larisa Greece Greek +La Habana Cuba Spanish +Lilongwe Malawi Chichewa +León Mexico Spanish +La Paz Mexico Spanish +La Paz Mexico Spanish +Lázaro Cárdenas Mexico Spanish +Lagos de Moreno Mexico Spanish +Lerdo Mexico Spanish +Los Cabos Mexico Spanish +Lerma Mexico Spanish +Las Margaritas Mexico Spanish +Lashio (Lasho) Myanmar Burmese +Lalitapur Nepal Nepali +León Nicaragua Spanish +Lambaré Paraguay Spanish +Lima Peru Spanish +Lisboa Portugal Portuguese +Lódz Poland Polish +Lublin Poland Polish +Legnica Poland Polish +Lyon France French +Le Havre France French +Lille France French +Le Mans France French +Limoges France French +Linköping Sweden Swedish +Lund Sweden Swedish +Leipzig Germany German +Lübeck Germany German +Ludwigshafen am Rhein Germany German +Leverkusen Germany German +Lünen Germany German +Lahti Finland Finnish +Lausanne Switzerland German +Latakia Syria Arabic +Luchou Taiwan Min +Lungtan Taiwan Min +Liberec Czech Republic Czech +Lviv Ukraine Ukrainian +Lugansk Ukraine Ukrainian +Lutsk Ukraine Ukrainian +Lysyt?ansk Ukraine Ukrainian +Lower Hutt New Zealand English +Lida Belarus Belorussian +Los Teques Venezuela Spanish +Lipetsk Russian Federation Russian +Ljubertsy Russian Federation Russian +Leninsk-Kuznetski Russian Federation Russian +Long Xuyen Vietnam Vietnamese +Los Angeles United States English +Las Vegas United States English +Long Beach United States English +Lexington-Fayette United States English +Louisville United States English +Lincoln United States English +Lubbock United States English +Little Rock United States English +Laredo United States English +Lakewood United States English +Lansing United States English +Lancaster United States English +Lafayette United States English +Lowell United States English +Livonia United States English +EXPLAIN +SELECT Name FROM City +WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND +City.Population > 100000; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BNLH join) +SELECT Name FROM City +WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND +City.Population > 100000; +Name +Vientiane +Riga +Daugavpils +Maseru +Beirut +Tripoli +Monrovia +Tripoli +Bengasi +Misrata +Vilnius +Kaunas +Klaipeda +?iauliai +Panevezys set join_cache_level=5; show variables like 'join_cache_level'; Variable_name Value @@ -2101,7 +3120,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -2130,8 +3149,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where -1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer -1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKA join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (flat, BKA join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -2279,21 +3298,13 @@ Lancaster United States English Lafayette United States English Lowell United States English Livonia United States English -# !!!NB igor: after backporting the SJ code the following should return -# EXPLAIN -# SELECT Name FROM City -# WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND -# City.Population > 100000; -# id select_type table type possible_keys key key_len ref rows Extra -# 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -# 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join) SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; @@ -2323,7 +3334,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -2352,8 +3363,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where -1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer -1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKA join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (incremental, BKA join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -2501,21 +3512,13 @@ Lancaster United States English Lafayette United States English Lowell United States English Livonia United States English -# !!!NB igor: after backporting the SJ code the following should return -# EXPLAIN -# SELECT Name FROM City -# WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND -# City.Population > 100000; -# id select_type table type possible_keys key key_len ref rows Extra -# 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -# 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKA join) SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; @@ -2545,7 +3548,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -2574,8 +3577,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where -1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer -1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKAH join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (flat, BKAH join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -2723,21 +3726,13 @@ Lancaster United States English Lafayette United States English Lowell United States English Livonia United States English -# !!!NB igor: after backporting the SJ code the following should return -# EXPLAIN -# SELECT Name FROM City -# WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND -# City.Population > 100000; -# id select_type table type possible_keys key key_len ref rows Extra -# 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -# 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join) SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; @@ -2767,7 +3762,7 @@ WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 SIMPLE City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND Country.Name LIKE 'L%' AND City.Population > 100000; @@ -2796,8 +3791,8 @@ City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE CountryLanguage ALL PRIMARY,Percentage NULL NULL NULL 984 Using where -1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer -1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.CountryLanguage.Country 1 Using where; Using join buffer (flat, BKAH join) +1 SIMPLE City ref Country Country 3 world.Country.Code 18 Using index condition(BKA); Using where; Using join buffer (incremental, BKAH join) SELECT City.Name, Country.Name, CountryLanguage.Language FROM City,Country,CountryLanguage WHERE City.Country=Country.Code AND @@ -2945,21 +3940,13 @@ Lancaster United States English Lafayette United States English Lowell United States English Livonia United States English -# !!!NB igor: after backporting the SJ code the following should return -# EXPLAIN -# SELECT Name FROM City -# WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND -# City.Population > 100000; -# id select_type table type possible_keys key key_len ref rows Extra -# 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -# 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR -1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer (flat, BKAH join) SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; @@ -3038,62 +4025,62 @@ Ho Chi Minh City Vietnam New York United States Los Angeles United States set join_cache_level=8; -set join_buffer_size=256; +set join_buffer_size=384; EXPLAIN SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND City.Population > 3000000; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE City range Population,Country Population 4 NULL # Using index condition; Using MRR -1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.City.Country # Using join buffer +1 SIMPLE Country eq_ref PRIMARY PRIMARY 3 world.City.Country # Using join buffer (flat, BKAH join) SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND City.Population > 3000000; Name Name -Sydney Australia -Dhaka Bangladesh -Rio de Janeiro Brazil -São Paulo Brazil -London United Kingdom -Santiago de Chile Chile Alexandria Egypt +Ankara Turkey +Baghdad Iraq +Bangkok Thailand +Berlin Germany Cairo Egypt -Jakarta Indonesia -Delhi India Calcutta [Kolkata] India -Mumbai (Bombay) India +Chengdu China Chennai (Madras) India -Baghdad Iraq -Teheran Iran -Tokyo Japan -Jokohama [Yokohama] Japan -Peking China Chongqing China -Shanghai China -Wuhan China +Ciudad de México Mexico +Delhi India +Dhaka Bangladesh Harbin China -Shenyang China +Ho Chi Minh City Vietnam +Istanbul Turkey +Jakarta Indonesia +Jokohama [Yokohama] Japan Kanton [Guangzhou] China -Tianjin China -Chengdu China -Santafé de Bogotá Colombia -Kinshasa Congo, The Democratic Republic of the -Seoul South Korea -Pusan South Korea -Ciudad de México Mexico -Rangoon (Yangon) Myanmar Karachi Pakistan +Kinshasa Congo, The Democratic Republic of the Lahore Pakistan Lima Peru -Berlin Germany +London United Kingdom +Los Angeles United States +Moscow Russian Federation +Mumbai (Bombay) India +New York United States +Peking China +Pusan South Korea +Rangoon (Yangon) Myanmar +Rio de Janeiro Brazil Riyadh Saudi Arabia +Santafé de Bogotá Colombia +Santiago de Chile Chile +Seoul South Korea +Shanghai China +Shenyang China Singapore Singapore -Bangkok Thailand -Ankara Turkey -Istanbul Turkey St Petersburg Russian Federation -Moscow Russian Federation -Ho Chi Minh City Vietnam -Los Angeles United States -New York United States +Sydney Australia +São Paulo Brazil +Teheran Iran +Tianjin China +Tokyo Japan +Wuhan China set join_buffer_size=default; set join_cache_level=6; ALTER TABLE Country MODIFY Name varchar(52) NOT NULL default ''; @@ -3333,15 +4320,15 @@ t1.metaid = t2.metaid AND t1.affiliateid = '2'; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t6 system PRIMARY NULL NULL NULL 1 1 SIMPLE t1 ref t1_affiliateid,t1_metaid t1_affiliateid 4 const 1 -1 SIMPLE t4 ref PRIMARY,t4_formatclassid,t4_formats_idx t4_formats_idx 1 const 1 Using index condition; Using where; Using join buffer -1 SIMPLE t5 eq_ref PRIMARY,t5_formattypeid PRIMARY 4 test.t4.formatclassid 1 Using where; Using join buffer -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.metaid 1 Using join buffer +1 SIMPLE t4 ref PRIMARY,t4_formatclassid,t4_formats_idx t4_formats_idx 1 const 1 Using index condition; Using where; Using join buffer (flat, BKA join) +1 SIMPLE t5 eq_ref PRIMARY,t5_formattypeid PRIMARY 4 test.t4.formatclassid 1 Using where; Using join buffer (incremental, BKA join) +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.metaid 1 Using join buffer (incremental, BKA join) 1 SIMPLE t7 ref PRIMARY PRIMARY 4 test.t1.metaid 1 Using index -1 SIMPLE t3 ref t3_metaid,t3_formatid,t3_metaidformatid t3_metaid 4 test.t1.metaid 2 Using where; Using join buffer -1 SIMPLE t8 eq_ref PRIMARY PRIMARY 4 test.t7.artistid 1 Using join buffer -1 SIMPLE t9 index PRIMARY,t9_subgenreid,t9_metaid PRIMARY 8 NULL 2 Using where; Using index; Using join buffer -1 SIMPLE t10 eq_ref PRIMARY,t10_genreid PRIMARY 4 test.t9.subgenreid 1 Using join buffer -1 SIMPLE t11 eq_ref PRIMARY PRIMARY 4 test.t10.genreid 1 Using join buffer +1 SIMPLE t3 ref t3_metaid,t3_formatid,t3_metaidformatid t3_metaid 4 test.t1.metaid 2 Using where; Using join buffer (flat, BKA join) +1 SIMPLE t8 eq_ref PRIMARY PRIMARY 4 test.t7.artistid 1 Using join buffer (incremental, BKA join) +1 SIMPLE t9 index PRIMARY,t9_subgenreid,t9_metaid PRIMARY 8 NULL 2 Using where; Using index; Using join buffer (incremental, BNL join) +1 SIMPLE t10 eq_ref PRIMARY,t10_genreid PRIMARY 4 test.t9.subgenreid 1 Using join buffer (incremental, BKA join) +1 SIMPLE t11 eq_ref PRIMARY PRIMARY 4 test.t10.genreid 1 Using join buffer (incremental, BKA join) SELECT t1.uniquekey, t1.xml AS affiliateXml, t8.name AS artistName, t8.artistid, t11.name AS genreName, t11.genreid, t11.priority AS genrePriority, @@ -3392,7 +4379,7 @@ SELECT a1<>a2, a1, a2, b2, b3, c3, SUBSTR(filler1,1,1) AS s1, SUBSTR(filler2,1,1) AS s2 FROM t1,t2,t3 WHERE a1=a2 AND b2=b3 AND MOD(c3,10)>7; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 9 +1 SIMPLE t1 ALL NULL NULL NULL NULL 9 Using where 1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.a1 1 Using index 1 SIMPLE t3 ref idx idx 5 test.t2.b2 5 Using where SELECT a1<>a2, a1, a2, b2, b3, c3, @@ -3420,9 +4407,9 @@ SELECT a1<>a2, a1, a2, b2, b3, c3, SUBSTR(filler1,1,1) AS s1, SUBSTR(filler2,1,1) AS s2 FROM t1,t2,t3 WHERE a1=a2 AND b2=b3 AND MOD(c3,10)>7; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 9 +1 SIMPLE t1 ALL NULL NULL NULL NULL 9 Using where 1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.a1 1 Using index -1 SIMPLE t3 ref idx idx 5 test.t2.b2 5 Using where; Using join buffer +1 SIMPLE t3 ref idx idx 5 test.t2.b2 5 Using where; Using join buffer (flat, BKA join) SELECT a1<>a2, a1, a2, b2, b3, c3, SUBSTR(filler1,1,1) AS s1, SUBSTR(filler2,1,1) AS s2 FROM t1,t2,t3 WHERE a1=a2 AND b2=b3 AND MOD(c3,10)>7; @@ -3454,7 +4441,7 @@ set join_cache_level=8; EXPLAIN SELECT * FROM t1,t2 WHERE t1.a=t2.a AND t1.b >= 30; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL idx NULL NULL NULL 7 Using where -1 SIMPLE t2 ref idx idx 5 test.t1.a 2 Using join buffer +1 SIMPLE t2 ref idx idx 5 test.t1.a 2 Using join buffer (flat, BKAH join) SELECT * FROM t1,t2 WHERE t1.a=t2.a AND t1.b >= 30; a b a b 7 40 7 10 @@ -3487,7 +4474,7 @@ EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t2.b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 -1 SIMPLE t2 ref i_a i_a 4 test.t1.a 2 Using where; Not exists; Using join buffer +1 SIMPLE t2 ref i_a i_a 4 test.t1.a 2 Using where; Not exists; Using join buffer (flat, BKA join) SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t2.b IS NULL; a a b 3 NULL NULL @@ -3514,7 +4501,7 @@ select t1.a, count(t2.p) as count from t1 left join t2 on t1.a=t2.a and t2.p % 2 = 1 group by t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 8 Using temporary; Using filesort -1 SIMPLE t2 ref i_a i_a 5 test.t1.a 2 Using where; Using join buffer +1 SIMPLE t2 ref i_a i_a 5 test.t1.a 2 Using where; Using join buffer (flat, BKA join) select t1.a, count(t2.p) as count from t1 left join t2 on t1.a=t2.a and t2.p % 2 = 1 group by t1.a; a count @@ -3566,7 +4553,7 @@ a b a c explain select * from t1 left join t2 on t1.a=t2.a where t2.c=102 or t2.c is null; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) select * from t1 left join t2 on t1.a=t2.a where t2.c=102 or t2.c is null; a b a c 3 30 3 102 @@ -3589,11 +4576,11 @@ a b explain select * from t1 left join t2 on (1=0) where a=40; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) select * from t1 left join t2 on (1=0) where a=40; a b 40 NULL -set join_cache_level=1; +set join_cache_level=0; explain select * from t1 left join t2 on (1=0); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 @@ -3632,8 +4619,8 @@ set join_cache_level=6; set join_buffer_size=1024; EXPLAIN SELECT AVG(c) FROM t1,t2 WHERE t1.a=t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 2050 -1 SIMPLE t2 ref idx idx 5 test.t1.a 640 Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 2050 Using where +1 SIMPLE t2 ref idx idx 5 test.t1.a 640 Using join buffer (flat, BKA join) SELECT AVG(c) FROM t1,t2 WHERE t1.a=t2.b; AVG(c) 5.0000 @@ -3673,8 +4660,8 @@ WHERE t1.a=t2.a AND t2.a=t3.a AND t1.b IS NULL AND t2.b IS NULL AND t3.b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 16384 Using where -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer -1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer (flat, BKAH join) +1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer (flat, BKAH join) SELECT COUNT(*) FROM t1,t2,t3 WHERE t1.a=t2.a AND t2.a=t3.a AND t1.b IS NULL AND t2.b IS NULL AND t3.b IS NULL; @@ -3714,6 +4701,7 @@ INSERT INTO t3(a,b) VALUES (4,30), (4,40), (4,50), (4,60), (4,70), (4,80), (5,30), (5,40), (5,50), (5,60), (5,70), (5,80), (7,30), (7,40), (7,50), (7,60), (7,70), (7,80); +set join_cache_level=0; SELECT t1.a, t2.a, t3.a, t2.b, t3.b, t3.val FROM (t1,t2) LEFT JOIN t3 ON (t1.a=t3.a AND t2.b=t3.b) WHERE t1.a=t2.a; @@ -3738,7 +4726,7 @@ WHERE t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index PRIMARY PRIMARY 8 NULL 2 Using index 1 SIMPLE t2 ref PRIMARY PRIMARY 8 test.t1.a 1 Using index -1 SIMPLE t3 ref idx idx 16 test.t1.a,test.t2.b 2 Using join buffer +1 SIMPLE t3 ref idx idx 16 test.t1.a,test.t2.b 2 Using join buffer (flat, BKA join) SELECT t1.a, t2.a, t3.a, t2.b, t3.b, t3.val FROM (t1,t2) LEFT JOIN t3 ON (t1.a=t3.a AND t2.b=t3.b) WHERE t1.a=t2.a; @@ -3755,7 +4743,7 @@ a a a b b val 2 2 2 70 70 0 2 2 2 80 80 0 DROP INDEX idx ON t3; -set join_cache_level=4; +set join_cache_level=2; EXPLAIN SELECT t1.a, t2.a, t3.a, t2.b, t3.b, t3.val FROM (t1,t2) LEFT JOIN t3 ON (t1.a=t3.a AND t2.b=t3.b) @@ -3763,7 +4751,7 @@ WHERE t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index PRIMARY PRIMARY 8 NULL 2 Using index 1 SIMPLE t2 ref PRIMARY PRIMARY 8 test.t1.a 1 Using index -1 SIMPLE t3 ALL NULL NULL NULL NULL 24 Using where; Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 24 Using where; Using join buffer (flat, BNL join) SELECT t1.a, t2.a, t3.a, t2.b, t3.b, t3.val FROM (t1,t2) LEFT JOIN t3 ON (t1.a=t3.a AND t2.b=t3.b) WHERE t1.a=t2.a; @@ -3808,8 +4796,8 @@ f1 f2 f3 explain select t2.f1, t2.f2, t2.f3 from t1,t2 where t1.f1=t2.f1 and t2.f2 between t1.f1 and t2.f2; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using join buffer (flat, BKA join) set join_cache_level=6; select t2.f1, t2.f2, t2.f3 from t1,t2 where t1.f1=t2.f1 and t2.f2 between t1.f1 and t1.f2 and t2.f2 + 1 >= t1.f1 + 1; @@ -3821,8 +4809,8 @@ f1 f2 f3 explain select t2.f1, t2.f2, t2.f3 from t1,t2 where t1.f1=t2.f1 and t2.f2 between t1.f1 and t2.f2; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using join buffer (flat, BKA join) set join_cache_level=7; select t2.f1, t2.f2, t2.f3 from t1,t2 where t1.f1=t2.f1 and t2.f2 between t1.f1 and t1.f2 and t2.f2 + 1 >= t1.f1 + 1; @@ -3834,8 +4822,8 @@ f1 f2 f3 explain select t2.f1, t2.f2, t2.f3 from t1,t2 where t1.f1=t2.f1 and t2.f2 between t1.f1 and t2.f2; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using where; Using join buffer (flat, BKAH join) set join_cache_level=8; select t2.f1, t2.f2, t2.f3 from t1,t2 where t1.f1=t2.f1 and t2.f2 between t1.f1 and t1.f2 and t2.f2 + 1 >= t1.f1 + 1; @@ -3847,8 +4835,8 @@ f1 f2 f3 explain select t2.f1, t2.f2, t2.f3 from t1,t2 where t1.f1=t2.f1 and t2.f2 between t1.f1 and t2.f2; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t2 ref f1 f1 4 test.t1.f1 3 Using index condition(BKA); Using where; Using join buffer (flat, BKAH join) drop table t1,t2; set join_cache_level=default; # @@ -3866,8 +4854,8 @@ explain select t1.id1, sum(t2.id2) from t1 join t2 on t1.id1=t2.id1 where t1.d=3 group by t1.id1; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ref idx1 idx1 5 const 4 Using index; Using temporary; Using filesort -1 SIMPLE t2 ref idx2 idx2 5 test.t1.id1 2 Using join buffer +1 SIMPLE t1 ref idx1 idx1 5 const 4 Using where; Using index; Using temporary; Using filesort +1 SIMPLE t2 ref idx2 idx2 5 test.t1.id1 2 Using join buffer (flat, BKA join) select t1.id1, sum(t2.id2) from t1 join t2 on t1.id1=t2.id1 where t1.d=3 group by t1.id1; id1 sum(t2.id2) @@ -3878,8 +4866,8 @@ explain select t1.id1 from t1 join t2 on t1.id1=t2.id1 where t1.d=3 and t2.id2 > 200 order by t1.id1; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ref idx1 idx1 5 const 4 Using index; Using temporary; Using filesort -1 SIMPLE t2 ref idx2 idx2 5 test.t1.id1 2 Using where; Using join buffer +1 SIMPLE t1 ref idx1 idx1 5 const 4 Using where; Using index; Using temporary; Using filesort +1 SIMPLE t2 ref idx2 idx2 5 test.t1.id1 2 Using where; Using join buffer (flat, BKA join) select t1.id1 from t1 join t2 on t1.id1=t2.id1 where t1.d=3 and t2.id2 > 200 order by t1.id1; id1 @@ -3922,7 +4910,7 @@ explain select t1.a, t1.b, t1.c, t1.d, t2.e, t3.f, t4.g from t1,t2,t3,t4 where t2.b=t1.b and t3.d=t1.d and t4.c=t1.c; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 7 +1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where 1 SIMPLE t2 ref idx idx 5 test.t1.b 1 1 SIMPLE t3 ref idx idx 5 test.t1.d 1 1 SIMPLE t4 ref idx idx 5 test.t1.c 1 @@ -3935,10 +4923,10 @@ explain select t1.a, t1.b, t1.c, t1.d, t2.e, t3.f, t4.g from t1,t2,t3,t4 where t2.b=t1.b and t3.d=t1.d and t4.c=t1.c; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 7 -1 SIMPLE t2 ref idx idx 5 test.t1.b 1 Using join buffer -1 SIMPLE t3 ref idx idx 5 test.t1.d 1 Using join buffer -1 SIMPLE t4 ref idx idx 5 test.t1.c 1 Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 7 Using where +1 SIMPLE t2 ref idx idx 5 test.t1.b 1 Using join buffer (flat, BKA join) +1 SIMPLE t3 ref idx idx 5 test.t1.d 1 Using join buffer (incremental, BKA join) +1 SIMPLE t4 ref idx idx 5 test.t1.c 1 Using join buffer (incremental, BKA join) select t1.a, t1.b, t1.c, t1.d, t2.e, t3.f, t4.g from t1,t2,t3,t4 where t2.b=t1.b and t3.d=t1.d and t4.c=t1.c; a b c d e f g @@ -3986,20 +4974,20 @@ FROM t1 JOIN t2 JOIN t3 JOIN t4 JOIN t5 WHERE t1.id1=t5.id1 AND t1.id2=t5.id2 and t4.id2=t1.id2 AND t5.enum2='Active' AND t3.id4=t2.id4 AND t2.id3=t1.id3 AND t3.text1<'D'; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 349 -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 test.t1.id3 1 Using join buffer -1 SIMPLE t3 eq_ref PRIMARY PRIMARY 8 test.t2.id4 1 Using where; Using join buffer -1 SIMPLE t4 eq_ref PRIMARY PRIMARY 8 test.t1.id2 1 Using join buffer -1 SIMPLE t5 eq_ref PRIMARY PRIMARY 16 test.t1.id1,test.t1.id2 1 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 349 Using where +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 test.t1.id3 1 Using where; Using join buffer (flat, BKAH join) +1 SIMPLE t3 eq_ref PRIMARY PRIMARY 8 test.t2.id4 1 Using where; Using join buffer (incremental, BKAH join) +1 SIMPLE t4 eq_ref PRIMARY PRIMARY 8 test.t1.id2 1 Using join buffer (incremental, BKAH join) +1 SIMPLE t5 eq_ref PRIMARY PRIMARY 16 test.t1.id1,test.t1.id2 1 Using where; Using join buffer (incremental, BKAH join) SELECT STRAIGHT_JOIN t1.id1, t1.num3, t3.text1, t3.id4, t2.id3, t4.dummy FROM t1 JOIN t2 JOIN t3 JOIN t4 JOIN t5 WHERE t1.id1=t5.id1 AND t1.id2=t5.id2 and t4.id2=t1.id2 AND t5.enum2='Active' AND t3.id4=t2.id4 AND t2.id3=t1.id3 AND t3.text1<'D'; id1 num3 text1 id4 id3 dummy 228172702 14 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 2567095402 2667134182 0 +228172702 134 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 2567095402 2667134182 0 228172702 15 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 2567095402 2667134182 0 228172702 3 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 2567095402 2667134182 0 -228172702 134 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 2567095402 2667134182 0 228808822 61 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 228808822 13 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 228808822 60 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 @@ -4007,17 +4995,17 @@ id1 num3 text1 id4 id3 dummy 228808822 3 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 228808822 4 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 228808822 6 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 -228808822 17 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 -228808822 50 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 228808822 18 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 228808822 1 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 228808822 3 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 +228808822 17 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 +228808822 50 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 228808822 4 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 826928662 935693782 0 228808822 89 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 2381969632 2482416112 0 228808822 19 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 2381969632 2482416112 0 +228808822 9 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 2381969632 2482416112 0 228808822 84 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 2381969632 2482416112 0 228808822 14 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 2381969632 2482416112 0 -228808822 9 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 2381969632 2482416112 0 228808822 1 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 2381969632 2482416112 0 228808822 10 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 2381969632 2482416112 0 228808822 26 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC 2381969632 2482416112 0 @@ -4087,7 +5075,7 @@ FROM t1 STRAIGHT_JOIN t2 ORDER BY t1.int_key; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL int_key 4 NULL 14 Using index -1 SIMPLE t2 index NULL int_key 4 NULL 2 Using index; Using join buffer +1 SIMPLE t2 index NULL int_key 4 NULL 2 Using index; Using join buffer (flat, BNL join) DROP TABLE t1,t2; SET join_cache_level=default; @@ -4121,7 +5109,7 @@ FROM t1 JOIN t2 ON t2.v ORDER BY t2.v; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where -1 SIMPLE t1 index NULL PRIMARY 4 NULL 4 Using index; Using join buffer +1 SIMPLE t1 index NULL PRIMARY 4 NULL 4 Using index; Using join buffer (flat, BNL join) DROP TABLE t1,t2; # @@ -4155,8 +5143,8 @@ insert into t3 values (1,1),(2,2); explain select t1.* from t1,t2,t3; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 -1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join) select t1.* from t1,t2,t3; a b 1 1 @@ -4171,8 +5159,8 @@ set join_cache_level=2; explain select t1.* from t1,t2,t3; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 -1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using join buffer (incremental, BNL join) select t1.* from t1,t2,t3; a b 1 1 @@ -4185,3 +5173,373 @@ a b 2 2 set join_cache_level=default; drop table t1,t2,t3; +# +# Bug #52394: using join buffer for 3 table join with ref access +# LP #623209: and no references to the columns of the middle table +# +set join_cache_level=6; +CREATE TABLE t1 (a int(11), b varchar(1)); +INSERT INTO t1 VALUES (6,'r'),(27,'o'); +CREATE TABLE t2(a int); +INSERT INTO t2 VALUES(1),(2),(3),(4),(5); +CREATE TABLE t3 (a int(11) primary key, b varchar(1)); +INSERT INTO t3 VALUES +(14,'d'),(15,'z'),(16,'e'),(17,'h'),(18,'b'),(19,'s'),(20,'e'), +(21,'j'),(22,'e'),(23,'f'),(24,'v'),(25,'x'),(26,'m'),(27,'o'); +EXPLAIN +SELECT t3.a FROM t1,t2,t3 WHERE t1.a = t3.a AND t1.b = t3.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join) +1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer (incremental, BKA join) +SELECT t3.a FROM t1,t2,t3 WHERE t1.a = t3.a AND t1.b = t3.b; +a +27 +27 +27 +27 +27 +DROP TABLE t1,t2,t3; +set join_cache_level=default; +# +# Bug #51084: Batched key access crashes for SELECT with +# derived table and LEFT JOIN +# +CREATE TABLE t1 ( +carrier int, +id int PRIMARY KEY +); +INSERT INTO t1 VALUES (1,11),(1,12),(2,13); +CREATE TABLE t2 ( +scan_date int, +package_id int +); +INSERT INTO t2 VALUES (2008,21),(2008,22); +CREATE TABLE t3 ( +carrier int PRIMARY KEY, +id int +); +INSERT INTO t3 VALUES (1,31); +CREATE TABLE t4 ( +carrier_id int, +INDEX carrier_id(carrier_id) +); +INSERT INTO t4 VALUES (31),(32); +SET join_cache_level=8; +SELECT COUNT(*) +FROM (t2 JOIN t1) LEFT JOIN (t3 JOIN t4 ON t3.id = t4.carrier_id) +ON t3.carrier = t1.carrier; +COUNT(*) +6 +EXPLAIN +SELECT COUNT(*) +FROM (t2 JOIN t1) LEFT JOIN (t3 JOIN t4 ON t3.id = t4.carrier_id) +ON t3.carrier = t1.carrier; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.carrier 1 Using where +1 SIMPLE t4 ref carrier_id carrier_id 5 test.t3.id 2 Using index +SET join_cache_level=default; +DROP TABLE t1,t2,t3,t4; +# +# Bug #52636: allowing JOINs on NULL values w/ join_cache_level = 5-8 +# +CREATE TABLE t1 (b int); +INSERT INTO t1 VALUES (NULL),(3); +CREATE TABLE t2 (a int, b int, KEY (b)); +INSERT INTO t2 VALUES (100,NULL),(150,200); +set join_cache_level = 5; +explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer (flat, BKA join) +SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +a +NULL +NULL +set join_cache_level = 8; +explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer (flat, BKAH join) +SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +a +NULL +NULL +delete from t1; +INSERT INTO t1 VALUES (NULL),(NULL); +set join_cache_level = 5; +explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer (flat, BKA join) +SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +a +NULL +NULL +DROP TABLE t1,t2; +CREATE TABLE t1 (b varchar(100)); +INSERT INTO t1 VALUES (NULL),("some varchar"); +CREATE TABLE t2 (a int, b varchar(100), KEY (b)); +INSERT INTO t2 VALUES (100,NULL),(150,"varchar"),(200,NULL),(250,"long long varchar"); +set join_cache_level = 5; +explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ref b b 103 test.t1.b 2 Using where; Using join buffer (flat, BKA join) +SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +a +NULL +NULL +set join_cache_level = 8; +explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ref b b 103 test.t1.b 2 Using where; Using join buffer (flat, BKAH join) +SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +a +NULL +NULL +set join_cache_level = default; +DROP TABLE t1,t2; +# +# Bug #54359: Extra rows with join_cache_level=7,8 and two joins +# and multi-column index" +# +CREATE TABLE t1 ( +pk int NOT NULL, +a int DEFAULT NULL, +b varchar(16) DEFAULT NULL, +c varchar(16) DEFAULT NULL, +INDEX idx (b,a)) +; +INSERT INTO t1 VALUES (4,9,'k','k'); +INSERT INTO t1 VALUES (12,5,'k','k'); +set join_cache_level = 8; +EXPLAIN +SELECT t.a FROM t1 t, t1 s FORCE INDEX(idx) +WHERE s.pk AND s.a >= t.pk AND s.b = t.c; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t ALL NULL NULL NULL NULL 2 Using where +1 SIMPLE s ref idx idx 19 test.t.c 1 Using index condition(BKA); Using where; Using join buffer (flat, BKAH join) +SELECT t.a FROM t1 t, t1 s FORCE INDEX(idx) +WHERE s.pk AND s.a >= t.pk AND s.b = t.c; +a +9 +9 +set join_cache_level = default; +DROP TABLE t1; +# +# Bug #54235: Extra rows with join_cache_level=6,8 and two LEFT JOINs +# +CREATE TABLE t1 (a int); +CREATE TABLE t2 (a int); +CREATE TABLE t3 (a int); +CREATE TABLE t4 (a int); +INSERT INTO t1 VALUES (null), (2), (null), (1); +set join_cache_level = 6; +EXPLAIN +SELECT t1.a +FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t2.a) ON 0 +WHERE t1.a OR t3.a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 4 +1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join) +SELECT t1.a +FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t2.a) ON 0 +WHERE t1.a OR t3.a; +a +2 +1 +EXPLAIN +SELECT t1.a +FROM t1 LEFT JOIN (t2 LEFT JOIN (t3 LEFT JOIN t4 ON 1) ON t2.a) ON 0 +WHERE t1.a OR t4.a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 4 +1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join) +SELECT t1.a +FROM t1 LEFT JOIN (t2 LEFT JOIN (t3 LEFT JOIN t4 ON 1) ON t2.a) ON 0 +WHERE t1.a OR t4.a; +a +2 +1 +set join_cache_level = default; +DROP TABLE t1,t2,t3,t4; +# +# Bug #663840: Memory overwrite causing crash with hash join +# +SET SESSION join_cache_level=3; +SET SESSION join_buffer_size=100; +Warnings: +Warning 1292 Truncated incorrect join_buffer_size value: '100' +CREATE TABLE t3 ( +i int NOT NULL, +j int NOT NULL, +d date NOT NULL, +t time NOT NULL, +v varchar(1) NOT NULL, +u varchar(1) NOT NULL, +INDEX idx (v) +) COLLATE=latin1_bin; +INSERT INTO t3 VALUES +(3,8,'2008-12-04','00:00:00','v','v'), (3,8,'2009-03-28','00:00:00','f','f'), +(3,5,'1900-01-01','00:55:47','v','v'), (2,8,'2009-10-02','00:00:00','s','s'), +(1,8,'1900-01-01','20:51:59','a','a'), (0,6,'2008-06-04','09:47:27','p','p'), +(8,7,'2009-01-13','21:58:29','z','z'), (5,2,'1900-01-01','22:45:53','a','a'), +(9,5,'2008-01-28','14:06:48','h','h'), (5,7,'2004-09-18','22:17:16','h','h'), +(4,2,'2006-10-14','14:59:37','v','v'), (2,9,'1900-01-01','23:37:40','v','v'), +(33,142,'2000-11-28','14:14:01','b','b'), (5,3,'2008-04-04','02:54:19','y','y'), +(1,0,'2002-07-13','06:34:26','v','v'), (9,3,'2003-01-03','18:07:38','m','m'), +(1,5,'2006-04-02','13:55:23','z','z'), (3,9,'2006-10-19','20:32:28','n','n'), +(8,1,'2005-06-08','11:57:44','d','d'), (231,107,'2006-12-26','03:10:35','a','a'); +CREATE TABLE t1 SELECT * FROM t3; +DELETE FROM t1 WHERE i > 8; +CREATE TABLE t2 SELECT * FROM t3; +DELETE FROM t2 WHERE j > 10; +EXPLAIN +SELECT t1.i, t1.d, t1.v, t2.i, t2.d, t2.t, t2.v FROM t1,t2,t3 +WHERE t3.u <='a' AND t2.j < 5 AND t3.v = t2.u; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 16 +1 SIMPLE t2 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t3 ref idx idx 3 test.t2.u 2 Using where; Using join buffer (flat, BNLH join) +SELECT t1.i, t1.d, t1.v, t2.i, t2.d, t2.t, t2.v FROM t1,t2,t3 +WHERE t3.u <='a' AND t2.j < 5 AND t3.v = t2.u; +i d v i d t v +0 2008-06-04 p 5 1900-01-01 22:45:53 a +0 2008-06-04 p 5 1900-01-01 22:45:53 a +0 2008-06-04 p 5 1900-01-01 22:45:53 a +1 1900-01-01 a 5 1900-01-01 22:45:53 a +1 1900-01-01 a 5 1900-01-01 22:45:53 a +1 1900-01-01 a 5 1900-01-01 22:45:53 a +1 2002-07-13 v 5 1900-01-01 22:45:53 a +1 2002-07-13 v 5 1900-01-01 22:45:53 a +1 2002-07-13 v 5 1900-01-01 22:45:53 a +1 2006-04-02 z 5 1900-01-01 22:45:53 a +1 2006-04-02 z 5 1900-01-01 22:45:53 a +1 2006-04-02 z 5 1900-01-01 22:45:53 a +2 1900-01-01 v 5 1900-01-01 22:45:53 a +2 1900-01-01 v 5 1900-01-01 22:45:53 a +2 1900-01-01 v 5 1900-01-01 22:45:53 a +2 2009-10-02 s 5 1900-01-01 22:45:53 a +2 2009-10-02 s 5 1900-01-01 22:45:53 a +2 2009-10-02 s 5 1900-01-01 22:45:53 a +3 1900-01-01 v 5 1900-01-01 22:45:53 a +3 1900-01-01 v 5 1900-01-01 22:45:53 a +3 1900-01-01 v 5 1900-01-01 22:45:53 a +3 2006-10-19 n 5 1900-01-01 22:45:53 a +3 2006-10-19 n 5 1900-01-01 22:45:53 a +3 2006-10-19 n 5 1900-01-01 22:45:53 a +3 2008-12-04 v 5 1900-01-01 22:45:53 a +3 2008-12-04 v 5 1900-01-01 22:45:53 a +3 2008-12-04 v 5 1900-01-01 22:45:53 a +3 2009-03-28 f 5 1900-01-01 22:45:53 a +3 2009-03-28 f 5 1900-01-01 22:45:53 a +3 2009-03-28 f 5 1900-01-01 22:45:53 a +4 2006-10-14 v 5 1900-01-01 22:45:53 a +4 2006-10-14 v 5 1900-01-01 22:45:53 a +4 2006-10-14 v 5 1900-01-01 22:45:53 a +5 1900-01-01 a 5 1900-01-01 22:45:53 a +5 1900-01-01 a 5 1900-01-01 22:45:53 a +5 1900-01-01 a 5 1900-01-01 22:45:53 a +5 2004-09-18 h 5 1900-01-01 22:45:53 a +5 2004-09-18 h 5 1900-01-01 22:45:53 a +5 2004-09-18 h 5 1900-01-01 22:45:53 a +5 2008-04-04 y 5 1900-01-01 22:45:53 a +5 2008-04-04 y 5 1900-01-01 22:45:53 a +5 2008-04-04 y 5 1900-01-01 22:45:53 a +8 2005-06-08 d 5 1900-01-01 22:45:53 a +8 2005-06-08 d 5 1900-01-01 22:45:53 a +8 2005-06-08 d 5 1900-01-01 22:45:53 a +8 2009-01-13 z 5 1900-01-01 22:45:53 a +8 2009-01-13 z 5 1900-01-01 22:45:53 a +8 2009-01-13 z 5 1900-01-01 22:45:53 a +DROP TABLE t1,t2,t3; +SET SESSION join_cache_level=DEFAULT; +SET SESSION join_buffer_size=DEFAULT; +# +# Bug #664508: 'Simple' GROUP BY + ORDER BY +# when join buffers are used +# +CREATE TABLE t1 ( +pk int NOT NULL, i int NOT NULL, v varchar(1) NOT NULL, +PRIMARY KEY (pk), INDEX idx1(i), INDEX idx2 (v,i) +); +INSERT INTO t1 VALUES +(10,8,'v'), (11,8,'f'), (12,5,'v'), (13,8,'s'), (14,8,'a'), +(15,6,'p'), (16,7,'z'), (17,2,'a'), (18,5,'h'), (19,7,'h'), +(25,3,'m'), (26,5,'z'), (27,9,'n'), (28,1,'d'), (29,107,'a'); +CREATE TABLE t2 ( +pk int NOT NULL, i int NOT NULL, v varchar(1) NOT NULL, +PRIMARY KEY (pk), INDEX idx1(i), INDEX idx2(v,i) +); +INSERT INTO t2 VALUES +(10,8,'v'), (11,8,'f'), (12,5,'v'), (13,8,'s'), (14,8,'a'), +(15,6,'p'), (16,7,'z'), (17,2,'a'), (18,5,'h'), (19,7,'h'), +(20,2,'v'), (21,9,'v'), (22,142,'b'), (23,3,'y'), (24,0,'v'), +(25,3,'m'), (26,5,'z'), (27,9,'n'), (28,1,'d'), (29,107,'a'); +CREATE TABLE t3 ( +pk int NOT NULL, i int(11) NOT NULL, v varchar(1) NOT NULL, +PRIMARY KEY (pk), INDEX idx1(i), INDEX idx2(v,i) +); +INSERT INTO t3 VALUES +(1,9,'x'), (2,5,'g'), (3,1,'o'), (4,0,'g'), (5,1,'v'), +(6,190,'m'), (7,6,'x'), (8,3,'c'), (9,4,'z'), (10,3,'i'), +(11,186,'x'), (12,1,'g'), (13,8,'q'), (14,226,'m'), (15,133,'p'), +(16,6,'e'), (17,3,'t'), (18,8,'j'), (19,5,'h'), (20,7,'w'); +SET SESSION join_cache_level=1; +EXPLAIN +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v +GROUP BY t2.v ORDER BY t1.pk,t2.v; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 index idx1 idx2 7 NULL 10 Using index; Using temporary; Using filesort +1 SIMPLE t3 eq_ref PRIMARY,idx2 PRIMARY 4 test.t2.i 1 Using where +1 SIMPLE t1 ref idx2 idx2 3 test.t3.v 2 +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v +GROUP BY t2.v ORDER BY t1.pk,t2.v; +v +h +z +p +n +v +SET SESSION join_cache_level=6; +EXPLAIN +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v +GROUP BY t2.v ORDER BY t1.pk,t2.v; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL idx1 NULL NULL NULL 20 Using temporary; Using filesort +1 SIMPLE t3 eq_ref PRIMARY,idx2 PRIMARY 4 test.t2.i 1 Using where; Using join buffer (flat, BKA join) +1 SIMPLE t1 ref idx2 idx2 3 test.t3.v 2 Using join buffer (incremental, BKA join) +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v +GROUP BY t2.v ORDER BY t1.pk,t2.v; +v +h +z +n +v +p +SET SESSION join_cache_level=4; +EXPLAIN +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v +GROUP BY t2.v ORDER BY t1.pk,t2.v; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL idx1 NULL NULL NULL 20 Using temporary; Using filesort +1 SIMPLE t3 eq_ref PRIMARY,idx2 PRIMARY 4 test.t2.i 1 Using where; Using join buffer (flat, BNLH join) +1 SIMPLE t1 ref idx2 idx2 3 test.t3.v 2 Using join buffer (incremental, BNLH join) +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v +GROUP BY t2.v ORDER BY t1.pk,t2.v; +v +h +z +n +v +p +DROP TABLE t1,t2,t3; +SET SESSION join_cache_level=DEFAULT; +set @@optimizer_switch=@save_optimizer_switch; diff --git a/mysql-test/r/join_nested.result b/mysql-test/r/join_nested.result index 9d6fdd11c4b..373472f73ce 100644 --- a/mysql-test/r/join_nested.result +++ b/mysql-test/r/join_nested.result @@ -229,7 +229,7 @@ t8 ON t7.b=t8.b AND t6.b < 10; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 -1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join) 1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t8`.`b` = `test`.`t7`.`b`))) where 1 @@ -544,7 +544,7 @@ t0.b=t1.b AND (t2.a >= 4 OR t2.c IS NULL); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where @@ -639,7 +639,7 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where @@ -647,7 +647,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) SELECT t9.a,t9.b @@ -836,7 +836,7 @@ ON t3.a=1 AND t2.b=t4.b WHERE t1.a <= 2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: @@ -850,11 +850,11 @@ LEFT JOIN ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 -1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) 1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Warnings: -Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(((`test`.`t3`.`a` = 1) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`)))) where 1 +Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on((((`test`.`t3`.`a` = 1) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`))) and (`test`.`t3`.`b` is not null))) where 1 SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b FROM (t3,t4) LEFT JOIN @@ -906,7 +906,7 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where @@ -914,7 +914,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t4(b); @@ -956,7 +956,7 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where @@ -964,9 +964,9 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t8(b); EXPLAIN EXTENDED SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, @@ -1005,7 +1005,7 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where @@ -1013,9 +1013,9 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t1(b); CREATE INDEX idx_a ON t0(a); EXPLAIN EXTENDED @@ -1054,7 +1054,7 @@ t0.b=t1.b AND (t8.b=t9.b OR t8.c IS NULL) AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 SIMPLE t0 ref idx_a idx_a 5 const 1 100.00 +1 SIMPLE t0 ref idx_a idx_a 5 const 1 100.00 Using where 1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 2 100.00 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where @@ -1063,9 +1063,9 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b FROM t0,t1 @@ -1201,7 +1201,7 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL a 5 NULL 21 Using index -1 SIMPLE t3 index c c 5 NULL 6 Using index +1 SIMPLE t3 index c c 5 NULL 6 Using where; Using index 1 SIMPLE t2 ref b b 5 test.t3.c 2 Using where; Using index SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; a b c @@ -1272,7 +1272,7 @@ DELETE FROM t3; EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL a 5 NULL 21 Using index -1 SIMPLE t3 index c c 5 NULL 0 Using index +1 SIMPLE t3 index c c 5 NULL 0 Using where; Using index 1 SIMPLE t2 ref b b 5 test.t3.c 2 Using where; Using index SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; a b c @@ -1445,7 +1445,7 @@ explain select * from t4 join t2 left join (t3 join t5 on t5.a=t3.b) on t3.a=t2.b where t4.a<=>t3.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL X -1 SIMPLE t3 ref a a 5 test.t2.b X +1 SIMPLE t3 ref a a 5 test.t2.b X Using where 1 SIMPLE t5 ref a a 5 test.t3.b X 1 SIMPLE t4 ref a a 5 test.t3.b X Using index condition explain select * from (t4 join t6 on t6.a=t4.b) right join t3 on t4.a=t3.b @@ -1453,16 +1453,16 @@ join t2 left join (t5 join t7 on t7.a=t5.b) on t5.a=t2.b where t3.a<=>t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL X 1 SIMPLE t3 ref a a 5 test.t2.b X Using index condition -1 SIMPLE t4 ref a a 5 test.t3.b X +1 SIMPLE t4 ref a a 5 test.t3.b X Using where 1 SIMPLE t6 ref a a 5 test.t4.b X -1 SIMPLE t5 ref a a 5 test.t2.b X +1 SIMPLE t5 ref a a 5 test.t2.b X Using where 1 SIMPLE t7 ref a a 5 test.t5.b X explain select * from t2 left join (t3 left join (t4 join t6 on t6.a=t4.b) on t4.a=t3.b join t5 on t5.a=t3.b) on t3.a=t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL X -1 SIMPLE t3 ref a a 5 test.t2.b X +1 SIMPLE t3 ref a a 5 test.t2.b X Using where 1 SIMPLE t5 ref a a 5 test.t3.b X 1 SIMPLE t4 ref a a 5 test.t5.a X Using where 1 SIMPLE t6 ref a a 5 test.t4.b X @@ -1478,7 +1478,7 @@ explain select * from t1 left join on (t1.a = t2.a); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 10 -1 SIMPLE t2 ref a a 5 test.t1.a 1 +1 SIMPLE t2 ref a a 5 test.t1.a 1 Using where 1 SIMPLE t3 ref a a 5 test.t1.a 1 Using where drop table t1, t2, t3; CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, type varchar(10)); @@ -1729,9 +1729,9 @@ LEFT JOIN (t5 JOIN t4 ON t5.carrier_id = t4.id) ON t4.carrier = t1.carrier; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 index package_id package_id 5 NULL 45 Using index +1 SIMPLE t2 index package_id package_id 5 NULL 45 Using where; Using index 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.package_id 1 -1 SIMPLE t4 eq_ref PRIMARY,id PRIMARY 2 test.t1.carrier 1 +1 SIMPLE t4 eq_ref PRIMARY,id PRIMARY 2 test.t1.carrier 1 Using where 1 SIMPLE t5 ref carrier_id carrier_id 5 test.t4.id 22 Using index 1 SIMPLE t3 ref package_id package_id 5 test.t1.id 1 Using where; Using index SELECT COUNT(*) diff --git a/mysql-test/r/join_nested_jcl6.result b/mysql-test/r/join_nested_jcl6.result index 5a2c5c4a460..ea637486c40 100644 --- a/mysql-test/r/join_nested_jcl6.result +++ b/mysql-test/r/join_nested_jcl6.result @@ -1,3 +1,6 @@ +set @save_optimizer_switch_jcl6=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; set join_cache_level=6; show variables like 'join_cache_level'; Variable_name Value @@ -77,8 +80,8 @@ ON t2.b=t4.b WHERE t3.a=1 OR t3.c IS NULL; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where ((`test`.`t3`.`a` = 1) or isnull(`test`.`t3`.`c`)) SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b @@ -153,9 +156,9 @@ ON t2.b=t4.b WHERE t3.a>1 OR t3.c IS NULL; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where ((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`)) SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b @@ -183,9 +186,9 @@ WHERE (t3.a>1 OR t3.c IS NULL) AND (t5.a<3 OR t5.c IS NULL); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where (((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`)) and ((`test`.`t5`.`a` < 3) or isnull(`test`.`t5`.`c`))) SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b @@ -233,8 +236,8 @@ t8 ON t7.b=t8.b AND t6.b < 10; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 -1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer -1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join) +1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: Note 1003 select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t8`.`b` = `test`.`t7`.`b`))) where 1 SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b @@ -548,14 +551,14 @@ t0.b=t1.b AND (t2.a >= 4 OR t2.c IS NULL); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer -1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join) +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) where ((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`))) SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, @@ -643,15 +646,15 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) SELECT t9.a,t9.b @@ -840,9 +843,9 @@ ON t3.a=1 AND t2.b=t4.b WHERE t1.a <= 2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) where (`test`.`t1`.`a` <= 2) CREATE INDEX idx_b ON t2(b); @@ -854,11 +857,11 @@ LEFT JOIN ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 -1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer -1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where; Using join buffer -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) +1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where; Using join buffer (incremental, BKA join) +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join) Warnings: -Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(((`test`.`t3`.`a` = 1) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`)))) where 1 +Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on((((`test`.`t3`.`a` = 1) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`))) and (`test`.`t3`.`b` is not null))) where 1 SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b FROM (t3,t4) LEFT JOIN @@ -910,15 +913,15 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t4(b); @@ -960,17 +963,17 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer -1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join) +1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t8(b); EXPLAIN EXTENDED SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, @@ -1009,17 +1012,17 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer -1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join) +1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join) +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t1(b); CREATE INDEX idx_a ON t0(a); EXPLAIN EXTENDED @@ -1058,18 +1061,18 @@ t0.b=t1.b AND (t8.b=t9.b OR t8.c IS NULL) AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 SIMPLE t0 ref idx_a idx_a 5 const 1 100.00 -1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 2 100.00 Using join buffer -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer -1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer -1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t0 ref idx_a idx_a 5 const 1 100.00 Using where +1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 2 100.00 Using join buffer (flat, BKA join) +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join) +1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join) +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b FROM t0,t1 @@ -1205,7 +1208,7 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL a 5 NULL 21 Using index -1 SIMPLE t3 index c c 5 NULL 6 Using index +1 SIMPLE t3 index c c 5 NULL 6 Using where; Using index 1 SIMPLE t2 ref b b 5 test.t3.c 2 Using where; Using index SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; a b c @@ -1276,7 +1279,7 @@ DELETE FROM t3; EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL a 5 NULL 21 Using index -1 SIMPLE t3 index c c 5 NULL 0 Using index +1 SIMPLE t3 index c c 5 NULL 0 Using where; Using index 1 SIMPLE t2 ref b b 5 test.t3.c 2 Using where; Using index SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; a b c @@ -1321,8 +1324,8 @@ c11 c21 c31 EXPLAIN SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 -1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer -1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join) DROP TABLE t1,t2,t3; CREATE TABLE t1 (goods int(12) NOT NULL, price varchar(128) NOT NULL); INSERT INTO t1 VALUES (23, 2340), (26, 9900); @@ -1449,27 +1452,27 @@ explain select * from t4 join t2 left join (t3 join t5 on t5.a=t3.b) on t3.a=t2.b where t4.a<=>t3.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL X -1 SIMPLE t3 ref a a 5 test.t2.b X Using join buffer -1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer -1 SIMPLE t4 ref a a 5 test.t3.b X Using index condition(BKA); Using join buffer +1 SIMPLE t3 ref a a 5 test.t2.b X Using where; Using join buffer (flat, BKA join) +1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer (incremental, BKA join) +1 SIMPLE t4 ref a a 5 test.t3.b X Using index condition(BKA); Using join buffer (incremental, BKA join) explain select * from (t4 join t6 on t6.a=t4.b) right join t3 on t4.a=t3.b join t2 left join (t5 join t7 on t7.a=t5.b) on t5.a=t2.b where t3.a<=>t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL X -1 SIMPLE t3 ref a a 5 test.t2.b X Using index condition(BKA); Using join buffer -1 SIMPLE t4 ref a a 5 test.t3.b X Using join buffer -1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer -1 SIMPLE t5 ref a a 5 test.t2.b X Using join buffer -1 SIMPLE t7 ref a a 5 test.t5.b X Using join buffer +1 SIMPLE t3 ref a a 5 test.t2.b X Using index condition(BKA); Using join buffer (flat, BKA join) +1 SIMPLE t4 ref a a 5 test.t3.b X Using where; Using join buffer (incremental, BKA join) +1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer (incremental, BKA join) +1 SIMPLE t5 ref a a 5 test.t2.b X Using where; Using join buffer (incremental, BKA join) +1 SIMPLE t7 ref a a 5 test.t5.b X Using join buffer (incremental, BKA join) explain select * from t2 left join (t3 left join (t4 join t6 on t6.a=t4.b) on t4.a=t3.b join t5 on t5.a=t3.b) on t3.a=t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL X -1 SIMPLE t3 ref a a 5 test.t2.b X Using join buffer -1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer -1 SIMPLE t4 ref a a 5 test.t5.a X Using where; Using join buffer -1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer +1 SIMPLE t3 ref a a 5 test.t2.b X Using where; Using join buffer (flat, BKA join) +1 SIMPLE t5 ref a a 5 test.t3.b X Using join buffer (incremental, BKA join) +1 SIMPLE t4 ref a a 5 test.t5.a X Using where; Using join buffer (incremental, BKA join) +1 SIMPLE t6 ref a a 5 test.t4.b X Using join buffer (incremental, BKA join) drop table t0, t1, t2, t3, t4, t5, t6, t7; create table t1 (a int); insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); @@ -1482,8 +1485,8 @@ explain select * from t1 left join on (t1.a = t2.a); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 10 -1 SIMPLE t2 ref a a 5 test.t1.a 1 Using join buffer -1 SIMPLE t3 ref a a 5 test.t1.a 1 Using where; Using join buffer +1 SIMPLE t2 ref a a 5 test.t1.a 1 Using where; Using join buffer (flat, BKA join) +1 SIMPLE t3 ref a a 5 test.t1.a 1 Using where; Using join buffer (incremental, BKA join) drop table t1, t2, t3; CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, type varchar(10)); CREATE TABLE t2 (pid int NOT NULL PRIMARY KEY, type varchar(10)); @@ -1733,9 +1736,9 @@ LEFT JOIN (t5 JOIN t4 ON t5.carrier_id = t4.id) ON t4.carrier = t1.carrier; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 index package_id package_id 5 NULL 45 Using index -1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.package_id 1 Using join buffer -1 SIMPLE t4 eq_ref PRIMARY,id PRIMARY 2 test.t1.carrier 1 +1 SIMPLE t2 index package_id package_id 5 NULL 45 Using where; Using index +1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.package_id 1 Using join buffer (flat, BKA join) +1 SIMPLE t4 eq_ref PRIMARY,id PRIMARY 2 test.t1.carrier 1 Using where 1 SIMPLE t5 ref carrier_id carrier_id 5 test.t4.id 22 Using index 1 SIMPLE t3 ref package_id package_id 5 test.t1.id 1 Using where; Using index SELECT COUNT(*) @@ -1747,6 +1750,64 @@ ON t4.carrier = t1.carrier; COUNT(*) 6 DROP TABLE t1,t2,t3,t4,t5; +CREATE TABLE t1 ( +pk int NOT NULL AUTO_INCREMENT PRIMARY KEY, +a int DEFAULT NULL, +KEY idx(a) +); +CREATE TABLE t2 ( +pk int NOT NULL AUTO_INCREMENT PRIMARY KEY, +a int DEFAULT NULL, +KEY idx(a) +); +CREATE TABLE t3 ( +pk int NOT NULL AUTO_INCREMENT PRIMARY KEY, +a int DEFAULT NULL, +KEY idx(a) +); +INSERT INTO t1 VALUES +(1,2), (2,7), (3,5), (4,7), (5,5), (6,NULL), (7,NULL), (8,9); +INSERT INTO t2 VALUES +(1,NULL), (4,2), (5,2), (3,4), (2,8); +INSERT INTO t3 VALUES +(1,9), (2,2), (3,5), (4,2), (5,7), (6,0), (7,5); +SELECT t1.pk, t1.a, t2.pk, t2.a,t3.pk, t3.a +FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t3.a=t2.a) ON t2.a=t1.a; +pk a pk a pk a +1 2 4 2 2 2 +1 2 5 2 2 2 +1 2 4 2 4 2 +1 2 5 2 4 2 +2 7 NULL NULL NULL NULL +3 5 NULL NULL NULL NULL +4 7 NULL NULL NULL NULL +5 5 NULL NULL NULL NULL +6 NULL NULL NULL NULL NULL +7 NULL NULL NULL NULL NULL +8 9 NULL NULL NULL NULL +SELECT t1.pk, t1.a, t2.pk, t2.a,t3.pk, t3.a +FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t3.a=t2.a) ON t2.a=t1.a +WHERE t2.pk IS NULL; +pk a pk a pk a +2 7 NULL NULL NULL NULL +3 5 NULL NULL NULL NULL +4 7 NULL NULL NULL NULL +5 5 NULL NULL NULL NULL +6 NULL NULL NULL NULL NULL +7 NULL NULL NULL NULL NULL +8 9 NULL NULL NULL NULL +SELECT t1.pk, t1.a, t2.pk, t2.a,t3.pk, t3.a +FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t3.a=t2.a) ON t2.a=t1.a +WHERE t3.pk IS NULL; +pk a pk a pk a +2 7 NULL NULL NULL NULL +3 5 NULL NULL NULL NULL +4 7 NULL NULL NULL NULL +5 5 NULL NULL NULL NULL +6 NULL NULL NULL NULL NULL +7 NULL NULL NULL NULL NULL +8 9 NULL NULL NULL NULL +DROP TABLE t1, t2, t3; End of 5.0 tests CREATE TABLE t5 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b)); CREATE TABLE t6 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b)); @@ -1770,9 +1831,9 @@ ON t6.b >= 2 AND t5.b=t7.b AND (t8.a > 0 OR t8.c IS NULL); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t5 ALL NULL NULL NULL NULL 3 -1 SIMPLE t7 ref b_i b_i 5 test.t5.b 2 Using join buffer -1 SIMPLE t6 ALL b_i NULL NULL NULL 3 Using where; Using join buffer -1 SIMPLE t8 ref b_i b_i 5 test.t5.b 2 Using where; Using join buffer +1 SIMPLE t7 ref b_i b_i 5 test.t5.b 2 Using where; Using join buffer (flat, BKA join) +1 SIMPLE t6 ALL b_i NULL NULL NULL 3 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE t8 ref b_i b_i 5 test.t5.b 2 Using where; Using join buffer (incremental, BKA join) SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b FROM t5 LEFT JOIN @@ -1805,9 +1866,9 @@ FROM t5 LEFT JOIN ON (t5.b=t8.b); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t5 ALL NULL NULL NULL NULL 2 -1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer -1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer -1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join) +1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer (incremental, BKA join) +1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join) SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b FROM t5 LEFT JOIN (t6 LEFT JOIN t7 ON t7.a=1, t8) @@ -1822,9 +1883,9 @@ FROM t5 LEFT JOIN ON (t5.b=t8.b); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t5 ALL NULL NULL NULL NULL 2 -1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer -1 SIMPLE t7 ref b_i b_i 5 const 0 Using join buffer -1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join) +1 SIMPLE t7 ref b_i b_i 5 const 0 Using join buffer (incremental, BKA join) +1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join) SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b FROM t5 LEFT JOIN (t6 LEFT JOIN t7 ON t7.b=2, t8) @@ -1839,9 +1900,9 @@ FROM t5 LEFT JOIN ON (t5.b=t8.b); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t5 ALL NULL NULL NULL NULL 2 -1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer -1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer +1 SIMPLE t8 ALL b_i NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (incremental, BNL join) +1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer (incremental, BKA join) SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b FROM t5 LEFT JOIN (t8, t6 LEFT JOIN t7 ON t7.a=1) @@ -1854,3 +1915,4 @@ set join_cache_level=default; show variables like 'join_cache_level'; Variable_name Value join_cache_level 1 +set @@optimizer_switch=@save_optimizer_switch_jcl6; diff --git a/mysql-test/r/join_outer.result b/mysql-test/r/join_outer.result index 6d867f96034..aa5baeb6cc7 100644 --- a/mysql-test/r/join_outer.result +++ b/mysql-test/r/join_outer.result @@ -1126,7 +1126,7 @@ a b a b 7 8 7 5 EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a OR t1.a = t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 +1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a IN(t2.a, t2.b); id select_type table type possible_keys key key_len ref rows Extra @@ -1335,7 +1335,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE tt6 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE tt7 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE tt8 ALL NULL NULL NULL NULL 2 Using where -1 SIMPLE tt9 ALL NULL NULL NULL NULL 2 Using join buffer +1 SIMPLE tt9 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join) SET optimizer_search_depth = DEFAULT; DROP TABLE t1; # @@ -1354,7 +1354,7 @@ EXPLAIN SELECT STRAIGHT_JOIN COUNT(*) FROM t1 TA1 RIGHT JOIN t2 TA2 JOIN t2 TA3 ON TA2.f1 ON TA3.f1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE TA2 ALL NULL NULL NULL NULL 20 Using where -1 SIMPLE TA3 ALL NULL NULL NULL NULL 20 Using join buffer +1 SIMPLE TA3 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join) 1 SIMPLE TA1 ALL NULL NULL NULL NULL 2 Using where DROP TABLE t1, t2; # @@ -1449,4 +1449,63 @@ group by t2.pk; pk t 2001 3001 drop table t1,t2,t3,t4; +# +# Bug#57024: Poor performance when conjunctive condition over the outer +# table is used in the on condition of an outer join +# +create table t1 (a int); +insert into t1 values (NULL), (NULL), (NULL), (NULL); +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 values (4), (2), (1), (3); +create table t2 like t1; +insert into t2 select if(t1.a is null, 10, t1.a) from t1; +create table t3 (a int, b int, index idx(a)); +insert into t3 values (1, 100), (3, 301), (4, 402), (1, 102), (1, 101); +analyze table t1,t2,t3; +Table Op Msg_type Msg_text +test.t1 analyze status OK +test.t2 analyze status OK +test.t3 analyze status OK +flush status; +select sum(t3.b) from t1 left join t3 on t3.a=t1.a and t1.a is not null; +sum(t3.b) +1006 +show status like "handler_read%"; +Variable_name Value +Handler_read_first 0 +Handler_read_key 4 +Handler_read_next 5 +Handler_read_prev 0 +Handler_read_rnd 0 +Handler_read_rnd_next 1048581 +flush status; +select sum(t3.b) from t2 left join t3 on t3.a=t2.a and t2.a <> 10; +sum(t3.b) +1006 +show status like "handler_read%"; +Variable_name Value +Handler_read_first 0 +Handler_read_key 4 +Handler_read_next 5 +Handler_read_prev 0 +Handler_read_rnd 0 +Handler_read_rnd_next 1048581 +drop table t1,t2,t3; End of 5.1 tests diff --git a/mysql-test/r/join_outer_jcl6.result b/mysql-test/r/join_outer_jcl6.result index 2f8a6ae93e0..668e2bbce37 100644 --- a/mysql-test/r/join_outer_jcl6.result +++ b/mysql-test/r/join_outer_jcl6.result @@ -1,3 +1,6 @@ +set @save_optimizer_switch_jcl6=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; set join_cache_level=6; show variables like 'join_cache_level'; Variable_name Value @@ -99,7 +102,7 @@ id select_type table type possible_keys key key_len ref rows Extra explain select t1.*,t2.* from t1 left join t2 on t1.a=t2.a where isnull(t2.a)=1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 7 -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 test.t1.a 1 Using where; Using join buffer +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 test.t1.a 1 Using where; Using join buffer (flat, BKA join) select t1.*,t2.*,t3.a from t1 left join t2 on (t1.a=t2.a) left join t1 as t3 on (t2.a=t3.a); grp a c id a c d a 1 1 a 1 1 a 1 1 @@ -316,11 +319,11 @@ Lilliana Angelovska NULL NULL explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists; Using join buffer (flat, BNL join) explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.name is null; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) select count(*) from t1 left join t2 on (t1.id = t2.owner); count(*) 4 @@ -336,11 +339,11 @@ Lilliana Angelovska NULL NULL explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists; Using join buffer (flat, BNL join) explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.name is null; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) select count(*) from t2 right join t1 on (t1.id = t2.owner); count(*) 4 @@ -692,8 +695,8 @@ a1 a2 b1 b2 c1 c2 explain select * from t1 left join t2 on b1 = a1 left join t3 on c1 = a1 and b1 is null; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer -1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join) drop table t1, t2, t3; create table t1 ( a int(11), @@ -742,13 +745,13 @@ explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from order by m.match_id desc; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort -1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer +1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer (flat, BKA join) explain select s.*, '*', m.*, (s.match_1_h - m.home) UUX from (t2 s left join t1 m on m.match_id = 1) order by UUX desc; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort -1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer +1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer (flat, BKA join) select s.*, '*', m.*, (s.match_1_h - m.home) UUX from (t2 s left join t1 m on m.match_id = 1) order by UUX desc; @@ -768,7 +771,7 @@ t2 s straight_join t1 m where m.match_id = 1 order by UUX desc; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE s ALL NULL NULL NULL NULL 10 Using temporary; Using filesort -1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer +1 SIMPLE m const match_id,match_id_2 match_id 1 const 1 Using join buffer (flat, BKA join) select s.*, '*', m.*, (s.match_1_h - m.home) UUX from t2 s straight_join t1 m where m.match_id = 1 order by UUX desc; @@ -1130,16 +1133,16 @@ a b a b 7 8 7 5 EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a OR t1.a = t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 -1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer +1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where +1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer (flat, BKA join) EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a IN(t2.a, t2.b); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where -1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer +1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer (flat, BKA join) EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a > IF(t1.a = t2.b-2, t2.b, t2.b-1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where -1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer +1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using join buffer (flat, BKA join) DROP TABLE t1,t2; DROP VIEW IF EXISTS v1,v2; DROP TABLE IF EXISTS t1,t2; @@ -1228,7 +1231,7 @@ EXPLAIN SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 -1 SIMPLE t2 ref idx idx 4 test.t1.id 2 Using where; Not exists; Using join buffer +1 SIMPLE t2 ref idx idx 4 test.t1.id 2 Using where; Not exists; Using join buffer (flat, BKA join) flush status; SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL; id a @@ -1332,14 +1335,14 @@ RIGHT OUTER JOIN t1 tt1 ON 1 STRAIGHT_JOIN t1 tt9 ON 1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE tt1 ALL NULL NULL NULL NULL 2 -1 SIMPLE tt2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer -1 SIMPLE tt3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer -1 SIMPLE tt4 ALL NULL NULL NULL NULL 2 Using where; Using join buffer -1 SIMPLE tt5 ALL NULL NULL NULL NULL 2 Using where; Using join buffer -1 SIMPLE tt6 ALL NULL NULL NULL NULL 2 Using where; Using join buffer -1 SIMPLE tt7 ALL NULL NULL NULL NULL 2 Using where; Using join buffer -1 SIMPLE tt8 ALL NULL NULL NULL NULL 2 Using where; Using join buffer -1 SIMPLE tt9 ALL NULL NULL NULL NULL 2 Using join buffer +1 SIMPLE tt2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) +1 SIMPLE tt3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE tt4 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE tt5 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE tt6 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE tt7 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE tt8 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join) +1 SIMPLE tt9 ALL NULL NULL NULL NULL 2 Using join buffer (incremental, BNL join) SET optimizer_search_depth = DEFAULT; DROP TABLE t1; # @@ -1358,8 +1361,8 @@ EXPLAIN SELECT STRAIGHT_JOIN COUNT(*) FROM t1 TA1 RIGHT JOIN t2 TA2 JOIN t2 TA3 ON TA2.f1 ON TA3.f1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE TA2 ALL NULL NULL NULL NULL 20 Using where -1 SIMPLE TA3 ALL NULL NULL NULL NULL 20 Using join buffer -1 SIMPLE TA1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer +1 SIMPLE TA3 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join) +1 SIMPLE TA1 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join) DROP TABLE t1, t2; # # Bug#48971 Segfault in add_found_match_trig_cond () at sql_select.cc:5990 @@ -1376,11 +1379,11 @@ RIGHT JOIN t1 AS jt6 ON jt6.f1 ON 1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE jt1 index NULL PRIMARY 4 NULL 2 100.00 Using index -1 SIMPLE jt6 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer -1 SIMPLE jt3 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer -1 SIMPLE jt4 index NULL PRIMARY 4 NULL 2 100.00 Using index; Using join buffer -1 SIMPLE jt5 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer -1 SIMPLE jt2 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer +1 SIMPLE jt6 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (flat, BNL join) +1 SIMPLE jt3 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join) +1 SIMPLE jt4 index NULL PRIMARY 4 NULL 2 100.00 Using index; Using join buffer (incremental, BNL join) +1 SIMPLE jt5 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join) +1 SIMPLE jt2 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join) Warnings: Note 1003 select straight_join `test`.`jt1`.`f1` AS `f1` from `test`.`t1` `jt1` left join (`test`.`t1` `jt6` left join (`test`.`t1` `jt3` join `test`.`t1` `jt4` left join `test`.`t1` `jt5` on(1) left join `test`.`t1` `jt2` on(1)) on((`test`.`jt6`.`f1` and 1))) on(1) where 1 EXPLAIN EXTENDED SELECT STRAIGHT_JOIN jt1.f1 FROM t1 AS jt1 @@ -1393,11 +1396,11 @@ RIGHT JOIN t1 AS jt6 ON jt6.f1 ON 1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE jt6 index NULL PRIMARY 4 NULL 2 100.00 Using index -1 SIMPLE jt3 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer -1 SIMPLE jt4 index NULL PRIMARY 4 NULL 2 100.00 Using index; Using join buffer -1 SIMPLE jt5 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer -1 SIMPLE jt2 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer -1 SIMPLE jt1 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer +1 SIMPLE jt3 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (flat, BNL join) +1 SIMPLE jt4 index NULL PRIMARY 4 NULL 2 100.00 Using index; Using join buffer (incremental, BNL join) +1 SIMPLE jt5 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join) +1 SIMPLE jt2 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join) +1 SIMPLE jt1 index NULL PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join) Warnings: Note 1003 select straight_join `test`.`jt1`.`f1` AS `f1` from `test`.`t1` `jt6` left join (`test`.`t1` `jt3` join `test`.`t1` `jt4` left join `test`.`t1` `jt5` on(1) left join `test`.`t1` `jt2` on(1)) on((`test`.`jt6`.`f1` and 1)) left join `test`.`t1` `jt1` on(1) where 1 DROP TABLE t1; @@ -1453,8 +1456,68 @@ group by t2.pk; pk t 2001 3001 drop table t1,t2,t3,t4; +# +# Bug#57024: Poor performance when conjunctive condition over the outer +# table is used in the on condition of an outer join +# +create table t1 (a int); +insert into t1 values (NULL), (NULL), (NULL), (NULL); +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 values (4), (2), (1), (3); +create table t2 like t1; +insert into t2 select if(t1.a is null, 10, t1.a) from t1; +create table t3 (a int, b int, index idx(a)); +insert into t3 values (1, 100), (3, 301), (4, 402), (1, 102), (1, 101); +analyze table t1,t2,t3; +Table Op Msg_type Msg_text +test.t1 analyze status OK +test.t2 analyze status OK +test.t3 analyze status OK +flush status; +select sum(t3.b) from t1 left join t3 on t3.a=t1.a and t1.a is not null; +sum(t3.b) +1006 +show status like "handler_read%"; +Variable_name Value +Handler_read_first 0 +Handler_read_key 4 +Handler_read_next 5 +Handler_read_prev 0 +Handler_read_rnd 5 +Handler_read_rnd_next 1048581 +flush status; +select sum(t3.b) from t2 left join t3 on t3.a=t2.a and t2.a <> 10; +sum(t3.b) +1006 +show status like "handler_read%"; +Variable_name Value +Handler_read_first 0 +Handler_read_key 4 +Handler_read_next 5 +Handler_read_prev 0 +Handler_read_rnd 5 +Handler_read_rnd_next 1048581 +drop table t1,t2,t3; End of 5.1 tests set join_cache_level=default; show variables like 'join_cache_level'; Variable_name Value join_cache_level 1 +set @@optimizer_switch=@save_optimizer_switch_jcl6; diff --git a/mysql-test/r/key_cache.result b/mysql-test/r/key_cache.result index a87ade614b8..f424c5ac297 100644 --- a/mysql-test/r/key_cache.result +++ b/mysql-test/r/key_cache.result @@ -642,7 +642,7 @@ i 3 explain select count(*) from t1, t2 where t1.p = t2.i; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 index k1 k1 5 NULL 1024 Using index +1 SIMPLE t2 index k1 k1 5 NULL 1024 Using where; Using index 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.i 1 Using index select count(*) from t1, t2 where t1.p = t2.i; count(*) diff --git a/mysql-test/r/key_diff.result b/mysql-test/r/key_diff.result index 9d26bee4557..af928fcb203 100644 --- a/mysql-test/r/key_diff.result +++ b/mysql-test/r/key_diff.result @@ -36,7 +36,7 @@ a a a a explain select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL a NULL NULL NULL 5 -1 SIMPLE t2 ALL b NULL NULL NULL 5 Using where; Using join buffer +1 SIMPLE t2 ALL b NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B order by binary t1.a,t2.a; a b a b A B a a diff --git a/mysql-test/r/lowercase_mixed_tmpdir_innodb.result b/mysql-test/r/lowercase_mixed_tmpdir_innodb.result index a478b49cfda..a478b49cfda 100755..100644 --- a/mysql-test/r/lowercase_mixed_tmpdir_innodb.result +++ b/mysql-test/r/lowercase_mixed_tmpdir_innodb.result diff --git a/mysql-test/r/myisam.result b/mysql-test/r/myisam.result index a4b201754c0..1174ba7dfcf 100644 --- a/mysql-test/r/myisam.result +++ b/mysql-test/r/myisam.result @@ -346,23 +346,23 @@ t1 1 c_2 2 a A 5 NULL NULL BTREE explain select * from t1,t2 where t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL a NULL NULL NULL 2 -1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer +1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) explain select * from t1,t2 force index(a) where t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL a NULL NULL NULL 2 -1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer +1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) explain select * from t1 force index(a),t2 force index(a) where t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL a NULL NULL NULL 2 1 SIMPLE t1 ref a a 4 test.t2.a 3 explain select * from t1,t2 where t1.b=t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL b NULL NULL NULL 2 +1 SIMPLE t2 ALL b NULL NULL NULL 2 Using where 1 SIMPLE t1 ref b b 5 test.t2.b 1 explain select * from t1,t2 force index(c) where t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 -1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer +1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) explain select * from t1 where a=0 or a=2; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL a NULL NULL NULL 5 Using where diff --git a/mysql-test/r/null_key.result b/mysql-test/r/null_key.result index d59383f3037..67725c45314 100644 --- a/mysql-test/r/null_key.result +++ b/mysql-test/r/null_key.result @@ -178,12 +178,12 @@ create table t2 (a int); insert into t2 values (7),(8); explain select * from t2 straight_join t1 where t1.a=t2.a and b is null; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t1 ref a,b a 10 test.t2.a,const 2 Using where; Using index drop index b on t1; explain select * from t2,t1 where t1.a=t2.a and b is null; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t1 ref a a 10 test.t2.a,const 2 Using where; Using index select * from t2,t1 where t1.a=t2.a and b is null; a a b @@ -191,7 +191,7 @@ a a b 8 8 NULL explain select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null); id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t1 ref_or_null a a 10 test.t2.a,const 4 Using index select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null); a a b @@ -407,8 +407,8 @@ EXPLAIN SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 -1 SIMPLE t2 ref idx idx 5 test.t1.a 1 -1 SIMPLE t3 ref idx idx 5 test.t2.b 1 Using index +1 SIMPLE t2 ref idx idx 5 test.t1.a 1 Using where +1 SIMPLE t3 ref idx idx 5 test.t2.b 1 Using where; Using index FLUSH STATUS ; SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b; diff --git a/mysql-test/r/optimizer_switch.result b/mysql-test/r/optimizer_switch.result index 6bccefe54be..118eeaa094c 100644 --- a/mysql-test/r/optimizer_switch.result +++ b/mysql-test/r/optimizer_switch.result @@ -4,19 +4,19 @@ # select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch='index_merge=off,index_merge_union=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch='index_merge_union=on'; select @@optimizer_switch; @@optimizer_switch -index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch='default,index_merge_sort_union=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch=4; ERROR 42000: Variable 'optimizer_switch' can't be set to the value of '4' set optimizer_switch=NULL; @@ -43,57 +43,57 @@ set optimizer_switch=default; set optimizer_switch='index_merge=off,index_merge_union=off,default'; select @@optimizer_switch; @@optimizer_switch -index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch=default; select @@global.optimizer_switch; @@global.optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set @@global.optimizer_switch=default; select @@global.optimizer_switch; @@global.optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on # # Check index_merge's @@optimizer_switch flags # select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on BUG#37120 optimizer_switch allowable values not according to specification select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch='default,materialization=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch='default,semijoin=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch='default,loosescan=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch='default,semijoin=off,materialization=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch='default,materialization=off,semijoin=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch='default,semijoin=off,materialization=off,loosescan=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch='default,semijoin=off,loosescan=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch='default,materialization=off,loosescan=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on set optimizer_switch=default; diff --git a/mysql-test/r/order_by.result b/mysql-test/r/order_by.result index dcd40f66365..adb4b2d1141 100644 --- a/mysql-test/r/order_by.result +++ b/mysql-test/r/order_by.result @@ -1489,7 +1489,7 @@ SELECT d FROM t1, t2 WHERE t2.b=14 AND t2.a=t1.a AND 5.1<t2.c AND t1.b='DE' ORDER BY t2.c LIMIT 1; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ref a,b b 4 const 4 Using index condition; Using temporary; Using filesort +1 SIMPLE t1 ref a,b b 4 const 4 Using index condition; Using where; Using temporary; Using filesort 1 SIMPLE t2 ref a,b,c a 40 test.t1.a,const 11 Using index condition SELECT d FROM t1, t2 WHERE t2.b=14 AND t2.a=t1.a AND 5.1<t2.c AND t1.b='DE' @@ -1608,18 +1608,18 @@ EXPLAIN SELECT * FROM t1 FORCE INDEX FOR ORDER BY (a), t2 WHERE t1.a < 2 ORDER BY t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range a a 5 NULL 2 Using index condition; Using MRR; Using temporary; Using filesort -1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) # should have "using filesort" EXPLAIN SELECT * FROM t1 USE INDEX FOR ORDER BY (a), t2 WHERE t1.a < 2 ORDER BY t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range a a 5 NULL 2 Using index condition; Using MRR; Using temporary; Using filesort -1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) # should have "using filesort" EXPLAIN SELECT * FROM t1 FORCE INDEX FOR JOIN (a), t2 WHERE t1.a < 2 ORDER BY t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range a a 5 NULL 2 Using index condition; Using MRR; Using temporary; Using filesort -1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) DROP TABLE t1, t2; End of 5.1 tests diff --git a/mysql-test/r/pool_of_threads.result b/mysql-test/r/pool_of_threads.result index 0577abaf4ae..74ea7ba12eb 100644 --- a/mysql-test/r/pool_of_threads.result +++ b/mysql-test/r/pool_of_threads.result @@ -1429,7 +1429,7 @@ companynr companynr explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008; fld1 companynr fld3 period 038008 37 reporters 1008 diff --git a/mysql-test/r/range.result b/mysql-test/r/range.result index f6ce69f4069..0df1763cb56 100644 --- a/mysql-test/r/range.result +++ b/mysql-test/r/range.result @@ -221,27 +221,27 @@ update t1 set y=x; explain select * from t1, t1 t2 where t1.y = 8 and t2.x between 7 and t1.y+0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer +1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 8 and t2.x >= 7 and t2.x <= t1.y+0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer +1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x between t1.y-1 and t1.y+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using MRR; Using join buffer +1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using MRR; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= t1.y-1 and t2.x <= t1.y+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using MRR; Using join buffer +1 SIMPLE t2 range x x 5 NULL 3 Using index condition; Using MRR; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x between 0 and t1.y; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer +1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= 0 and t2.x <= t1.y; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer +1 SIMPLE t2 range x x 5 NULL 2 Using index condition; Using MRR; Using join buffer (flat, BNL join) explain select count(*) from t1 where x in (1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref x x 5 const 1 Using index @@ -256,12 +256,12 @@ INSERT INTO t2 VALUES (0),(0),(1),(1),(2),(2); explain select * from t1, t2 where (t1.key1 <t2.keya + 1) and t2.keya=3; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ref j1 j1 4 const 1 Using index -1 SIMPLE t1 index i1 i1 4 NULL 7 Using where; Using index; Using join buffer +1 SIMPLE t1 index i1 i1 4 NULL 7 Using where; Using index; Using join buffer (flat, BNL join) explain select * from t1 force index(i1), t2 force index(j1) where (t1.key1 <t2.keya + 1) and t2.keya=3; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ref j1 j1 4 const 1 Using index -1 SIMPLE t1 index i1 i1 4 NULL 7 Using where; Using index; Using join buffer +1 SIMPLE t1 index i1 i1 4 NULL 7 Using where; Using index; Using join buffer (flat, BNL join) DROP TABLE t1,t2; CREATE TABLE t1 ( a int(11) default NULL, diff --git a/mysql-test/r/row.result b/mysql-test/r/row.result index 2962123fcb2..9b88cc59e31 100644 --- a/mysql-test/r/row.result +++ b/mysql-test/r/row.result @@ -377,7 +377,7 @@ a b a b c EXPLAIN EXTENDED SELECT * FROM t1,t2 WHERE (t1.a-1,t1.b)=(t2.a-1,t2.b+1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 index NULL PRIMARY 8 NULL 6 100.00 Using index -1 SIMPLE t2 index NULL PRIMARY 12 NULL 7 100.00 Using where; Using index; Using join buffer +1 SIMPLE t2 index NULL PRIMARY 12 NULL 7 100.00 Using where; Using index; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t1` join `test`.`t2` where (((`test`.`t1`.`a` - 1) = (`test`.`t2`.`a` - 1)) and (`test`.`t1`.`b` = (`test`.`t2`.`b` + 1))) SELECT * FROM t1,t2 WHERE (t1.a-1,t1.b)=(t2.a-1,t2.b+1); diff --git a/mysql-test/r/select.result b/mysql-test/r/select.result index 7722fbe5dcc..6d3a3717c67 100644 --- a/mysql-test/r/select.result +++ b/mysql-test/r/select.result @@ -1431,7 +1431,7 @@ companynr companynr explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008; fld1 companynr fld3 period 038008 37 reporters 1008 @@ -2363,7 +2363,7 @@ insert into t2 values (1,3), (2,3), (3,4), (4,4); explain select * from t1 left join t2 on a=c where d in (4); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ref c,d d 5 const 2 -1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer +1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) select * from t1 left join t2 on a=c where d in (4); a b c d 3 2 3 4 @@ -2371,7 +2371,7 @@ a b c d explain select * from t1 left join t2 on a=c where d = 4; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ref c,d d 5 const 2 -1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer +1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) select * from t1 left join t2 on a=c where d = 4; a b c d 3 2 3 4 @@ -2717,7 +2717,7 @@ where (t1.c=t2.a or (t1.c=t3.a and t2.a=t3.b)) and t1.b=556476786 and t2.b like '%%' order by t2.b limit 0,1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref b,c b 5 const 1 Using temporary; Using filesort -1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer +1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1) DROP TABLE t1,t2,t3; CREATE TABLE t1 (a int, INDEX idx(a)); @@ -2738,7 +2738,7 @@ ALTER TABLE t1 ENABLE KEYS; EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 index b b 5 NULL 2 Using index -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; a b a b 1 NULL 1 1 @@ -2748,7 +2748,7 @@ a b a b EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 index b b 5 NULL 2 Using index -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; a b a b 1 NULL 1 1 @@ -2910,11 +2910,11 @@ a EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 -1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) DROP TABLE t1,t2; select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0; x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0 @@ -3562,19 +3562,19 @@ EXPLAIN SELECT t2.* FROM t1 JOIN t2 ON t2.fk=t1.pk WHERE t2.fk < 'c' AND t2.pk=t1.fk; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 3 Using index condition; Using MRR +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 3 Using index condition; Using where; Using MRR 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where EXPLAIN SELECT t2.* FROM t1 JOIN t2 ON t2.fk=t1.pk WHERE t2.fk BETWEEN 'a' AND 'b' AND t2.pk=t1.fk; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using MRR +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using where; Using MRR 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where EXPLAIN SELECT t2.* FROM t1 JOIN t2 ON t2.fk=t1.pk WHERE t2.fk IN ('a','b') AND t2.pk=t1.fk; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using MRR +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using where; Using MRR 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where DROP TABLE t1,t2; CREATE TABLE t1 (a int, b varchar(20) NOT NULL, PRIMARY KEY(a)); @@ -3608,7 +3608,7 @@ WHERE t1.id = 8 AND t2.i BETWEEN t1.b AND t1.e AND t3.a=t2.a AND t3.c IN ('bb','ee'); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si si 5 NULL 4 Using index condition; Using MRR +1 SIMPLE t2 range si si 5 NULL 4 Using index condition; Using where; Using MRR 1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where EXPLAIN SELECT t3.a FROM t1,t2,t3 @@ -3616,7 +3616,7 @@ WHERE t1.id = 8 AND t2.i BETWEEN t1.b AND t1.e AND t3.a=t2.a AND t3.c IN ('bb','ee') ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si,ai si 5 NULL 4 Using index condition; Using MRR +1 SIMPLE t2 range si,ai si 5 NULL 4 Using index condition; Using where; Using MRR 1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where EXPLAIN SELECT t3.a FROM t1,t2 FORCE INDEX (si),t3 @@ -3624,7 +3624,7 @@ WHERE t1.id = 8 AND (t2.i=t1.b OR t2.i=t1.e) AND t3.a=t2.a AND t3.c IN ('bb','ee'); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si si 5 NULL 2 Using index condition; Using MRR +1 SIMPLE t2 range si si 5 NULL 2 Using index condition; Using where; Using MRR 1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where EXPLAIN SELECT t3.a FROM t1,t2,t3 @@ -3632,7 +3632,7 @@ WHERE t1.id = 8 AND (t2.i=t1.b OR t2.i=t1.e) AND t3.a=t2.a AND t3.c IN ('bb','ee'); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si,ai si 5 NULL 2 Using index condition; Using MRR +1 SIMPLE t2 range si,ai si 5 NULL 2 Using index condition; Using where; Using MRR 1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where DROP TABLE t1,t2,t3; CREATE TABLE t1 ( f1 int primary key, f2 int, f3 int, f4 int, f5 int, f6 int, checked_out int); diff --git a/mysql-test/r/select_jcl6.result b/mysql-test/r/select_jcl6.result index fb09a62eb73..ba5d3cddacb 100644 --- a/mysql-test/r/select_jcl6.result +++ b/mysql-test/r/select_jcl6.result @@ -1,3 +1,6 @@ +set @save_optimizer_switch_jcl6=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; set join_cache_level=6; show variables like 'join_cache_level'; Variable_name Value @@ -608,15 +611,15 @@ id select_type table type possible_keys key key_len ref rows Extra explain select * from t3 as t1,t3 where t1.period=t3.period order by t3.period; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL period NULL NULL NULL 41810 Using temporary; Using filesort -1 SIMPLE t3 ref period period 4 test.t1.period 4181 Using join buffer +1 SIMPLE t3 ref period period 4 test.t1.period 4181 Using join buffer (flat, BKA join) explain select * from t3 as t1,t3 where t1.period=t3.period order by t3.period limit 10; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 ALL period NULL NULL NULL 41810 Using temporary; Using filesort -1 SIMPLE t1 ref period period 4 test.t3.period 4181 Using join buffer +1 SIMPLE t1 ref period period 4 test.t3.period 4181 Using join buffer (flat, BKA join) explain select * from t3 as t1,t3 where t1.period=t3.period order by t1.period limit 10; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL period NULL NULL NULL 41810 Using temporary; Using filesort -1 SIMPLE t3 ref period period 4 test.t1.period 4181 Using join buffer +1 SIMPLE t3 ref period period 4 test.t1.period 4181 Using join buffer (flat, BKA join) select period from t1; period 9410 @@ -1363,11 +1366,11 @@ count(*) explain select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1200 -1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using where; Not exists; Using join buffer +1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using where; Not exists; Using join buffer (flat, BKA join) explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL NULL NULL NULL NULL 12 -1 SIMPLE t2 ALL NULL NULL NULL NULL 1200 Using where; Not exists; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1200 Using where; Not exists; Using join buffer (flat, BNL join) select companynr,companyname from t2 left join t4 using (companynr) where companynr is null; companynr companyname select count(*) from t2 left join t4 using (companynr) where companynr is not null; @@ -1383,51 +1386,51 @@ delete from t2 where fld1=999999; explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where -1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer +1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer (flat, BKA join) explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where -1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer +1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer (flat, BKA join) explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 and t4.companynr > 0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where -1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer +1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using join buffer (flat, BKA join) explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 and companynr > 0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr is null; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL NULL NULL NULL NULL 12 -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0 or t4.companynr > 0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) explain select t2.companynr,companyname from t4 left join t2 using (companynr) where ifnull(t2.companynr,1)>0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL NULL NULL NULL NULL 12 -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr is null; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0 or companynr > 0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) explain select companynr,companyname from t4 left join t2 using (companynr) where ifnull(companynr,1)>0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; companynr companynr 37 36 @@ -1435,7 +1438,7 @@ companynr companynr explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008; fld1 companynr fld3 period 038008 37 reporters 1008 @@ -2334,7 +2337,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t3 system NULL NULL NULL NULL 0 const row not found 1 SIMPLE t4 const id4 NULL NULL NULL 1 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 -1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join) select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3 left join t4 on id3 = id4 where id2 = 1 or id4 = 1; id1 id2 id3 id4 id44 @@ -2367,7 +2370,7 @@ insert into t2 values (1,3), (2,3), (3,4), (4,4); explain select * from t1 left join t2 on a=c where d in (4); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ref c,d d 5 const 2 -1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer +1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) select * from t1 left join t2 on a=c where d in (4); a b c d 3 2 3 4 @@ -2375,7 +2378,7 @@ a b c d explain select * from t1 left join t2 on a=c where d = 4; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ref c,d d 5 const 2 -1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer +1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) select * from t1 left join t2 on a=c where d = 4; a b c d 3 2 3 4 @@ -2721,7 +2724,7 @@ where (t1.c=t2.a or (t1.c=t3.a and t2.a=t3.b)) and t1.b=556476786 and t2.b like '%%' order by t2.b limit 0,1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref b,c b 5 const 1 Using temporary; Using filesort -1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer +1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1) DROP TABLE t1,t2,t3; CREATE TABLE t1 (a int, INDEX idx(a)); @@ -2742,7 +2745,7 @@ ALTER TABLE t1 ENABLE KEYS; EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 index b b 5 NULL 2 Using index -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; a b a b 1 NULL 1 1 @@ -2752,7 +2755,7 @@ a b a b EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 index b b 5 NULL 2 Using index -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; a b a b 1 NULL 1 1 @@ -2914,11 +2917,11 @@ a EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 -1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) DROP TABLE t1,t2; select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0; x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0 @@ -3458,7 +3461,7 @@ explain select * from t2 A, t2 B where A.a=5 and A.b=5 and A.C<5 and B.a=5 and B.b=A.e and (B.b =1 or B.b = 3 or B.b=5); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE A range PRIMARY PRIMARY 12 NULL 4 Using index condition; Using where; Using MRR -1 SIMPLE B ref PRIMARY PRIMARY 8 const,test.A.e 10 Using join buffer +1 SIMPLE B ref PRIMARY PRIMARY 8 const,test.A.e 10 Using join buffer (flat, BKA join) drop table t1, t2; CREATE TABLE t1 (a int PRIMARY KEY, b int, INDEX(b)); INSERT INTO t1 VALUES (1, 3), (9,4), (7,5), (4,5), (6,2), @@ -3472,12 +3475,12 @@ EXPLAIN SELECT a, c, d, f FROM t1,t2 WHERE a=c AND b BETWEEN 4 AND 6; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range PRIMARY,b b 5 NULL 3 Using index condition; Using MRR -1 SIMPLE t2 ref c c 5 test.t1.a 2 Using join buffer +1 SIMPLE t2 ref c c 5 test.t1.a 2 Using join buffer (flat, BKA join) EXPLAIN SELECT a, c, d, f FROM t1,t2 WHERE a=c AND b BETWEEN 4 AND 6 AND a > 0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range PRIMARY,b b 5 NULL 3 Using index condition; Using where; Using MRR -1 SIMPLE t2 ref c c 5 test.t1.a 2 Using join buffer +1 SIMPLE t2 ref c c 5 test.t1.a 2 Using join buffer (flat, BKA join) DROP TABLE t1, t2; create table t1 ( a int unsigned not null auto_increment primary key, @@ -3566,20 +3569,20 @@ EXPLAIN SELECT t2.* FROM t1 JOIN t2 ON t2.fk=t1.pk WHERE t2.fk < 'c' AND t2.pk=t1.fk; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 3 Using index condition; Using MRR -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 3 Using index condition; Using where; Using MRR +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer (flat, BKA join) EXPLAIN SELECT t2.* FROM t1 JOIN t2 ON t2.fk=t1.pk WHERE t2.fk BETWEEN 'a' AND 'b' AND t2.pk=t1.fk; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using MRR -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using where; Using MRR +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer (flat, BKA join) EXPLAIN SELECT t2.* FROM t1 JOIN t2 ON t2.fk=t1.pk WHERE t2.fk IN ('a','b') AND t2.pk=t1.fk; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using MRR -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using where; Using MRR +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where; Using join buffer (flat, BKA join) DROP TABLE t1,t2; CREATE TABLE t1 (a int, b varchar(20) NOT NULL, PRIMARY KEY(a)); CREATE TABLE t2 (a int, b varchar(20) NOT NULL, @@ -3612,32 +3615,32 @@ WHERE t1.id = 8 AND t2.i BETWEEN t1.b AND t1.e AND t3.a=t2.a AND t3.c IN ('bb','ee'); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si si 5 NULL 4 Using index condition; Using MRR -1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer +1 SIMPLE t2 range si si 5 NULL 4 Using index condition; Using where; Using MRR +1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer (flat, BKA join) EXPLAIN SELECT t3.a FROM t1,t2,t3 WHERE t1.id = 8 AND t2.i BETWEEN t1.b AND t1.e AND t3.a=t2.a AND t3.c IN ('bb','ee') ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si,ai si 5 NULL 4 Using index condition; Using MRR -1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer +1 SIMPLE t2 range si,ai si 5 NULL 4 Using index condition; Using where; Using MRR +1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer (flat, BKA join) EXPLAIN SELECT t3.a FROM t1,t2 FORCE INDEX (si),t3 WHERE t1.id = 8 AND (t2.i=t1.b OR t2.i=t1.e) AND t3.a=t2.a AND t3.c IN ('bb','ee'); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si si 5 NULL 2 Using index condition; Using MRR -1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer +1 SIMPLE t2 range si si 5 NULL 2 Using index condition; Using where; Using MRR +1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer (flat, BKA join) EXPLAIN SELECT t3.a FROM t1,t2,t3 WHERE t1.id = 8 AND (t2.i=t1.b OR t2.i=t1.e) AND t3.a=t2.a AND t3.c IN ('bb','ee'); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si,ai si 5 NULL 2 Using index condition; Using MRR -1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer +1 SIMPLE t2 range si,ai si 5 NULL 2 Using index condition; Using where; Using MRR +1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where; Using join buffer (flat, BKA join) DROP TABLE t1,t2,t3; CREATE TABLE t1 ( f1 int primary key, f2 int, f3 int, f4 int, f5 int, f6 int, checked_out int); CREATE TABLE t2 ( f11 int PRIMARY KEY ); @@ -4805,3 +4808,4 @@ set join_cache_level=default; show variables like 'join_cache_level'; Variable_name Value join_cache_level 1 +set @@optimizer_switch=@save_optimizer_switch_jcl6; diff --git a/mysql-test/r/select_pkeycache.result b/mysql-test/r/select_pkeycache.result index 7722fbe5dcc..6d3a3717c67 100644 --- a/mysql-test/r/select_pkeycache.result +++ b/mysql-test/r/select_pkeycache.result @@ -1431,7 +1431,7 @@ companynr companynr explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008; fld1 companynr fld3 period 038008 37 reporters 1008 @@ -2363,7 +2363,7 @@ insert into t2 values (1,3), (2,3), (3,4), (4,4); explain select * from t1 left join t2 on a=c where d in (4); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ref c,d d 5 const 2 -1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer +1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) select * from t1 left join t2 on a=c where d in (4); a b c d 3 2 3 4 @@ -2371,7 +2371,7 @@ a b c d explain select * from t1 left join t2 on a=c where d = 4; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ref c,d d 5 const 2 -1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer +1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) select * from t1 left join t2 on a=c where d = 4; a b c d 3 2 3 4 @@ -2717,7 +2717,7 @@ where (t1.c=t2.a or (t1.c=t3.a and t2.a=t3.b)) and t1.b=556476786 and t2.b like '%%' order by t2.b limit 0,1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref b,c b 5 const 1 Using temporary; Using filesort -1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer +1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1) DROP TABLE t1,t2,t3; CREATE TABLE t1 (a int, INDEX idx(a)); @@ -2738,7 +2738,7 @@ ALTER TABLE t1 ENABLE KEYS; EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 index b b 5 NULL 2 Using index -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; a b a b 1 NULL 1 1 @@ -2748,7 +2748,7 @@ a b a b EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 index b b 5 NULL 2 Using index -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; a b a b 1 NULL 1 1 @@ -2910,11 +2910,11 @@ a EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 -1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) DROP TABLE t1,t2; select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0; x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0 @@ -3562,19 +3562,19 @@ EXPLAIN SELECT t2.* FROM t1 JOIN t2 ON t2.fk=t1.pk WHERE t2.fk < 'c' AND t2.pk=t1.fk; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 3 Using index condition; Using MRR +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 3 Using index condition; Using where; Using MRR 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where EXPLAIN SELECT t2.* FROM t1 JOIN t2 ON t2.fk=t1.pk WHERE t2.fk BETWEEN 'a' AND 'b' AND t2.pk=t1.fk; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using MRR +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using where; Using MRR 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where EXPLAIN SELECT t2.* FROM t1 JOIN t2 ON t2.fk=t1.pk WHERE t2.fk IN ('a','b') AND t2.pk=t1.fk; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using MRR +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using index condition; Using where; Using MRR 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where DROP TABLE t1,t2; CREATE TABLE t1 (a int, b varchar(20) NOT NULL, PRIMARY KEY(a)); @@ -3608,7 +3608,7 @@ WHERE t1.id = 8 AND t2.i BETWEEN t1.b AND t1.e AND t3.a=t2.a AND t3.c IN ('bb','ee'); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si si 5 NULL 4 Using index condition; Using MRR +1 SIMPLE t2 range si si 5 NULL 4 Using index condition; Using where; Using MRR 1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where EXPLAIN SELECT t3.a FROM t1,t2,t3 @@ -3616,7 +3616,7 @@ WHERE t1.id = 8 AND t2.i BETWEEN t1.b AND t1.e AND t3.a=t2.a AND t3.c IN ('bb','ee') ; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si,ai si 5 NULL 4 Using index condition; Using MRR +1 SIMPLE t2 range si,ai si 5 NULL 4 Using index condition; Using where; Using MRR 1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where EXPLAIN SELECT t3.a FROM t1,t2 FORCE INDEX (si),t3 @@ -3624,7 +3624,7 @@ WHERE t1.id = 8 AND (t2.i=t1.b OR t2.i=t1.e) AND t3.a=t2.a AND t3.c IN ('bb','ee'); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si si 5 NULL 2 Using index condition; Using MRR +1 SIMPLE t2 range si si 5 NULL 2 Using index condition; Using where; Using MRR 1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where EXPLAIN SELECT t3.a FROM t1,t2,t3 @@ -3632,7 +3632,7 @@ WHERE t1.id = 8 AND (t2.i=t1.b OR t2.i=t1.e) AND t3.a=t2.a AND t3.c IN ('bb','ee'); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si,ai si 5 NULL 2 Using index condition; Using MRR +1 SIMPLE t2 range si,ai si 5 NULL 2 Using index condition; Using where; Using MRR 1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where DROP TABLE t1,t2,t3; CREATE TABLE t1 ( f1 int primary key, f2 int, f3 int, f4 int, f5 int, f6 int, checked_out int); diff --git a/mysql-test/r/select_safe.result b/mysql-test/r/select_safe.result index 9419f256472..26fb008c2a0 100644 --- a/mysql-test/r/select_safe.result +++ b/mysql-test/r/select_safe.result @@ -66,12 +66,12 @@ test.t1 analyze status OK insert into t1 values (null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"); explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL b NULL NULL NULL 21 +1 SIMPLE t1 ALL b NULL NULL NULL 21 Using where 1 SIMPLE t2 ref b b 21 test.t1.b 6 set MAX_SEEKS_FOR_KEY=1; explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL b NULL NULL NULL 21 +1 SIMPLE t1 ALL b NULL NULL NULL 21 Using where 1 SIMPLE t2 ref b b 21 test.t1.b 6 SET MAX_SEEKS_FOR_KEY=DEFAULT; drop table t1; diff --git a/mysql-test/r/ssl.result b/mysql-test/r/ssl.result index ca845e5ed91..1a52571c2d7 100644 --- a/mysql-test/r/ssl.result +++ b/mysql-test/r/ssl.result @@ -1432,7 +1432,7 @@ companynr companynr explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008; fld1 companynr fld3 period 038008 37 reporters 1008 diff --git a/mysql-test/r/ssl_compress.result b/mysql-test/r/ssl_compress.result index 0dd8d40c8da..d66b0a3a7f5 100644 --- a/mysql-test/r/ssl_compress.result +++ b/mysql-test/r/ssl_compress.result @@ -1435,7 +1435,7 @@ companynr companynr explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008; fld1 companynr fld3 period 038008 37 reporters 1008 diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result index 1b39b255f71..017bae87d41 100644 --- a/mysql-test/r/subselect.result +++ b/mysql-test/r/subselect.result @@ -907,7 +907,7 @@ explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) F id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index 2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using index -2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` drop table t1,t2,t3; @@ -1297,7 +1297,7 @@ a explain extended select * from t2 where t2.a in (select a from t1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index -1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer +1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`) select * from t2 where t2.a in (select a from t1 where t1.b <> 30); @@ -1307,7 +1307,7 @@ a explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index -1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer +1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); @@ -1317,7 +1317,7 @@ a explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index -1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer +1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`b`)) @@ -1339,7 +1339,7 @@ a 4 explain extended select * from t2 where t2.a in (select a from t1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index 1 PRIMARY t1 ref a a 5 test.t2.a 101 100.00 Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where (`test`.`t1`.`a` = `test`.`t2`.`a`) @@ -1349,7 +1349,7 @@ a 4 explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index 1 PRIMARY t1 ref a a 5 test.t2.a 101 100.00 Using where; Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) @@ -1359,8 +1359,8 @@ a 3 explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index -1 PRIMARY t3 index a a 5 NULL 3 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index +1 PRIMARY t3 index a a 5 NULL 3 100.00 Using where; Using index 1 PRIMARY t1 ref a a 10 test.t2.a,test.t3.a 116 100.61 Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1` join `test`.`t3`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` = `test`.`t3`.`a`)) @@ -1376,7 +1376,7 @@ a 4 explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index 1 PRIMARY t1 ref a a 5 test.t2.a 101 100.00 Using where; Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) @@ -4203,7 +4203,7 @@ CREATE INDEX I1 ON t1 (a); CREATE INDEX I2 ON t1 (b); EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 index I1 I1 2 NULL 2 Using index; LooseScan +1 PRIMARY t1 index I1 I1 2 NULL 2 Using where; Using index; LooseScan 1 PRIMARY t1 ref I2 I2 13 test.t1.a 2 Using index condition SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1); a b @@ -4213,7 +4213,7 @@ CREATE INDEX I1 ON t2 (a); CREATE INDEX I2 ON t2 (b); EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t2 index I1 I1 4 NULL 2 Using index; LooseScan +1 PRIMARY t2 index I1 I1 4 NULL 2 Using where; Using index; LooseScan 1 PRIMARY t2 ref I2 I2 13 test.t2.a 2 Using index condition SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2); a b diff --git a/mysql-test/r/subselect3.result b/mysql-test/r/subselect3.result index efb7a417bb0..b21c1a1d4b4 100644 --- a/mysql-test/r/subselect3.result +++ b/mysql-test/r/subselect3.result @@ -1,4 +1,5 @@ drop table if exists t0, t1, t2, t3, t4, t5, t11, t12, t21, t22; +set @save_optimizer_switch=@@optimizer_switch; create table t1 (oref int, grp int, ie int) ; insert into t1 (oref, grp, ie) values (1, 1, 1), @@ -260,7 +261,7 @@ from t2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 2 100.00 Using where; Full scan on NULL key -2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 100.00 Using where; Using join buffer +2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1 Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`b`,`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(select `test`.`t1`.`a`,`test`.`t1`.`b` from `test`.`t1` join `test`.`t4` where ((`test`.`t1`.`c` = `test`.`t2`.`oref`) and trigcond(((<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) and trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b`) or isnull(`test`.`t1`.`b`)))) having (trigcond(<is_not_null_test>(`test`.`t1`.`a`)) and trigcond(<is_not_null_test>(`test`.`t1`.`b`)))))) AS `Z` from `test`.`t2` @@ -1023,10 +1024,10 @@ explain select t21.* from t21,t22 where t21.a = t22.a and t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort -1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer -1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer +1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (flat, BNL join) +1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (flat, BNL join) 2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where -2 SUBQUERY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer +2 SUBQUERY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join) select t21.* from t21,t22 where t21.a = t22.a and t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a; a b c @@ -1046,7 +1047,7 @@ select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) a subq NULL 0 -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; drop table t1; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); @@ -1057,7 +1058,7 @@ insert into t0 values(2); explain select * from t1 where 2 in (select a from t0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; Start temporary; End temporary -1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join) select * from t1 where 2 in (select a from t0); a 0 @@ -1084,7 +1085,7 @@ set @@optimizer_switch='default,materialization=off'; explain select * from t1 where 2 in (select a from t0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; FirstMatch -1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join) select * from t1 where 2 in (select a from t0); a 0 @@ -1107,7 +1108,7 @@ a 17 18 19 -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; explain select * from (select a from t0) X where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 @@ -1124,15 +1125,15 @@ insert into t3 select A.a + 10*B.a from t0 A, t0 B; explain select * from t3 where a in (select kp1 from t1 where kp1<20); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using where; Using index; LooseScan -1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer +1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) create table t4 (pk int primary key); insert into t4 select a from t3; explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20 and t4.pk=t1.c); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using index condition; Using MRR; LooseScan +1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using index condition; Using where; Using MRR; LooseScan 1 PRIMARY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index; FirstMatch(t1) -1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer +1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) drop table t1, t3, t4; create table t1 (a int) as select * from t0 where a < 5; set @save_max_heap_table_size=@@max_heap_table_size; @@ -1141,10 +1142,10 @@ set @@max_heap_table_size= 16384; explain select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY E ALL NULL NULL NULL NULL 5 Start temporary -1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer -1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer -1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer -1 PRIMARY D ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer +1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) +1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) +1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) +1 PRIMARY D ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer (flat, BNL join) flush status; select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E); count(*) @@ -1153,7 +1154,7 @@ show status like 'Created_tmp_disk_tables'; Variable_name Value Created_tmp_disk_tables 1 set @save_max_heap_table_size=@@max_heap_table_size; -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; drop table t0, t1; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); @@ -1182,28 +1183,28 @@ insert into t3 values (1),(2); explain select * from t2 where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary -1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer (flat, BNL join) explain select * from t2 where a in (select a from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary -1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join) explain select * from t2 where a in (select a from t3); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary -1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer +1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join) explain select * from t1 where a in (select a from t3); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Start temporary -1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer +1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join) drop table t1, t2, t3; create table t1 (a decimal); insert into t1 values (1),(2); explain select * from t1 where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Start temporary -1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join) drop table t1; -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; create table t1 (a int); insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t2 as select * from t1; @@ -1218,25 +1219,25 @@ id select_type table type possible_keys key key_len ref rows Extra explain select straight_join * from t1 A, t1 B where A.a in (select a from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY A ALL NULL NULL NULL NULL 10 Using where -1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer +1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) 2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where 2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer +2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where 2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer +2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) explain select straight_join * from t2 X, t2 Y where X.a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY X ALL NULL NULL NULL NULL 10 Using where -1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer +1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) 2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer +2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) create table t0 (a int, b int); insert into t0 values(1,1); explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30); @@ -1261,11 +1262,11 @@ create table t2 as select * from t1; explain select * from t2 where a in (select b from t1 where a=3); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan -1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer +1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) explain select * from t2 where (b,a) in (select a,b from t1 where a=3); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan -1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer +1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) drop table t1,t2; create table t1 (a int, b int); insert into t1 select a,a from t0; @@ -1285,7 +1286,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 100 set @@optimizer_search_depth=@save_optimizer_search_depth; -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; drop table t0, t1, t2; create table t0 (a decimal(4,2)); insert into t0 values (10.24), (22.11); @@ -1323,8 +1324,8 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 1 PRIMARY subselect2 eq_ref unique_key unique_key 15 func 1 2 SUBQUERY X ALL NULL NULL NULL NULL 6 Using where -2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer -2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer +2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join) +2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join) drop table t0,t1,t2; BUG#37842: Assertion in DsMrr_impl::dsmrr_init, at handler.cc:4307 @@ -1395,7 +1396,7 @@ WHERE cona.postalStripped='T2H3B2' ); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2 1.00 -1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer +1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (flat, BNL join) 2 SUBQUERY cona ALL NULL NULL NULL NULL 2 100.00 Using where 2 SUBQUERY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 Warnings: @@ -1426,3 +1427,4 @@ CALL p1; ERROR 42S22: Unknown column 'f1' in 'where clause' DROP PROCEDURE p1; DROP TABLE t1, t2; +set @@optimizer_switch=@save_optimizer_switch; diff --git a/mysql-test/r/subselect3_jcl6.result b/mysql-test/r/subselect3_jcl6.result index d24c1baa814..b037af128fb 100644 --- a/mysql-test/r/subselect3_jcl6.result +++ b/mysql-test/r/subselect3_jcl6.result @@ -1,8 +1,12 @@ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; set join_cache_level=6; show variables like 'join_cache_level'; Variable_name Value join_cache_level 6 drop table if exists t0, t1, t2, t3, t4, t5, t11, t12, t21, t22; +set @save_optimizer_switch=@@optimizer_switch; create table t1 (oref int, grp int, ie int) ; insert into t1 (oref, grp, ie) values (1, 1, 1), @@ -163,7 +167,7 @@ from t3; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 4 100.00 Using where; Full scan on NULL key -2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 100.00 Using where; Using join buffer +2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 100.00 Using where; Using join buffer (flat, BKA join) Warnings: Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1 Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond(((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`)))) having trigcond(<is_not_null_test>(`test`.`t1`.`a`))))) AS `Z` from `test`.`t3` @@ -191,7 +195,7 @@ from t3; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 DEPENDENT SUBQUERY t1 ref a a 4 func 2 100.00 Using where; Full scan on NULL key -2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 100.00 Using where; Using join buffer +2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 100.00 Using where; Using join buffer (flat, BKA join) Warnings: Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1 Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`)))))) AS `Z` from `test`.`t3` @@ -264,7 +268,7 @@ from t2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 2 DEPENDENT SUBQUERY t1 ref_or_null a a 5 func 2 100.00 Using where; Full scan on NULL key -2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 100.00 Using where; Using join buffer +2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1 Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`b`,`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(select `test`.`t1`.`a`,`test`.`t1`.`b` from `test`.`t1` join `test`.`t4` where ((`test`.`t1`.`c` = `test`.`t2`.`oref`) and trigcond(((<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) and trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b`) or isnull(`test`.`t1`.`b`)))) having (trigcond(<is_not_null_test>(`test`.`t1`.`a`)) and trigcond(<is_not_null_test>(`test`.`t1`.`b`)))))) AS `Z` from `test`.`t2` @@ -735,7 +739,7 @@ WHERE t3.name='xxx' AND t2.id=t3.id); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where 2 DEPENDENT SUBQUERY t2 eq_ref PRIMARY PRIMARY 4 func 1 Using where; Using index; Full scan on NULL key -2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 func 1 Using index condition(BKA); Using where; Full scan on NULL key; Using join buffer +2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 func 1 Using index condition(BKA); Using where; Full scan on NULL key; Using join buffer (flat, BKA join) SELECT * FROM t1 WHERE t1.id NOT IN (SELECT t2.id FROM t2,t3 WHERE t3.name='xxx' AND t2.id=t3.id); @@ -1027,10 +1031,10 @@ explain select t21.* from t21,t22 where t21.a = t22.a and t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort -1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer -1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer +1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (incremental, BNL join) +1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (incremental, BNL join) 2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where -2 SUBQUERY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer +2 SUBQUERY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join) select t21.* from t21,t22 where t21.a = t22.a and t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a; a b c @@ -1051,7 +1055,7 @@ select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) a subq NULL 0 -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; drop table t1; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); @@ -1062,7 +1066,7 @@ insert into t0 values(2); explain select * from t1 where 2 in (select a from t0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; Start temporary; End temporary -1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join) select * from t1 where 2 in (select a from t0); a 0 @@ -1089,7 +1093,7 @@ set @@optimizer_switch='default,materialization=off'; explain select * from t1 where 2 in (select a from t0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 11 Using where; FirstMatch -1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join) select * from t1 where 2 in (select a from t0); a 0 @@ -1112,11 +1116,11 @@ a 17 18 19 -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; explain select * from (select a from t0) X where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 -1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using where; FirstMatch(<derived2>); Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using where; FirstMatch(<derived2>); Using join buffer (flat, BNL join) 2 DERIVED t0 ALL NULL NULL NULL NULL 11 drop table t0, t1; create table t0 (a int); @@ -1129,15 +1133,15 @@ insert into t3 select A.a + 10*B.a from t0 A, t0 B; explain select * from t3 where a in (select kp1 from t1 where kp1<20); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using where; Using index; LooseScan -1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer +1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) create table t4 (pk int primary key); insert into t4 select a from t3; explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20 and t4.pk=t1.c); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using index condition; Using MRR; LooseScan +1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using index condition; Using where; Using MRR; LooseScan 1 PRIMARY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index; FirstMatch(t1) -1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer +1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) drop table t1, t3, t4; create table t1 (a int) as select * from t0 where a < 5; set @save_max_heap_table_size=@@max_heap_table_size; @@ -1146,10 +1150,10 @@ set @@max_heap_table_size= 16384; explain select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY E ALL NULL NULL NULL NULL 5 Start temporary -1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer -1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer -1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer -1 PRIMARY D ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer +1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) +1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (incremental, BNL join) +1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer (incremental, BNL join) +1 PRIMARY D ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer (incremental, BNL join) flush status; select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E); count(*) @@ -1158,7 +1162,7 @@ show status like 'Created_tmp_disk_tables'; Variable_name Value Created_tmp_disk_tables 1 set @save_max_heap_table_size=@@max_heap_table_size; -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; drop table t0, t1; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); @@ -1169,7 +1173,7 @@ insert into t3 select A.a + 10*B.a, 'filler' from t0 A, t0 B; explain select * from t3 where a in (select a from t2) and (a > 5 or a < 10); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2 -1 PRIMARY t3 ref a a 5 test.t2.a 1 Using join buffer +1 PRIMARY t3 ref a a 5 test.t2.a 1 Using join buffer (flat, BKA join) 2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where select * from t3 where a in (select a from t2); a filler @@ -1187,28 +1191,28 @@ insert into t3 values (1),(2); explain select * from t2 where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary -1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer (flat, BNL join) explain select * from t2 where a in (select a from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary -1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join) explain select * from t2 where a in (select a from t3); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary -1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer +1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join) explain select * from t1 where a in (select a from t3); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Start temporary -1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer +1 PRIMARY t3 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join) drop table t1, t2, t3; create table t1 (a decimal); insert into t1 values (1),(2); explain select * from t1 where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Start temporary -1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join) drop table t1; -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; create table t1 (a int); insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t2 as select * from t1; @@ -1218,44 +1222,44 @@ explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10 -1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer +1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer (flat, BKA join) 2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where explain select straight_join * from t1 A, t1 B where A.a in (select a from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY A ALL NULL NULL NULL NULL 10 Using where -1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer +1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) 2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where 2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer +2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where 2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer +2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) explain select straight_join * from t2 X, t2 Y where X.a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY X ALL NULL NULL NULL NULL 10 Using where -1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer +1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) 2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer +2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) create table t0 (a int, b int); insert into t0 values(1,1); explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 system NULL NULL NULL NULL 1 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10 -1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer +1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer (flat, BKA join) 2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where create table t4 as select a as x, a as y from t1; explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 system NULL NULL NULL NULL 1 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10 -1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where; Using join buffer +1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where; Using join buffer (flat, BKA join) 2 SUBQUERY t4 ALL NULL NULL NULL NULL 10 Using where drop table t0,t1,t2,t3,t4; create table t0 (a int); @@ -1266,11 +1270,11 @@ create table t2 as select * from t1; explain select * from t2 where a in (select b from t1 where a=3); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan -1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer +1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) explain select * from t2 where (b,a) in (select a,b from t1 where a=3); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan -1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer +1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) drop table t1,t2; create table t1 (a int, b int); insert into t1 select a,a from t0; @@ -1290,7 +1294,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 100 set @@optimizer_search_depth=@save_optimizer_search_depth; -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; drop table t0, t1, t2; create table t0 (a decimal(4,2)); insert into t0 values (10.24), (22.11); @@ -1299,7 +1303,7 @@ insert into t1 select * from t0; explain select * from t0 where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 2 -1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer (flat, BNL join) select * from t0 where a in (select a from t1); a 10.24 @@ -1312,7 +1316,7 @@ insert into t1 select * from t0; explain select * from t0 where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 2 -1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; FirstMatch(t0); Using join buffer (flat, BNL join) select * from t0 where a in (select a from t1); a 2008-01-01 @@ -1328,8 +1332,8 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 1 PRIMARY subselect2 eq_ref unique_key unique_key 15 func 1 2 SUBQUERY X ALL NULL NULL NULL NULL 6 Using where -2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer -2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer +2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join) +2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer (incremental, BNL join) drop table t0,t1,t2; BUG#37842: Assertion in DsMrr_impl::dsmrr_init, at handler.cc:4307 @@ -1400,9 +1404,9 @@ WHERE cona.postalStripped='T2H3B2' ); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2 1.00 -1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer +1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer (incremental, BNL join) 2 SUBQUERY cona ALL NULL NULL NULL NULL 2 100.00 Using where -2 SUBQUERY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 Using join buffer +2 SUBQUERY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 Using join buffer (flat, BKA join) Warnings: Note 1003 select `test`.`a`.`idIndividual` AS `idIndividual` from `test`.`t1` `a` semi join (`test`.`t3` `cona` join `test`.`t2` `c`) where ((`test`.`c`.`idContact` = `test`.`cona`.`idContact`) and (`test`.`a`.`idIndividual` = `test`.`c`.`idObj`) and (`test`.`cona`.`postalStripped` = 'T2H3B2')) drop table t1,t2,t3; @@ -1431,7 +1435,9 @@ CALL p1; ERROR 42S22: Unknown column 'f1' in 'where clause' DROP PROCEDURE p1; DROP TABLE t1, t2; +set @@optimizer_switch=@save_optimizer_switch; set join_cache_level=default; show variables like 'join_cache_level'; Variable_name Value join_cache_level 1 +set @@optimizer_switch=@save_optimizer_switch; diff --git a/mysql-test/r/subselect4.result b/mysql-test/r/subselect4.result index ed1699c1409..ede353b7cbf 100644 --- a/mysql-test/r/subselect4.result +++ b/mysql-test/r/subselect4.result @@ -51,7 +51,7 @@ FROM t3 WHERE 1 = 0 GROUP BY 1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE 2 DEPENDENT SUBQUERY t1 index NULL PRIMARY 4 NULL 2 Using index -2 DEPENDENT SUBQUERY t2 index b b 5 NULL 2 Using where; Using index; Using join buffer +2 DEPENDENT SUBQUERY t2 index b b 5 NULL 2 Using where; Using index; Using join buffer (flat, BNL join) # should return 0 rows SELECT (SELECT 1 FROM t1,t2 WHERE t2.b > t3.b) @@ -241,7 +241,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5 1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where -2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) PREPARE stmt FROM "EXPLAIN SELECT EMPNAME FROM t1 WHERE EMPNUM IN @@ -256,13 +256,13 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5 1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where -2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5 1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where -2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) DEALLOCATE PREPARE stmt; DROP INDEX t1_IDX ON t1; CREATE INDEX t1_IDX ON t1(EMPNUM); @@ -279,7 +279,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5 1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where -2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) PREPARE stmt FROM "EXPLAIN SELECT EMPNAME FROM t1 WHERE EMPNUM IN @@ -294,13 +294,13 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5 1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where -2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5 1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where -2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) DEALLOCATE PREPARE stmt; DROP INDEX t1_IDX ON t1; EXPLAIN SELECT EMPNAME @@ -316,7 +316,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 5 1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where -2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) PREPARE stmt FROM "EXPLAIN SELECT EMPNAME FROM t1 WHERE EMPNUM IN @@ -331,13 +331,13 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 5 1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where -2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 1 SIMPLE subselect2 eq_ref unique_key unique_key 3 func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where -2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) DEALLOCATE PREPARE stmt; SET SESSION optimizer_switch = @old_optimizer_switch; SET SESSION join_cache_level = @old_join_cache_level; diff --git a/mysql-test/r/subselect_mat.result b/mysql-test/r/subselect_mat.result index 52795ec0f60..fc14d715f9c 100644 --- a/mysql-test/r/subselect_mat.result +++ b/mysql-test/r/subselect_mat.result @@ -423,7 +423,7 @@ where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and a1 = c1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where -1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer +1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join) 4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where 5 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index 2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where @@ -659,7 +659,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where 3 DEPENDENT SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where -3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer +3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join) 4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><concat(`test`.`t1`.`a1`,'x')>(<in_optimizer>(concat(`test`.`t1`.`a1`,'x'),<exists>(select 1 from `test`.`t1_16` where (<expr_cache><`test`.`t1_16`.`a2`,`test`.`t1_16`.`a1`>(<in_optimizer>((`test`.`t1_16`.`a1`,`test`.`t1_16`.`a2`),<exists>(select `test`.`t2_16`.`b1`,`test`.`t2_16`.`b2` from `test`.`t2_16` join `test`.`t2` where ((`test`.`t2`.`b2` = substr(`test`.`t2_16`.`b2`,1,6)) and <expr_cache><`test`.`t2`.`b1`>(<in_optimizer>(`test`.`t2`.`b1`,`test`.`t2`.`b1` in ( <materialize> (select `test`.`t3`.`c1` from `test`.`t3` where (`test`.`t3`.`c2` > '0') ), <primary_index_lookup>(`test`.`t2`.`b1` in <temporary table> on distinct_key where ((`test`.`t2`.`b1` = `materialized subselect`.`c1`)))))) and (<cache>(`test`.`t1_16`.`a1`) = `test`.`t2_16`.`b1`) and (<cache>(`test`.`t1_16`.`a2`) = `test`.`t2_16`.`b2`))))) and (<cache>(concat(`test`.`t1`.`a1`,'x')) = left(`test`.`t1_16`.`a1`,8)))))) @@ -1191,7 +1191,7 @@ SET @@optimizer_switch='default,semijoin=on,materialization=on'; EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 2 -1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) 2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2); COUNT(*) diff --git a/mysql-test/r/subselect_no_mat.result b/mysql-test/r/subselect_no_mat.result index 78e6467ae62..cf31257f8af 100644 --- a/mysql-test/r/subselect_no_mat.result +++ b/mysql-test/r/subselect_no_mat.result @@ -911,7 +911,7 @@ explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) F id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index 2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using index -2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` drop table t1,t2,t3; @@ -1301,7 +1301,7 @@ a explain extended select * from t2 where t2.a in (select a from t1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index -1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer +1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`) select * from t2 where t2.a in (select a from t1 where t1.b <> 30); @@ -1311,7 +1311,7 @@ a explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index -1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer +1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); @@ -1321,7 +1321,7 @@ a explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index -1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer +1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`b`)) @@ -1343,7 +1343,7 @@ a 4 explain extended select * from t2 where t2.a in (select a from t1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index 1 PRIMARY t1 ref a a 5 test.t2.a 101 100.00 Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where (`test`.`t1`.`a` = `test`.`t2`.`a`) @@ -1353,7 +1353,7 @@ a 4 explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index 1 PRIMARY t1 ref a a 5 test.t2.a 101 100.00 Using where; Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) @@ -1363,8 +1363,8 @@ a 3 explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index -1 PRIMARY t3 index a a 5 NULL 3 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index +1 PRIMARY t3 index a a 5 NULL 3 100.00 Using where; Using index 1 PRIMARY t1 ref a a 10 test.t2.a,test.t3.a 116 100.61 Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1` join `test`.`t3`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` = `test`.`t3`.`a`)) @@ -1380,7 +1380,7 @@ a 4 explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index 1 PRIMARY t1 ref a a 5 test.t2.a 101 100.00 Using where; Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) @@ -4207,7 +4207,7 @@ CREATE INDEX I1 ON t1 (a); CREATE INDEX I2 ON t1 (b); EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 index I1 I1 2 NULL 2 Using index; LooseScan +1 PRIMARY t1 index I1 I1 2 NULL 2 Using where; Using index; LooseScan 1 PRIMARY t1 ref I2 I2 13 test.t1.a 2 Using index condition SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1); a b @@ -4217,7 +4217,7 @@ CREATE INDEX I1 ON t2 (a); CREATE INDEX I2 ON t2 (b); EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t2 index I1 I1 4 NULL 2 Using index; LooseScan +1 PRIMARY t2 index I1 I1 4 NULL 2 Using where; Using index; LooseScan 1 PRIMARY t2 ref I2 I2 13 test.t2.a 2 Using index condition SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2); a b diff --git a/mysql-test/r/subselect_no_opts.result b/mysql-test/r/subselect_no_opts.result index d4b0e33f653..4fdcc7fa718 100644 --- a/mysql-test/r/subselect_no_opts.result +++ b/mysql-test/r/subselect_no_opts.result @@ -908,7 +908,7 @@ explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) F id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index 2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using index -2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` drop table t1,t2,t3; @@ -1318,7 +1318,7 @@ a explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index NULL PRIMARY 4 NULL 4 100.00 Using where; Using index -2 DEPENDENT SUBQUERY t1 eq_ref PRIMARY PRIMARY 4 func 1 100.00 +2 DEPENDENT SUBQUERY t1 eq_ref PRIMARY PRIMARY 4 func 1 100.00 Using where 2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))))) @@ -1362,7 +1362,7 @@ explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1 id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index NULL a 5 NULL 4 100.00 Using where; Using index 2 DEPENDENT SUBQUERY t1 ref a a 5 func 1001 100.00 Using index -2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 100.00 Using where; Using index; Using join buffer +2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 100.00 Using where; Using index; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))))) insert into t1 values (3,31); diff --git a/mysql-test/r/subselect_no_semijoin.result b/mysql-test/r/subselect_no_semijoin.result index f9ec2abade1..bc52f3ef9f5 100644 --- a/mysql-test/r/subselect_no_semijoin.result +++ b/mysql-test/r/subselect_no_semijoin.result @@ -908,7 +908,7 @@ explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) F id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index 2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using index -2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` drop table t1,t2,t3; @@ -1319,7 +1319,7 @@ explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1 id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index NULL PRIMARY 4 NULL 4 100.00 Using where; Using index 2 SUBQUERY t3 index PRIMARY PRIMARY 4 NULL 3 100.00 Using index -2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer +2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,`test`.`t2`.`a` in ( <materialize> (select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where (`test`.`t1`.`b` = `test`.`t3`.`a`) ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `materialized subselect`.`a`)))))) drop table t1, t2, t3; @@ -1362,7 +1362,7 @@ explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1 id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index NULL a 5 NULL 4 100.00 Using where; Using index 2 SUBQUERY t3 index a a 5 NULL 3 100.00 Using index -2 SUBQUERY t1 index NULL a 10 NULL 10004 100.00 Using where; Using index; Using join buffer +2 SUBQUERY t1 index NULL a 10 NULL 10004 100.00 Using where; Using index; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,`test`.`t2`.`a` in ( <materialize> (select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where (`test`.`t1`.`b` = `test`.`t3`.`a`) ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `materialized subselect`.`a`)))))) insert into t1 values (3,31); diff --git a/mysql-test/r/subselect_sj.result b/mysql-test/r/subselect_sj.result index f24b294fa90..0cdad381691 100644 --- a/mysql-test/r/subselect_sj.result +++ b/mysql-test/r/subselect_sj.result @@ -1,4 +1,5 @@ drop table if exists t0, t1, t2, t3, t4, t10, t11, t12; +set @save_optimizer_switch=@@optimizer_switch; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1(a int, b int); @@ -12,7 +13,7 @@ insert into t12 select * from t10; Flattened because of dependency, t10=func(t1) explain select * from t1 where a in (select pk from t10); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 3 +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index select * from t1 where a in (select pk from t10); a b @@ -39,7 +40,7 @@ select * from t1 where a in (select a from t11); a b explain select * from t1 where a in (select pk from t10) and b in (select pk from t10); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 3 +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index 1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index select * from t1 where a in (select pk from t10) and b in (select pk from t10); @@ -50,8 +51,8 @@ a b flattening a nested subquery explain select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12)); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 3 -1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where 1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 Using index select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12)); a b @@ -61,8 +62,8 @@ a b flattening subquery w/ several tables explain extended select * from t1 where a in (select t10.pk from t10, t12 where t12.pk=t10.a); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 -1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where +1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using where 1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 100.00 Using index Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t12` join `test`.`t1` where ((`test`.`t10`.`pk` = `test`.`t1`.`a`) and (`test`.`t12`.`pk` = `test`.`t10`.`a`)) @@ -100,75 +101,75 @@ t1 m10, t1 m11, t1 m12, t1 m13, t1 m14,t1 m15,t1 m16,t1 m17,t1 m18,t1 m19 ); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY s00 ALL NULL NULL NULL NULL 3 Using where -1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer +1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) 2 DEPENDENT SUBQUERY m00 ALL NULL NULL NULL NULL 3 Using where -2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10)) where t1.a < 5; @@ -194,7 +195,7 @@ insert into t1 select (A.a + 10 * B.a),1 from t0 A, t0 B; explain extended select * from t1 where a in (select pk from t10 where pk<3); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t10 range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index -1 PRIMARY t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t10`.`pk`) and (`test`.`t10`.`pk` < 3)) drop table t0, t1, t2; @@ -322,7 +323,8 @@ INSERT INTO WORKS VALUES ('E3','P2',20); INSERT INTO WORKS VALUES ('E4','P2',20); INSERT INTO WORKS VALUES ('E4','P4',40); INSERT INTO WORKS VALUES ('E4','P5',80); -set optimizer_switch='default,materialization=off'; +set optimizer_switch=@save_optimizer_switch; +set optimizer_switch='materialization=off'; explain SELECT EMPNUM, EMPNAME FROM STAFF WHERE EMPNUM IN @@ -344,7 +346,7 @@ E1 Alice E2 Betty E3 Carmen E4 Don -set optimizer_switch='default'; +set optimizer_switch=@save_optimizer_switch; drop table STAFF,WORKS,PROJ; # End of bug#45191 # @@ -450,7 +452,7 @@ COUNT(*) drop table t1, t2; drop view v1; drop procedure p1; -set SESSION optimizer_switch='default'; +set SESSION optimizer_switch=@save_optimizer_switch; # End of bug#46744 Bug#46797 "Crash in fix_semijoin_strategies_for_picked_join_order @@ -506,7 +508,7 @@ EXPLAIN EXTENDED SELECT vkey FROM t0 WHERE pk IN (SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t0 ALL PRIMARY NULL NULL NULL 5 100.00 -1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 +1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 Using where 1 PRIMARY t2 ref vkey vkey 4 test.t1.vnokey 2 100.00 Using index; FirstMatch(t1) Warnings: Note 1003 select `test`.`t0`.`vkey` AS `vkey` from `test`.`t0` `t1` semi join (`test`.`t0` `t2`) join `test`.`t0` where ((`test`.`t2`.`vkey` = `test`.`t1`.`vnokey`) and (`test`.`t1`.`pk` = `test`.`t0`.`pk`)) @@ -601,7 +603,7 @@ v1field DROP TABLE t1,t2; DROP VIEW v1,v2; DROP PROCEDURE p1; -set SESSION optimizer_switch='default'; +set SESSION optimizer_switch=@save_optimizer_switch; # End of BUG#48834 Bug#49097 subquery with view generates wrong result with @@ -736,7 +738,7 @@ WHERE int_nokey IN (SELECT it2.int_key FROM it1 LEFT JOIN it2 ON it2.datetime_key); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY it1 index NULL int_key 4 NULL 2 Using index; Start temporary -1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using join buffer +1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join) 1 PRIMARY it2 ALL NULL NULL NULL NULL 20 Using where; End temporary DROP TABLE ot1, it1, it2; # End of BUG#38075 @@ -768,7 +770,7 @@ select a from t1 where a in (select c from t2 where d >= some(select e from t3 where b=e)); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Start temporary -1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; End temporary; Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; End temporary; Using join buffer (flat, BNL join) 3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1 @@ -1075,3 +1077,4 @@ DROP TABLE t1; DROP TABLE t2; DROP TABLE t3; # End of Bug#48623 +set @@optimizer_switch=@save_optimizer_switch; diff --git a/mysql-test/r/subselect_sj2.result b/mysql-test/r/subselect_sj2.result index f17edf3be6c..e47d82de8a3 100644 --- a/mysql-test/r/subselect_sj2.result +++ b/mysql-test/r/subselect_sj2.result @@ -34,7 +34,7 @@ explain select * from t2 where b in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 3 1 PRIMARY t2 ref b b 5 test.t1.a 2 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 +2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 Using where select * from t2 where b in (select a from t1); a b 1 1 @@ -76,7 +76,7 @@ explain select * from t3 where b in (select a from t0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10 1 PRIMARY t3 ref b b 5 test.t0.a 1 -2 SUBQUERY t0 ALL NULL NULL NULL NULL 10 +2 SUBQUERY t0 ALL NULL NULL NULL NULL 10 Using where set @save_ecp= @@engine_condition_pushdown; set engine_condition_pushdown=0; select * from t3 where b in (select A.a+B.a from t0 A, t0 B where B.a<5); @@ -130,7 +130,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22 -1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer +1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer (flat, BNL join) 2 SUBQUERY it ALL NULL NULL NULL NULL 22 select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z @@ -198,7 +198,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22 -1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer +1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer (flat, BNL join) 2 SUBQUERY it ALL NULL NULL NULL NULL 22 select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z @@ -272,8 +272,8 @@ from t0 where a in (select t2.a+t3.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Start temporary -1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Using join buffer -1 PRIMARY t2 ref a a 5 test.t1.a 1 Using index +1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Using join buffer (flat, BNL join) +1 PRIMARY t2 ref a a 5 test.t1.a 1 Using where; Using index 1 PRIMARY t3 ref a a 5 test.t1.a 1 Using where; Using index; End temporary drop table t0, t1,t2,t3; CREATE TABLE t1 ( @@ -425,7 +425,7 @@ explain extended select * from t0 where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and t1.b=t2.b); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t0 ALL NULL NULL NULL NULL 5 100.00 +1 PRIMARY t0 ALL NULL NULL NULL NULL 5 100.00 Using where 1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Start temporary 1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 100.00 Using where; End temporary Warnings: diff --git a/mysql-test/r/subselect_sj2_jcl6.result b/mysql-test/r/subselect_sj2_jcl6.result index 67215d1715e..1f7a9d4b9a0 100644 --- a/mysql-test/r/subselect_sj2_jcl6.result +++ b/mysql-test/r/subselect_sj2_jcl6.result @@ -1,3 +1,6 @@ +set @save_optimizer_switch_jcl6=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; set join_cache_level=6; show variables like 'join_cache_level'; Variable_name Value @@ -37,8 +40,8 @@ a b explain select * from t2 where b in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 3 -1 PRIMARY t2 ref b b 5 test.t1.a 2 Using join buffer -2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 +1 PRIMARY t2 ref b b 5 test.t1.a 2 Using join buffer (flat, BKA join) +2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 Using where select * from t2 where b in (select a from t1); a b 1 1 @@ -56,7 +59,7 @@ insert into t3 select a,a, a,a,a from t0; explain select * from t3 where b in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t3 ALL b NULL NULL NULL 10 -1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; FirstMatch(t3); Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; FirstMatch(t3); Using join buffer (flat, BNL join) select * from t3 where b in (select a from t1); a b pk1 pk2 pk3 1 1 1 1 1 @@ -79,8 +82,8 @@ from t0 A, t0 B where B.a <5; explain select * from t3 where b in (select a from t0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10 -1 PRIMARY t3 ref b b 5 test.t0.a 1 Using join buffer -2 SUBQUERY t0 ALL NULL NULL NULL NULL 10 +1 PRIMARY t3 ref b b 5 test.t0.a 1 Using join buffer (flat, BKA join) +2 SUBQUERY t0 ALL NULL NULL NULL NULL 10 Using where set @save_ecp= @@engine_condition_pushdown; set engine_condition_pushdown=0; select * from t3 where b in (select A.a+B.a from t0 A, t0 B where B.a<5); @@ -134,7 +137,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22 -1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer +1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer (flat, BNL join) 2 SUBQUERY it ALL NULL NULL NULL NULL 22 select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z @@ -202,7 +205,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22 -1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer +1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer (flat, BNL join) 2 SUBQUERY it ALL NULL NULL NULL NULL 22 select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z @@ -276,8 +279,8 @@ from t0 where a in (select t2.a+t3.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Start temporary -1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Using join buffer -1 PRIMARY t2 ref a a 5 test.t1.a 1 Using index +1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Using join buffer (flat, BNL join) +1 PRIMARY t2 ref a a 5 test.t1.a 1 Using where; Using index 1 PRIMARY t3 ref a a 5 test.t1.a 1 Using where; Using index; End temporary drop table t0, t1,t2,t3; CREATE TABLE t1 ( @@ -315,8 +318,8 @@ WHERE Language='English' AND Percentage > 10 AND t2.Population > 100000); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 range Population,Country Population 4 NULL 1 Using index condition; Using MRR -1 PRIMARY t3 eq_ref PRIMARY,Percentage PRIMARY 33 test.t1.Country,const 1 Using index condition; Using where; Using join buffer -1 PRIMARY t2 eq_ref PRIMARY,Population PRIMARY 3 test.t3.Country 1 Using index condition(BKA); Using where; Using join buffer +1 PRIMARY t3 eq_ref PRIMARY,Percentage PRIMARY 33 test.t1.Country,const 1 Using index condition; Using where; Using join buffer (flat, BKA join) +1 PRIMARY t2 eq_ref PRIMARY,Population PRIMARY 3 test.t3.Country 1 Using index condition(BKA); Using where; Using join buffer (incremental, BKA join) DROP TABLE t1,t2,t3; CREATE TABLE t1 ( Code char(3) NOT NULL DEFAULT '', @@ -429,9 +432,9 @@ explain extended select * from t0 where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and t1.b=t2.b); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t0 ALL NULL NULL NULL NULL 5 100.00 Start temporary -1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Using join buffer -1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 100.00 Using where; End temporary; Using join buffer +1 PRIMARY t0 ALL NULL NULL NULL NULL 5 100.00 Using where; Start temporary +1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Using join buffer (flat, BKA join) +1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 100.00 Using where; End temporary; Using join buffer (incremental, BKA join) Warnings: Note 1276 Field or reference 'test.t0.a' of SELECT #2 was resolved in SELECT #1 Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) join `test`.`t0` where ((`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t1`.`a` = `test`.`t0`.`a`) and (`test`.`t2`.`a` = `test`.`t0`.`a`)) @@ -584,7 +587,7 @@ explain select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3)); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 -1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) 2 DEPENDENT SUBQUERY t3 unique_subquery PRIMARY PRIMARY 4 func 1 Using index drop table t0, t1, t2, t3; create table t1 (a int); @@ -725,11 +728,12 @@ c2 in (select 1 from t3, t2) and c1 in (select convert(c6,char(1)) from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where -1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using join buffer -1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer -1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch(t2); Using join buffer +1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join) +1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join) +1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch(t2); Using join buffer (incremental, BNL join) drop table t2, t3; set join_cache_level=default; show variables like 'join_cache_level'; Variable_name Value join_cache_level 1 +set @@optimizer_switch=@save_optimizer_switch_jcl6; diff --git a/mysql-test/r/subselect_sj_jcl6.result b/mysql-test/r/subselect_sj_jcl6.result index 40687d301d3..607bf1e0134 100644 --- a/mysql-test/r/subselect_sj_jcl6.result +++ b/mysql-test/r/subselect_sj_jcl6.result @@ -1,8 +1,12 @@ +set @save_optimizer_switch_jcl6=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; set join_cache_level=6; show variables like 'join_cache_level'; Variable_name Value join_cache_level 6 drop table if exists t0, t1, t2, t3, t4, t10, t11, t12; +set @save_optimizer_switch=@@optimizer_switch; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1(a int, b int); @@ -16,7 +20,7 @@ insert into t12 select * from t10; Flattened because of dependency, t10=func(t1) explain select * from t1 where a in (select pk from t10); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 3 +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index select * from t1 where a in (select pk from t10); a b @@ -43,7 +47,7 @@ select * from t1 where a in (select a from t11); a b explain select * from t1 where a in (select pk from t10) and b in (select pk from t10); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 3 +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index 1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index select * from t1 where a in (select pk from t10) and b in (select pk from t10); @@ -54,8 +58,8 @@ a b flattening a nested subquery explain select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12)); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 3 -1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer (flat, BKA join) 1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 Using index select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12)); a b @@ -65,8 +69,8 @@ a b flattening subquery w/ several tables explain extended select * from t1 where a in (select t10.pk from t10, t12 where t12.pk=t10.a); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 -1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where +1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using where; Using join buffer (flat, BKA join) 1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 100.00 Using index Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t12` join `test`.`t1` where ((`test`.`t10`.`pk` = `test`.`t1`.`a`) and (`test`.`t12`.`pk` = `test`.`t10`.`a`)) @@ -75,8 +79,8 @@ explAin extended select * from t1 left join (t2 A, t2 B) on ( A.A= t1.A And B.A in (select pk from t10)); id select_type tABle type possiBle_keys key key_len ref rows filtered ExtrA 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 -1 PRIMARY A ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer -1 PRIMARY B ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer +1 PRIMARY A ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer (flAt, BNL join) +1 PRIMARY B ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer (incrementAl, BNL join) 2 DEPENDENT SUBQUERY t10 unique_suBquery PRIMARY PRIMARY 4 func 1 100.00 Using index Warnings: Note 1003 select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`A`.`A` AS `A`,`test`.`A`.`B` AS `B`,`test`.`B`.`A` AS `A`,`test`.`B`.`B` AS `B` from `test`.`t1` left join (`test`.`t2` `A` join `test`.`t2` `B`) on((<in_optimizer>(`test`.`B`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`B`.`A`) in t10 on PRIMARY))) And (`test`.`A`.`A` = `test`.`t1`.`A`))) where 1 @@ -85,7 +89,7 @@ explAin extended select * from t1 left join t2 on (t2.A= t1.A And t2.A in (select pk from t10)); id select_type tABle type possiBle_keys key key_len ref rows filtered ExtrA 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 -1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer +1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer (flAt, BNL join) 2 DEPENDENT SUBQUERY t10 unique_suBquery PRIMARY PRIMARY 4 func 1 100.00 Using index Warnings: Note 1003 select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`t2`.`A` AS `A`,`test`.`t2`.`B` AS `B` from `test`.`t1` left join `test`.`t2` on((<in_optimizer>(`test`.`t2`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`t2`.`A`) in t10 on PRIMARY))) And (`test`.`t2`.`A` = `test`.`t1`.`A`))) where 1 @@ -104,75 +108,75 @@ t1 m10, t1 m11, t1 m12, t1 m13, t1 m14,t1 m15,t1 m16,t1 m17,t1 m18,t1 m19 ); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY s00 ALL NULL NULL NULL NULL 3 Using where -1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer -1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer +1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m00 ALL NULL NULL NULL NULL 3 Using where -2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer -2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) +2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (incremental, BNL join) select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10)) where t1.a < 5; @@ -198,7 +202,7 @@ insert into t1 select (A.a + 10 * B.a),1 from t0 A, t0 B; explain extended select * from t1 where a in (select pk from t10 where pk<3); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t10 range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index -1 PRIMARY t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t10`.`pk`) and (`test`.`t10`.`pk` < 3)) drop table t0, t1, t2; @@ -326,7 +330,8 @@ INSERT INTO WORKS VALUES ('E3','P2',20); INSERT INTO WORKS VALUES ('E4','P2',20); INSERT INTO WORKS VALUES ('E4','P4',40); INSERT INTO WORKS VALUES ('E4','P5',80); -set optimizer_switch='default,materialization=off'; +set optimizer_switch=@save_optimizer_switch; +set optimizer_switch='materialization=off'; explain SELECT EMPNUM, EMPNAME FROM STAFF WHERE EMPNUM IN @@ -335,8 +340,8 @@ WHERE PNUM IN (SELECT PNUM FROM PROJ)); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY STAFF ALL NULL NULL NULL NULL 5 -1 PRIMARY PROJ ALL NULL NULL NULL NULL 6 Using join buffer -1 PRIMARY WORKS ALL NULL NULL NULL NULL 12 Using where; FirstMatch(STAFF); Using join buffer +1 PRIMARY PROJ ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join) +1 PRIMARY WORKS ALL NULL NULL NULL NULL 12 Using where; FirstMatch(STAFF); Using join buffer (incremental, BNL join) SELECT EMPNUM, EMPNAME FROM STAFF WHERE EMPNUM IN @@ -348,7 +353,7 @@ E1 Alice E2 Betty E3 Carmen E4 Don -set optimizer_switch='default'; +set optimizer_switch=@save_optimizer_switch; drop table STAFF,WORKS,PROJ; # End of bug#45191 # @@ -454,7 +459,7 @@ COUNT(*) drop table t1, t2; drop view v1; drop procedure p1; -set SESSION optimizer_switch='default'; +set SESSION optimizer_switch=@save_optimizer_switch; # End of bug#46744 Bug#46797 "Crash in fix_semijoin_strategies_for_picked_join_order @@ -510,7 +515,7 @@ EXPLAIN EXTENDED SELECT vkey FROM t0 WHERE pk IN (SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t0 ALL PRIMARY NULL NULL NULL 5 100.00 -1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 Using join buffer +1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 Using where; Using join buffer (flat, BKA join) 1 PRIMARY t2 ref vkey vkey 4 test.t1.vnokey 2 100.00 Using index; FirstMatch(t1) Warnings: Note 1003 select `test`.`t0`.`vkey` AS `vkey` from `test`.`t0` `t1` semi join (`test`.`t0` `t2`) join `test`.`t0` where ((`test`.`t2`.`vkey` = `test`.`t1`.`vnokey`) and (`test`.`t1`.`pk` = `test`.`t0`.`pk`)) @@ -605,7 +610,7 @@ v1field DROP TABLE t1,t2; DROP VIEW v1,v2; DROP PROCEDURE p1; -set SESSION optimizer_switch='default'; +set SESSION optimizer_switch=@save_optimizer_switch; # End of BUG#48834 Bug#49097 subquery with view generates wrong result with @@ -718,7 +723,6 @@ WHERE int_nokey IN (SELECT it2.int_key FROM it1 LEFT JOIN it2 ON it2.datetime_key); int_key 0 -8 2 0 7 @@ -729,10 +733,11 @@ int_key 0 0 0 -0 3 7 7 +8 +0 5 EXPLAIN SELECT int_key FROM ot1 @@ -740,8 +745,8 @@ WHERE int_nokey IN (SELECT it2.int_key FROM it1 LEFT JOIN it2 ON it2.datetime_key); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY it1 index NULL int_key 4 NULL 2 Using index; Start temporary -1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using join buffer -1 PRIMARY it2 ALL NULL NULL NULL NULL 20 Using where; End temporary; Using join buffer +1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join) +1 PRIMARY it2 ALL NULL NULL NULL NULL 20 Using where; End temporary; Using join buffer (incremental, BNL join) DROP TABLE ot1, it1, it2; # End of BUG#38075 # @@ -772,7 +777,7 @@ select a from t1 where a in (select c from t2 where d >= some(select e from t3 where b=e)); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Start temporary -1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; End temporary; Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; End temporary; Using join buffer (flat, BNL join) 3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1 @@ -823,7 +828,7 @@ pk EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, c) IN (SELECT b, c FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 -1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer +1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`c` = `test`.`t1`.`c`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, c) IN (SELECT b, c FROM t2 WHERE pk > 0); @@ -833,7 +838,7 @@ pk EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, d) IN (SELECT b, d FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 -1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer +1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`d` = `test`.`t1`.`d`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, d) IN (SELECT b, d FROM t2 WHERE pk > 0); @@ -842,7 +847,7 @@ pk EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, e) IN (SELECT b, e FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 -1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer +1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`e` = `test`.`t1`.`e`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, e) IN (SELECT b, e FROM t2 WHERE pk > 0); @@ -852,7 +857,7 @@ pk EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, f) IN (SELECT b, f FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 -1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer +1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`f` = `test`.`t1`.`f`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, f) IN (SELECT b, f FROM t2 WHERE pk > 0); @@ -862,7 +867,7 @@ pk EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, g) IN (SELECT b, g FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 -1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer +1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`g` = `test`.`t1`.`g`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, g) IN (SELECT b, g FROM t2 WHERE pk > 0); @@ -872,7 +877,7 @@ pk EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, h) IN (SELECT b, h FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 -1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer +1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`h` = `test`.`t1`.`h`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, h) IN (SELECT b, h FROM t2 WHERE pk > 0); @@ -882,7 +887,7 @@ pk EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, i) IN (SELECT b, i FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 -1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer +1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`i` = `test`.`t1`.`i`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, i) IN (SELECT b, i FROM t2 WHERE pk > 0); @@ -892,7 +897,7 @@ pk EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, j) IN (SELECT b, j FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 -1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer +1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`j` = `test`.`t1`.`j`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, j) IN (SELECT b, j FROM t2 WHERE pk > 0); @@ -902,7 +907,7 @@ pk EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, k) IN (SELECT b, k FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 -1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer +1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Using MRR; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`k` = `test`.`t1`.`k`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, k) IN (SELECT b, k FROM t2 WHERE pk > 0); @@ -1064,8 +1069,8 @@ AND t1.val IN (SELECT t3.val FROM t3 WHERE t3.val LIKE 'a%' OR t3.val LIKE 'e%'); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 5 -1 PRIMARY t3 ALL NULL NULL NULL NULL 5 Using where; FirstMatch(t1); Using join buffer -1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; FirstMatch(t3); Using join buffer +1 PRIMARY t3 ALL NULL NULL NULL NULL 5 Using where; FirstMatch(t1); Using join buffer (flat, BNL join) +1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; FirstMatch(t3); Using join buffer (incremental, BNL join) SELECT * FROM t1 WHERE t1.val IN (SELECT t2.val FROM t2 @@ -1079,6 +1084,7 @@ DROP TABLE t1; DROP TABLE t2; DROP TABLE t3; # End of Bug#48623 +set @@optimizer_switch=@save_optimizer_switch; # # BUG#49129: Wrong result with IN-subquery with join_cache_level=6 and firstmatch=off # @@ -1097,9 +1103,9 @@ explain SELECT * FROM t0 WHERE t0.a IN (SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t0 ALL NULL NULL NULL NULL 5 Start temporary -1 PRIMARY t1 ref a a 5 test.t0.a 1 Using join buffer -1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 Using where; End temporary; Using join buffer +1 PRIMARY t0 ALL NULL NULL NULL NULL 5 Using where; Start temporary +1 PRIMARY t1 ref a a 5 test.t0.a 1 Using join buffer (flat, BKA join) +1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 Using where; End temporary; Using join buffer (incremental, BKA join) SELECT * FROM t0 WHERE t0.a IN (SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b); a @@ -1114,3 +1120,4 @@ set join_cache_level=default; show variables like 'join_cache_level'; Variable_name Value join_cache_level 1 +set @@optimizer_switch=@save_optimizer_switch_jcl6; diff --git a/mysql-test/r/table_elim.result b/mysql-test/r/table_elim.result index 6da1e716efa..16799e65a00 100644 --- a/mysql-test/r/table_elim.result +++ b/mysql-test/r/table_elim.result @@ -26,17 +26,17 @@ a explain select * from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where # This will not be eliminated as t2.b is in in order list: explain select t1.a from t1 left join t2 on t2.a=t1.a order by t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary; Using filesort -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where # This will not be eliminated as t2.b is in group list: explain select t1.a from t1 left join t2 on t2.a=t1.a group by t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary; Using filesort -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where # This will not be eliminated as t2.b is in the WHERE explain select t1.a from t1 left join t2 on t2.a=t1.a where t2.b < 3 or t2.b is null; id select_type table type possible_keys key key_len ref rows Extra @@ -75,7 +75,7 @@ This must not use elimination: explain select count(1) from t1 left join t2 on t2.a=t1.a group by t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary; Using filesort -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using index drop table t0, t1, t2, t3; create table t0 ( id integer, primary key (id)); create table t1 ( @@ -128,7 +128,7 @@ Note 1003 select `f`.`id` AS `id` from `test`.`t0` `f` where (`f`.`id` in (1,2,3 This should use facts and a1 tables: explain extended select id from v1 where attr1 between 12 and 14; id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY a1 range PRIMARY,attr1 attr1 5 NULL 2 100.00 Using index condition; Using MRR +1 PRIMARY a1 range PRIMARY,attr1 attr1 5 NULL 2 100.00 Using index condition; Using where; Using MRR 1 PRIMARY f eq_ref PRIMARY PRIMARY 4 test.a1.id 1 100.00 Using index Warnings: Note 1276 Field or reference 'test.a2.id' of SELECT #3 was resolved in SELECT #1 @@ -156,7 +156,7 @@ Note 1003 select `f`.`id` AS `id` from `test`.`t0` `f` where (`f`.`id` in (1,2,3 This should use facts and a1 tables: explain extended select id from v2 where attr1 between 12 and 14; id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY a1 range PRIMARY,attr1 attr1 5 NULL 2 100.00 Using index condition; Using MRR +1 PRIMARY a1 range PRIMARY,attr1 attr1 5 NULL 2 100.00 Using index condition; Using where; Using MRR 1 PRIMARY f eq_ref PRIMARY PRIMARY 4 test.a1.id 1 100.00 Using index Warnings: Note 1276 Field or reference 'test.f.id' of SELECT #3 was resolved in SELECT #1 @@ -164,7 +164,7 @@ Note 1003 select `f`.`id` AS `id` from `test`.`t0` `f` join `test`.`t1` `a1` whe This should use facts, a2 and its subquery: explain extended select id from v2 where attr2 between 12 and 14; id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY a2 range PRIMARY,attr2 attr2 5 NULL 5 100.00 Using index condition; Using MRR +1 PRIMARY a2 range PRIMARY,attr2 attr2 5 NULL 5 100.00 Using index condition; Using where; Using MRR 1 PRIMARY f eq_ref PRIMARY PRIMARY 4 test.a2.id 1 100.00 Using where; Using index 3 DEPENDENT SUBQUERY t2 ref PRIMARY PRIMARY 4 test.f.id 2 100.00 Using index Warnings: @@ -217,7 +217,7 @@ explain select t1.*, t2.* from t1 left join (t2 left join t3 on t3.pk=t2.col) on t2.pk=t1.col; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.col 1 +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.col 1 Using where explain select t1.* from t1 left join ( t2 left join t3 on t3.pk=t2.col or t3.pk=t2.col) @@ -232,7 +232,7 @@ t1 left join on t2.pk=t1.col or t2.pk=t1.col; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.col 1 +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.col 1 Using where drop table t1, t2, t3; # # Check things that look like functional dependencies but really are not diff --git a/mysql-test/r/table_elim_debug.result b/mysql-test/r/table_elim_debug.result index b059baffa89..ae49b1433fd 100644 --- a/mysql-test/r/table_elim_debug.result +++ b/mysql-test/r/table_elim_debug.result @@ -10,7 +10,7 @@ set optimizer_switch='table_elimination=off'; explain select t1.a from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 -1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using index set optimizer_switch='table_elimination=on'; explain select t1.a from t1 left join t2 on t2.a=t1.a; id select_type table type possible_keys key key_len ref rows Extra diff --git a/mysql-test/r/union.result b/mysql-test/r/union.result index 15387b59c4d..cd3091b072b 100644 --- a/mysql-test/r/union.result +++ b/mysql-test/r/union.result @@ -542,7 +542,7 @@ explain (select * from t1 where a=1 and b=10) union (select straight_join t1.a,t id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 2 UNION t1 index PRIMARY PRIMARY 4 NULL 4 Using index -2 UNION t2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index; Using join buffer +2 UNION t2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index; Using join buffer (flat, BNL join) NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL explain (select * from t1 where a=1) union (select * from t1 where b=1); id select_type table type possible_keys key key_len ref rows Extra diff --git a/mysql-test/r/view.result b/mysql-test/r/view.result index 29c3fc4d901..3615276a56c 100644 --- a/mysql-test/r/view.result +++ b/mysql-test/r/view.result @@ -2341,16 +2341,16 @@ CREATE VIEW v1 AS SELECT t1.* FROM t1,t2 WHERE t1.a=t2.a AND t1.b=t2.b; CREATE VIEW v2 AS SELECT t3.* FROM t1,t3 WHERE t1.a=t3.a; EXPLAIN SELECT t1.* FROM t1 JOIN t2 WHERE t1.a=t2.a AND t1.b=t2.b AND t1.a=1; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ref a a 5 const 1 Using index +1 SIMPLE t1 ref a a 5 const 1 Using where; Using index 1 SIMPLE t2 ref a a 10 const,test.t1.b 1 Using index EXPLAIN SELECT * FROM v1 WHERE a=1; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ref a a 5 const 1 Using index +1 SIMPLE t1 ref a a 5 const 1 Using where; Using index 1 SIMPLE t2 ref a a 10 const,test.t1.b 1 Using index EXPLAIN SELECT * FROM v2 WHERE a=1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref a a 5 const 1 Using index -1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) DROP VIEW v1,v2; DROP TABLE t1,t2,t3; create table t1 (f1 int); diff --git a/mysql-test/suite/innodb/r/innodb_gis.result b/mysql-test/suite/innodb/r/innodb_gis.result index c6c775afc9f..e44f2aec093 100644 --- a/mysql-test/suite/innodb/r/innodb_gis.result +++ b/mysql-test/suite/innodb/r/innodb_gis.result @@ -403,7 +403,7 @@ Intersects(g1.g, g2.g) as i, Crosses(g1.g, g2.g) as r FROM gis_geometrycollection g1, gis_geometrycollection g2 ORDER BY first, second; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE g1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort -1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +1 SIMPLE g2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`g1`.`fid` AS `first`,`test`.`g2`.`fid` AS `second`,within(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `w`,contains(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `c`,overlaps(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `o`,equals(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `e`,disjoint(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `d`,touches(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `t`,intersects(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `i`,crosses(`test`.`g1`.`g`,`test`.`g2`.`g`) AS `r` from `test`.`gis_geometrycollection` `g1` join `test`.`gis_geometrycollection` `g2` order by `test`.`g1`.`fid`,`test`.`g2`.`fid` DROP TABLE gis_point, gis_line, gis_polygon, gis_multi_point, gis_multi_line, gis_multi_polygon, gis_geometrycollection, gis_geometry; diff --git a/mysql-test/suite/innodb/r/innodb_mysql.result b/mysql-test/suite/innodb/r/innodb_mysql.result index 1e8bc42ecbf..ebf714b2868 100644 --- a/mysql-test/suite/innodb/r/innodb_mysql.result +++ b/mysql-test/suite/innodb/r/innodb_mysql.result @@ -187,7 +187,7 @@ min(7) explain select min(7) from t2i join t1i; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2i ALL NULL NULL NULL NULL 1 -1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer +1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join) select min(7) from t2i join t1i; min(7) NULL @@ -203,7 +203,7 @@ max(7) explain select max(7) from t2i join t1i; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2i ALL NULL NULL NULL NULL 1 -1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer +1 SIMPLE t1i ALL NULL NULL NULL NULL 1 Using join buffer (flat, BNL join) select max(7) from t2i join t1i; max(7) NULL @@ -2519,3 +2519,59 @@ ALTER TABLE t1 COMMENT 'test'; UNLOCK TABLES; DROP TABLE t1; End of 5.1 tests +# +# Bug #663818: wrong result when BNLH is used +# +CREATE TABLE t1(pk int NOT NULL PRIMARY KEY) ENGINE=InnoDB; +INSERT INTO t1 VALUES +(1), (2), (11), (12), (13), (14), +(15), (16), (17), (18), (19); +CREATE TABLE t2(pk int NOT NULL PRIMARY KEY) ENGINE=InnoDB; +INSERT INTO t2 VALUES +(1), (10), (11), (12), (13), (14), +(15), (16), (17), (18), (19), (20), (21); +SET SESSION join_buffer_size=10000; +SET SESSION join_cache_level=3; +EXPLAIN +SELECT t1.pk FROM t1,t2 +WHERE t1.pk = t2.pk AND t2.pk <> 8; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 11 Using where; Using index +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.pk 1 Using index; Using join buffer (flat, BNLH join) +SELECT t1.pk FROM t1,t2 +WHERE t1.pk = t2.pk AND t2.pk <> 8; +pk +1 +11 +12 +13 +14 +15 +16 +17 +18 +19 +SET SESSION join_cache_level=1; +EXPLAIN +SELECT t1.pk FROM t1,t2 +WHERE t1.pk = t2.pk AND t2.pk <> 8; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 11 Using where; Using index +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.pk 1 Using index +SELECT t1.pk FROM t1,t2 +WHERE t1.pk = t2.pk AND t2.pk <> 8; +pk +1 +11 +12 +13 +14 +15 +16 +17 +18 +19 +DROP TABLE t1,t2; +SET SESSION join_cache_level=DEFAULT; +SET SESSION join_buffer_size=DEFAULT; +End of 5.3 tests diff --git a/mysql-test/suite/innodb/t/innodb_mysql.test b/mysql-test/suite/innodb/t/innodb_mysql.test index 1171eaa899c..35353b744e8 100644 --- a/mysql-test/suite/innodb/t/innodb_mysql.test +++ b/mysql-test/suite/innodb/t/innodb_mysql.test @@ -769,3 +769,39 @@ DROP TABLE t1; --echo End of 5.1 tests + +--echo # +--echo # Bug #663818: wrong result when BNLH is used +--echo # + +CREATE TABLE t1(pk int NOT NULL PRIMARY KEY) ENGINE=InnoDB; +INSERT INTO t1 VALUES + (1), (2), (11), (12), (13), (14), + (15), (16), (17), (18), (19); +CREATE TABLE t2(pk int NOT NULL PRIMARY KEY) ENGINE=InnoDB; +INSERT INTO t2 VALUES + (1), (10), (11), (12), (13), (14), + (15), (16), (17), (18), (19), (20), (21); + +SET SESSION join_buffer_size=10000; + +SET SESSION join_cache_level=3; +EXPLAIN +SELECT t1.pk FROM t1,t2 + WHERE t1.pk = t2.pk AND t2.pk <> 8; +SELECT t1.pk FROM t1,t2 + WHERE t1.pk = t2.pk AND t2.pk <> 8; + +SET SESSION join_cache_level=1; +EXPLAIN +SELECT t1.pk FROM t1,t2 + WHERE t1.pk = t2.pk AND t2.pk <> 8; +SELECT t1.pk FROM t1,t2 + WHERE t1.pk = t2.pk AND t2.pk <> 8; + +DROP TABLE t1,t2; + +SET SESSION join_cache_level=DEFAULT; +SET SESSION join_buffer_size=DEFAULT; + +--echo End of 5.3 tests diff --git a/mysql-test/suite/maria/r/maria.result b/mysql-test/suite/maria/r/maria.result index f6e3777a0b6..2463bba1db4 100644 --- a/mysql-test/suite/maria/r/maria.result +++ b/mysql-test/suite/maria/r/maria.result @@ -381,7 +381,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref a a 4 test.t2.a 3 explain select * from t1,t2 where t1.b=t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL b NULL NULL NULL 2 +1 SIMPLE t2 ALL b NULL NULL NULL 2 Using where 1 SIMPLE t1 ref b b 5 test.t2.b 1 explain select * from t1,t2 force index(c) where t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra diff --git a/mysql-test/suite/pbxt/r/derived.result b/mysql-test/suite/pbxt/r/derived.result index fb723c45c0f..56d2f8ac929 100644 --- a/mysql-test/suite/pbxt/r/derived.result +++ b/mysql-test/suite/pbxt/r/derived.result @@ -58,7 +58,7 @@ a b a b explain select * from t1 as x1, (select * from t1) as x2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY x1 ALL NULL NULL NULL NULL 4 -1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 Using join buffer +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 Using join buffer (flat, BNL join) 2 DERIVED t1 ALL NULL NULL NULL NULL 4 drop table if exists t2,t3; select * from (select 1) as a; @@ -115,7 +115,7 @@ explain select * from (select t1.*, t2.a as t2a from t1,t2 where t1.a=t2.a) t1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> system NULL NULL NULL NULL 1 2 DERIVED t2 ALL NULL NULL NULL NULL 1 -2 DERIVED t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer +2 DERIVED t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) drop table t1, t2; create table t1(a int not null, t char(8), index(a)); SELECT * FROM (SELECT * FROM t1) as b ORDER BY a ASC LIMIT 0,20; @@ -143,7 +143,7 @@ a t explain select count(*) from t1 as tt1, (select * from t1) as tt2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY tt1 index NULL a 4 NULL 10000 Using index -1 PRIMARY <derived2> ALL NULL NULL NULL NULL 10000 Using join buffer +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 10000 Using join buffer (flat, BNL join) 2 DERIVED t1 ALL NULL NULL NULL NULL 10000 drop table t1; SELECT * FROM (SELECT (SELECT * FROM (SELECT 1 as a) as a )) as b; @@ -190,13 +190,13 @@ pla_id test explain SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY m2 ALL NULL NULL NULL NULL 9 -1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort 2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1 explain SELECT STRAIGHT_JOIN d.pla_id, m2.test FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY m2 ALL NULL NULL NULL NULL 9 -1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort 2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1 drop table t1,t2; @@ -250,7 +250,7 @@ a a explain select * from ( select * from t1 union select * from t1) a,(select * from t1 union select * from t1) b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 -1 PRIMARY <derived4> ALL NULL NULL NULL NULL 2 Using join buffer +1 PRIMARY <derived4> ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join) 4 DERIVED t1 ALL NULL NULL NULL NULL 2 5 UNION t1 ALL NULL NULL NULL NULL 2 NULL UNION RESULT <union4,5> ALL NULL NULL NULL NULL NULL @@ -317,7 +317,7 @@ explain SELECT s.name, AVG(s.val) AS median FROM (SELECT x.name, x.val FROM t1 x id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 Using temporary; Using filesort 2 DERIVED x ALL NULL NULL NULL NULL 17 Using temporary; Using filesort -2 DERIVED y ALL NULL NULL NULL NULL 17 Using where; Using join buffer +2 DERIVED y ALL NULL NULL NULL NULL 17 Using where; Using join buffer (flat, BNL join) drop table t1; create table t2 (a int, b int, primary key (a)); insert into t2 values (1,7),(2,7); diff --git a/mysql-test/suite/pbxt/r/distinct.result b/mysql-test/suite/pbxt/r/distinct.result index d95a2bb3232..f821023f03a 100644 --- a/mysql-test/suite/pbxt/r/distinct.result +++ b/mysql-test/suite/pbxt/r/distinct.result @@ -173,7 +173,7 @@ INSERT INTO t2 values (1),(2),(3); INSERT INTO t3 VALUES (1,'1'),(2,'2'),(1,'1'),(2,'2'); explain SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 Using temporary +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 Using where; Using temporary 1 SIMPLE t2 ref a a 4 test.t1.a 1 Using index 1 SIMPLE t3 ref a a 5 test.t1.b 1 Using index SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a; @@ -300,11 +300,11 @@ WHERE AND ((t1.id=j_lj_t3.id AND t3_lj.id IS NULL) OR (t1.id=t3.id AND t3.idx=2)); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index id id 4 NULL 2 Using index; Using temporary -1 SIMPLE t2 index id id 8 NULL 1 Using index; Distinct; Using join buffer -1 SIMPLE t3 index id id 8 NULL 1 Using index; Distinct; Using join buffer -1 SIMPLE j_lj_t2 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer +1 SIMPLE t2 index id id 8 NULL 1 Using index; Distinct; Using join buffer (flat, BNL join) +1 SIMPLE t3 index id id 8 NULL 1 Using index; Distinct; Using join buffer (flat, BNL join) +1 SIMPLE j_lj_t2 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer (flat, BNL join) 1 SIMPLE t2_lj ref id id 4 test.j_lj_t2.id 1 Using where; Using index; Distinct -1 SIMPLE j_lj_t3 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer +1 SIMPLE j_lj_t3 index id id 4 NULL 2 Using where; Using index; Distinct; Using join buffer (flat, BNL join) 1 SIMPLE t3_lj ref id id 4 test.j_lj_t3.id 1 Using where; Using index; Distinct SELECT DISTINCT t1.id @@ -515,7 +515,7 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT DISTINCT t1_1.a, t1_1.b FROM t1 t1_1, t1 t1_2; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1_1 ALL NULL NULL NULL NULL 3 Using temporary -1 SIMPLE t1_2 index NULL PRIMARY 4 NULL 3 Using index; Distinct; Using join buffer +1 SIMPLE t1_2 index NULL PRIMARY 4 NULL 3 Using index; Distinct; Using join buffer (flat, BNL join) EXPLAIN SELECT DISTINCT t1_1.a, t1_1.b FROM t1 t1_1, t1 t1_2 WHERE t1_1.a = t1_2.a; id select_type table type possible_keys key key_len ref rows Extra diff --git a/mysql-test/suite/pbxt/r/func_group.result b/mysql-test/suite/pbxt/r/func_group.result index 339defca9b5..dc6ea214084 100644 --- a/mysql-test/suite/pbxt/r/func_group.result +++ b/mysql-test/suite/pbxt/r/func_group.result @@ -614,7 +614,7 @@ explain select max(t1.a3), min(t2.a2) from t1, t2 where t1.a2 = 2 and t1.a3 < 'MIN' and t2.a3 > 'CA'; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range k1 k1 7 NULL 1 Using where; Using index -1 SIMPLE t2 range k1 k1 3 NULL 1 Using where; Using index; Using join buffer +1 SIMPLE t2 range k1 k1 3 NULL 1 Using where; Using index; Using join buffer (flat, BNL join) explain select min(a4 - 0.01) from t1; id select_type table type possible_keys key key_len ref rows Extra @@ -651,7 +651,7 @@ explain select concat(min(t1.a1),min(t2.a4)) from t1, t2 where t2.a4 <> 'AME'; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 index k2 k2 4 NULL 7 Using where; Using index -1 SIMPLE t1 index NULL PRIMARY 3 NULL 15 Using index; Using join buffer +1 SIMPLE t1 index NULL PRIMARY 3 NULL 15 Using index; Using join buffer (flat, BNL join) drop table t1, t2; create table t1 (a char(10)); insert into t1 values ('a'),('b'),('c'); diff --git a/mysql-test/suite/pbxt/r/greedy_optimizer.result b/mysql-test/suite/pbxt/r/greedy_optimizer.result index 1d3e42b70fb..2fb65d4d824 100644 --- a/mysql-test/suite/pbxt/r/greedy_optimizer.result +++ b/mysql-test/suite/pbxt/r/greedy_optimizer.result @@ -121,11 +121,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -133,59 +133,59 @@ Last_query_cost 822.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 822.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value @@ -201,11 +201,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -213,59 +213,59 @@ Last_query_cost 822.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 822.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 290.146368 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 290.146368 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value Last_query_cost 290.146368 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value @@ -277,11 +277,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -289,60 +289,60 @@ Last_query_cost 822.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 822.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 @@ -353,11 +353,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -365,59 +365,59 @@ Last_query_cost 822.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 822.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 290.146368 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 290.146368 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value Last_query_cost 290.146368 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.c21 1 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value @@ -433,11 +433,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -445,59 +445,59 @@ Last_query_cost 822.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 822.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value @@ -509,11 +509,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -521,60 +521,60 @@ Last_query_cost 822.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 822.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 @@ -585,11 +585,11 @@ select @@optimizer_search_depth; explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value @@ -597,59 +597,59 @@ Last_query_cost 822.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c12 = t2.c21 and t2.c22 = t3.c31 and t3.c32 = t4.c41 and t4.c42 = t5.c51 and t5.c52 = t6.c61 and t6.c62 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.c22 1 -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t4.c42 1 -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t6.c62 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 822.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using index -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using index -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using index show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t1, t2, t3, t4, t5, t6, t7 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value Last_query_cost 795.625316 explain select t1.c11 from t7, t6, t5, t4, t3, t2, t1 where t1.c11 = t2.c21 and t1.c12 = t3.c31 and t1.c13 = t4.c41 and t1.c14 = t5.c51 and t1.c15 = t6.c61 and t1.c16 = t7.c71 and t2.c22 = t3.c32 and t2.c23 = t4.c42 and t2.c24 = t5.c52 and t2.c25 = t6.c62 and t2.c26 = t7.c72 and t3.c33 = t4.c43 and t3.c34 = t5.c53 and t3.c35 = t6.c63 and t3.c36 = t7.c73 and t4.c42 = t5.c54 and t4.c43 = t6.c64 and t4.c44 = t7.c74 and t5.c52 = t6.c65 and t5.c53 = t7.c75 and t6.c62 = t7.c76; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 -1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer +1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 3 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.c12 1 Using where -1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t5 eq_ref PRIMARY PRIMARY 4 test.t1.c14 1 Using where -1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 18 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t7 eq_ref PRIMARY PRIMARY 4 test.t1.c16 1 Using where show status like 'Last_query_cost'; Variable_name Value diff --git a/mysql-test/suite/pbxt/r/group_by.result b/mysql-test/suite/pbxt/r/group_by.result index c5c9099af0d..c7f87f2dc35 100644 --- a/mysql-test/suite/pbxt/r/group_by.result +++ b/mysql-test/suite/pbxt/r/group_by.result @@ -537,11 +537,11 @@ a b explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort -1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer +1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b ORDER BY NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary -1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer +1 SIMPLE t2 ALL a NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) drop table t1,t2; create table t1 (a int, b int); insert into t1 values (1, 4),(10, 40),(1, 4),(10, 43),(1, 4),(10, 41),(1, 4),(10, 43),(1, 4); @@ -856,7 +856,7 @@ explain SELECT straight_join sql_no_cache v1.a, v1.b, v1.real_b from t2, v1 where t2.b=v1.a GROUP BY t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 index b b 2 NULL 10 Using index +1 SIMPLE t2 index b b 2 NULL 10 Using where; Using index 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 1 test.t2.b 1 SELECT straight_join sql_no_cache v1.a, v1.b, v1.real_b from t2, v1 where t2.b=v1.a GROUP BY t2.b; diff --git a/mysql-test/suite/pbxt/r/group_min_max.result b/mysql-test/suite/pbxt/r/group_min_max.result index 396451cf8a9..e4ba16ce527 100644 --- a/mysql-test/suite/pbxt/r/group_min_max.result +++ b/mysql-test/suite/pbxt/r/group_min_max.result @@ -2268,7 +2268,7 @@ ON t1_outer1.a = (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) AND t1_outer1.b = t1_outer2.b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1_outer1 ref a a 5 const 1 Using where; Using index -1 PRIMARY t1_outer2 index NULL a 10 NULL 15 Using where; Using index; Using join buffer +1 PRIMARY t1_outer2 index NULL a 10 NULL 15 Using where; Using index; Using join buffer (flat, BNL join) 2 SUBQUERY t1 index NULL a 10 NULL 15 Using index EXPLAIN SELECT (SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x FROM t1 AS t1_outer) x2 FROM t1 AS t1_outer2; diff --git a/mysql-test/suite/pbxt/r/join.result b/mysql-test/suite/pbxt/r/join.result index 6b6dba69b32..2e49a7f02bf 100644 --- a/mysql-test/suite/pbxt/r/join.result +++ b/mysql-test/suite/pbxt/r/join.result @@ -794,8 +794,8 @@ Z vv: Following query must use ALL(t1), eq_ref(A), eq_ref(B): vv explain select * from t1, t2 A, t2 B where A.a = t1.a and B.a=A.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 10 -1 SIMPLE A eq_ref PRIMARY PRIMARY 4 test.t1.a 1 +1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where +1 SIMPLE A eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where 1 SIMPLE B eq_ref PRIMARY PRIMARY 4 test.A.b 1 show status like '%cost%'; Variable_name Value diff --git a/mysql-test/suite/pbxt/r/join_nested.result b/mysql-test/suite/pbxt/r/join_nested.result index 2be4247c97f..d6c4b9a7322 100644 --- a/mysql-test/suite/pbxt/r/join_nested.result +++ b/mysql-test/suite/pbxt/r/join_nested.result @@ -229,7 +229,7 @@ t8 ON t7.b=t8.b AND t6.b < 10; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 -1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer +1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join) 1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t8`.`b` = `test`.`t7`.`b`))) where 1 @@ -544,7 +544,7 @@ t0.b=t1.b AND (t2.a >= 4 OR t2.c IS NULL); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where @@ -639,7 +639,7 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where @@ -647,7 +647,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) SELECT t9.a,t9.b @@ -836,7 +836,7 @@ ON t3.a=1 AND t2.b=t4.b WHERE t1.a <= 2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: @@ -850,11 +850,11 @@ LEFT JOIN ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 -1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer +1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join) 1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 1 100.00 Using where 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Warnings: -Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(((`test`.`t3`.`a` = 1) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`)))) where 1 +Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on((((`test`.`t3`.`a` = 1) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`))) and (`test`.`t3`.`b` is not null))) where 1 SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b FROM (t3,t4) LEFT JOIN @@ -906,7 +906,7 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where @@ -914,7 +914,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t4(b); @@ -956,17 +956,17 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where -1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 +1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 Using where 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t3`.`b` = `test`.`t4`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t3`.`b` = `test`.`t4`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t8(b); EXPLAIN SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, @@ -1005,7 +1005,7 @@ t0.b=t1.b AND (t9.a=1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 @@ -1013,7 +1013,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 1 -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) ATTENTION: the above EXPLAIN has several competing QEPs with identical . costs. To combat the plan change it uses --sorted_result and . and --replace tricks @@ -1064,7 +1064,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 1 -1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using join buffer +1 SIMPLE t9 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) ATTENTION: the above EXPLAIN has several competing QEPs with identical . costs. To combat the plan change it uses --sorted_result . and --replace tricks @@ -1209,7 +1209,7 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL a 5 NULL # Using index -1 SIMPLE t3 index c c 5 NULL # Using index +1 SIMPLE t3 index c c 5 NULL # Using where; Using index 1 SIMPLE t2 ref b b 5 test.t3.c # Using where; Using index SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; a b c @@ -1280,7 +1280,7 @@ DELETE FROM t3; EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index NULL a 5 NULL # Using index -1 SIMPLE t3 index c c 5 NULL # Using index +1 SIMPLE t3 index c c 5 NULL # Using where; Using index 1 SIMPLE t2 ref b b 5 test.t3.c # Using where; Using index SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c; a b c @@ -1453,7 +1453,7 @@ explain select * from t4 join t2 left join (t3 join t5 on t5.a=t3.b) on t3.a=t2.b where t4.a<=>t3.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL X -1 SIMPLE t3 ref a a 5 test.t2.b X +1 SIMPLE t3 ref a a 5 test.t2.b X Using where 1 SIMPLE t5 ref a a 5 test.t3.b X 1 SIMPLE t4 ref a a 5 test.t3.b X Using where explain select * from (t4 join t6 on t6.a=t4.b) right join t3 on t4.a=t3.b @@ -1461,17 +1461,17 @@ join t2 left join (t5 join t7 on t7.a=t5.b) on t5.a=t2.b where t3.a<=>t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL X 1 SIMPLE t3 ref a a 5 test.t2.b X Using where -1 SIMPLE t4 ref a a 5 test.t3.b X +1 SIMPLE t4 ref a a 5 test.t3.b X Using where 1 SIMPLE t6 ref a a 5 test.t4.b X -1 SIMPLE t5 ref a a 5 test.t2.b X +1 SIMPLE t5 ref a a 5 test.t2.b X Using where 1 SIMPLE t7 ref a a 5 test.t5.b X explain select * from t2 left join (t3 left join (t4 join t6 on t6.a=t4.b) on t4.a=t3.b join t5 on t5.a=t3.b) on t3.a=t2.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL X -1 SIMPLE t3 ref a a 5 test.t2.b X -1 SIMPLE t4 ref a a 5 test.t3.b X +1 SIMPLE t3 ref a a 5 test.t2.b X Using where +1 SIMPLE t4 ref a a 5 test.t3.b X Using where 1 SIMPLE t6 ref a a 5 test.t4.b X 1 SIMPLE t5 ref a a 5 test.t3.b X drop table t0, t1, t2, t3, t4, t5, t6, t7; @@ -1486,7 +1486,7 @@ explain select * from t1 left join on (t1.a = t2.a); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 10 -1 SIMPLE t2 ref a a 5 test.t1.a 1 +1 SIMPLE t2 ref a a 5 test.t1.a 1 Using where 1 SIMPLE t3 ref a a 5 test.t1.a 1 Using where drop table t1, t2, t3; CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, type varchar(10)); diff --git a/mysql-test/suite/pbxt/r/join_outer.result b/mysql-test/suite/pbxt/r/join_outer.result index e6ae055d811..adf316f7e6c 100644 --- a/mysql-test/suite/pbxt/r/join_outer.result +++ b/mysql-test/suite/pbxt/r/join_outer.result @@ -1126,7 +1126,7 @@ a b a b 7 8 7 5 EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a OR t1.a = t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 +1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a IN(t2.a, t2.b); id select_type table type possible_keys key key_len ref rows Extra diff --git a/mysql-test/suite/pbxt/r/null_key.result b/mysql-test/suite/pbxt/r/null_key.result index 272120e46a4..dca1dde82e9 100644 --- a/mysql-test/suite/pbxt/r/null_key.result +++ b/mysql-test/suite/pbxt/r/null_key.result @@ -178,12 +178,12 @@ create table t2 (a int); insert into t2 values (7),(8); explain select * from t2 straight_join t1 where t1.a=t2.a and b is null; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t1 ref a,b a 10 test.t2.a,const 2 Using where; Using index drop index b on t1; explain select * from t2,t1 where t1.a=t2.a and b is null; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t1 ref a a 10 test.t2.a,const 2 Using where; Using index select * from t2,t1 where t1.a=t2.a and b is null; a a b @@ -191,7 +191,7 @@ a a b 8 8 NULL explain select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null); id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where 1 SIMPLE t1 ref_or_null a a 10 test.t2.a,const 4 Using index select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null); a a b @@ -407,8 +407,8 @@ EXPLAIN SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 4 -1 SIMPLE t2 ref idx idx 5 test.t1.a 1 -1 SIMPLE t3 ref idx idx 5 test.t2.b 1 Using index +1 SIMPLE t2 ref idx idx 5 test.t1.a 1 Using where +1 SIMPLE t3 ref idx idx 5 test.t2.b 1 Using where; Using index FLUSH STATUS ; SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a LEFT JOIN t3 ON t2.b=t3.b; diff --git a/mysql-test/suite/pbxt/r/range.result b/mysql-test/suite/pbxt/r/range.result index 0dac5704d45..3974bfaa3f2 100644 --- a/mysql-test/suite/pbxt/r/range.result +++ b/mysql-test/suite/pbxt/r/range.result @@ -222,27 +222,27 @@ update t1 set y=x; explain select * from t1, t1 t2 where t1.y = 8 and t2.x between 7 and t1.y+0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer +1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 8 and t2.x >= 7 and t2.x <= t1.y+0; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer +1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x between t1.y-1 and t1.y+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer +1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= t1.y-1 and t2.x <= t1.y+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer +1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x between 0 and t1.y; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer +1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join) explain select * from t1, t1 t2 where t1.y = 2 and t2.x >= 0 and t2.x <= t1.y; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref y y 5 const 1 -1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer +1 SIMPLE t2 range x x 5 NULL 1 Using where; Using join buffer (flat, BNL join) explain select count(*) from t1 where x in (1); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref x x 5 const 1 Using index diff --git a/mysql-test/suite/pbxt/r/select.result b/mysql-test/suite/pbxt/r/select.result index c7601c00ee0..0f0e4d48311 100644 --- a/mysql-test/suite/pbxt/r/select.result +++ b/mysql-test/suite/pbxt/r/select.result @@ -1437,7 +1437,7 @@ companynr companynr explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary -1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008; fld1 companynr fld3 period 038008 37 reporters 1008 @@ -2368,7 +2368,7 @@ insert into t1 values (1,2), (2,2), (3,2), (4,2); insert into t2 values (1,3), (2,3), (3,4), (4,4); explain select * from t1 left join t2 on a=c where d in (4); id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ref c,d d 5 const 1 +1 SIMPLE t2 ref c,d d 5 const 1 Using where 1 SIMPLE t1 ref a a 5 test.t2.c 1 select * from t1 left join t2 on a=c where d in (4); a b c d @@ -2376,7 +2376,7 @@ a b c d 4 2 4 4 explain select * from t1 left join t2 on a=c where d = 4; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t2 ref c,d d 5 const 1 +1 SIMPLE t2 ref c,d d 5 const 1 Using where 1 SIMPLE t1 ref a a 5 test.t2.c 1 select * from t1 left join t2 on a=c where d = 4; a b c d @@ -2723,7 +2723,7 @@ where (t1.c=t2.a or (t1.c=t3.a and t2.a=t3.b)) and t1.b=556476786 and t2.b like '%%' order by t2.b limit 0,1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ref b,c b 5 const 1 Using temporary; Using filesort -1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer +1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1) DROP TABLE t1,t2,t3; CREATE TABLE t1 (a int, INDEX idx(a)); @@ -2746,7 +2746,7 @@ Note 1031 Table storage engine for 't1' doesn't have this option EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 index b b 5 NULL 2 Using index -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; a b a b 1 NULL 1 1 @@ -2756,7 +2756,7 @@ a b a b EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 index b b 5 NULL 2 Using index -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; a b a b 1 NULL 1 1 @@ -2910,11 +2910,11 @@ a EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 -1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 -1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) DROP TABLE t1,t2; select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0; x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0 @@ -3632,7 +3632,7 @@ WHERE t1.id = 8 AND (t2.i=t1.b OR t2.i=t1.e) AND t3.a=t2.a AND t3.c IN ('bb','ee'); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 -1 SIMPLE t2 range si,ai si 5 NULL 2 Using where +1 SIMPLE t2 range si,ai ai 5 NULL 1 Using where 1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where DROP TABLE t1,t2,t3; DROP TABLE IF EXISTS t1; diff --git a/mysql-test/suite/pbxt/r/select_safe.result b/mysql-test/suite/pbxt/r/select_safe.result index 795d07bbc5f..4d078e96cc2 100644 --- a/mysql-test/suite/pbxt/r/select_safe.result +++ b/mysql-test/suite/pbxt/r/select_safe.result @@ -71,12 +71,12 @@ test.t1 analyze status OK insert into t1 values (null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"),(null,"a"); explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL b NULL NULL NULL 21 +1 SIMPLE t1 ALL b NULL NULL NULL 21 Using where 1 SIMPLE t2 ref b b 21 test.t1.b 1 set MAX_SEEKS_FOR_KEY=1; explain select STRAIGHT_JOIN * from t1,t1 as t2 where t1.b=t2.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL b NULL NULL NULL 21 +1 SIMPLE t1 ALL b NULL NULL NULL 21 Using where 1 SIMPLE t2 ref b b 21 test.t1.b 1 SET MAX_SEEKS_FOR_KEY=DEFAULT; drop table t1, t2; diff --git a/mysql-test/suite/pbxt/r/subselect.result b/mysql-test/suite/pbxt/r/subselect.result index cfd459b4291..8603e653577 100644 --- a/mysql-test/suite/pbxt/r/subselect.result +++ b/mysql-test/suite/pbxt/r/subselect.result @@ -906,7 +906,7 @@ explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) F id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index 2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using index -2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer +2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` drop table t1,t2,t3; @@ -1296,7 +1296,7 @@ a explain extended select * from t2 where t2.a in (select a from t1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index -1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer +1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 4 75.00 Using where; Using index; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (`test`.`t1`.`a` = `test`.`t2`.`a`) select * from t2 where t2.a in (select a from t1 where t1.b <> 30); @@ -1306,7 +1306,7 @@ a explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index -1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer +1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); @@ -1316,7 +1316,7 @@ a explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 4 100.00 Using index -1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer +1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 4 75.00 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`b`)) @@ -1334,7 +1334,7 @@ a 4 explain extended select * from t2 where t2.a in (select a from t1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index 1 PRIMARY t1 ref a a 5 test.t2.a 1 100.00 Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where (`test`.`t1`.`a` = `test`.`t2`.`a`) @@ -1344,7 +1344,7 @@ a 4 explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index 1 PRIMARY t1 ref a a 5 test.t2.a 1 100.00 Using where; Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) @@ -1354,8 +1354,8 @@ a 3 explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index -1 PRIMARY t1 ref a a 5 test.t2.a 1 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index +1 PRIMARY t1 ref a a 5 test.t2.a 1 100.00 Using where; Using index 1 PRIMARY t3 ref a a 5 test.t1.b 1 100.00 Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1` join `test`.`t3`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`b`)) @@ -1371,7 +1371,7 @@ a 4 explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t2 index a a 5 NULL 4 100.00 Using index +1 PRIMARY t2 index a a 5 NULL 4 100.00 Using where; Using index 1 PRIMARY t1 ref a a 5 test.t2.a 1 100.00 Using where; Using index; FirstMatch(t2) Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`a` = `test`.`t2`.`a`) and (`test`.`t1`.`b` <> 30)) @@ -3554,7 +3554,7 @@ WHERE t1.t < t2.t AND t1.i2=1 AND t2.i1=t1.i1 ORDER BY t1.t DESC LIMIT 1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 1 -1 PRIMARY t1 index NULL PRIMARY 16 NULL 11 Using where; Using index; Using join buffer +1 PRIMARY t1 index NULL PRIMARY 16 NULL 11 Using where; Using index; Using join buffer (flat, BNL join) 2 DEPENDENT SUBQUERY t1 ref PRIMARY PRIMARY 8 test.t2.i1,const 1 Using where; Using index; Using filesort SELECT * FROM t1,t2 WHERE t1.t = (SELECT t1.t FROM t1 @@ -4222,7 +4222,7 @@ CREATE INDEX I1 ON t1 (a); CREATE INDEX I2 ON t1 (b); EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 index I1 I1 2 NULL 2 Using index; LooseScan +1 PRIMARY t1 index I1 I1 2 NULL 2 Using where; Using index; LooseScan 1 PRIMARY t1 ref I2 I2 13 test.t1.a 1 Using where SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1); a b @@ -4232,7 +4232,7 @@ CREATE INDEX I1 ON t2 (a); CREATE INDEX I2 ON t2 (b); EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t2 index I1 I1 4 NULL 2 Using index; LooseScan +1 PRIMARY t2 index I1 I1 4 NULL 2 Using where; Using index; LooseScan 1 PRIMARY t2 ref I2 I2 13 test.t2.a 1 Using where SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2); a b diff --git a/mysql-test/suite/pbxt/r/union.result b/mysql-test/suite/pbxt/r/union.result index 2d90250157d..50d4df6e241 100644 --- a/mysql-test/suite/pbxt/r/union.result +++ b/mysql-test/suite/pbxt/r/union.result @@ -500,7 +500,7 @@ explain (select * from t1 where a=1 and b=10) union (select straight_join t1.a,t id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 2 UNION t1 index PRIMARY PRIMARY 4 NULL 4 Using index -2 UNION t2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index; Using join buffer +2 UNION t2 index PRIMARY PRIMARY 4 NULL 4 Using where; Using index; Using join buffer (flat, BNL join) NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL explain (select * from t1 where a=1) union (select * from t1 where b=1); id select_type table type possible_keys key key_len ref rows Extra diff --git a/mysql-test/suite/vcol/r/vcol_misc.result b/mysql-test/suite/vcol/r/vcol_misc.result index a460b8da709..91fc6643af4 100644 --- a/mysql-test/suite/vcol/r/vcol_misc.result +++ b/mysql-test/suite/vcol/r/vcol_misc.result @@ -143,8 +143,8 @@ set join_cache_level=6; explain select * from t1,t2 where t1.b=t2.c and d <= 100; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ref idx idx 5 test.t1.b 2 Using where; Using join buffer +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where +1 SIMPLE t2 ref idx idx 5 test.t1.b 2 Using where; Using join buffer (flat, BKA join) select * from t1,t2 where t1.b=t2.c and d <= 100; a b c d v 4 20 20 100 101 diff --git a/mysql-test/suite/vcol/r/vcol_misc.result.moved b/mysql-test/suite/vcol/r/vcol_misc.result.moved deleted file mode 100644 index 57460b1d669..00000000000 --- a/mysql-test/suite/vcol/r/vcol_misc.result.moved +++ /dev/null @@ -1,20 +0,0 @@ -drop table if exists t1,t2; -create table t1 (a int, b int); -insert into t1 values (3, 30), (4, 20), (1, 20); -create table t2 (c int, d int, v int as (d+1), index idx(c)); -insert into t2(c,d) values -(20, 100), (20, 300), (30, 100), (30, 200), (40, 500), -(70, 100), (40, 300), (60, 100), (40, 100), (70, 100); -set join_cache_level=6; -explain -select * from t1,t2 where t1.b=t2.c and d <= 100; -id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t2 ref idx idx 5 test.t1.b 2 Using where; Using join buffer -select * from t1,t2 where t1.b=t2.c and d <= 100; -a b c d v -4 20 20 100 101 -1 20 20 100 101 -3 30 30 100 101 -set join_cache_level=default; -drop table t1, t2; diff --git a/mysql-test/suite/vcol/r/vcol_select_innodb.result b/mysql-test/suite/vcol/r/vcol_select_innodb.result index aa32d91142e..68a9b2a7a63 100644 --- a/mysql-test/suite/vcol/r/vcol_select_innodb.result +++ b/mysql-test/suite/vcol/r/vcol_select_innodb.result @@ -64,7 +64,7 @@ a b c explain select * from t1 where b in (select c from t3); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t3 index c c 5 NULL 3 Using index -1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) # select_type=PRIMARY, type=range,ref select * from t1 where c in (select c from t3 where c between -2 and -1); a b c diff --git a/mysql-test/suite/vcol/r/vcol_select_myisam.result b/mysql-test/suite/vcol/r/vcol_select_myisam.result index e7c01abc3ac..a5d24a32693 100644 --- a/mysql-test/suite/vcol/r/vcol_select_myisam.result +++ b/mysql-test/suite/vcol/r/vcol_select_myisam.result @@ -64,7 +64,7 @@ a b c explain select * from t1 where b in (select c from t3); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t3 index c c 5 NULL 3 Using index -1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer +1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) # select_type=PRIMARY, type=range,ref select * from t1 where c in (select c from t3 where c between -2 and -1); a b c diff --git a/mysql-test/t/join.test b/mysql-test/t/join.test index 43b373c9703..cb865528aa2 100644 --- a/mysql-test/t/join.test +++ b/mysql-test/t/join.test @@ -851,4 +851,23 @@ ENGINE=MERGE UNION=(t1,t2); SELECT t1.a FROM mm1,t1; DROP TABLE t1, t2, mm1; +--echo # +--echo # BUG#47217 Lost optimization caused slowdown & wrong result. +--echo # +CREATE TABLE t1 (pk INT, v VARCHAR(2), PRIMARY KEY(pk)); +CREATE INDEX ix1 ON t1(v); +CREATE TABLE t2 (pk INT, v VARCHAR(2), PRIMARY KEY(pk)); +CREATE INDEX ix2 ON t2(v); +INSERT INTO t1 VALUES (1,'a'),(2,NULL); +INSERT INTO t2 VALUES (1,NULL); +EXPLAIN SELECT * FROM t1 JOIN t2 ON t1.v = t2.v ORDER BY 1; +EXPLAIN SELECT * FROM t1 JOIN t2 ON t1.v = t2.v; +INSERT INTO t1 VALUES (3,'b'),(4,NULL),(5,'c'),(6,'cc'),(7,'d'), + (8,'dd'),(9,'e'),(10,'ee'); +INSERT INTO t2 VALUES (2,NULL); +FLUSH STATUS; +SELECT * FROM t1 JOIN t2 ON t1.v = t2.v WHERE t2.v IS NULL ORDER BY 1; +SHOW STATUS LIKE 'Handler_read_%'; +DROP TABLE t1, t2; + --echo End of 5.1 tests diff --git a/mysql-test/t/join_cache.test b/mysql-test/t/join_cache.test index 0cb1c139161..010abed3c2b 100644 --- a/mysql-test/t/join_cache.test +++ b/mysql-test/t/join_cache.test @@ -3,6 +3,10 @@ DROP TABLE IF EXISTS t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11; DROP DATABASE IF EXISTS world; --enable_warnings +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; + set names utf8; CREATE DATABASE world; @@ -160,7 +164,7 @@ use world; --enable_query_log show variables like 'join_buffer_size'; -set join_cache_level=5; +set join_cache_level=3; show variables like 'join_cache_level'; EXPLAIN @@ -187,14 +191,55 @@ SELECT City.Name, Country.Name, CountryLanguage.Language City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; ---echo # !!!NB igor: after backporting the SJ code the following should return ---echo # EXPLAIN ---echo # SELECT Name FROM City ---echo # WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND ---echo # City.Population > 100000; ---echo # id select_type table type possible_keys key key_len ref rows Extra ---echo # 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR ---echo # 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +EXPLAIN +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +EXPLAIN +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +show variables like 'join_buffer_size'; +set join_cache_level=4; +show variables like 'join_cache_level'; + +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; EXPLAIN SELECT Name FROM City @@ -218,7 +263,9 @@ SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.P WHERE Country.Population > 10000000; -set join_cache_level=6; + +show variables like 'join_buffer_size'; +set join_cache_level=5; show variables like 'join_cache_level'; EXPLAIN @@ -245,14 +292,54 @@ SELECT City.Name, Country.Name, CountryLanguage.Language City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; ---echo # !!!NB igor: after backporting the SJ code the following should return ---echo # EXPLAIN ---echo # SELECT Name FROM City ---echo # WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND ---echo # City.Population > 100000; ---echo # id select_type table type possible_keys key key_len ref rows Extra ---echo # 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR ---echo # 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +EXPLAIN +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +EXPLAIN +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.Percentage) + FROM Country LEFT JOIN CountryLanguage ON + (CountryLanguage.Country=Country.Code AND Language='English') + WHERE + Country.Population > 10000000; + +set join_cache_level=6; +show variables like 'join_cache_level'; + +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; EXPLAIN SELECT Name FROM City @@ -303,15 +390,6 @@ SELECT City.Name, Country.Name, CountryLanguage.Language City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; ---echo # !!!NB igor: after backporting the SJ code the following should return ---echo # EXPLAIN ---echo # SELECT Name FROM City ---echo # WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND ---echo # City.Population > 100000; ---echo # id select_type table type possible_keys key key_len ref rows Extra ---echo # 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR ---echo # 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer - EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND @@ -361,15 +439,6 @@ SELECT City.Name, Country.Name, CountryLanguage.Language City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; ---echo # !!!NB igor: after backporting the SJ code the following should return ---echo # EXPLAIN ---echo # SELECT Name FROM City ---echo # WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND ---echo # City.Population > 100000; ---echo # id select_type table type possible_keys key key_len ref rows Extra ---echo # 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR ---echo # 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer - EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND @@ -395,7 +464,7 @@ SELECT Country.Name, IF(ISNULL(CountryLanguage.Country), NULL, CountryLanguage.P set join_buffer_size=256; show variables like 'join_buffer_size'; -set join_cache_level=5; +set join_cache_level=3; show variables like 'join_cache_level'; EXPLAIN @@ -422,14 +491,41 @@ SELECT City.Name, Country.Name, CountryLanguage.Language City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; ---echo # !!!NB igor: after backporting the SJ code the following should return ---echo # EXPLAIN ---echo # SELECT Name FROM City ---echo # WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND ---echo # City.Population > 100000; ---echo # id select_type table type possible_keys key key_len ref rows Extra ---echo # 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR ---echo # 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +EXPLAIN +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +set join_cache_level=4; +show variables like 'join_cache_level'; + +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; EXPLAIN SELECT Name FROM City @@ -440,7 +536,7 @@ SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND City.Population > 100000; -set join_cache_level=6; +set join_cache_level=5; show variables like 'join_cache_level'; EXPLAIN @@ -467,14 +563,41 @@ SELECT City.Name, Country.Name, CountryLanguage.Language City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; ---echo # !!!NB igor: after backporting the SJ code the following should return ---echo # EXPLAIN ---echo # SELECT Name FROM City ---echo # WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND ---echo # City.Population > 100000; ---echo # id select_type table type possible_keys key key_len ref rows Extra ---echo # 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR ---echo # 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer +EXPLAIN +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +SELECT Name FROM City + WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND + City.Population > 100000; + +set join_cache_level=6; +show variables like 'join_cache_level'; + +EXPLAIN +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +SELECT City.Name, Country.Name FROM City,Country + WHERE City.Country=Country.Code AND + Country.Name LIKE 'L%' AND City.Population > 100000; + +EXPLAIN +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; + +SELECT City.Name, Country.Name, CountryLanguage.Language + FROM City,Country,CountryLanguage + WHERE City.Country=Country.Code AND + CountryLanguage.Country=Country.Code AND + City.Name LIKE 'L%' AND Country.Population > 3000000 AND + CountryLanguage.Percentage > 50; EXPLAIN SELECT Name FROM City @@ -512,15 +635,6 @@ SELECT City.Name, Country.Name, CountryLanguage.Language City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; ---echo # !!!NB igor: after backporting the SJ code the following should return ---echo # EXPLAIN ---echo # SELECT Name FROM City ---echo # WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND ---echo # City.Population > 100000; ---echo # id select_type table type possible_keys key key_len ref rows Extra ---echo # 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR ---echo # 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer - EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND @@ -557,15 +671,6 @@ SELECT City.Name, Country.Name, CountryLanguage.Language City.Name LIKE 'L%' AND Country.Population > 3000000 AND CountryLanguage.Percentage > 50; ---echo # !!!NB igor: after backporting the SJ code the following should return ---echo # EXPLAIN ---echo # SELECT Name FROM City ---echo # WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND ---echo # City.Population > 100000; ---echo # id select_type table type possible_keys key key_len ref rows Extra ---echo # 1 PRIMARY Country range PRIMARY,Name Name 52 NULL 10 Using index condition; Using MRR ---echo # 1 PRIMARY City ref Population,Country Country 3 world.Country.Code 18 Using where; Using join buffer - EXPLAIN SELECT Name FROM City WHERE City.Country IN (SELECT Code FROM Country WHERE Country.Name LIKE 'L%') AND @@ -587,13 +692,14 @@ SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND City.Population > 3000000; set join_cache_level=8; -set join_buffer_size=256; +set join_buffer_size=384; --replace_column 9 # EXPLAIN SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND City.Population > 3000000; +--sorted_result SELECT City.Name, Country.Name FROM City,Country WHERE City.Country=Country.Code AND City.Population > 3000000; @@ -997,7 +1103,7 @@ select * from t1 left join t2 on (1=0); explain select * from t1 left join t2 on (1=0) where a=40; select * from t1 left join t2 on (1=0) where a=40; -set join_cache_level=1; +set join_cache_level=0; explain select * from t1 left join t2 on (1=0); set join_cache_level=default; @@ -1131,6 +1237,8 @@ INSERT INTO t3(a,b) VALUES (5,30), (5,40), (5,50), (5,60), (5,70), (5,80), (7,30), (7,40), (7,50), (7,60), (7,70), (7,80); +set join_cache_level=0; + SELECT t1.a, t2.a, t3.a, t2.b, t3.b, t3.val FROM (t1,t2) LEFT JOIN t3 ON (t1.a=t3.a AND t2.b=t3.b) WHERE t1.a=t2.a; @@ -1148,7 +1256,7 @@ SELECT t1.a, t2.a, t3.a, t2.b, t3.b, t3.val WHERE t1.a=t2.a; DROP INDEX idx ON t3; -set join_cache_level=4; +set join_cache_level=2; EXPLAIN SELECT t1.a, t2.a, t3.a, t2.b, t3.b, t3.val @@ -1847,3 +1955,293 @@ select t1.* from t1,t2,t3; set join_cache_level=default; drop table t1,t2,t3; + +--echo # +--echo # Bug #52394: using join buffer for 3 table join with ref access +--echo # LP #623209: and no references to the columns of the middle table +--echo # + + +set join_cache_level=6; + +CREATE TABLE t1 (a int(11), b varchar(1)); +INSERT INTO t1 VALUES (6,'r'),(27,'o'); + +CREATE TABLE t2(a int); +INSERT INTO t2 VALUES(1),(2),(3),(4),(5); + +CREATE TABLE t3 (a int(11) primary key, b varchar(1)); +INSERT INTO t3 VALUES +(14,'d'),(15,'z'),(16,'e'),(17,'h'),(18,'b'),(19,'s'),(20,'e'), +(21,'j'),(22,'e'),(23,'f'),(24,'v'),(25,'x'),(26,'m'),(27,'o'); + +EXPLAIN +SELECT t3.a FROM t1,t2,t3 WHERE t1.a = t3.a AND t1.b = t3.b; +SELECT t3.a FROM t1,t2,t3 WHERE t1.a = t3.a AND t1.b = t3.b; + +DROP TABLE t1,t2,t3; + +set join_cache_level=default; + +--echo # +--echo # Bug #51084: Batched key access crashes for SELECT with +--echo # derived table and LEFT JOIN +--echo # + +CREATE TABLE t1 ( + carrier int, + id int PRIMARY KEY +); +INSERT INTO t1 VALUES (1,11),(1,12),(2,13); + +CREATE TABLE t2 ( + scan_date int, + package_id int +); +INSERT INTO t2 VALUES (2008,21),(2008,22); + +CREATE TABLE t3 ( + carrier int PRIMARY KEY, + id int +); +INSERT INTO t3 VALUES (1,31); + +CREATE TABLE t4 ( + carrier_id int, + INDEX carrier_id(carrier_id) +); +INSERT INTO t4 VALUES (31),(32); + +SET join_cache_level=8; + +SELECT COUNT(*) + FROM (t2 JOIN t1) LEFT JOIN (t3 JOIN t4 ON t3.id = t4.carrier_id) + ON t3.carrier = t1.carrier; + +EXPLAIN +SELECT COUNT(*) + FROM (t2 JOIN t1) LEFT JOIN (t3 JOIN t4 ON t3.id = t4.carrier_id) + ON t3.carrier = t1.carrier; + +SET join_cache_level=default; + +DROP TABLE t1,t2,t3,t4; + +--echo # +--echo # Bug #52636: allowing JOINs on NULL values w/ join_cache_level = 5-8 +--echo # + +CREATE TABLE t1 (b int); +INSERT INTO t1 VALUES (NULL),(3); + +CREATE TABLE t2 (a int, b int, KEY (b)); +INSERT INTO t2 VALUES (100,NULL),(150,200); + +set join_cache_level = 5; +explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +--sorted_result +SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; + +set join_cache_level = 8; +explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +--sorted_result +SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; + +# test crash when no key is worth collecting by BKA for t2's ref +delete from t1; +INSERT INTO t1 VALUES (NULL),(NULL); +set join_cache_level = 5; +explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +--sorted_result +SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; + +DROP TABLE t1,t2; + +# test varchar keys +CREATE TABLE t1 (b varchar(100)); +INSERT INTO t1 VALUES (NULL),("some varchar"); + +CREATE TABLE t2 (a int, b varchar(100), KEY (b)); +INSERT INTO t2 VALUES (100,NULL),(150,"varchar"),(200,NULL),(250,"long long varchar"); + +set join_cache_level = 5; +explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +--sorted_result +SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; + +set join_cache_level = 8; +explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; +--sorted_result +SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b; + +set join_cache_level = default; +DROP TABLE t1,t2; + +--echo # +--echo # Bug #54359: Extra rows with join_cache_level=7,8 and two joins +--echo # and multi-column index" +--echo # + +CREATE TABLE t1 ( + pk int NOT NULL, + a int DEFAULT NULL, + b varchar(16) DEFAULT NULL, + c varchar(16) DEFAULT NULL, + INDEX idx (b,a)) +; + +INSERT INTO t1 VALUES (4,9,'k','k'); +INSERT INTO t1 VALUES (12,5,'k','k'); + +set join_cache_level = 8; + +EXPLAIN +SELECT t.a FROM t1 t, t1 s FORCE INDEX(idx) + WHERE s.pk AND s.a >= t.pk AND s.b = t.c; + +SELECT t.a FROM t1 t, t1 s FORCE INDEX(idx) + WHERE s.pk AND s.a >= t.pk AND s.b = t.c; + +set join_cache_level = default; +DROP TABLE t1; + +--echo # +--echo # Bug #54235: Extra rows with join_cache_level=6,8 and two LEFT JOINs +--echo # + +CREATE TABLE t1 (a int); +CREATE TABLE t2 (a int); +CREATE TABLE t3 (a int); +CREATE TABLE t4 (a int); + +INSERT INTO t1 VALUES (null), (2), (null), (1); + +set join_cache_level = 6; +EXPLAIN +SELECT t1.a + FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t2.a) ON 0 + WHERE t1.a OR t3.a; +SELECT t1.a + FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t2.a) ON 0 + WHERE t1.a OR t3.a; + +EXPLAIN +SELECT t1.a + FROM t1 LEFT JOIN (t2 LEFT JOIN (t3 LEFT JOIN t4 ON 1) ON t2.a) ON 0 + WHERE t1.a OR t4.a; +SELECT t1.a + FROM t1 LEFT JOIN (t2 LEFT JOIN (t3 LEFT JOIN t4 ON 1) ON t2.a) ON 0 + WHERE t1.a OR t4.a; + +set join_cache_level = default; +DROP TABLE t1,t2,t3,t4; + +--echo # +--echo # Bug #663840: Memory overwrite causing crash with hash join +--echo # + +SET SESSION join_cache_level=3; +SET SESSION join_buffer_size=100; + +CREATE TABLE t3 ( + i int NOT NULL, + j int NOT NULL, + d date NOT NULL, + t time NOT NULL, + v varchar(1) NOT NULL, + u varchar(1) NOT NULL, + INDEX idx (v) +) COLLATE=latin1_bin; + +INSERT INTO t3 VALUES + (3,8,'2008-12-04','00:00:00','v','v'), (3,8,'2009-03-28','00:00:00','f','f'), + (3,5,'1900-01-01','00:55:47','v','v'), (2,8,'2009-10-02','00:00:00','s','s'), + (1,8,'1900-01-01','20:51:59','a','a'), (0,6,'2008-06-04','09:47:27','p','p'), + (8,7,'2009-01-13','21:58:29','z','z'), (5,2,'1900-01-01','22:45:53','a','a'), + (9,5,'2008-01-28','14:06:48','h','h'), (5,7,'2004-09-18','22:17:16','h','h'), + (4,2,'2006-10-14','14:59:37','v','v'), (2,9,'1900-01-01','23:37:40','v','v'), + (33,142,'2000-11-28','14:14:01','b','b'), (5,3,'2008-04-04','02:54:19','y','y'), + (1,0,'2002-07-13','06:34:26','v','v'), (9,3,'2003-01-03','18:07:38','m','m'), + (1,5,'2006-04-02','13:55:23','z','z'), (3,9,'2006-10-19','20:32:28','n','n'), + (8,1,'2005-06-08','11:57:44','d','d'), (231,107,'2006-12-26','03:10:35','a','a'); + +CREATE TABLE t1 SELECT * FROM t3; +DELETE FROM t1 WHERE i > 8; +CREATE TABLE t2 SELECT * FROM t3; +DELETE FROM t2 WHERE j > 10; + +EXPLAIN +SELECT t1.i, t1.d, t1.v, t2.i, t2.d, t2.t, t2.v FROM t1,t2,t3 + WHERE t3.u <='a' AND t2.j < 5 AND t3.v = t2.u; + +--sorted_result +SELECT t1.i, t1.d, t1.v, t2.i, t2.d, t2.t, t2.v FROM t1,t2,t3 + WHERE t3.u <='a' AND t2.j < 5 AND t3.v = t2.u; + +DROP TABLE t1,t2,t3; + +SET SESSION join_cache_level=DEFAULT; +SET SESSION join_buffer_size=DEFAULT; + + +--echo # +--echo # Bug #664508: 'Simple' GROUP BY + ORDER BY +--echo # when join buffers are used +--echo # + +CREATE TABLE t1 ( + pk int NOT NULL, i int NOT NULL, v varchar(1) NOT NULL, + PRIMARY KEY (pk), INDEX idx1(i), INDEX idx2 (v,i) +); +INSERT INTO t1 VALUES + (10,8,'v'), (11,8,'f'), (12,5,'v'), (13,8,'s'), (14,8,'a'), + (15,6,'p'), (16,7,'z'), (17,2,'a'), (18,5,'h'), (19,7,'h'), + (25,3,'m'), (26,5,'z'), (27,9,'n'), (28,1,'d'), (29,107,'a'); + +CREATE TABLE t2 ( + pk int NOT NULL, i int NOT NULL, v varchar(1) NOT NULL, + PRIMARY KEY (pk), INDEX idx1(i), INDEX idx2(v,i) +); +INSERT INTO t2 VALUES + (10,8,'v'), (11,8,'f'), (12,5,'v'), (13,8,'s'), (14,8,'a'), + (15,6,'p'), (16,7,'z'), (17,2,'a'), (18,5,'h'), (19,7,'h'), + (20,2,'v'), (21,9,'v'), (22,142,'b'), (23,3,'y'), (24,0,'v'), + (25,3,'m'), (26,5,'z'), (27,9,'n'), (28,1,'d'), (29,107,'a'); + +CREATE TABLE t3 ( + pk int NOT NULL, i int(11) NOT NULL, v varchar(1) NOT NULL, + PRIMARY KEY (pk), INDEX idx1(i), INDEX idx2(v,i) +); +INSERT INTO t3 VALUES + (1,9,'x'), (2,5,'g'), (3,1,'o'), (4,0,'g'), (5,1,'v'), + (6,190,'m'), (7,6,'x'), (8,3,'c'), (9,4,'z'), (10,3,'i'), + (11,186,'x'), (12,1,'g'), (13,8,'q'), (14,226,'m'), (15,133,'p'), + (16,6,'e'), (17,3,'t'), (18,8,'j'), (19,5,'h'), (20,7,'w'); + +SET SESSION join_cache_level=1; +EXPLAIN +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v + GROUP BY t2.v ORDER BY t1.pk,t2.v; +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v + GROUP BY t2.v ORDER BY t1.pk,t2.v; + +SET SESSION join_cache_level=6; +EXPLAIN +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v + GROUP BY t2.v ORDER BY t1.pk,t2.v; +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v + GROUP BY t2.v ORDER BY t1.pk,t2.v; + +SET SESSION join_cache_level=4; +EXPLAIN +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v + GROUP BY t2.v ORDER BY t1.pk,t2.v; +SELECT t2.v FROM t1, t2, t3 WHERE t3.v <> t2.v AND t3.pk = t2.i AND t1.v = t3.v + GROUP BY t2.v ORDER BY t1.pk,t2.v; + +DROP TABLE t1,t2,t3; + +SET SESSION join_cache_level=DEFAULT; + +# this must be the last command in the file +set @@optimizer_switch=@save_optimizer_switch; diff --git a/mysql-test/t/join_nested.test b/mysql-test/t/join_nested.test index 166aab99ccd..b4073b751a0 100644 --- a/mysql-test/t/join_nested.test +++ b/mysql-test/t/join_nested.test @@ -1196,9 +1196,6 @@ SELECT COUNT(*) DROP TABLE t1,t2,t3,t4,t5; -# !!!Remove the following if brackets after having merged the code of MWL#128 -if (`SELECT @@join_cache_level=1`) -{ # # BUG#49322: Nested left joins + not-exist optimization # @@ -1238,7 +1235,7 @@ SELECT t1.pk, t1.a, t2.pk, t2.a,t3.pk, t3.a WHERE t3.pk IS NULL; DROP TABLE t1, t2, t3; -} + --echo End of 5.0 tests diff --git a/mysql-test/t/join_nested_jcl6.test b/mysql-test/t/join_nested_jcl6.test index caa656ecd87..5737cfe115f 100644 --- a/mysql-test/t/join_nested_jcl6.test +++ b/mysql-test/t/join_nested_jcl6.test @@ -2,6 +2,10 @@ # Run join_nested.test with BKA enabled # +set @save_optimizer_switch_jcl6=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; + set join_cache_level=6; show variables like 'join_cache_level'; @@ -93,3 +97,5 @@ DROP TABLE t5,t6,t7,t8; set join_cache_level=default; show variables like 'join_cache_level'; + +set @@optimizer_switch=@save_optimizer_switch_jcl6; diff --git a/mysql-test/t/join_outer.test b/mysql-test/t/join_outer.test index b14d9a40300..aed1450e607 100644 --- a/mysql-test/t/join_outer.test +++ b/mysql-test/t/join_outer.test @@ -1030,4 +1030,48 @@ select t2.pk, drop table t1,t2,t3,t4; +--echo # +--echo # Bug#57024: Poor performance when conjunctive condition over the outer +--echo # table is used in the on condition of an outer join +--echo # + +create table t1 (a int); +insert into t1 values (NULL), (NULL), (NULL), (NULL); +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 select * from t1; +insert into t1 values (4), (2), (1), (3); + +create table t2 like t1; +insert into t2 select if(t1.a is null, 10, t1.a) from t1; + +create table t3 (a int, b int, index idx(a)); +insert into t3 values (1, 100), (3, 301), (4, 402), (1, 102), (1, 101); + +analyze table t1,t2,t3; + +flush status; +select sum(t3.b) from t1 left join t3 on t3.a=t1.a and t1.a is not null; +show status like "handler_read%"; +flush status; +select sum(t3.b) from t2 left join t3 on t3.a=t2.a and t2.a <> 10; +show status like "handler_read%"; + +drop table t1,t2,t3; + --echo End of 5.1 tests diff --git a/mysql-test/t/join_outer_jcl6.test b/mysql-test/t/join_outer_jcl6.test index 16543296f27..be98e7503ad 100644 --- a/mysql-test/t/join_outer_jcl6.test +++ b/mysql-test/t/join_outer_jcl6.test @@ -2,6 +2,10 @@ # Run join_outer.test with BKA enabled # +set @save_optimizer_switch_jcl6=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; + set join_cache_level=6; show variables like 'join_cache_level'; @@ -9,3 +13,5 @@ show variables like 'join_cache_level'; set join_cache_level=default; show variables like 'join_cache_level'; + +set @@optimizer_switch=@save_optimizer_switch_jcl6; diff --git a/mysql-test/t/select_jcl6.test b/mysql-test/t/select_jcl6.test index 3247ab6e343..9f9a3a40e0f 100644 --- a/mysql-test/t/select_jcl6.test +++ b/mysql-test/t/select_jcl6.test @@ -2,6 +2,10 @@ # Run select.test with BKA enabled # +set @save_optimizer_switch_jcl6=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; + set join_cache_level=6; show variables like 'join_cache_level'; @@ -9,3 +13,5 @@ show variables like 'join_cache_level'; set join_cache_level=default; show variables like 'join_cache_level'; + +set @@optimizer_switch=@save_optimizer_switch_jcl6; diff --git a/mysql-test/t/subselect3.test b/mysql-test/t/subselect3.test index a621c4c776c..2a5aa1c5429 100644 --- a/mysql-test/t/subselect3.test +++ b/mysql-test/t/subselect3.test @@ -2,6 +2,8 @@ drop table if exists t0, t1, t2, t3, t4, t5, t11, t12, t21, t22; --enable_warnings +set @save_optimizer_switch=@@optimizer_switch; + # # 1. Subquery with GROUP/HAVING # @@ -888,7 +890,7 @@ set @@optimizer_switch='firstmatch=off'; explain select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X; select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X; -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; drop table t1; @@ -906,7 +908,7 @@ select * from t1 where 2 in (select a from t0); set @@optimizer_switch='default,materialization=off'; explain select * from t1 where 2 in (select a from t0); select * from t1 where 2 in (select a from t0); -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; # @@ -952,7 +954,7 @@ flush status; select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E); show status like 'Created_tmp_disk_tables'; set @save_max_heap_table_size=@@max_heap_table_size; -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; drop table t0, t1; # @@ -990,7 +992,7 @@ create table t1 (a decimal); insert into t1 values (1),(2); explain select * from t1 where a in (select a from t1); drop table t1; -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; # # SJ-Materialization-scan for non-first table @@ -1051,7 +1053,7 @@ set @save_optimizer_search_depth=@@optimizer_search_depth; set @@optimizer_search_depth=63; explain select * from t1 where (a,b) in (select a,b from t2); set @@optimizer_search_depth=@save_optimizer_search_depth; -set @@optimizer_switch=default; +set @@optimizer_switch=@save_optimizer_switch; drop table t0, t1, t2; @@ -1181,3 +1183,6 @@ ALTER TABLE t2 CHANGE COLUMN f1 my_column INT; CALL p1; DROP PROCEDURE p1; DROP TABLE t1, t2; + +# The following command must be the last one the file +set @@optimizer_switch=@save_optimizer_switch; diff --git a/mysql-test/t/subselect3_jcl6.test b/mysql-test/t/subselect3_jcl6.test index 9ee23288d99..6d9611f83f3 100644 --- a/mysql-test/t/subselect3_jcl6.test +++ b/mysql-test/t/subselect3_jcl6.test @@ -2,6 +2,10 @@ # Run subselect3.test with BKA enabled # +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; + set join_cache_level=6; show variables like 'join_cache_level'; @@ -9,3 +13,5 @@ show variables like 'join_cache_level'; set join_cache_level=default; show variables like 'join_cache_level'; + +set @@optimizer_switch=@save_optimizer_switch; diff --git a/mysql-test/t/subselect_sj.test b/mysql-test/t/subselect_sj.test index 33f3e936482..783429ed836 100644 --- a/mysql-test/t/subselect_sj.test +++ b/mysql-test/t/subselect_sj.test @@ -5,6 +5,8 @@ drop table if exists t0, t1, t2, t3, t4, t10, t11, t12; --enable_warnings +set @save_optimizer_switch=@@optimizer_switch; + # # 1. Subqueries that are converted into semi-joins # @@ -224,7 +226,8 @@ INSERT INTO WORKS VALUES ('E4','P2',20); INSERT INTO WORKS VALUES ('E4','P4',40); INSERT INTO WORKS VALUES ('E4','P5',80); -set optimizer_switch='default,materialization=off'; +set optimizer_switch=@save_optimizer_switch; +set optimizer_switch='materialization=off'; explain SELECT EMPNUM, EMPNAME FROM STAFF @@ -240,7 +243,7 @@ WHERE EMPNUM IN WHERE PNUM IN (SELECT PNUM FROM PROJ)); -set optimizer_switch='default'; +set optimizer_switch=@save_optimizer_switch; drop table STAFF,WORKS,PROJ; @@ -359,7 +362,7 @@ drop table t1, t2; drop view v1; drop procedure p1; -set SESSION optimizer_switch='default'; +set SESSION optimizer_switch=@save_optimizer_switch; --echo # End of bug#46744 @@ -526,7 +529,7 @@ DROP TABLE t1,t2; DROP VIEW v1,v2; DROP PROCEDURE p1; -set SESSION optimizer_switch='default'; +set SESSION optimizer_switch=@save_optimizer_switch; --echo # End of BUG#48834 @@ -935,3 +938,6 @@ DROP TABLE t2; DROP TABLE t3; --echo # End of Bug#48623 + +# The following command must be the last one the file +set @@optimizer_switch=@save_optimizer_switch; diff --git a/mysql-test/t/subselect_sj2_jcl6.test b/mysql-test/t/subselect_sj2_jcl6.test index 202ea139e5f..5292a56f266 100644 --- a/mysql-test/t/subselect_sj2_jcl6.test +++ b/mysql-test/t/subselect_sj2_jcl6.test @@ -2,6 +2,10 @@ # Run subselect_sj2.test with BKA enabled # +set @save_optimizer_switch_jcl6=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; + set join_cache_level=6; show variables like 'join_cache_level'; @@ -9,3 +13,6 @@ show variables like 'join_cache_level'; set join_cache_level=default; show variables like 'join_cache_level'; + +set @@optimizer_switch=@save_optimizer_switch_jcl6; + diff --git a/mysql-test/t/subselect_sj_jcl6.test b/mysql-test/t/subselect_sj_jcl6.test index f821e1864be..27c864fc699 100644 --- a/mysql-test/t/subselect_sj_jcl6.test +++ b/mysql-test/t/subselect_sj_jcl6.test @@ -2,6 +2,10 @@ # Run subselect_sj.test with BKA enabled # +set @save_optimizer_switch_jcl6=@@optimizer_switch; +set @@optimizer_switch='semijoin_with_cache=on'; +set @@optimizer_switch='outer_join_with_cache=on'; + set join_cache_level=6; show variables like 'join_cache_level'; @@ -37,3 +41,5 @@ drop table t0, t1, t2; set join_cache_level=default; show variables like 'join_cache_level'; + +set @@optimizer_switch=@save_optimizer_switch_jcl6; diff --git a/mysql-test/t/windows.test b/mysql-test/t/windows.test index b7d31948d23..b7d31948d23 100755..100644 --- a/mysql-test/t/windows.test +++ b/mysql-test/t/windows.test diff --git a/sql/event_scheduler.cc b/sql/event_scheduler.cc index 8446fe75c8f..8446fe75c8f 100755..100644 --- a/sql/event_scheduler.cc +++ b/sql/event_scheduler.cc diff --git a/sql/handler.h b/sql/handler.h index 6eb496a38cc..34110145751 100644 --- a/sql/handler.h +++ b/sql/handler.h @@ -1214,6 +1214,8 @@ typedef struct st_range_seq_if bool (*skip_index_tuple) (range_seq_t seq, char *range_info); } RANGE_SEQ_IF; +typedef bool (*SKIP_INDEX_TUPLE_FUNC) (range_seq_t seq, char *range_info); + class COST_VECT { public: diff --git a/sql/multi_range_read.cc b/sql/multi_range_read.cc index efb7ceff05f..0ed1dd4dc75 100644 --- a/sql/multi_range_read.cc +++ b/sql/multi_range_read.cc @@ -223,7 +223,7 @@ handler::multi_range_read_init(RANGE_SEQ_IF *seq_funcs, void *seq_init_param, int handler::multi_range_read_next(char **range_info) { - int UNINIT_VAR(result); + int result= HA_ERR_END_OF_FILE; int range_res; DBUG_ENTER("handler::multi_range_read_next"); diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h index 84c07dbf2b3..b850f9c5adc 100644 --- a/sql/mysql_priv.h +++ b/sql/mysql_priv.h @@ -571,12 +571,17 @@ protected: #define OPTIMIZER_SWITCH_PARTIAL_MATCH_ROWID_MERGE 512 #define OPTIMIZER_SWITCH_PARTIAL_MATCH_TABLE_SCAN 1024 #define OPTIMIZER_SWITCH_SUBQUERY_CACHE (1<<11) +#define OPTIMIZER_SWITCH_OUTER_JOIN_WITH_CACHE (1<<12) +#define OPTIMIZER_SWITCH_SEMIJOIN_WITH_CACHE (1<<13) +#define OPTIMIZER_SWITCH_JOIN_CACHE_INCREMENTAL (1<<14) +#define OPTIMIZER_SWITCH_JOIN_CACHE_HASHED (1<<15) +#define OPTIMIZER_SWITCH_JOIN_CACHE_BKA (1<<16) #ifdef DBUG_OFF -# define OPTIMIZER_SWITCH_LAST (1<<12) +# define OPTIMIZER_SWITCH_LAST (1<<17) #else -# define OPTIMIZER_SWITCH_TABLE_ELIMINATION (1<<12) -# define OPTIMIZER_SWITCH_LAST (1<<13) +# define OPTIMIZER_SWITCH_TABLE_ELIMINATION (1<<17) +# define OPTIMIZER_SWITCH_LAST (1<<18) #endif #ifdef DBUG_OFF @@ -592,7 +597,10 @@ protected: OPTIMIZER_SWITCH_SEMIJOIN | \ OPTIMIZER_SWITCH_PARTIAL_MATCH_ROWID_MERGE|\ OPTIMIZER_SWITCH_PARTIAL_MATCH_TABLE_SCAN|\ - OPTIMIZER_SWITCH_SUBQUERY_CACHE) + OPTIMIZER_SWITCH_SUBQUERY_CACHE | \ + OPTIMIZER_SWITCH_JOIN_CACHE_INCREMENTAL | \ + OPTIMIZER_SWITCH_JOIN_CACHE_HASHED | \ + OPTIMIZER_SWITCH_JOIN_CACHE_BKA) #else # define OPTIMIZER_SWITCH_DEFAULT (OPTIMIZER_SWITCH_INDEX_MERGE | \ OPTIMIZER_SWITCH_INDEX_MERGE_UNION | \ @@ -606,7 +614,10 @@ protected: OPTIMIZER_SWITCH_SEMIJOIN | \ OPTIMIZER_SWITCH_PARTIAL_MATCH_ROWID_MERGE|\ OPTIMIZER_SWITCH_PARTIAL_MATCH_TABLE_SCAN|\ - OPTIMIZER_SWITCH_SUBQUERY_CACHE) + OPTIMIZER_SWITCH_SUBQUERY_CACHE | \ + OPTIMIZER_SWITCH_JOIN_CACHE_INCREMENTAL | \ + OPTIMIZER_SWITCH_JOIN_CACHE_HASHED | \ + OPTIMIZER_SWITCH_JOIN_CACHE_BKA) #endif /* diff --git a/sql/mysqld.cc b/sql/mysqld.cc index 538467fd796..0cf5d1b7e06 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -342,6 +342,11 @@ static const char *optimizer_switch_names[]= "partial_match_rowid_merge", "partial_match_table_scan", "subquery_cache", + "outer_join_with_cache", + "semijoin_with_cache", + "join_cache_incremental", + "join_cache_hashed", + "join_cache_bka", #ifndef DBUG_OFF "table_elimination", #endif @@ -363,6 +368,11 @@ static const unsigned int optimizer_switch_names_len[]= sizeof("partial_match_rowid_merge") - 1, sizeof("partial_match_table_scan") - 1, sizeof("subquery_cache") - 1, + sizeof("outer_join_with_cache") - 1, + sizeof("semijoin_with_cache") - 1, + sizeof("join_cache_incremental") - 1, + sizeof("join_cache_hashed") - 1, + sizeof("join_cache_bka") - 1, #ifndef DBUG_OFF sizeof("table_elimination") - 1, #endif @@ -461,7 +471,10 @@ static const char *optimizer_switch_str="index_merge=on,index_merge_union=on," "semijoin=on," "partial_match_rowid_merge=on," "partial_match_table_scan=on," - "subquery_cache=on" + "subquery_cache=on," + "join_cache_incremental=on," + "join_cache_hashed=on," + "join_cache_bka=on" #ifndef DBUG_OFF ",table_elimination=on"; #else @@ -5936,7 +5949,8 @@ enum options_mysqld OPT_DELAYED_INSERT_LIMIT, OPT_DELAYED_QUEUE_SIZE, OPT_FLUSH_TIME, OPT_FT_MIN_WORD_LEN, OPT_FT_BOOLEAN_SYNTAX, OPT_FT_MAX_WORD_LEN, OPT_FT_QUERY_EXPANSION_LIMIT, OPT_FT_STOPWORD_FILE, - OPT_INTERACTIVE_TIMEOUT, OPT_JOIN_BUFF_SIZE, OPT_JOIN_CACHE_LEVEL, + OPT_INTERACTIVE_TIMEOUT, OPT_JOIN_BUFF_SIZE, + OPT_JOIN_BUFF_SPACE_LIMIT, OPT_JOIN_CACHE_LEVEL, OPT_KEY_BUFFER_SIZE, OPT_KEY_CACHE_BLOCK_SIZE, OPT_KEY_CACHE_DIVISION_LIMIT, OPT_KEY_CACHE_AGE_THRESHOLD, OPT_KEY_CACHE_PARTITIONS, @@ -7080,11 +7094,17 @@ thread is in the relay logs.", &max_system_variables.net_interactive_timeout, 0, GET_ULONG, REQUIRED_ARG, NET_WAIT_TIMEOUT, 1, LONG_TIMEOUT, 0, 1, 0}, {"join_buffer_size", OPT_JOIN_BUFF_SIZE, - "The size of the buffer that is used for full joins.", - &global_system_variables.join_buff_size, - &max_system_variables.join_buff_size, 0, GET_ULONG, + "The size of the buffer that is used for joins.", + &global_system_variables.join_buff_size, + &max_system_variables.join_buff_size, 0, GET_ULONG, REQUIRED_ARG, 128*1024L, 128+MALLOC_OVERHEAD, (longlong) ULONG_MAX, MALLOC_OVERHEAD, 128, 0}, + {"join_buffer_space_limit", OPT_JOIN_BUFF_SPACE_LIMIT, + "The limit of the space for all join buffers used by a query.", + &global_system_variables.join_buff_space_limit, + &max_system_variables.join_buff_space_limit, 0, GET_ULL, + REQUIRED_ARG, 8*128*1024L, 2048+MALLOC_OVERHEAD, (longlong) ULONGLONG_MAX, + MALLOC_OVERHEAD, 2048, 0}, {"join_cache_level", OPT_JOIN_CACHE_LEVEL, "Controls what join operations can be executed with join buffers. Odd numbers are used for plain join buffers while even numbers are used for linked buffers", &global_system_variables.join_cache_level, @@ -7376,7 +7396,8 @@ thread is in the relay logs.", "index_merge_union, index_merge_sort_union, index_merge_intersection, " "index_condition_pushdown, firstmatch, loosescan, materialization, " "semijoin, partial_match_rowid_merge, partial_match_table_scan, " - "subquery_cache" + "subquery_cache, outer_join_with_cache, semijoin_with_cache, " + "join_cache_incremental, join_cache_hashed, join_cache_bka" #ifndef DBUG_OFF ", table_elimination" #endif diff --git a/sql/opt_index_cond_pushdown.cc b/sql/opt_index_cond_pushdown.cc index 277343b81a5..cfd4ca246ce 100644 --- a/sql/opt_index_cond_pushdown.cc +++ b/sql/opt_index_cond_pushdown.cc @@ -272,12 +272,14 @@ Item *make_cond_remainder(Item *cond, bool exclude_index) in tab->select_cond keyno Index for which extract and push the condition other_tbls_ok TRUE <=> Fields of other non-const tables are allowed + factor_out TRUE <=> Factor out the extracted condition DESCRIPTION Try to extract and push the index condition down to table handler */ -void push_index_cond(JOIN_TAB *tab, uint keyno, bool other_tbls_ok) +void push_index_cond(JOIN_TAB *tab, uint keyno, bool other_tbls_ok, + bool factor_out) { DBUG_ENTER("push_index_cond"); Item *idx_cond; @@ -350,7 +352,8 @@ void push_index_cond(JOIN_TAB *tab, uint keyno, bool other_tbls_ok) if (idx_remainder_cond != idx_cond) tab->ref.disable_cache= TRUE; - Item *row_cond= make_cond_remainder(tab->select_cond, TRUE); + Item *row_cond= factor_out ? make_cond_remainder(tab->select_cond, TRUE) : + tab->pre_idx_push_select_cond; DBUG_EXECUTE("where", print_where(row_cond, "remainder cond", QT_ORDINARY);); diff --git a/sql/opt_subselect.h b/sql/opt_subselect.h index e9b93085aea..9de12774dec 100644 --- a/sql/opt_subselect.h +++ b/sql/opt_subselect.h @@ -199,7 +199,8 @@ public: double records= rows2double(s->table->file->stats.records); /* The cost is entire index scan cost (divided by 2) */ - double read_time= s->table->file->keyread_read_time(key, 1, records); + double read_time= + s->table->file->keyread_read_time(key, 1, (ha_rows) records); /* Now find out how many different keys we will get (for now we diff --git a/sql/set_var.cc b/sql/set_var.cc index 0eaa450d09c..69f6ebfadc1 100644 --- a/sql/set_var.cc +++ b/sql/set_var.cc @@ -318,6 +318,9 @@ static sys_var_thd_ulong sys_interactive_timeout(&vars, "interactive_timeout", &SV::net_interactive_timeout); static sys_var_thd_ulong sys_join_buffer_size(&vars, "join_buffer_size", &SV::join_buff_size); +static sys_var_thd_ulonglong sys_join_buffer_space_limit(&vars, + "join_buffer_space_limit", + &SV::join_buff_space_limit); static sys_var_thd_ulong sys_join_cache_level(&vars, "join_cache_level", &SV::join_cache_level); static sys_var_key_buffer_size sys_key_buffer_size(&vars, "key_buffer_size"); @@ -4052,7 +4055,7 @@ bool sys_var_thd_optimizer_switch:: symbolic_mode_representation(THD *thd, ulonglong val, LEX_STRING *rep) { - char buff[STRING_BUFFER_USUAL_SIZE*8]; + char buff[STRING_BUFFER_USUAL_SIZE*18]; String tmp(buff, sizeof(buff), &my_charset_latin1); int i; ulonglong bit; diff --git a/sql/sql_class.h b/sql/sql_class.h index fc5b15b3916..f7c7eff4274 100644 --- a/sql/sql_class.h +++ b/sql/sql_class.h @@ -380,6 +380,7 @@ struct system_variables ulonglong max_heap_table_size; ulonglong tmp_table_size; ulonglong long_query_time; + ulonglong join_buff_space_limit; ha_rows select_limit; ha_rows max_join_size; ulong auto_increment_increment, auto_increment_offset; diff --git a/sql/sql_join_cache.cc b/sql/sql_join_cache.cc index 10064590a75..c332193c57e 100644 --- a/sql/sql_join_cache.cc +++ b/sql/sql_join_cache.cc @@ -57,7 +57,7 @@ The function ignores the fields 'blob_length' and 'ofset' of the descriptor. - RETURN + RETURN VALUE the length of the field */ @@ -98,7 +98,7 @@ uint add_flag_field_to_join_cache(uchar *str, uint length, CACHE_FIELD **field) descriptor while 'descr_ptr' points to the position right after the last added pointer. - RETURN + RETURN VALUE the total length of the added fields */ @@ -152,7 +152,7 @@ uint add_table_data_fields_to_join_cache(JOIN_TAB *tab, The function sets 'with_match_flag' on if 'join_tab' needs a match flag i.e. if it is the first inner table of an outer join or a semi-join. - RETURN + RETURN VALUE none */ @@ -171,7 +171,7 @@ void JOIN_CACHE::calc_record_fields() for ( ; tab < join_tab ; tab++) { - calc_used_field_length(join->thd, tab); + tab->calc_used_field_length(FALSE); flag_fields+= test(tab->used_null_fields || tab->used_uneven_bit_fields); flag_fields+= test(tab->table->maybe_null); fields+= tab->used_fields; @@ -184,6 +184,72 @@ void JOIN_CACHE::calc_record_fields() fields+= flag_fields; } + +/* + Collect information on join key arguments + + SYNOPSIS + collect_info_on_key_args() + + DESCRIPTION + The function traverses the ref expressions that are used to access the + joined table join_tab. For each table 'tab' whose fields are to be stored + in the join buffer of the cache the function finds the fields from 'tab' + that occur in the ref expressions and marks these fields in the bitmap + tab->table->tmp_set. The function counts the number of them stored + in this cache and the total number of them stored in the previous caches + and saves the results of the counting in 'local_key_arg_fields' and 'external_key_arg_fields' respectively. + + NOTES + The function does not do anything if no key is used to join the records + from join_tab. + + RETURN VALUE + none +*/ + +void JOIN_CACHE::collect_info_on_key_args() +{ + JOIN_TAB *tab; + JOIN_CACHE *cache; + local_key_arg_fields= 0; + external_key_arg_fields= 0; + + if (!is_key_access()) + return; + + TABLE_REF *ref= &join_tab->ref; + cache= this; + do + { + for (tab= cache->join_tab-cache->tables; tab < cache->join_tab ; tab++) + { + uint key_args; + bitmap_clear_all(&tab->table->tmp_set); + for (uint i= 0; i < ref->key_parts; i++) + { + Item *ref_item= ref->items[i]; + if (!(tab->table->map & ref_item->used_tables())) + continue; + ref_item->walk(&Item::add_field_to_set_processor, 1, + (uchar *) tab->table); + } + if ((key_args= bitmap_bits_set(&tab->table->tmp_set))) + { + if (cache == this) + local_key_arg_fields+= key_args; + else + external_key_arg_fields+= key_args; + } + } + cache= cache->prev_cache; + } + while (cache); + + return; +} + + /* Allocate memory for descriptors and pointers to them associated with the cache @@ -195,23 +261,22 @@ void JOIN_CACHE::calc_record_fields() and the array of pointers to the field descriptors used to copy join record data from record buffers into the join buffer and backward. Some pointers refer to the field descriptor associated - with previous caches. They are placed at the beginning of the - array of pointers and its total number is specified by the parameter - 'external fields'. - The pointer of the first array is assigned to field_descr and the - number of elements is precalculated by the function calc_record_fields. + with previous caches. They are placed at the beginning of the array + of pointers and its total number is stored in external_key_arg_fields. + The pointer of the first array is assigned to field_descr and the number + of the elements in it is precalculated by the function calc_record_fields. The allocated arrays are adjacent. NOTES The memory is allocated in join->thd->memroot - RETURN + RETURN VALUE pointer to the first array */ -int JOIN_CACHE::alloc_fields(uint external_fields) +int JOIN_CACHE::alloc_fields() { - uint ptr_cnt= external_fields+blobs+1; + uint ptr_cnt= external_key_arg_fields+blobs+1; uint fields_size= sizeof(CACHE_FIELD)*fields; field_descr= (CACHE_FIELD*) sql_alloc(fields_size + sizeof(CACHE_FIELD*)*ptr_cnt); @@ -219,6 +284,7 @@ int JOIN_CACHE::alloc_fields(uint external_fields) return (field_descr == NULL); } + /* Create descriptors of the record flag fields stored in the join buffer @@ -252,7 +318,7 @@ int JOIN_CACHE::alloc_fields(uint external_fields) The function sets the value of 'length' to the total length of the flag fields. - RETURN + RETURN VALUE none */ @@ -295,17 +361,144 @@ void JOIN_CACHE::create_flag_fields() /* + Create descriptors of the fields used to build access keys to the joined table + + SYNOPSIS + create_key_arg_fields() + + DESCRIPTION + The function creates descriptors of the record fields stored in the join + buffer that are used to build access keys to the joined table. These + fields are put into the buffer ahead of other records fields stored in + the buffer. Such placement helps to optimize construction of access keys. + For each field that is used to build access keys to the joined table but + is stored in some other join cache buffer the function saves a pointer + to the the field descriptor. The array of such pointers are placed in the + the join cache structure just before the array of pointers to the + blob fields blob_ptr. + Any field stored in a join cache buffer that is used to construct keys + to access tables associated with other join caches is called a referenced + field. It receives a unique number that is saved by the function in the + member 'referenced_field_no' of the CACHE_FIELD descriptor for the field. + This number is used as index to the array of offsets to the referenced + fields that are saved and put in the join cache buffer after all record + fields. + The function also finds out whether that the keys to access join_tab + can be considered as embedded and, if so, sets the flag 'use_emb_key' in + this join cache appropriately. + + NOTES. + When a key to access the joined table 'join_tab' is constructed the array + of pointers to the field descriptors for the external fields is looked + through. For each of this pointers we find out in what previous key cache + the referenced field is stored. The value of 'referenced_field_no' + provides us with the index into the array of offsets for referenced + fields stored in the join cache. The offset read by the the index allows + us to read the field without reading all other fields of the record + stored the join cache buffer. This optimizes the construction of keys + to access 'join_tab' when some key arguments are stored in the previous + join caches. + + NOTES + The function does not do anything if no key is used to join the records + from join_tab. + + RETURN VALUE + none +*/ +void JOIN_CACHE::create_key_arg_fields() +{ + JOIN_TAB *tab; + JOIN_CACHE *cache; + + if (!is_key_access()) + return; + + /* + Save pointers to the cache fields in previous caches + that are used to build keys for this key access. + */ + cache= this; + uint ext_key_arg_cnt= external_key_arg_fields; + CACHE_FIELD *copy; + CACHE_FIELD **copy_ptr= blob_ptr; + while (ext_key_arg_cnt) + { + cache= cache->prev_cache; + for (tab= cache->join_tab-cache->tables; tab < cache->join_tab ; tab++) + { + CACHE_FIELD *copy_end; + MY_BITMAP *key_read_set= &tab->table->tmp_set; + /* key_read_set contains the bitmap of tab's fields referenced by ref */ + if (bitmap_is_clear_all(key_read_set)) + continue; + copy_end= cache->field_descr+cache->fields; + for (copy= cache->field_descr+cache->flag_fields; copy < copy_end; copy++) + { + /* + (1) - when we store rowids for DuplicateWeedout, they have + copy->field==NULL + */ + if (copy->field && // (1) + copy->field->table == tab->table && + bitmap_is_set(key_read_set, copy->field->field_index)) + { + *copy_ptr++= copy; + ext_key_arg_cnt--; + if (!copy->referenced_field_no) + { + /* + Register the referenced field 'copy': + - set the offset number in copy->referenced_field_no, + - adjust the value of the flag 'with_length', + - adjust the values of 'pack_length' and + of 'pack_length_with_blob_ptrs'. + */ + copy->referenced_field_no= ++cache->referenced_fields; + if (!cache->with_length) + { + cache->with_length= TRUE; + uint sz= cache->get_size_of_rec_length(); + cache->base_prefix_length+= sz; + cache->pack_length+= sz; + cache->pack_length_with_blob_ptrs+= sz; + } + cache->pack_length+= cache->get_size_of_fld_offset(); + cache->pack_length_with_blob_ptrs+= cache->get_size_of_fld_offset(); + } + } + } + } + } + /* After this 'blob_ptr' shall not be be changed */ + blob_ptr= copy_ptr; + + /* Now create local fields that are used to build ref for this key access */ + copy= field_descr+flag_fields; + for (tab= join_tab-tables; tab < join_tab ; tab++) + { + length+= add_table_data_fields_to_join_cache(tab, &tab->table->tmp_set, + &data_field_count, ©, + &data_field_ptr_count, + ©_ptr); + } + + use_emb_key= check_emb_key_usage(); + + return; +} + + +/* Create descriptors of all remaining data fields stored in the join buffer SYNOPSIS create_remaining_fields() - all_read_fields indicates that descriptors for all read data fields - are to be created DESCRIPTION The function creates descriptors for all remaining data fields of a - record from the join buffer. If the parameter 'all_read_fields' is - true the function creates fields for all read record fields that + record from the join buffer. If the value returned by is_key_access() is + false the function creates fields for all read record fields that comprise the partial join record joined with join_tab. Otherwise, for each table tab, the set of the read fields for which the descriptors have to be added is determined as the difference between all read fields @@ -315,7 +508,7 @@ void JOIN_CACHE::create_flag_fields() the added fields. NOTES - If 'all_read_fields' is false the function modifies the value of + If is_key_access() returns true the function modifies the value of tab->table->tmp_set for a each table whose fields are stored in the cache. The function calls the method Field::fill_cache_field to figure out the type of the cache field and the maximal length of its representation @@ -327,13 +520,14 @@ void JOIN_CACHE::create_flag_fields() contains the number of the pointers to such descriptors having been stored up to the moment. - RETURN + RETURN VALUE none */ -void JOIN_CACHE:: create_remaining_fields(bool all_read_fields) +void JOIN_CACHE:: create_remaining_fields() { JOIN_TAB *tab; + bool all_read_fields= !is_key_access(); CACHE_FIELD *copy= field_descr+flag_fields+data_field_count; CACHE_FIELD **copy_ptr= blob_ptr+data_field_ptr_count; @@ -372,6 +566,7 @@ void JOIN_CACHE:: create_remaining_fields(bool all_read_fields) } + /* Calculate and set all cache constants @@ -389,7 +584,7 @@ void JOIN_CACHE:: create_remaining_fields(bool all_read_fields) making a dicision whether more records should be added into the join buffer or not. - RETURN + RETURN VALUE none */ @@ -424,6 +619,8 @@ void JOIN_CACHE::set_constants() size_of_rec_ofs= offset_size(buff_size); size_of_rec_len= blobs ? size_of_rec_ofs : offset_size(len); size_of_fld_ofs= size_of_rec_len; + base_prefix_length= (with_length ? size_of_rec_len : 0) + + (prev_cache ? prev_cache->get_size_of_rec_offset() : 0); /* The size of the offsets for referenced fields will be added later. The values of 'pack_length' and 'pack_length_with_blob_ptrs' are adjusted @@ -437,236 +634,336 @@ void JOIN_CACHE::set_constants() /* - Allocate memory for a join buffer + Get maximum total length of all affixes of a record in the join cache buffer SYNOPSIS - alloc_buffer() + get_record_max_affix_length() DESCRIPTION - The function allocates a lump of memory for the cache join buffer. The - size of the allocated memory is 'buff_size' bytes. - - RETURN - 0 - if the memory has been successfully allocated - 1 - otherwise + The function calculates the maximum possible total length of all affixes + of a record in the join cache buffer, that is made of: + - the length of all prefixes used in this cache, + - the length of the match flag if it's needed + - the total length of the maximum possible offsets to the fields of + a record in the buffer. + + RETURN VALUE + The maximum total length of all affixes of a record in the join buffer +*/ + +uint JOIN_CACHE::get_record_max_affix_length() +{ + uint len= get_prefix_length() + + test(with_match_flag) + + size_of_fld_ofs * data_field_count; + return len; +} + + +/* + Get the minimum possible size of the cache join buffer + + SYNOPSIS + get_min_join_buffer_size() + + DESCRIPTION + At the first its invocation for the cache the function calculates the + minimum possible size of the join buffer of the cache. This value depends + on the minimal number of records 'min_records' to be stored in the join + buffer. The number is supposed to be determined by the procedure that + chooses the best access path to the joined table join_tab in the execution + plan. After the calculation of the interesting size the function saves it + in the field 'min_buff_size' in order to use it directly at the next + invocations of the function. + + NOTES + Currently the number of minimal records is just set to 1. + + RETURN VALUE + The minimal possible size of the join buffer of this cache */ -int JOIN_CACHE::alloc_buffer() +ulong JOIN_CACHE::get_min_join_buffer_size() { - buff= (uchar*) my_malloc(buff_size, MYF(0)); - return buff == NULL; -} - + if (!min_buff_size) + { + ulong len= 0; + for (JOIN_TAB *tab= join_tab-tables; tab < join_tab; tab++) + len+= tab->get_max_used_fieldlength(); + len+= get_record_max_affix_length() + get_max_key_addon_space_per_record(); + ulong min_sz= len*min_records; + ulong add_sz= 0; + for (uint i=0; i < min_records; i++) + add_sz+= join_tab_scan->aux_buffer_incr(i+1); + avg_aux_buffer_incr= add_sz/min_records; + min_sz+= add_sz; + min_sz+= pack_length_with_blob_ptrs; + min_buff_size= min_sz; + } + return min_buff_size; +} + /* - Initialize a BNL cache + Get the maximum possible size of the cache join buffer SYNOPSIS - init() + get_max_join_buffer_size() DESCRIPTION - The function initializes the cache structure. It supposed to be called - right after a constructor for the JOIN_CACHE_BNL. - The function allocates memory for the join buffer and for descriptors of - the record fields stored in the buffer. + At the first its invocation for the cache the function calculates the + maximum possible size of join buffer for the cache. This value does not + exceed the estimate of the number of records 'max_records' in the partial + join that joins tables from the first one through join_tab. This value + is also capped off by the value of join_tab->join_buffer_size_limit, if it + has been set a to non-zero value, and by the value of the system parameter + join_buffer_size - otherwise. After the calculation of the interesting size + the function saves the value in the field 'max_buff_size' in order to use + it directly at the next invocations of the function. NOTES - The code of this function should have been included into the constructor - code itself. However the new operator for the class JOIN_CACHE_BNL would - never fail while memory allocation for the join buffer is not absolutely - unlikely to fail. That's why this memory allocation has to be placed in a - separate function that is called in a couple with a cache constructor. - It is quite natural to put almost all other constructor actions into - this function. - - RETURN - 0 initialization with buffer allocations has been succeeded - 1 otherwise + Currently the value of join_tab->join_buffer_size_limit is initialized + to 0 and is never reset. + + RETURN VALUE + The maximum possible size of the join buffer of this cache */ -int JOIN_CACHE_BNL::init() +ulong JOIN_CACHE::get_max_join_buffer_size() { - DBUG_ENTER("JOIN_CACHE::init"); + if (!max_buff_size) + { + ulong max_sz; + ulong min_sz= get_min_join_buffer_size(); + ulong len= 0; + for (JOIN_TAB *tab= join_tab-tables; tab < join_tab; tab++) + len+= tab->get_used_fieldlength(); + len+= get_record_max_affix_length(); + avg_record_length= len; + len+= get_max_key_addon_space_per_record() + avg_aux_buffer_incr; + space_per_record= len; + + ulong limit_sz= join->thd->variables.join_buff_size; + if (join_tab->join_buffer_size_limit) + set_if_smaller(limit_sz, join_tab->join_buffer_size_limit); + if (limit_sz / max_records > space_per_record) + max_sz= space_per_record * max_records; + else + max_sz= limit_sz; + max_sz+= pack_length_with_blob_ptrs; + set_if_smaller(max_sz, limit_sz); + set_if_bigger(max_sz, min_sz); + max_buff_size= max_sz; + } + return max_buff_size; +} + - calc_record_fields(); +/* + Allocate memory for a join buffer - if (alloc_fields(0)) - DBUG_RETURN(1); + SYNOPSIS + alloc_buffer() - create_flag_fields(); + DESCRIPTION + The function allocates a lump of memory for the cache join buffer. + Initially the function sets the size of the buffer buff_size equal to + the value returned by get_max_join_buffer_size(). If the total size of + the space intended to be used for the join buffers employed by the + tables from the first one through join_tab exceeds the value of the + system parameter join_buff_space_limit, then the function first tries + to shrink the used buffers to make the occupied space fit the maximum + memory allowed to be used for all join buffers in total. After + this the function tries to allocate a join buffer for join_tab. + If it fails to do so, it decrements the requested size of the join + buffer, shrinks proportionally the join buffers used for the previous + tables and tries to allocate a buffer for join_tab. In the case of a + failure the function repeats its attempts with smaller and smaller + requested sizes of the buffer, but not more than 4 times. - create_remaining_fields(TRUE); + RETURN VALUE + 0 if the memory has been successfully allocated + 1 otherwise +*/ - set_constants(); +int JOIN_CACHE::alloc_buffer() +{ + JOIN_TAB *tab; + JOIN_CACHE *cache; + ulonglong curr_buff_space_sz= 0; + ulonglong curr_min_buff_space_sz= 0; + ulonglong join_buff_space_limit= + join->thd->variables.join_buff_space_limit; + double partial_join_cardinality= (join_tab-1)->get_partial_join_cardinality(); + buff= NULL; + min_buff_size= 0; + max_buff_size= 0; + min_records= 1; + max_records= partial_join_cardinality <= join_buff_space_limit ? + (ulonglong) partial_join_cardinality : join_buff_space_limit; + set_if_bigger(max_records, 10); + min_buff_size= get_min_join_buffer_size(); + buff_size= get_max_join_buffer_size(); + for (tab= join->join_tab+join->const_tables; tab <= join_tab; tab++) + { + cache= tab->cache; + if (cache) + { + curr_min_buff_space_sz+= cache->get_min_join_buffer_size(); + curr_buff_space_sz+= cache->get_join_buffer_size(); + } + } - if (alloc_buffer()) - DBUG_RETURN(1); - - reset(TRUE); + if (curr_min_buff_space_sz > join_buff_space_limit || + (curr_buff_space_sz > join_buff_space_limit && + join->shrink_join_buffers(join_tab, curr_buff_space_sz, + join_buff_space_limit))) + goto fail; + + for (ulong buff_size_decr= (buff_size-min_buff_size)/4 + 1; ; ) + { + ulong next_buff_size; - DBUG_RETURN(0); + if ((buff= (uchar*) my_malloc(buff_size, MYF(0)))) + break; + + next_buff_size= buff_size > buff_size_decr ? buff_size-buff_size_decr : 0; + if (next_buff_size < min_buff_size || + join->shrink_join_buffers(join_tab, curr_buff_space_sz, + curr_buff_space_sz-buff_size_decr)) + goto fail; + buff_size= next_buff_size; + + curr_buff_space_sz= 0; + for (tab= join->join_tab+join->const_tables; tab <= join_tab; tab++) + { + cache= tab->cache; + if (cache) + curr_buff_space_sz+= cache->get_join_buffer_size(); + } + } + return 0; + +fail: + buff_size= 0; + return 1; } + +/* + Shrink the size if the cache join buffer in a given ratio + + SYNOPSIS + shrink_join_buffer_in_ratio() + n nominator of the ratio to shrink the buffer in + d denominator if the ratio + + DESCRIPTION + The function first deallocates the join buffer of the cache. Then + it allocates a buffer that is (n/d) times smaller. + + RETURN VALUE + FALSE on success with allocation of the smaller join buffer + TRUE otherwise +*/ + +bool JOIN_CACHE::shrink_join_buffer_in_ratio(ulonglong n, ulonglong d) +{ + ulonglong next_buff_size; + if (n < d) + return FALSE; + next_buff_size= (ulonglong) ((double) buff_size / n * d); + set_if_bigger(next_buff_size, min_buff_size); + buff_size= next_buff_size; + return realloc_buffer(); +} + + +/* + Reallocate the join buffer of a join cache + + SYNOPSIS + realloc_buffer() + + DESCRITION + The function reallocates the join buffer of the join cache. After this + it resets the buffer for writing. + + NOTES + The function assumes that buff_size contains the new value for the join + buffer size. + + RETURN VALUE + 0 if the buffer has been successfully reallocated + 1 otherwise +*/ + +int JOIN_CACHE::realloc_buffer() +{ + int rc; + free(); + rc= test(!(buff= (uchar*) my_malloc(buff_size, MYF(0)))); + reset(TRUE); + return rc; +} + /* - Initialize a BKA cache + Initialize a join cache SYNOPSIS init() DESCRIPTION - The function initializes the cache structure. It supposed to be called - right after a constructor for the JOIN_CACHE_BKA. + The function initializes the join cache structure. It supposed to be called + by init methods for classes derived from the JOIN_CACHE. The function allocates memory for the join buffer and for descriptors of the record fields stored in the buffer. NOTES The code of this function should have been included into the constructor - code itself. However the new operator for the class JOIN_CACHE_BKA would + code itself. However the new operator for the class JOIN_CACHE would never fail while memory allocation for the join buffer is not absolutely unlikely to fail. That's why this memory allocation has to be placed in a separate function that is called in a couple with a cache constructor. It is quite natural to put almost all other constructor actions into this function. - RETURN + RETURN VALUE 0 initialization with buffer allocations has been succeeded 1 otherwise */ -int JOIN_CACHE_BKA::init() +int JOIN_CACHE::init() { - JOIN_TAB *tab; - JOIN_CACHE *cache; - local_key_arg_fields= 0; - external_key_arg_fields= 0; - DBUG_ENTER("JOIN_CACHE_BKA::init"); + DBUG_ENTER("JOIN_CACHE::init"); calc_record_fields(); - /* Mark all fields that can be used as arguments for this key access */ - TABLE_REF *ref= &join_tab->ref; - cache= this; - do - { - /* - Traverse the ref expressions and find the occurrences of fields in them for - each table 'tab' whose fields are to be stored in the 'cache' join buffer. - Mark these fields in the bitmap tab->table->tmp_set. - For these fields count the number of them stored in this cache and the - total number of them stored in the previous caches. Save the result - of the counting 'in local_key_arg_fields' and 'external_key_arg_fields' - respectively. - */ - for (tab= cache->join_tab-cache->tables; tab < cache->join_tab ; tab++) - { - uint key_args; - bitmap_clear_all(&tab->table->tmp_set); - for (uint i= 0; i < ref->key_parts; i++) - { - Item *ref_item= ref->items[i]; - if (!(tab->table->map & ref_item->used_tables())) - continue; - ref_item->walk(&Item::add_field_to_set_processor, 1, - (uchar *) tab->table); - } - if ((key_args= bitmap_bits_set(&tab->table->tmp_set))) - { - if (cache == this) - local_key_arg_fields+= key_args; - else - external_key_arg_fields+= key_args; - } - } - cache= cache->prev_cache; - } - while (cache); + collect_info_on_key_args(); - if (alloc_fields(external_key_arg_fields)) + if (alloc_fields()) DBUG_RETURN(1); create_flag_fields(); - - /* - Save pointers to the cache fields in previous caches - that are used to build keys for this key access. - */ - cache= this; - uint ext_key_arg_cnt= external_key_arg_fields; - CACHE_FIELD *copy; - CACHE_FIELD **copy_ptr= blob_ptr; - while (ext_key_arg_cnt) - { - cache= cache->prev_cache; - for (tab= cache->join_tab-cache->tables; tab < cache->join_tab ; tab++) - { - CACHE_FIELD *copy_end; - MY_BITMAP *key_read_set= &tab->table->tmp_set; - /* key_read_set contains the bitmap of tab's fields referenced by ref */ - if (bitmap_is_clear_all(key_read_set)) - continue; - copy_end= cache->field_descr+cache->fields; - for (copy= cache->field_descr+cache->flag_fields; copy < copy_end; copy++) - { - /* - (1) - when we store rowids for DuplicateWeedout, they have - copy->field==NULL - */ - if (copy->field && // (1) - copy->field->table == tab->table && - bitmap_is_set(key_read_set, copy->field->field_index)) - { - *copy_ptr++= copy; - ext_key_arg_cnt--; - if (!copy->referenced_field_no) - { - /* - Register the referenced field 'copy': - - set the offset number in copy->referenced_field_no, - - adjust the value of the flag 'with_length', - - adjust the values of 'pack_length' and - of 'pack_length_with_blob_ptrs'. - */ - copy->referenced_field_no= ++cache->referenced_fields; - cache->with_length= TRUE; - cache->pack_length+= cache->get_size_of_fld_offset(); - cache->pack_length_with_blob_ptrs+= cache->get_size_of_fld_offset(); - } - } - } - } - } - /* After this 'blob_ptr' shall not be be changed */ - blob_ptr= copy_ptr; - - /* Now create local fields that are used to build ref for this key access */ - copy= field_descr+flag_fields; - for (tab= join_tab-tables; tab < join_tab ; tab++) - { - length+= add_table_data_fields_to_join_cache(tab, &tab->table->tmp_set, - &data_field_count, ©, - &data_field_ptr_count, - ©_ptr); - } - use_emb_key= check_emb_key_usage(); + create_key_arg_fields(); - create_remaining_fields(FALSE); + create_remaining_fields(); set_constants(); if (alloc_buffer()) DBUG_RETURN(1); - - reset(TRUE); + + reset(TRUE); DBUG_RETURN(0); -} +} /* Check the possibility to read the access keys directly from the join buffer - SYNOPSIS check_emb_key_usage() @@ -693,13 +990,21 @@ int JOIN_CACHE_BKA::init() we still do not consider them embedded. In the future we'll expand the the class of keys which we identify as embedded. - RETURN - TRUE - key values will be considered as embedded, - FALSE - otherwise. + NOTES + The function returns FALSE if no key is used to join the records + from join_tab. + + RETURN VALUE + TRUE key values will be considered as embedded, + FALSE otherwise. */ -bool JOIN_CACHE_BKA::check_emb_key_usage() +bool JOIN_CACHE::check_emb_key_usage() { + + if (!is_key_access()) + return FALSE; + uint i; Item *item; KEY_PART_INFO *key_part; @@ -800,110 +1105,6 @@ bool JOIN_CACHE_BKA::check_emb_key_usage() /* - Calculate the increment of the MRR buffer for a record write - - SYNOPSIS - aux_buffer_incr() - - DESCRIPTION - This implementation of the virtual function aux_buffer_incr determines - for how much the size of the MRR buffer should be increased when another - record is added to the cache. - - RETURN - the increment of the size of the MRR buffer for the next record -*/ - -uint JOIN_CACHE_BKA::aux_buffer_incr() -{ - uint incr= 0; - TABLE_REF *ref= &join_tab->ref; - TABLE *tab= join_tab->table; - uint rec_per_key= tab->key_info[ref->key].rec_per_key[ref->key_parts-1]; - set_if_bigger(rec_per_key, 1); - if (records == 1) - incr= ref->key_length + tab->file->ref_length; - incr+= tab->file->stats.mrr_length_per_rec * rec_per_key; - return incr; -} - - -/* - Check if the record combination matches the index condition - - SYNOPSIS - JOIN_CACHE_BKA::skip_index_tuple() - rseq Value returned by bka_range_seq_init() - range_info MRR range association data - - DESCRIPTION - This function is invoked from MRR implementation to check if an index - tuple matches the index condition. It is used in the case where the index - condition actually depends on both columns of the used index and columns - from previous tables. - - Accessing columns of the previous tables requires special handling with - BKA. The idea of BKA is to collect record combinations in a buffer and - then do a batch of ref access lookups, i.e. by the time we're doing a - lookup its previous-records-combination is not in prev_table->record[0] - but somewhere in the join buffer. - - We need to get it from there back into prev_table(s)->record[0] before we - can evaluate the index condition, and that's why we need this function - instead of regular IndexConditionPushdown. - - NOTE - Possible optimization: - Before we unpack the record from a previous table - check if this table is used in the condition. - If so then unpack the record otherwise skip the unpacking. - This should be done by a special virtual method - get_partial_record_by_pos(). - - RETURN - 0 The record combination satisfies the index condition - 1 Otherwise -*/ - -bool JOIN_CACHE_BKA::skip_index_tuple(range_seq_t rseq, char *range_info) -{ - DBUG_ENTER("JOIN_CACHE_BKA::skip_index_tuple"); - JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq; - cache->get_record_by_pos((uchar*)range_info); - DBUG_RETURN(!join_tab->cache_idx_cond->val_int()); -} - - -/* - Check if the record combination matches the index condition - - SYNOPSIS - bka_skip_index_tuple() - rseq Value returned by bka_range_seq_init() - range_info MRR range association data - - DESCRIPTION - This is wrapper for JOIN_CACHE_BKA::skip_index_tuple method, - see comments there. - - NOTE - This function is used as a RANGE_SEQ_IF::skip_index_tuple callback. - - RETURN - 0 The record combination satisfies the index condition - 1 Otherwise -*/ - -static -bool bka_skip_index_tuple(range_seq_t rseq, char *range_info) -{ - DBUG_ENTER("bka_skip_index_tuple"); - JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq; - DBUG_RETURN(cache->skip_index_tuple(rseq, range_info)); -} - - -/* Write record fields and their required offsets into the join cache buffer SYNOPSIS @@ -942,9 +1143,11 @@ bool bka_skip_index_tuple(range_seq_t rseq, char *range_info) The 'last_rec_blob_data_is_in_rec_buff' is set on if the blob data remains in the record buffers and not copied to the join buffer. It may happen only to the blob data from the last record added into the cache. - - - RETURN + If on_precond is attached to join_tab and it is not evaluated to TRUE + then MATCH_IMPOSSIBLE is placed in the match flag field of the record + written into the join buffer. + + RETURN VALUE length of the written record data */ @@ -954,16 +1157,18 @@ uint JOIN_CACHE::write_record_data(uchar * link, bool *is_full) bool last_record; CACHE_FIELD *copy; CACHE_FIELD *copy_end; + uchar *flags_pos; uchar *cp= pos; uchar *init_pos= cp; uchar *rec_len_ptr= 0; + uint key_extra= extra_key_length(); records++; /* Increment the counter of records in the cache */ - len= pack_length; + len= pack_length + key_extra; /* Make an adjustment for the size of the auxiliary buffer if there is any */ - uint incr= aux_buffer_incr(); + uint incr= aux_buffer_incr(records); ulong rem= rem_space(); aux_buff_size+= len+incr < rem ? incr : rem; @@ -1000,7 +1205,7 @@ uint JOIN_CACHE::write_record_data(uchar * link, bool *is_full) This function is called only in the case when there is enough space left in the cache to store at least non-blob parts of the current record. */ - last_record= (len+pack_length_with_blob_ptrs) > rem_space(); + last_record= (len+pack_length_with_blob_ptrs+key_extra) > rem_space(); /* Save the position for the length of the record in the cache if it's needed. @@ -1032,6 +1237,7 @@ uint JOIN_CACHE::write_record_data(uchar * link, bool *is_full) /* First put into the cache the values of all flag fields */ copy_end= field_descr+flag_fields; + flags_pos= cp; for ( ; copy < copy_end; copy++) { memcpy(cp, copy->str, copy->length); @@ -1134,6 +1340,20 @@ uint JOIN_CACHE::write_record_data(uchar * link, bool *is_full) last_rec_pos= curr_rec_pos; end_pos= pos= cp; *is_full= last_record; + + if (!join_tab->first_unmatched && join_tab->on_precond) + { + join_tab->found= 0; + join_tab->not_null_compl= 1; + if (!join_tab->on_precond->val_int()) + { + flags_pos[0]= MATCH_IMPOSSIBLE; + last_written_is_null_compl= 1; + } + } + else + last_written_is_null_compl= 0; + return (uint) (cp-init_pos); } @@ -1158,7 +1378,7 @@ uint JOIN_CACHE::write_record_data(uchar * link, bool *is_full) - the size of the auxiliary buffer is reset to 0, - the flag 'last_rec_blob_data_is_in_rec_buff' is set to 0. - RETURN + RETURN VALUE none */ @@ -1176,6 +1396,7 @@ void JOIN_CACHE::reset(bool for_writing) } } + /* Add a record into the join buffer: the default implementation @@ -1190,7 +1411,7 @@ void JOIN_CACHE::reset(bool for_writing) The implementation assumes that the function get_curr_link() will return exactly the pointer to this matched record. - RETURN + RETURN VALUE TRUE if it has been decided that it should be the last record in the join buffer, FALSE otherwise @@ -1227,9 +1448,9 @@ bool JOIN_CACHE::put_record() point to the beginning of the first field of the record in the join buffer. - RETURN - TRUE - there are no more records to read from the join buffer - FALSE - otherwise + RETURN VALUE + TRUE there are no more records to read from the join buffer + FALSE otherwise */ bool JOIN_CACHE::get_record() @@ -1268,7 +1489,7 @@ bool JOIN_CACHE::get_record() from the the join buffers of the previous caches. The fields are read into the corresponding record buffers. - RETURN + RETURN VALUE none */ @@ -1287,7 +1508,7 @@ void JOIN_CACHE::get_record_by_pos(uchar *rec_ptr) /* - Test the match flag from the referenced record: the default implementation + Get the match flag from the referenced record: the default implementation SYNOPSIS get_match_flag_by_pos() @@ -1295,30 +1516,55 @@ void JOIN_CACHE::get_record_by_pos(uchar *rec_ptr) DESCRIPTION This default implementation of the virtual function get_match_flag_by_pos - test the match flag for the record pointed by the reference at the position - rec_ptr. If the match flag in placed one of the previous buffers the function - first reaches the linked record fields in this buffer. + get the match flag for the record pointed by the reference at the position + rec_ptr. If the match flag is placed in one of the previous buffers the + function first reaches the linked record fields in this buffer. - RETURN - TRUE if the match flag is set on - FALSE otherwise + RETURN VALUE + match flag for the record at the position rec_ptr */ -bool JOIN_CACHE::get_match_flag_by_pos(uchar *rec_ptr) +enum JOIN_CACHE::Match_flag JOIN_CACHE::get_match_flag_by_pos(uchar *rec_ptr) { + Match_flag match_fl= MATCH_NOT_FOUND; if (with_match_flag) - return test(*rec_ptr); + { + match_fl= (enum Match_flag) rec_ptr[0]; + return match_fl; + } if (prev_cache) { uchar *prev_rec_ptr= prev_cache->get_rec_ref(rec_ptr); return prev_cache->get_match_flag_by_pos(prev_rec_ptr); } DBUG_ASSERT(0); - return FALSE; + return match_fl; } /* + Calculate the increment of the auxiliary buffer for a record write + + SYNOPSIS + aux_buffer_incr() + recno the number of the record the increment to be calculated for + + DESCRIPTION + This function calls the aux_buffer_incr the method of the + companion member join_tab_scan to calculate the growth of the + auxiliary buffer when the recno-th record is added to the + join_buffer of this cache. + + RETURN VALUE + the number of bytes in the increment +*/ + +uint JOIN_CACHE::aux_buffer_incr(ulong recno) +{ + return join_tab_scan->aux_buffer_incr(recno); +} + +/* Read all flag and data fields of a record from the join buffer SYNOPSIS @@ -1332,8 +1578,8 @@ bool JOIN_CACHE::get_match_flag_by_pos(uchar *rec_ptr) The function increments the value of 'pos' by the length of the read data. - RETURN - (-1) - if there is no more records in the join buffer + RETURN VALUE + (-1) if there is no more records in the join buffer length of the data read from the join buffer - otherwise */ @@ -1371,7 +1617,7 @@ uint JOIN_CACHE::read_all_record_fields() The function increments the value of 'pos' by the length of the read data. - RETURN + RETURN VALUE length of the data read from the join buffer */ @@ -1380,6 +1626,12 @@ uint JOIN_CACHE::read_flag_fields() uchar *init_pos= pos; CACHE_FIELD *copy= field_descr; CACHE_FIELD *copy_end= copy+flag_fields; + if (with_match_flag) + { + copy->str[0]= test((Match_flag) pos[0] == MATCH_FOUND); + pos+= copy->length; + copy++; + } for ( ; copy < copy_end; copy++) { memcpy(copy->str, pos, copy->length); @@ -1406,7 +1658,7 @@ uint JOIN_CACHE::read_flag_fields() The function increments the value of 'pos' by the length of the read data. - RETURN + RETURN VALUE length of the data read from the join buffer */ @@ -1486,7 +1738,7 @@ uint JOIN_CACHE::read_record_field(CACHE_FIELD *copy, bool blob_in_rec_buff) values. Otherwise *len is supposed to provide this value that has been obtained earlier. - RETURN + RETURN VALUE TRUE 'copy' points to a data descriptor of this join cache FALSE otherwise */ @@ -1530,30 +1782,69 @@ bool JOIN_CACHE::read_referenced_field(CACHE_FIELD *copy, /* - Skip record from join buffer if its match flag is on: default implementation + Skip record from join buffer if's already matched: default implementation SYNOPSIS - skip_record_if_match() + skip_if_matched() DESCRIPTION - This default implementation of the virtual function skip_record_if_match - skips the next record from the join buffer if its match flag is set on. - If the record is skipped the value of 'pos' is set to points to the position + This default implementation of the virtual function skip_if_matched + skips the next record from the join buffer if its match flag is set to + MATCH_FOUND. + If the record is skipped the value of 'pos' is set to point to the position right after the record. - RETURN - TRUE - the match flag is on and the record has been skipped - FALSE - the match flag is off + RETURN VALUE + TRUE the match flag is set to MATCH_FOUND and the record has been skipped + FALSE otherwise */ -bool JOIN_CACHE::skip_record_if_match() +bool JOIN_CACHE::skip_if_matched() { DBUG_ASSERT(with_length); uint offset= size_of_rec_len; if (prev_cache) offset+= prev_cache->get_size_of_rec_offset(); - /* Check whether the match flag is on */ - if (get_match_flag_by_pos(pos+offset)) + /* Check whether the match flag is MATCH_FOUND */ + if (get_match_flag_by_pos(pos+offset) == MATCH_FOUND) + { + pos+= size_of_rec_len + get_rec_length(pos); + return TRUE; + } + return FALSE; +} + + +/* + Skip record from join buffer if the match isn't needed: default implementation + + SYNOPSIS + skip_if_not_needed_match() + + DESCRIPTION + This default implementation of the virtual function skip_if_not_needed_match + skips the next record from the join buffer if its match flag is not + MATCH_NOT_FOUND, and, either its value is MATCH_FOUND and join_tab is the + first inner table of an inner join, or, its value is MATCH_IMPOSSIBLE + and join_tab is the first inner table of an outer join. + If the record is skipped the value of 'pos' is set to point to the position + right after the record. + + RETURN VALUE + TRUE the record has to be skipped + FALSE otherwise +*/ + +bool JOIN_CACHE::skip_if_not_needed_match() +{ + DBUG_ASSERT(with_length); + enum Match_flag match_fl; + uint offset= size_of_rec_len; + if (prev_cache) + offset+= prev_cache->get_size_of_rec_offset(); + + if ((match_fl= get_match_flag_by_pos(pos+offset)) != MATCH_NOT_FOUND && + (join_tab->check_only_first_match() == (match_fl == MATCH_FOUND)) ) { pos+= size_of_rec_len + get_rec_length(pos); return TRUE; @@ -1617,7 +1908,7 @@ void JOIN_CACHE::restore_last_record() that have matches, after which null complementing extension for all unmatched records from the join buffer are generated. - RETURN + RETURN VALUE return one of enum_nested_loop_state, except NESTED_LOOP_NO_MORE_ROWS. */ @@ -1711,16 +2002,16 @@ finish: } -/* - Using BNL find matches from the next table for records from the join buffer +/* + Find matches from the next table for records from the join buffer SYNOPSIS join_matching_records() skip_last do not look for matches for the last partial join record DESCRIPTION - The function retrieves all rows of the join_tab table and check whether - they match partial join records from the join buffer. If a match is found + The function retrieves rows of the join_tab table and checks whether they + match partial join records from the join buffer. If a match is found the function will call the sub_select function trying to look for matches for the remaining join operations. This function currently is called only from the function join_records. @@ -1729,27 +2020,46 @@ finish: the future processing in the caller function. NOTES + If employed by BNL or BNLH join algorithms the function performs a full + scan of join_tab for each refill of the join buffer. If BKA or BKAH + algorithms are used then the function iterates only over those records + from join_tab that can be accessed by keys built over records in the join + buffer. To apply a proper method of iteration the function just calls + virtual iterator methods (open, next, close) of the member join_tab_scan. + The member can be either of the JOIN_TAB_SCAN or JOIN_TAB_SCAN_MMR type. + The class JOIN_TAB_SCAN provides the iterator methods for BNL/BNLH join + algorithms. The class JOIN_TAB_SCAN_MRR provides the iterator methods + for BKA/BKAH join algorithms. + When the function looks for records from the join buffer that would + match a record from join_tab it iterates either over all records in + the buffer or only over selected records. If BNL join operation is + performed all records are checked for the match. If BNLH or BKAH + algorithm is employed to join join_tab then the function looks only + through the records with the same join key as the record from join_tab. + With the BKA join algorithm only one record from the join buffer is checked + for a match for any record from join_tab. To iterate over the candidates + for a match the virtual function get_next_candidate_for_match is used, + while the virtual function prepare_look_for_matches is called to prepare + for such iteration proccess. + + NOTES The function produces all matching extensions for the records in the - join buffer following the path of the Blocked Nested Loops algorithm. + join buffer following the path of the employed blocked algorithm. When an outer join operation is performed all unmatched records from the join buffer must be extended by null values. The function 'join_null_complements' serves this purpose. - RETURN - return one of enum_nested_loop_state. + RETURN VALUE + return one of enum_nested_loop_state */ -enum_nested_loop_state JOIN_CACHE_BNL::join_matching_records(bool skip_last) +enum_nested_loop_state JOIN_CACHE::join_matching_records(bool skip_last) { - uint cnt; int error; - JOIN_TAB *tab; - READ_RECORD *info; enum_nested_loop_state rc= NESTED_LOOP_OK; - bool check_only_first_match= join_tab->check_only_first_match(); - SQL_SELECT *select= join_tab->cache_select; - join_tab->table->null_row= 0; + bool check_only_first_match= join_tab->check_only_first_match(); + bool outer_join_first_inner= join_tab->is_first_inner_for_outer_join(); /* Return at once if there are no records in the join buffer */ if (!records) @@ -1771,25 +2081,12 @@ enum_nested_loop_state JOIN_CACHE_BNL::join_matching_records(bool skip_last) join_tab->select->quick= 0; } - for (tab= join->join_tab; tab != join_tab ; tab++) - { - tab->status= tab->table->status; - tab->table->status= 0; - } - - /* Start retrieving all records of the joined table */ - if ((error= join_init_read_record(join_tab))) - { - rc= error < 0 ? NESTED_LOOP_NO_MORE_ROWS: NESTED_LOOP_ERROR; + /* Prepare to retrieve all records of the joined table */ + if ((error= join_tab_scan->open())) goto finish; - } - info= &join_tab->read_record; - do + while (!(error= join_tab_scan->next())) { - if (join_tab->keep_current_rowid) - join_tab->table->file->position(join_tab->table->record[0]); - if (join->thd->killed) { /* The user has aborted the execution of the query */ @@ -1797,52 +2094,43 @@ enum_nested_loop_state JOIN_CACHE_BNL::join_matching_records(bool skip_last) rc= NESTED_LOOP_KILLED; goto finish; } - int err= 0; - if (rc == NESTED_LOOP_OK) - update_virtual_fields(join->thd, join_tab->table); - - /* - Do not look for matches if the last read record of the joined table - does not meet the conditions that have been pushed to this table - */ - if (rc == NESTED_LOOP_OK && - (!select || (err= select->skip_record(join->thd)) != 0)) - { - if (err < 0) - return NESTED_LOOP_ERROR; - rc= NESTED_LOOP_OK; - - /* Prepare to read records from the join buffer */ - reset(FALSE); + if (join_tab->keep_current_rowid) + join_tab->table->file->position(join_tab->table->record[0]); + + /* Prepare to read matching candidates from the join buffer */ + if (prepare_look_for_matches(skip_last)) + continue; - /* Read each record from the join buffer and look for matches */ - for (cnt= records - test(skip_last) ; cnt; cnt--) - { - /* - If only the first match is needed and it has been already found for - the next record read from the join buffer then the record is skipped. - */ - if (!check_only_first_match || !skip_record_if_match()) - { - get_record(); - rc= generate_full_extensions(get_curr_rec()); - if (rc != NESTED_LOOP_OK && rc != NESTED_LOOP_NO_MORE_ROWS) - goto finish; - } + uchar *rec_ptr; + /* Read each possible candidate from the buffer and look for matches */ + while ((rec_ptr= get_next_candidate_for_match())) + { + /* + If only the first match is needed, and, it has been already found for + the next record read from the join buffer, then the record is skipped. + Also those records that must be null complemented are not considered + as candidates for matches. + */ + if ((!check_only_first_match && !outer_join_first_inner) || + !skip_next_candidate_for_match(rec_ptr)) + { + read_next_candidate_for_match(rec_ptr); + rc= generate_full_extensions(rec_ptr); + if (rc != NESTED_LOOP_OK && rc != NESTED_LOOP_NO_MORE_ROWS) + goto finish; } } - } while (!(error= info->read_record(info))); + } - if (error > 0) // Fatal error - rc= NESTED_LOOP_ERROR; -finish: - for (tab= join->join_tab; tab != join_tab ; tab++) - tab->table->status= tab->status; +finish: + if (error) + rc= error < 0 ? NESTED_LOOP_NO_MORE_ROWS: NESTED_LOOP_ERROR; + join_tab_scan->close(); return rc; } - + /* Set match flag for a record in join buffer if it has not been set yet @@ -1862,7 +2150,7 @@ finish: The function assumes that the match flag for any record in any cache is placed in the first byte occupied by the record fields. - RETURN + RETURN VALUE TRUE the match flag is set by this call for the first time FALSE the match flag has been set before this call */ @@ -1914,7 +2202,7 @@ bool JOIN_CACHE::set_match_flag_if_none(JOIN_TAB *first_inner, case the function calls the join_tab->next_select method to generate all full extension for this partial join match. - RETURN + RETURN VALUE return one of enum_nested_loop_state. */ @@ -1969,7 +2257,7 @@ enum_nested_loop_state JOIN_CACHE::generate_full_extensions(uchar *rec_ptr) Setting the match flag on can trigger re-evaluation of pushdown conditions for the record when join_tab is the last inner table of an outer join. - RETURN + RETURN VALUE TRUE there is a match FALSE there is no match */ @@ -1977,7 +2265,7 @@ enum_nested_loop_state JOIN_CACHE::generate_full_extensions(uchar *rec_ptr) inline bool JOIN_CACHE::check_match(uchar *rec_ptr) { /* Check whether pushdown conditions are satisfied */ - if (join_tab->select && join_tab->select->skip_record(join->thd) < 1) + if (join_tab->select && join_tab->select->skip_record(join->thd) <= 0) return FALSE; if (!join_tab->is_last_inner_table()) @@ -2007,7 +2295,7 @@ inline bool JOIN_CACHE::check_match(uchar *rec_ptr) */ for (JOIN_TAB *tab= first_inner; tab <= join_tab; tab++) { - if (tab->select && tab->select->skip_record(join->thd) < 1) + if (tab->select && tab->select->skip_record(join->thd) <= 0) return FALSE; } } @@ -2038,9 +2326,9 @@ inline bool JOIN_CACHE::check_match(uchar *rec_ptr) NOTES The same implementation of the virtual method join_null_complements - is used for JOIN_CACHE_BNL and JOIN_CACHE_BKA. + is used for BNL/BNLH/BKA/BKA join algorthm. - RETURN + RETURN VALUE return one of enum_nested_loop_state. */ @@ -2049,7 +2337,6 @@ enum_nested_loop_state JOIN_CACHE::join_null_complements(bool skip_last) uint cnt; enum_nested_loop_state rc= NESTED_LOOP_OK; bool is_first_inner= join_tab == join_tab->first_unmatched; - bool is_last_inner= join_tab == join_tab->first_unmatched->last_inner; /* Return at once if there are no records in the join buffer */ if (!records) @@ -2070,40 +2357,16 @@ enum_nested_loop_state JOIN_CACHE::join_null_complements(bool skip_last) goto finish; } /* Just skip the whole record if a match for it has been already found */ - if (!is_first_inner || !skip_record_if_match()) + if (!is_first_inner || !skip_if_matched()) { get_record(); /* The outer row is complemented by nulls for each inner table */ restore_record(join_tab->table, s->default_values); mark_as_null_row(join_tab->table); - /* Check all pushdown conditions attached to the inner table */ - join_tab->first_unmatched->found= 1; - if (join_tab->select && join_tab->select->skip_record(join->thd) < 1) - continue; - if (is_last_inner) - { - JOIN_TAB *first_upper= join_tab->first_unmatched->first_upper; - while (first_upper && first_upper->last_inner == join_tab) - { - set_match_flag_if_none(first_upper, get_curr_rec()); - for (JOIN_TAB* tab= first_upper; tab <= join_tab; tab++) - { - if (tab->select && tab->select->skip_record(join->thd) < 1) - goto next; - } - first_upper= first_upper->first_upper; - } - } - /* Find all matches for the remaining join tables */ - rc= (*join_tab->next_select)(join, join_tab+1, 0); + rc= generate_full_extensions(get_curr_rec()); if (rc != NESTED_LOOP_OK && rc != NESTED_LOOP_NO_MORE_ROWS) - { - reset(TRUE); goto finish; - } } - next: - ; } finish: @@ -2112,475 +2375,133 @@ finish: /* - Initialize retrieval of range sequence for BKA algorithm - - SYNOPSIS - bka_range_seq_init() - init_params pointer to the BKA join cache object - n_ranges the number of ranges obtained - flags combination of HA_MRR_SINGLE_POINT, HA_MRR_FIXED_KEY - - DESCRIPTION - The function interprets init_param as a pointer to a JOIN_CACHE_BKA - object. The function prepares for an iteration over the join keys - built for all records from the cache join buffer. - - NOTE - This function are used only as a callback function. - - RETURN - init_param value that is to be used as a parameter of bka_range_seq_next() -*/ - -static -range_seq_t bka_range_seq_init(void *init_param, uint n_ranges, uint flags) -{ - DBUG_ENTER("bka_range_seq_init"); - JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) init_param; - cache->reset(0); - DBUG_RETURN((range_seq_t) init_param); -} - - -/* - Get the key over the next record from the join buffer used by BKA - - SYNOPSIS - bka_range_seq_next() - seq the value returned by bka_range_seq_init - range OUT reference to the next range - - DESCRIPTION - The function interprets seq as a pointer to a JOIN_CACHE_BKA - object. The function returns a pointer to the range descriptor - for the key built over the next record from the join buffer. - - NOTE - This function are used only as a callback function. - - RETURN - 0 ok, the range structure filled with info about the next key - 1 no more ranges -*/ - -static -uint bka_range_seq_next(range_seq_t rseq, KEY_MULTI_RANGE *range) -{ - DBUG_ENTER("bka_range_seq_next"); - JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq; - TABLE_REF *ref= &cache->join_tab->ref; - key_range *start_key= &range->start_key; - if ((start_key->length= cache->get_next_key((uchar **) &start_key->key))) - { - start_key->keypart_map= (1 << ref->key_parts) - 1; - start_key->flag= HA_READ_KEY_EXACT; - range->end_key= *start_key; - range->end_key.flag= HA_READ_AFTER_KEY; - range->ptr= (char *) cache->get_curr_rec(); - range->range_flag= EQ_RANGE; - DBUG_RETURN(0); - } - DBUG_RETURN(1); -} - - -/* - Check whether range_info orders to skip the next record from BKA buffer + Add a comment on the join algorithm employed by the join cache SYNOPSIS - bka_range_seq_skip_record() - seq value returned by bka_range_seq_init() - range_info information about the next range - rowid [NOT USED] rowid of the record to be checked + print_explain_comment() + str string to add the comment on the employed join algorithm to - DESCRIPTION - The function interprets seq as a pointer to a JOIN_CACHE_BKA object. - The function interprets seq as a pointer to the JOIN_CACHE_BKA_UNIQUE - object. The function returns TRUE if the record with this range_info - is to be filtered out from the stream of records returned by - multi_range_read_next(). - - NOTE - This function are used only as a callback function. + This function adds info on the type of the used join buffer (flat or + incremental) and on the type of the the employed join algorithm (BNL, + BNLH, BKA or BKAH) to the the end of the sring str. - RETURN - 1 record with this range_info is to be filtered out from the stream - of records returned by multi_range_read_next() - 0 the record is to be left in the stream + RETURN VALUE + none */ -static -bool bka_range_seq_skip_record(range_seq_t rseq, char *range_info, uchar *rowid) +void JOIN_CACHE::print_explain_comment(String *str) { - DBUG_ENTER("bka_range_seq_skip_record"); - JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq; - bool res= cache->get_match_flag_by_pos((uchar *) range_info); - DBUG_RETURN(res); -} - -/* - Using BKA find matches from the next table for records from the join buffer - - SYNOPSIS - join_matching_records() - skip_last do not look for matches for the last partial join record - - DESCRIPTION - This function can be used only when the table join_tab can be accessed - by keys built over the fields of previous join tables. - The function retrieves all partial join records from the join buffer and - for each of them builds the key value to access join_tab, performs index - look-up with this key and selects matching records yielded by this look-up - If a match is found the function will call the sub_select function trying - to look for matches for the remaining join operations. - This function currently is called only from the function join_records. - It's assumed that this function is always called with the skip_last - parameter equal to false. - - NOTES - The function produces all matching extensions for the records in the - join buffer following the path of the Batched Key Access algorithm. - When an outer join operation is performed all unmatched records from - the join buffer must be extended by null values. The function - join_null_complements serves this purpose. - The Batched Key Access algorithm assumes that key accesses are batched. - In other words it assumes that, first, either keys themselves or the - corresponding rowids (primary keys) are accumulated in a buffer, then - data rows from join_tab are fetched for all of them. When a row is - fetched it is always returned with a reference to the key by which it - has been accessed. - When key values are batched we can save on the number of the server - requests for index lookups. For the remote engines, like NDB cluster, it - essentially reduces the number of round trips between the server and - the engine when performing a join operation. - When the rowids for the keys are batched we can optimize the order - in what we fetch the data for this rowids. The performance benefits of - this optimization can be significant for such engines as MyISAM, InnoDB. - What is exactly batched are hidden behind implementations of - MRR handler interface that is supposed to be appropriately chosen - for each engine. If for a engine no specific implementation of the MRR - interface is supllied then the default implementation is used. This - implementation actually follows the path of Nested Loops Join algorithm. - In this case BKA join surely will demonstrate a worse performance than - NL join. - - RETURN - return one of enum_nested_loop_state -*/ - -enum_nested_loop_state JOIN_CACHE_BKA::join_matching_records(bool skip_last) -{ - int error; - handler *file= join_tab->table->file; - enum_nested_loop_state rc= NESTED_LOOP_OK; - uchar *rec_ptr= 0; - bool check_only_first_match= join_tab->check_only_first_match(); - - /* Set functions to iterate over keys in the join buffer */ - - RANGE_SEQ_IF seq_funcs= { bka_range_seq_init, - bka_range_seq_next, - check_only_first_match ? - bka_range_seq_skip_record : 0, - join_tab->cache_idx_cond ? - bka_skip_index_tuple : 0 }; - - /* The value of skip_last must be always FALSE when this function is called */ - DBUG_ASSERT(!skip_last); - - /* Return at once if there are no records in the join buffer */ - if (!records) - return NESTED_LOOP_OK; - - rc= init_join_matching_records(&seq_funcs, records); - if (rc != NESTED_LOOP_OK) - goto finish; - - while (!(error= file->multi_range_read_next((char **) &rec_ptr))) - { - if (join->thd->killed) - { - /* The user has aborted the execution of the query */ - join->thd->send_kill_message(); - rc= NESTED_LOOP_KILLED; - goto finish; - } - if (join_tab->keep_current_rowid) - join_tab->table->file->position(join_tab->table->record[0]); - /* - If only the first match is needed and it has been already found - for the associated partial join record then the returned candidate - is discarded. - */ - if (rc == NESTED_LOOP_OK && - (!check_only_first_match || !get_match_flag_by_pos(rec_ptr))) - { - get_record_by_pos(rec_ptr); - update_virtual_fields(join->thd, join_tab->table); - rc= generate_full_extensions(rec_ptr); - if (rc != NESTED_LOOP_OK && rc != NESTED_LOOP_NO_MORE_ROWS) - goto finish; - } - } - - if (error > 0 && error != HA_ERR_END_OF_FILE) - return NESTED_LOOP_ERROR; -finish: - return end_join_matching_records(rc); -} - - - -/* - Prepare to search for records that match records from the join buffer - - SYNOPSIS - init_join_matching_records() - seq_funcs structure of range sequence interface - ranges number of keys/ranges in the sequence - - DESCRIPTION - This function calls the multi_range_read_init function to set up - the BKA process of generating the keys from the records in the join - buffer and looking for matching records from the table to be joined. - The function passes as a parameter a structure of functions that - implement the range sequence interface. This interface is used to - enumerate all generated keys and optionally to filter the matching - records returned by the multi_range_read_next calls from the - intended invocation of the join_matching_records method. The - multi_range_read_init function also receives the parameters for - MRR buffer to be used and flags specifying the mode in which - this buffer will be functioning. - The number of keys in the sequence expected by multi_range_read_init - is passed through the parameter ranges. - - RETURN - return one of enum_nested_loop_state -*/ - -enum_nested_loop_state -JOIN_CACHE_BKA::init_join_matching_records(RANGE_SEQ_IF *seq_funcs, uint ranges) -{ - int error; - handler *file= join_tab->table->file; - enum_nested_loop_state rc= NESTED_LOOP_OK; - - join_tab->table->null_row= 0; - - - /* Dynamic range access is never used with BKA */ - DBUG_ASSERT(join_tab->use_quick != 2); - - for (JOIN_TAB *tab =join->join_tab; tab != join_tab ; tab++) - { - tab->status= tab->table->status; - tab->table->status= 0; - } - - init_mrr_buff(); - - /* - Prepare to iterate over keys from the join buffer and to get - matching candidates obtained with MMR handler functions. - */ - if (!file->inited) - file->ha_index_init(join_tab->ref.key, 1); - if ((error= file->multi_range_read_init(seq_funcs, (void*) this, ranges, - mrr_mode, &mrr_buff))) - rc= error < 0 ? NESTED_LOOP_NO_MORE_ROWS: NESTED_LOOP_ERROR; + str->append(STRING_WITH_LEN(" (")); + const char *buffer_type= prev_cache ? "incremental" : "flat"; + str->append(buffer_type); + str->append(STRING_WITH_LEN(", ")); - return rc; -} + const char *join_alg; + switch (get_join_alg()) { + case BNL_JOIN_ALG: + join_alg= "BNL"; + break; + case BNLH_JOIN_ALG: + join_alg= "BNLH"; + break; + case BKA_JOIN_ALG: + join_alg= "BKA"; + break; + case BKAH_JOIN_ALG: + join_alg= "BKAH"; + break; + default: + DBUG_ASSERT(0); + } + str->append(join_alg); + str->append(STRING_WITH_LEN(" join")); + str->append(STRING_WITH_LEN(")")); + } + /* - Finish searching for records that match records from the join buffer + Initialize a hashed join cache SYNOPSIS - end_join_matching_records() - rc return code passed by the join_matching_records function + init() DESCRIPTION - This function perform final actions on searching for all matches for - the records from the join buffer and building all full join extensions - of the records with these matches. - - RETURN - return code rc passed to the function as a parameter + The function initializes the cache structure with a hash table in it. + The hash table will be used to store key values for the records from + the join buffer. + The function allocates memory for the join buffer and for descriptors of + the record fields stored in the buffer. + The function also initializes a hash table for record keys within the join + buffer space. + + NOTES VALUE + The function is supposed to be called by the init methods of the classes + derived from JOIN_CACHE_HASHED. + + RETURN VALUE + 0 initialization with buffer allocations has been succeeded + 1 otherwise */ -enum_nested_loop_state -JOIN_CACHE_BKA::end_join_matching_records(enum_nested_loop_state rc) +int JOIN_CACHE_HASHED::init() { - for (JOIN_TAB *tab=join->join_tab; tab != join_tab ; tab++) - tab->table->status= tab->status; - return rc; -} - - -/* - Get the key built over the next record from BKA join buffer + int rc= 0; + TABLE_REF *ref= &join_tab->ref; - SYNOPSIS - get_next_key() - key pointer to the buffer where the key value is to be placed + DBUG_ENTER("JOIN_CACHE_HASHED::init"); - DESCRIPTION - The function reads key fields from the current record in the join buffer. - and builds the key value out of these fields that will be used to access - the 'join_tab' table. Some of key fields may belong to previous caches. - They are accessed via record references to the record parts stored in the - previous join buffers. The other key fields always are placed right after - the flag fields of the record. - If the key is embedded, which means that its value can be read directly - from the join buffer, then *key is set to the beginning of the key in - this buffer. Otherwise the key is built in the join_tab->ref->key_buff. - The function returns the length of the key if it succeeds ro read it. - If is assumed that the functions starts reading at the position of - the record length which is provided for each records in a BKA cache. - After the key is built the 'pos' value points to the first position after - the current record. - The function returns 0 if the initial position is after the beginning - of the record fields for last record from the join buffer. + hash_table= 0; + key_entries= 0; - RETURN - length of the key value - if the starting value of 'pos' points to - the position before the fields for the last record, - 0 - otherwise. -*/ + key_length= ref->key_length; -uint JOIN_CACHE_BKA::get_next_key(uchar ** key) -{ - uint len; - uint32 rec_len; - uchar *init_pos; - JOIN_CACHE *cache; - - if (pos > last_rec_pos || !records) - return 0; + if ((rc= JOIN_CACHE::init())) + DBUG_RETURN (rc); - /* Any record in a BKA cache is prepended with its length */ - DBUG_ASSERT(with_length); - - /* Read the length of the record */ - rec_len= get_rec_length(pos); - pos+= size_of_rec_len; - init_pos= pos; + /* Take into account a reference to the next record in the key chain */ + pack_length+= get_size_of_rec_offset(); + pack_length_with_blob_ptrs+= get_size_of_rec_offset(); - /* Read a reference to the previous cache if any */ - if (prev_cache) - pos+= prev_cache->get_size_of_rec_offset(); + init_hash_table(); - curr_rec_pos= pos; + rec_fields_offset= get_size_of_rec_offset()+get_size_of_rec_length()+ + (prev_cache ? prev_cache->get_size_of_rec_offset() : 0); - /* Read all flag fields of the record */ - read_flag_fields(); - + data_fields_offset= 0; if (use_emb_key) { - /* An embedded key is taken directly from the join buffer */ - *key= pos; - len= emb_key_length; - } - else - { - /* Read key arguments from previous caches if there are any such fields */ - if (external_key_arg_fields) - { - uchar *rec_ptr= curr_rec_pos; - uint key_arg_count= external_key_arg_fields; - CACHE_FIELD **copy_ptr= blob_ptr-key_arg_count; - for (cache= prev_cache; key_arg_count; cache= cache->prev_cache) - { - uint len= 0; - DBUG_ASSERT(cache); - rec_ptr= cache->get_rec_ref(rec_ptr); - while (!cache->referenced_fields) - { - cache= cache->prev_cache; - DBUG_ASSERT(cache); - rec_ptr= cache->get_rec_ref(rec_ptr); - } - while (key_arg_count && - cache->read_referenced_field(*copy_ptr, rec_ptr, &len)) - { - copy_ptr++; - --key_arg_count; - } - } - } - - /* - Read the other key arguments from the current record. The fields for - these arguments are always first in the sequence of the record's fields. - */ - CACHE_FIELD *copy= field_descr+flag_fields; - CACHE_FIELD *copy_end= copy+local_key_arg_fields; - bool blob_in_rec_buff= blob_data_is_in_rec_buff(curr_rec_pos); + CACHE_FIELD *copy= field_descr; + CACHE_FIELD *copy_end= copy+flag_fields; for ( ; copy < copy_end; copy++) - read_record_field(copy, blob_in_rec_buff); - - /* Build the key over the fields read into the record buffers */ - TABLE_REF *ref= &join_tab->ref; - cp_buffer_from_ref(join->thd, join_tab->table, ref); - *key= ref->key_buff; - len= ref->key_length; - } - - pos= init_pos+rec_len; + data_fields_offset+= copy->length; + } - return len; -} + DBUG_RETURN(rc); +} /* - Initialize a BKA_UNIQUE cache + Initialize the hash table of a hashed join cache SYNOPSIS - init() + init_hash_table() DESCRIPTION - The function initializes the cache structure. It supposed to be called - right after a constructor for the JOIN_CACHE_BKA_UNIQUE. - The function allocates memory for the join buffer and for descriptors of - the record fields stored in the buffer. - The function also estimates the number of hash table entries in the hash - table to be used and initializes this hash table. + The function estimates the number of hash table entries in the hash + table to be used and initializes this hash table within the join buffer + space. - NOTES - The code of this function should have been included into the constructor - code itself. However the new operator for the class JOIN_CACHE_BKA_UNIQUE - would never fail while memory allocation for the join buffer is not - absolutely unlikely to fail. That's why this memory allocation has to be - placed in a separate function that is called in a couple with a cache - constructor. - It is quite natural to put almost all other constructor actions into - this function. - - RETURN - 0 initialization with buffer allocations has been succeeded - 1 otherwise + RETURN VALUE + Currently the function always returns 0; */ -int JOIN_CACHE_BKA_UNIQUE::init() +int JOIN_CACHE_HASHED::init_hash_table() { - int rc= 0; - TABLE_REF *ref= &join_tab->ref; - - DBUG_ENTER("JOIN_CACHE_BKA_UNIQUE::init"); - hash_table= 0; key_entries= 0; - if ((rc= JOIN_CACHE_BKA::init())) - DBUG_RETURN (rc); - - key_length= ref->key_length; - - /* Take into account a reference to the next record in the key chain */ - pack_length+= get_size_of_rec_offset(); - /* Calculate the minimal possible value of size_of_key_ofs greater than 1 */ uint max_size_of_key_ofs= max(2, get_size_of_rec_offset()); for (size_of_key_ofs= 2; @@ -2591,7 +2512,10 @@ int JOIN_CACHE_BKA_UNIQUE::init() size_of_key_ofs + // reference to the next key (use_emb_key ? get_size_of_rec_offset() : key_length); - uint n= buff_size / (pack_length+key_entry_length+size_of_key_ofs); + ulong space_per_rec= avg_record_length + + avg_aux_buffer_incr + + key_entry_length+size_of_key_ofs; + uint n= buff_size / space_per_rec; /* TODO: Make a better estimate for this upper bound of @@ -2601,6 +2525,7 @@ int JOIN_CACHE_BKA_UNIQUE::init() key_entry_length+size_of_key_ofs); hash_entries= (uint) (n / 0.7); + set_if_bigger(hash_entries, 1); if (offset_size(max_n*key_entry_length) <= size_of_key_ofs) @@ -2612,27 +2537,69 @@ int JOIN_CACHE_BKA_UNIQUE::init() cleanup_hash_table(); curr_key_entry= hash_table; - pack_length+= key_entry_length; - pack_length_with_blob_ptrs+= get_size_of_rec_offset() + key_entry_length; + return 0; +} - rec_fields_offset= get_size_of_rec_offset()+get_size_of_rec_length()+ - (prev_cache ? prev_cache->get_size_of_rec_offset() : 0); - data_fields_offset= 0; - if (use_emb_key) - { - CACHE_FIELD *copy= field_descr; - CACHE_FIELD *copy_end= copy+flag_fields; - for ( ; copy < copy_end; copy++) - data_fields_offset+= copy->length; - } +/* + Reallocate the join buffer of a hashed join cache + + SYNOPSIS + realloc_buffer() - DBUG_RETURN(rc); + DESCRITION + The function reallocates the join buffer of the hashed join cache. + After this it initializes a hash table within the buffer space and + resets the join cache for writing. + + NOTES + The function assumes that buff_size contains the new value for the join + buffer size. + + RETURN VALUE + 0 if the buffer has been successfully reallocated + 1 otherwise +*/ + +int JOIN_CACHE_HASHED::realloc_buffer() +{ + int rc; + free(); + rc= test(!(buff= (uchar*) my_malloc(buff_size, MYF(0)))); + init_hash_table(); + reset(TRUE); + return rc; } +/* + Get maximum size of the additional space per record used for record keys + + SYNOPSYS + get_max_key_addon_space_per_record() + + DESCRIPTION + The function returns the size of the space occupied by one key entry + and one hash table entry. + + RETURN VALUE + maximum size of the additional space per record that is used to store + record keys in the hash table +*/ + +uint JOIN_CACHE_HASHED::get_max_key_addon_space_per_record() +{ + ulong len; + TABLE_REF *ref= &join_tab->ref; + len= (use_emb_key ? get_size_of_rec_offset() : ref->key_length) + + size_of_rec_ofs + // size of the key chain header + size_of_rec_ofs + // >= size of the reference to the next key + size_of_rec_ofs; // >= size of hash table entry + return len; +} + /* - Reset the JOIN_CACHE_BKA_UNIQUE buffer for reading/writing + Reset the buffer of a hashed join cache for reading/writing SYNOPSIS reset() @@ -2640,15 +2607,15 @@ int JOIN_CACHE_BKA_UNIQUE::init() DESCRIPTION This implementation of the virtual function reset() resets the join buffer - of the JOIN_CACHE_BKA_UNIQUE class for reading or writing. + of the JOIN_CACHE_HASHED class for reading or writing. Additionally to what the default implementation does this function cleans up the hash table allocated within the buffer. - RETURN + RETURN VALUE none */ -void JOIN_CACHE_BKA_UNIQUE::reset(bool for_writing) +void JOIN_CACHE_HASHED::reset(bool for_writing) { this->JOIN_CACHE::reset(for_writing); if (for_writing && hash_table) @@ -2656,15 +2623,16 @@ void JOIN_CACHE_BKA_UNIQUE::reset(bool for_writing) curr_key_entry= hash_table; } + /* - Add a record into the JOIN_CACHE_BKA_UNIQUE buffer + Add a record into the buffer of a hashed join cache SYNOPSIS put_record() DESCRIPTION This implementation of the virtual function put_record writes the next - matching record into the join buffer of the JOIN_CACHE_BKA_UNIQUE class. + matching record into the join buffer of the JOIN_CACHE_HASHED class. Additionally to what the default implementation does this function performs the following. It extracts from the record the key value used in lookups for matching @@ -2675,14 +2643,16 @@ void JOIN_CACHE_BKA_UNIQUE::reset(bool for_writing) is attached to the key entry. The key value is either placed in the hash element added for the key or, if the use_emb_key flag is set, remains in the record from the partial join. + If the match flag field of a record contains MATCH_IMPOSSIBLE the key is + not created for this record. - RETURN + RETURN VALUE TRUE if it has been decided that it should be the last record in the join buffer, FALSE otherwise */ -bool JOIN_CACHE_BKA_UNIQUE::put_record() +bool JOIN_CACHE_HASHED::put_record() { bool is_full; uchar *key; @@ -2698,6 +2668,9 @@ bool JOIN_CACHE_BKA_UNIQUE::put_record() link= prev_cache->get_curr_rec_link(); write_record_data(link, &is_full); + if (last_written_is_null_compl) + return is_full; + if (use_emb_key) key= get_curr_emb_key(); else @@ -2751,6 +2724,7 @@ bool JOIN_CACHE_BKA_UNIQUE::put_record() memcpy(cp, key, key_len); } last_key_entry= cp; + DBUG_ASSERT(last_key_entry >= end_pos); /* Increment the counter of key_entries in the hash table */ key_entries++; } @@ -2759,7 +2733,7 @@ bool JOIN_CACHE_BKA_UNIQUE::put_record() /* - Read the next record from the JOIN_CACHE_BKA_UNIQUE buffer + Read the next record from the buffer of a hashed join cache SYNOPSIS get_record() @@ -2769,12 +2743,12 @@ bool JOIN_CACHE_BKA_UNIQUE::put_record() function get_record does this implementation skips the link element used to connect the records with the same key into a chain. - RETURN - TRUE - there are no more records to read from the join buffer - FALSE - otherwise + RETURN VALUE + TRUE there are no more records to read from the join buffer + FALSE otherwise */ -bool JOIN_CACHE_BKA_UNIQUE::get_record() +bool JOIN_CACHE_HASHED::get_record() { pos+= get_size_of_rec_offset(); return this->JOIN_CACHE::get_record(); @@ -2782,26 +2756,55 @@ bool JOIN_CACHE_BKA_UNIQUE::get_record() /* - Skip record from the JOIN_CACHE_BKA_UNIQUE join buffer if its match flag is on + Skip record from a hashed join buffer if its match flag is set to MATCH_FOUND SYNOPSIS - skip_record_if_match() + skip_if_matched() DESCRIPTION - This implementation of the virtual function skip_record_if_match does + This implementation of the virtual function skip_if_matched does the same as the default implementation does, but it takes into account the link element used to connect the records with the same key into a chain. - RETURN - TRUE - the match flag is on and the record has been skipped - FALSE - the match flag is off + RETURN VALUE + TRUE the match flag is MATCH_FOUND and the record has been skipped + FALSE otherwise */ -bool JOIN_CACHE_BKA_UNIQUE::skip_record_if_match() +bool JOIN_CACHE_HASHED::skip_if_matched() { uchar *save_pos= pos; pos+= get_size_of_rec_offset(); - if (!this->JOIN_CACHE::skip_record_if_match()) + if (!this->JOIN_CACHE::skip_if_matched()) + { + pos= save_pos; + return FALSE; + } + return TRUE; +} + + +/* + Skip record from a hashed join buffer if its match flag dictates to do so + + SYNOPSIS + skip_if_uneeded_match() + + DESCRIPTION + This implementation of the virtual function skip_if_not_needed_match does + the same as the default implementation does, but it takes into account + the link element used to connect the records with the same key into a chain. + + RETURN VALUE + TRUE the match flag dictates to skip the record + FALSE the match flag is off +*/ + +bool JOIN_CACHE_HASHED::skip_if_not_needed_match() +{ + uchar *save_pos= pos; + pos+= get_size_of_rec_offset(); + if (!this->JOIN_CACHE::skip_if_not_needed_match()) { pos= save_pos; return FALSE; @@ -2830,13 +2833,13 @@ bool JOIN_CACHE_BKA_UNIQUE::skip_record_if_match() Otherwise the function returns the position where the reference to the newly created hash element for the given key is to be added. - RETURN - TRUE - the key is found in the hash table - FALSE - otherwise + RETURN VALUE + TRUE the key is found in the hash table + FALSE otherwise */ -bool JOIN_CACHE_BKA_UNIQUE::key_search(uchar *key, uint key_len, - uchar **key_ref_ptr) +bool JOIN_CACHE_HASHED::key_search(uchar *key, uint key_len, + uchar **key_ref_ptr) { bool is_found= FALSE; uint idx= get_hash_idx(key, key_length); @@ -2871,11 +2874,11 @@ bool JOIN_CACHE_BKA_UNIQUE::key_search(uchar *key, uint key_len, The function calculates an index of the hash entry in the hash table of the join buffer for the given key - RETURN + RETURN VALUE the calculated index of the hash entry for the given key. */ -uint JOIN_CACHE_BKA_UNIQUE::get_hash_idx(uchar* key, uint key_len) +uint JOIN_CACHE_HASHED::get_hash_idx(uchar* key, uint key_len) { ulong nr= 1; ulong nr2= 4; @@ -2902,11 +2905,11 @@ uint JOIN_CACHE_BKA_UNIQUE::get_hash_idx(uchar* key, uint key_len) The function cleans up the hash table in the join buffer removing all hash elements from the table. - RETURN + RETURN VALUE none */ -void JOIN_CACHE_BKA_UNIQUE:: cleanup_hash_table() +void JOIN_CACHE_HASHED:: cleanup_hash_table() { last_key_entry= hash_table; bzero(hash_table, (buff+buff_size)-hash_table); @@ -2915,64 +2918,680 @@ void JOIN_CACHE_BKA_UNIQUE:: cleanup_hash_table() /* - Initialize retrieval of range sequence for BKA_UNIQUE algorithm + Check whether all records in a key chain have their match flags set on + + SYNOPSIS + check_all_match_flags_for_key() + key_chain_ptr + + DESCRIPTION + This function retrieves records in the given circular chain and checks + whether their match flags are set on. The parameter key_chain_ptr shall + point to the position in the join buffer storing the reference to the + last element of this chain. + + RETURN VALUE + TRUE if each retrieved record has its match flag set to MATCH_FOUND + FALSE otherwise +*/ + +bool JOIN_CACHE_HASHED::check_all_match_flags_for_key(uchar *key_chain_ptr) +{ + uchar *last_rec_ref_ptr= get_next_rec_ref(key_chain_ptr); + uchar *next_rec_ref_ptr= last_rec_ref_ptr; + do + { + next_rec_ref_ptr= get_next_rec_ref(next_rec_ref_ptr); + uchar *rec_ptr= next_rec_ref_ptr+rec_fields_offset; + if (get_match_flag_by_pos(rec_ptr) != MATCH_FOUND) + return FALSE; + } + while (next_rec_ref_ptr != last_rec_ref_ptr); + return TRUE; +} + + +/* + Get the next key built for the records from the buffer of a hashed join cache + + SYNOPSIS + get_next_key() + key pointer to the buffer where the key value is to be placed + + DESCRIPTION + The function reads the next key value stored in the hash table of the + join buffer. Depending on the value of the use_emb_key flag of the + join cache the value is read either from the table itself or from + the record field where it occurs. + + RETURN VALUE + length of the key value - if the starting value of 'cur_key_entry' refers + to the position after that referred by the the value of 'last_key_entry', + 0 - otherwise. +*/ + +uint JOIN_CACHE_HASHED::get_next_key(uchar ** key) +{ + if (curr_key_entry == last_key_entry) + return 0; + + curr_key_entry-= key_entry_length; + + *key = use_emb_key ? get_emb_key(curr_key_entry) : curr_key_entry; + + DBUG_ASSERT(*key >= buff && *key < hash_table); + + return key_length; +} + + +/* + Initiate an iteration process over records in the joined table + + SYNOPSIS + open() + + DESCRIPTION + The function initiates the process of iteration over records from the + joined table recurrently performed by the BNL/BKLH join algorithm. + + RETURN VALUE + 0 the initiation is a success + error code otherwise +*/ + +int JOIN_TAB_SCAN::open() +{ + for (JOIN_TAB *tab= join->join_tab; tab != join_tab ; tab++) + { + tab->status= tab->table->status; + tab->table->status= 0; + } + is_first_record= TRUE; + return join_init_read_record(join_tab); +} + + +/* + Read the next record that can match while scanning the joined table + + SYNOPSIS + next() + + DESCRIPTION + The function reads the next record from the joined table that can + match some records in the buffer of the join cache 'cache'. To do + this the function calls the function that scans table records and + looks for the next one that meets the condition pushed to the + joined table join_tab. + + NOTES + The function catches the signal that kills the query. + + RETURN VALUE + 0 the next record exists and has been successfully read + error code otherwise +*/ + +int JOIN_TAB_SCAN::next() +{ + int err= 0; + int skip_rc; + READ_RECORD *info= &join_tab->read_record; + SQL_SELECT *select= join_tab->cache_select; + if (is_first_record) + is_first_record= FALSE; + else + err= info->read_record(info); + if (!err) + update_virtual_fields(join->thd, join_tab->table); + while (!err && select && (skip_rc= select->skip_record(join->thd)) <= 0) + { + if (join->thd->killed || skip_rc < 0) + return 1; + /* + Move to the next record if the last retrieved record does not + meet the condition pushed to the table join_tab. + */ + err= info->read_record(info); + if (!err) + update_virtual_fields(join->thd, join_tab->table); + } + return err; +} + + +/* + Perform finalizing actions for a scan over the table records + + SYNOPSIS + close() + + DESCRIPTION + The function performs the necessary restoring actions after + the table scan over the joined table has been finished. + + RETURN VALUE + none +*/ + +void JOIN_TAB_SCAN::close() +{ + for (JOIN_TAB *tab= join->join_tab; tab != join_tab ; tab++) + tab->table->status= tab->status; +} + + +/* + Prepare to iterate over the BNL join cache buffer to look for matches + + SYNOPSIS + prepare_look_for_matches() + skip_last <-> ignore the last record in the buffer + + DESCRIPTION + The function prepares the join cache for an iteration over the + records in the join buffer. The iteration is performed when looking + for matches for the record from the joined table join_tab that + has been placed into the record buffer of the joined table. + If the value of the parameter skip_last is TRUE then the last + record from the join buffer is ignored. + The function initializes the counter of the records that have been + not iterated over yet. + + RETURN VALUE + TRUE there are no records in the buffer to iterate over + FALSE otherwise +*/ + +bool JOIN_CACHE_BNL::prepare_look_for_matches(bool skip_last) +{ + if (!records) + return TRUE; + reset(FALSE); + rem_records= records-test(skip_last); + return rem_records == 0; +} + + +/* + Get next record from the BNL join cache buffer when looking for matches + + SYNOPSIS + get_next_candidate_for_match + + DESCRIPTION + This method is used for iterations over the records from the join + cache buffer when looking for matches for records from join_tab. + The methods performs the necessary preparations to read the next record + from the join buffer into the record buffer by the method + read_next_candidate_for_match, or, to skip the next record from the join + buffer by the method skip_recurrent_candidate_for_match. + This implementation of the virtual method get_next_candidate_for_match + just decrements the counter of the records that are to be iterated over + and returns the current value of the cursor 'pos' as the position of + the record to be processed. + + RETURN VALUE + pointer to the position right after the prefix of the current record + in the join buffer if the there is another record to iterate over, + 0 - otherwise. +*/ + +uchar *JOIN_CACHE_BNL::get_next_candidate_for_match() +{ + if (!rem_records) + return 0; + rem_records--; + return pos+base_prefix_length; +} + + +/* + Check whether the matching record from the BNL cache is to be skipped + + SYNOPSIS + skip_next_candidate_for_match + rec_ptr pointer to the position in the join buffer right after the prefix + of the current record + + DESCRIPTION + This implementation of the virtual function just calls the + method skip_if_not_needed_match to check whether the record referenced by + ref_ptr has its match flag set either to MATCH_FOUND and join_tab is the + first inner table of a semi-join, or it's set to MATCH_IMPOSSIBLE and + join_tab is the first inner table of an outer join. + If so, the function just skips this record setting the value of the + cursor 'pos' to the position right after it. + + RETURN VALUE + TRUE the record referenced by rec_ptr has been skipped + FALSE otherwise +*/ + +bool JOIN_CACHE_BNL::skip_next_candidate_for_match(uchar *rec_ptr) +{ + pos= rec_ptr-base_prefix_length; + return skip_if_not_needed_match(); +} + + +/* + Read next record from the BNL join cache buffer when looking for matches + + SYNOPSIS + read_next_candidate_for_match + rec_ptr pointer to the position in the join buffer right after the prefix + the current record. + + DESCRIPTION + This implementation of the virtual method read_next_candidate_for_match + calls the method get_record to read the record referenced by rec_ptr from + the join buffer into the record buffer. If this record refers to the + fields in the other join buffers the call of get_record ensures that + these fields are read into the corresponding record buffers as well. + This function is supposed to be called after a successful call of + the method get_next_candidate_for_match. + + RETURN VALUE + none +*/ + +void JOIN_CACHE_BNL::read_next_candidate_for_match(uchar *rec_ptr) +{ + pos= rec_ptr-base_prefix_length; + get_record(); +} + + +/* + Initialize the BNL join cache + + SYNOPSIS + init + + DESCRIPTION + The function initializes the cache structure. It is supposed to be called + right after a constructor for the JOIN_CACHE_BNL. + + NOTES + The function first constructs a companion object of the type JOIN_TAB_SCAN, + then it calls the init method of the parent class. + + RETURN VALUE + 0 initialization with buffer allocations has been succeeded + 1 otherwise +*/ + +int JOIN_CACHE_BNL::init() +{ + DBUG_ENTER("JOIN_CACHE_BNL::init"); + + if (!(join_tab_scan= new JOIN_TAB_SCAN(join, join_tab))) + DBUG_RETURN(1); + + DBUG_RETURN(JOIN_CACHE::init()); +} + + +/* + Get the chain of records from buffer matching the current candidate for join + + SYNOPSIS + get_matching_chain_by_join_key() + + DESCRIPTION + This function first build a join key for the record of join_tab that + currently is in the join buffer for this table. Then it looks for + the key entry with this key in the hash table of the join cache. + If such a key entry is found the function returns the pointer to + the head of the chain of records in the join_buffer that match this + key. + + RETURN VALUE + The pointer to the corresponding circular list of records if + the key entry with the join key is found, 0 - otherwise. +*/ + +uchar *JOIN_CACHE_BNLH::get_matching_chain_by_join_key() +{ + uchar *key_ref_ptr; + TABLE *table= join_tab->table; + TABLE_REF *ref= &join_tab->ref; + KEY *keyinfo= table->key_info+ref->key; + /* Build the join key value out of the record in the record buffer */ + key_copy(ref->key_buff, table->record[0], keyinfo, ref->key_length); + /* Look for this key in the join buffer */ + if (!key_search(ref->key_buff, ref->key_length, &key_ref_ptr)) + return 0; + return key_ref_ptr+get_size_of_key_offset(); +} + + +/* + Prepare to iterate over the BNLH join cache buffer to look for matches + + SYNOPSIS + prepare_look_for_matches() + skip_last <-> ignore the last record in the buffer + + DESCRIPTION + The function prepares the join cache for an iteration over the + records in the join buffer. The iteration is performed when looking + for matches for the record from the joined table join_tab that + has been placed into the record buffer of the joined table. + If the value of the parameter skip_last is TRUE then the last + record from the join buffer is ignored. + The function builds the hashed key from the join fields of join_tab + and uses this key to look in the hash table of the join cache for + the chain of matching records in in the join buffer. If it finds + such a chain it sets the member last_rec_ref_ptr to point to the + last link of the chain while setting the member next_rec_ref_po 0. + + RETURN VALUE + TRUE there are no matching records in the buffer to iterate over + FALSE otherwise +*/ + +bool JOIN_CACHE_BNLH::prepare_look_for_matches(bool skip_last) +{ + uchar *curr_matching_chain; + last_matching_rec_ref_ptr= next_matching_rec_ref_ptr= 0; + if (!(curr_matching_chain= get_matching_chain_by_join_key())) + return 1; + last_matching_rec_ref_ptr= get_next_rec_ref(curr_matching_chain); + return 0; +} + + +/* + Get next record from the BNLH join cache buffer when looking for matches + + SYNOPSIS + get_next_candidate_for_match + + DESCRIPTION + This method is used for iterations over the records from the join + cache buffer when looking for matches for records from join_tab. + The methods performs the necessary preparations to read the next record + from the join buffer into the record buffer by the method + read_next_candidate_for_match, or, to skip the next record from the join + buffer by the method skip_next_candidate_for_match. + This implementation of the virtual method moves to the next record + in the chain of all records from the join buffer that are to be + equi-joined with the current record from join_tab. + + RETURN VALUE + pointer to the beginning of the record fields in the join buffer + if the there is another record to iterate over, 0 - otherwise. +*/ + +uchar *JOIN_CACHE_BNLH::get_next_candidate_for_match() +{ + if (next_matching_rec_ref_ptr == last_matching_rec_ref_ptr) + return 0; + next_matching_rec_ref_ptr= get_next_rec_ref(next_matching_rec_ref_ptr ? + next_matching_rec_ref_ptr : + last_matching_rec_ref_ptr); + return next_matching_rec_ref_ptr+rec_fields_offset; +} + + +/* + Check whether the matching record from the BNLH cache is to be skipped + + SYNOPSIS + skip_next_candidate_for_match + rec_ptr pointer to the position in the join buffer right after + the previous record + + DESCRIPTION + This implementation of the virtual function just calls the + method get_match_flag_by_pos to check whether the record referenced + by ref_ptr has its match flag set to MATCH_FOUND. + + RETURN VALUE + TRUE the record referenced by rec_ptr has its match flag set to + MATCH_FOUND + FALSE otherwise +*/ + +bool JOIN_CACHE_BNLH::skip_next_candidate_for_match(uchar *rec_ptr) +{ + return join_tab->check_only_first_match() && + (get_match_flag_by_pos(rec_ptr) == MATCH_FOUND); +} + + +/* + Read next record from the BNLH join cache buffer when looking for matches + + SYNOPSIS + read_next_candidate_for_match + rec_ptr pointer to the position in the join buffer right after + the previous record + + DESCRIPTION + This implementation of the virtual method read_next_candidate_for_match + calls the method get_record_by_pos to read the record referenced by rec_ptr + from the join buffer into the record buffer. If this record refers to + fields in the other join buffers the call of get_record_by_po ensures that + these fields are read into the corresponding record buffers as well. + This function is supposed to be called after a successful call of + the method get_next_candidate_for_match. + + RETURN VALUE + none +*/ + +void JOIN_CACHE_BNLH::read_next_candidate_for_match(uchar *rec_ptr) +{ + get_record_by_pos(rec_ptr); +} + + +/* + Initialize the BNLH join cache + + SYNOPSIS + init + + DESCRIPTION + The function initializes the cache structure. It is supposed to be called + right after a constructor for the JOIN_CACHE_BNLH. + + NOTES + The function first constructs a companion object of the type JOIN_TAB_SCAN, + then it calls the init method of the parent class. + + RETURN VALUE + 0 initialization with buffer allocations has been succeeded + 1 otherwise +*/ + +int JOIN_CACHE_BNLH::init() +{ + DBUG_ENTER("JOIN_CACHE_BNLH::init"); + + if (!(join_tab_scan= new JOIN_TAB_SCAN(join, join_tab))) + DBUG_RETURN(1); + + DBUG_RETURN(JOIN_CACHE_HASHED::init()); +} + + +/* + Calculate the increment of the MRR buffer for a record write + + SYNOPSIS + aux_buffer_incr() + + DESCRIPTION + This implementation of the virtual function aux_buffer_incr determines + for how much the size of the MRR buffer should be increased when another + record is added to the cache. + + RETURN VALUE + the increment of the size of the MRR buffer for the next record +*/ + +uint JOIN_TAB_SCAN_MRR::aux_buffer_incr(ulong recno) +{ + uint incr= 0; + TABLE_REF *ref= &join_tab->ref; + TABLE *tab= join_tab->table; + uint rec_per_key= tab->key_info[ref->key].rec_per_key[ref->key_parts-1]; + set_if_bigger(rec_per_key, 1); + if (recno == 1) + incr= ref->key_length + tab->file->ref_length; + incr+= tab->file->stats.mrr_length_per_rec * rec_per_key; + return incr; +} + + +/* + Initiate iteration over records returned by MRR for the current join buffer + + SYNOPSIS + open() + + DESCRIPTION + The function initiates the process of iteration over the records from + join_tab returned by the MRR interface functions for records from + the join buffer. Such an iteration is performed by the BKA/BKAH join + algorithm for each new refill of the join buffer. + The function calls the MRR handler function multi_range_read_init to + initiate this process. + + RETURN VALUE + 0 the initiation is a success + error code otherwise +*/ + +int JOIN_TAB_SCAN_MRR::open() +{ + handler *file= join_tab->table->file; + + join_tab->table->null_row= 0; + + + /* Dynamic range access is never used with BKA */ + DBUG_ASSERT(join_tab->use_quick != 2); + + for (JOIN_TAB *tab =join->join_tab; tab != join_tab ; tab++) + { + tab->status= tab->table->status; + tab->table->status= 0; + } + + init_mrr_buff(); + + /* + Prepare to iterate over keys from the join buffer and to get + matching candidates obtained with MMR handler functions. + */ + if (!file->inited) + file->ha_index_init(join_tab->ref.key, 1); + ranges= cache->get_number_of_ranges_for_mrr(); + if (!join_tab->cache_idx_cond) + range_seq_funcs.skip_index_tuple= 0; + return file->multi_range_read_init(&range_seq_funcs, (void*) cache, + ranges, mrr_mode, &mrr_buff); +} + + +/* + Read the next record returned by MRR for the current join buffer + + SYNOPSIS + next() + + DESCRIPTION + The function reads the next record from the joined table join_tab + returned by the MRR handler function multi_range_read_next for + the current refill of the join buffer. The record is read into + the record buffer used for join_tab records in join operations. + + RETURN VALUE + 0 the next record exists and has been successfully read + error code otherwise +*/ + +int JOIN_TAB_SCAN_MRR::next() +{ + char **ptr= (char **) cache->get_curr_association_ptr(); + int rc= join_tab->table->file->multi_range_read_next(ptr) ? -1 : 0; + if (!rc) + { + /* + If a record in in an incremental cache contains no fields then the + association for the last record in cache will be equal to cache->end_pos + */ + DBUG_ASSERT(cache->buff <= (uchar *) (*ptr) && + (uchar *) (*ptr) <= cache->end_pos); + update_virtual_fields(join->thd, join_tab->table); + } + return rc; +} + + +/* + Initialize retrieval of range sequence for BKA join algorithm SYNOPSIS bka_range_seq_init() - init_params pointer to the BKA_INIQUE join cache object - n_ranges the number of ranges obtained - flags combination of HA_MRR_SINGLE_POINT, HA_MRR_FIXED_KEY + init_params pointer to the BKA join cache object + n_ranges the number of ranges obtained + flags combination of MRR flags DESCRIPTION - The function interprets init_param as a pointer to a JOIN_CACHE_BKA_UNIQUE - object. The function prepares for an iteration over the unique join keys - built over the records from the cache join buffer. + The function interprets init_param as a pointer to a JOIN_CACHE_BKA + object. The function prepares for an iteration over the join keys + built for all records from the cache join buffer. NOTE This function are used only as a callback function. - RETURN - init_param value that is to be used as a parameter of - bka_unique_range_seq_next() + RETURN VALUE + init_param value that is to be used as a parameter of bka_range_seq_next() */ static -range_seq_t bka_unique_range_seq_init(void *init_param, uint n_ranges, - uint flags) +range_seq_t bka_range_seq_init(void *init_param, uint n_ranges, uint flags) { - DBUG_ENTER("bka_unique_range_seq_init"); - JOIN_CACHE_BKA_UNIQUE *cache= (JOIN_CACHE_BKA_UNIQUE *) init_param; + DBUG_ENTER("bka_range_seq_init"); + JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) init_param; cache->reset(0); DBUG_RETURN((range_seq_t) init_param); } /* - Get the key over the next record from the join buffer used by BKA_UNIQUE + Get the next range/key over records from the join buffer used by a BKA cache SYNOPSIS - bka_unique_range_seq_next() - seq value returned by bka_unique_range_seq_init() + bka_range_seq_next() + seq the value returned by bka_range_seq_init range OUT reference to the next range DESCRIPTION - The function interprets seq as a pointer to the JOIN_CACHE_BKA_UNIQUE + The function interprets seq as a pointer to a JOIN_CACHE_BKA object. The function returns a pointer to the range descriptor - for the next unique key built over records from the join buffer. + for the key built over the next record from the join buffer. NOTE This function are used only as a callback function. - RETURN - 0 ok, the range structure filled with info about the next key - 1 no more ranges + RETURN VALUE + 0 ok, the range structure filled with info about the next range/key + 1 no more ranges */ static -uint bka_unique_range_seq_next(range_seq_t rseq, KEY_MULTI_RANGE *range) +uint bka_range_seq_next(range_seq_t rseq, KEY_MULTI_RANGE *range) { - DBUG_ENTER("bka_unique_range_seq_next"); - JOIN_CACHE_BKA_UNIQUE *cache= (JOIN_CACHE_BKA_UNIQUE *) rseq; + DBUG_ENTER("bka_range_seq_next"); + JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq; TABLE_REF *ref= &cache->join_tab->ref; key_range *start_key= &range->start_key; if ((start_key->length= cache->get_next_key((uchar **) &start_key->key))) @@ -2981,7 +3600,7 @@ uint bka_unique_range_seq_next(range_seq_t rseq, KEY_MULTI_RANGE *range) start_key->flag= HA_READ_KEY_EXACT; range->end_key= *start_key; range->end_key.flag= HA_READ_AFTER_KEY; - range->ptr= (char *) cache->get_curr_key_chain(); + range->ptr= (char *) cache->get_curr_rec(); range->range_flag= EQ_RANGE; DBUG_RETURN(0); } @@ -2990,305 +3609,652 @@ uint bka_unique_range_seq_next(range_seq_t rseq, KEY_MULTI_RANGE *range) /* - Check whether range_info orders to skip the next record from BKA_UNIQUE buffer + Check whether range_info orders to skip the next record from BKA buffer SYNOPSIS - bka_unique_range_seq_skip_record() - seq value returned by bka_unique_range_seq_init() + bka_range_seq_skip_record() + seq value returned by bka_range_seq_init() range_info information about the next range - rowid [NOT USED] rowid of the record to be checked (not used) + rowid [NOT USED] rowid of the record to be checked + DESCRIPTION - The function interprets seq as a pointer to the JOIN_CACHE_BKA_UNIQUE - object. The function returns TRUE if the record with this range_info - is to be filtered out from the stream of records returned by + The function interprets seq as a pointer to a JOIN_CACHE_BKA object. + The function returns TRUE if the record with this range_info + is to be filtered out from the stream of records returned by multi_range_read_next(). NOTE This function are used only as a callback function. - RETURN + RETURN VALUE 1 record with this range_info is to be filtered out from the stream of records returned by multi_range_read_next() 0 the record is to be left in the stream */ static -bool bka_unique_range_seq_skip_record(range_seq_t rseq, char *range_info, - uchar *rowid) +bool bka_range_seq_skip_record(range_seq_t rseq, char *range_info, uchar *rowid) { - DBUG_ENTER("bka_unique_range_seq_skip_record"); - JOIN_CACHE_BKA_UNIQUE *cache= (JOIN_CACHE_BKA_UNIQUE *) rseq; - bool res= cache->check_all_match_flags_for_key((uchar *) range_info); + DBUG_ENTER("bka_range_seq_skip_record"); + JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq; + bool res= cache->get_match_flag_by_pos((uchar *) range_info) == + JOIN_CACHE::MATCH_FOUND; DBUG_RETURN(res); } - + /* - Check if the record combination matches the index condition + Check if the record combination from BKA cache matches the index condition SYNOPSIS - JOIN_CACHE_BKA_UNIQUE::skip_index_tuple() - rseq Value returned by bka_range_seq_init() - range_info MRR range association data + bka_skip_index_tuple() + rseq value returned by bka_range_seq_init() + range_info record chain for the next range/key returned by MRR DESCRIPTION - See JOIN_CACHE_BKA::skip_index_tuple(). - This function is the variant for use with - JOIN_CACHE_BKA_UNIQUE. The difference from JOIN_CACHE_BKA case is that - there may be multiple previous table record combinations that share the - same key, i.e. they map to the same MRR range. - As a consequence, we need to loop through all previous table record - combinations that match the given MRR range key range_info until we find - one that satisfies the index condition. + This is wrapper for JOIN_CACHE_BKA::skip_index_tuple method, + see comments there. NOTE - Possible optimization: - Before we unpack the record from a previous table - check if this table is used in the condition. - If so then unpack the record otherwise skip the unpacking. - This should be done by a special virtual method - get_partial_record_by_pos(). - - RETURN + This function is used as a RANGE_SEQ_IF::skip_index_tuple callback. + + RETURN VALUE 0 The record combination satisfies the index condition 1 Otherwise - - */ -bool JOIN_CACHE_BKA_UNIQUE::skip_index_tuple(range_seq_t rseq, char *range_info) +static +bool bka_skip_index_tuple(range_seq_t rseq, char *range_info) { - DBUG_ENTER("JOIN_CACHE_BKA_UNIQUE::skip_index_tuple"); - JOIN_CACHE_BKA_UNIQUE *cache= (JOIN_CACHE_BKA_UNIQUE *) rseq; - uchar *last_rec_ref_ptr= cache->get_next_rec_ref((uchar*) range_info); - uchar *next_rec_ref_ptr= last_rec_ref_ptr; - do - { - next_rec_ref_ptr= cache->get_next_rec_ref(next_rec_ref_ptr); - uchar *rec_ptr= next_rec_ref_ptr + cache->rec_fields_offset; - cache->get_record_by_pos(rec_ptr); - if (join_tab->cache_idx_cond->val_int()) - DBUG_RETURN(FALSE); - } while(next_rec_ref_ptr != last_rec_ref_ptr); - DBUG_RETURN(TRUE); + DBUG_ENTER("bka_skip_index_tuple"); + JOIN_CACHE_BKA *cache= (JOIN_CACHE_BKA *) rseq; + DBUG_RETURN(cache->skip_index_tuple(range_info)); } /* - Check if the record combination matches the index condition + Prepare to read the record from BKA cache matching the current joined record SYNOPSIS - bka_unique_skip_index_tuple() - rseq Value returned by bka_range_seq_init() - range_info MRR range association data + prepare_look_for_matches() + skip_last <-> ignore the last record in the buffer (always unused here) + + DESCRIPTION + The function prepares to iterate over records in the join cache buffer + matching the record loaded into the record buffer for join_tab when + performing join operation by BKA join algorithm. With BKA algorithms the + record loaded into the record buffer for join_tab always has a direct + reference to the matching records from the join buffer. When the regular + BKA join algorithm is employed the record from join_tab can refer to + only one such record. + The function sets the counter of the remaining records from the cache + buffer that would match the current join_tab record to 1. + RETURN VALUE + TRUE there are no records in the buffer to iterate over + FALSE otherwise +*/ + +bool JOIN_CACHE_BKA::prepare_look_for_matches(bool skip_last) +{ + if (!records) + return TRUE; + rem_records= 1; + return FALSE; +} + + +/* + Get the record from the BKA cache matching the current joined record + + SYNOPSIS + get_next_candidate_for_match + DESCRIPTION - This is wrapper for JOIN_CACHE_BKA_UNIQUE::skip_index_tuple method, - see comments there. + This method is used for iterations over the records from the join + cache buffer when looking for matches for records from join_tab. + The method performs the necessary preparations to read the next record + from the join buffer into the record buffer by the method + read_next_candidate_for_match, or, to skip the next record from the join + buffer by the method skip_if_not_needed_match. + This implementation of the virtual method get_next_candidate_for_match + just decrements the counter of the records that are to be iterated over + and returns the value of curr_association as a reference to the position + of the beginning of the record fields in the buffer. + + RETURN VALUE + pointer to the start of the record fields in the join buffer + if the there is another record to iterate over, 0 - otherwise. +*/ - NOTE - This function is used as a RANGE_SEQ_IF::skip_index_tuple callback. - - RETURN - 0 The record combination satisfies the index condition - 1 Otherwise +uchar *JOIN_CACHE_BKA::get_next_candidate_for_match() +{ + if (!rem_records) + return 0; + rem_records--; + return curr_association; +} + + +/* + Check whether the matching record from the BKA cache is to be skipped + + SYNOPSIS + skip_next_candidate_for_match + rec_ptr pointer to the position in the join buffer right after + the previous record + + DESCRIPTION + This implementation of the virtual function just calls the + method get_match_flag_by_pos to check whether the record referenced + by ref_ptr has its match flag set to MATCH_FOUND. + + RETURN VALUE + TRUE the record referenced by rec_ptr has its match flag set to + MATCH_FOUND + FALSE otherwise */ -static -bool bka_unique_skip_index_tuple(range_seq_t rseq, char *range_info) +bool JOIN_CACHE_BKA::skip_next_candidate_for_match(uchar *rec_ptr) { - DBUG_ENTER("bka_unique_skip_index_tuple"); - JOIN_CACHE_BKA_UNIQUE *cache= (JOIN_CACHE_BKA_UNIQUE *) rseq; - DBUG_RETURN(cache->skip_index_tuple(rseq, range_info)); + return join_tab->check_only_first_match() && + (get_match_flag_by_pos(rec_ptr) == MATCH_FOUND); } /* - Using BKA_UNIQUE find matches from the next table for records from join buffer + Read the next record from the BKA join cache buffer when looking for matches SYNOPSIS - join_matching_records() - skip_last do not look for matches for the last partial join record + read_next_candidate_for_match + rec_ptr pointer to the position in the join buffer right after + the previous record DESCRIPTION - This function can be used only when the table join_tab can be accessed - by keys built over the fields of previous join tables. - The function retrieves all keys from the hash table of the join buffer - built for partial join records from the buffer. For each of these keys - the function performs an index lookup and tries to match records yielded - by this lookup with records from the join buffer attached to the key. - If a match is found the function will call the sub_select function trying - to look for matches for the remaining join operations. - This function does not assume that matching records are necessarily - returned with references to the keys by which they were found. If the call - of the function multi_range_read_init returns flags with - HA_MRR_NO_ASSOCIATION then a search for the key built from the returned - record is carried on. The search is performed by probing in in the hash - table of the join buffer. - This function currently is called only from the function join_records. - It's assumed that this function is always called with the skip_last - parameter equal to false. - - RETURN - return one of enum_nested_loop_state + This implementation of the virtual method read_next_candidate_for_match + calls the method get_record_by_pos to read the record referenced by rec_ptr + from the join buffer into the record buffer. If this record refers to + fields in the other join buffers the call of get_record_by_po ensures that + these fields are read into the corresponding record buffers as well. + This function is supposed to be called after a successful call of + the method get_next_candidate_for_match. + + RETURN VALUE + none */ -enum_nested_loop_state -JOIN_CACHE_BKA_UNIQUE::join_matching_records(bool skip_last) +void JOIN_CACHE_BKA::read_next_candidate_for_match(uchar *rec_ptr) +{ + get_record_by_pos(rec_ptr); +} + + +/* + Initialize the BKA join cache + + SYNOPSIS + init + + DESCRIPTION + The function initializes the cache structure. It is supposed to be called + right after a constructor for the JOIN_CACHE_BKA. + + NOTES + The function first constructs a companion object of the type + JOIN_TAB_SCAN_MRR, then it calls the init method of the parent class. + + RETURN VALUE + 0 initialization with buffer allocations has been succeeded + 1 otherwise +*/ + +int JOIN_CACHE_BKA::init() { - int error; - uchar *key_chain_ptr; - handler *file= join_tab->table->file; - enum_nested_loop_state rc= NESTED_LOOP_OK; bool check_only_first_match= join_tab->check_only_first_match(); - bool no_association= test(mrr_mode & HA_MRR_NO_ASSOCIATION); - /* Set functions to iterate over keys in the join buffer */ - RANGE_SEQ_IF seq_funcs= { bka_unique_range_seq_init, - bka_unique_range_seq_next, - check_only_first_match && !no_association ? - bka_unique_range_seq_skip_record : 0, - join_tab->cache_idx_cond ? - bka_unique_skip_index_tuple : 0 }; + RANGE_SEQ_IF rs_funcs= { bka_range_seq_init, + bka_range_seq_next, + check_only_first_match ? + bka_range_seq_skip_record : 0, + bka_skip_index_tuple }; - /* The value of skip_last must be always FALSE when this function is called */ - DBUG_ASSERT(!skip_last); + DBUG_ENTER("JOIN_CACHE_BKA::init"); - /* Return at once if there are no records in the join buffer */ - if (!records) - return NESTED_LOOP_OK; - - rc= init_join_matching_records(&seq_funcs, key_entries); - if (rc != NESTED_LOOP_OK) - goto finish; + if (!(join_tab_scan= new JOIN_TAB_SCAN_MRR(join, join_tab, + mrr_mode, rs_funcs))) + DBUG_RETURN(1); - while (!(error= file->multi_range_read_next((char **) &key_chain_ptr))) - { - if (no_association) - { - uchar *key_ref_ptr; - TABLE *table= join_tab->table; - TABLE_REF *ref= &join_tab->ref; - KEY *keyinfo= table->key_info+ref->key; - /* - Build the key value out of the record returned by the call of - multi_range_read_next in the record buffer - */ - key_copy(ref->key_buff, table->record[0], keyinfo, ref->key_length); - /* Look for this key in the join buffer */ - if (!key_search(ref->key_buff, ref->key_length, &key_ref_ptr)) - continue; - key_chain_ptr= key_ref_ptr+get_size_of_key_offset(); - } + DBUG_RETURN(JOIN_CACHE::init()); +} - uchar *last_rec_ref_ptr= get_next_rec_ref(key_chain_ptr); - uchar *next_rec_ref_ptr= last_rec_ref_ptr; - do - { - next_rec_ref_ptr= get_next_rec_ref(next_rec_ref_ptr); - uchar *rec_ptr= next_rec_ref_ptr+rec_fields_offset; - if (join->thd->killed) - { - /* The user has aborted the execution of the query */ - join->thd->send_kill_message(); - rc= NESTED_LOOP_KILLED; - goto finish; - } - /* - If only the first match is needed and it has been already found - for the associated partial join record then the returned candidate - is discarded. - */ - if (rc == NESTED_LOOP_OK && - (!check_only_first_match || !get_match_flag_by_pos(rec_ptr))) - { - get_record_by_pos(rec_ptr); - update_virtual_fields(join->thd, join_tab->table); - rc= generate_full_extensions(rec_ptr); - if (rc != NESTED_LOOP_OK && rc != NESTED_LOOP_NO_MORE_ROWS) - goto finish; +/* + Get the key built over the next record from BKA join buffer + + SYNOPSIS + get_next_key() + key pointer to the buffer where the key value is to be placed + + DESCRIPTION + The function reads key fields from the current record in the join buffer. + and builds the key value out of these fields that will be used to access + the 'join_tab' table. Some of key fields may belong to previous caches. + They are accessed via record references to the record parts stored in the + previous join buffers. The other key fields always are placed right after + the flag fields of the record. + If the key is embedded, which means that its value can be read directly + from the join buffer, then *key is set to the beginning of the key in + this buffer. Otherwise the key is built in the join_tab->ref->key_buff. + The function returns the length of the key if it succeeds ro read it. + If is assumed that the functions starts reading at the position of + the record length which is provided for each records in a BKA cache. + After the key is built the 'pos' value points to the first position after + the current record. + The function just skips the records with MATCH_IMPOSSIBLE in the + match flag field if there is any. + The function returns 0 if the initial position is after the beginning + of the record fields for last record from the join buffer. + + RETURN VALUE + length of the key value - if the starting value of 'pos' points to + the position before the fields for the last record, + 0 - otherwise. +*/ + +uint JOIN_CACHE_BKA::get_next_key(uchar ** key) +{ + uint len; + uint32 rec_len; + uchar *init_pos; + JOIN_CACHE *cache; + +start: + + /* Any record in a BKA cache is prepended with its length */ + DBUG_ASSERT(with_length); + + if ((pos+size_of_rec_len) > last_rec_pos || !records) + return 0; + + /* Read the length of the record */ + rec_len= get_rec_length(pos); + pos+= size_of_rec_len; + init_pos= pos; + + /* Read a reference to the previous cache if any */ + if (prev_cache) + pos+= prev_cache->get_size_of_rec_offset(); + + curr_rec_pos= pos; + + /* Read all flag fields of the record */ + read_flag_fields(); + + if (with_match_flag && + (Match_flag) curr_rec_pos[0] == MATCH_IMPOSSIBLE ) + { + pos= init_pos+rec_len; + goto start; + } + + if (use_emb_key) + { + /* An embedded key is taken directly from the join buffer */ + *key= pos; + len= emb_key_length; + } + else + { + /* Read key arguments from previous caches if there are any such fields */ + if (external_key_arg_fields) + { + uchar *rec_ptr= curr_rec_pos; + uint key_arg_count= external_key_arg_fields; + CACHE_FIELD **copy_ptr= blob_ptr-key_arg_count; + for (cache= prev_cache; key_arg_count; cache= cache->prev_cache) + { + uint len= 0; + DBUG_ASSERT(cache); + rec_ptr= cache->get_rec_ref(rec_ptr); + while (!cache->referenced_fields) + { + cache= cache->prev_cache; + DBUG_ASSERT(cache); + rec_ptr= cache->get_rec_ref(rec_ptr); + } + while (key_arg_count && + cache->read_referenced_field(*copy_ptr, rec_ptr, &len)) + { + copy_ptr++; + --key_arg_count; + } } } - while (next_rec_ref_ptr != last_rec_ref_ptr); + + /* + Read the other key arguments from the current record. The fields for + these arguments are always first in the sequence of the record's fields. + */ + CACHE_FIELD *copy= field_descr+flag_fields; + CACHE_FIELD *copy_end= copy+local_key_arg_fields; + bool blob_in_rec_buff= blob_data_is_in_rec_buff(curr_rec_pos); + for ( ; copy < copy_end; copy++) + read_record_field(copy, blob_in_rec_buff); + + /* Build the key over the fields read into the record buffers */ + TABLE_REF *ref= &join_tab->ref; + cp_buffer_from_ref(join->thd, join_tab->table, ref); + *key= ref->key_buff; + len= ref->key_length; } - if (error > 0 && error != HA_ERR_END_OF_FILE) - return NESTED_LOOP_ERROR; -finish: - return end_join_matching_records(rc); + pos= init_pos+rec_len; + + return len; +} + + +/* + Check the index condition of the joined table for a record from the BKA cache + + SYNOPSIS + skip_index_tuple() + range_info pointer to the record returned by MRR + + DESCRIPTION + This function is invoked from MRR implementation to check if an index + tuple matches the index condition. It is used in the case where the index + condition actually depends on both columns of the used index and columns + from previous tables. + + NOTES + Accessing columns of the previous tables requires special handling with + BKA. The idea of BKA is to collect record combinations in a buffer and + then do a batch of ref access lookups, i.e. by the time we're doing a + lookup its previous-records-combination is not in prev_table->record[0] + but somewhere in the join buffer. + We need to get it from there back into prev_table(s)->record[0] before we + can evaluate the index condition, and that's why we need this function + instead of regular IndexConditionPushdown. + + NOTES + Possible optimization: + Before we unpack the record from a previous table + check if this table is used in the condition. + If so then unpack the record otherwise skip the unpacking. + This should be done by a special virtual method + get_partial_record_by_pos(). + + RETURN VALUE + 1 the record combination does not satisfies the index condition + 0 otherwise +*/ + +bool JOIN_CACHE_BKA::skip_index_tuple(char *range_info) +{ + DBUG_ENTER("JOIN_CACHE_BKA::skip_index_tuple"); + get_record_by_pos((uchar*)range_info); + DBUG_RETURN(!join_tab->cache_idx_cond->val_int()); } + /* - Check whether all records in a key chain have their match flags set on + Initialize retrieval of range sequence for the BKAH join algorithm + + SYNOPSIS + bkah_range_seq_init() + init_params pointer to the BKAH join cache object + n_ranges the number of ranges obtained + flags combination of MRR flags + + DESCRIPTION + The function interprets init_param as a pointer to a JOIN_CACHE_BKAH + object. The function prepares for an iteration over distinct join keys + built over the records from the cache join buffer. + + NOTE + This function are used only as a callback function. + RETURN VALUE + init_param value that is to be used as a parameter of + bkah_range_seq_next() +*/ + +static +range_seq_t bkah_range_seq_init(void *init_param, uint n_ranges, uint flags) +{ + DBUG_ENTER("bkah_range_seq_init"); + JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) init_param; + cache->reset(0); + DBUG_RETURN((range_seq_t) init_param); +} + + +/* + Get the next range/key over records from the join buffer of a BKAH cache + SYNOPSIS - check_all_match_flags_for_key() - key_chain_ptr + bkah_range_seq_next() + seq value returned by bkah_range_seq_init() + range OUT reference to the next range + + DESCRIPTION + The function interprets seq as a pointer to a JOIN_CACHE_BKAH + object. The function returns a pointer to the range descriptor + for the next unique key built over records from the join buffer. + + NOTE + This function are used only as a callback function. + + RETURN VALUE + 0 ok, the range structure filled with info about the next range/key + 1 no more ranges +*/ + +static +uint bkah_range_seq_next(range_seq_t rseq, KEY_MULTI_RANGE *range) +{ + DBUG_ENTER("bkah_range_seq_next"); + JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) rseq; + TABLE_REF *ref= &cache->join_tab->ref; + key_range *start_key= &range->start_key; + if ((start_key->length= cache->get_next_key((uchar **) &start_key->key))) + { + start_key->keypart_map= (1 << ref->key_parts) - 1; + start_key->flag= HA_READ_KEY_EXACT; + range->end_key= *start_key; + range->end_key.flag= HA_READ_AFTER_KEY; + range->ptr= (char *) cache->get_curr_key_chain(); + range->range_flag= EQ_RANGE; + DBUG_RETURN(0); + } + DBUG_RETURN(1); +} + +/* + Check whether range_info orders to skip the next record from BKAH join buffer + + SYNOPSIS + bkah_range_seq_skip_record() + seq value returned by bkah_range_seq_init() + range_info information about the next range/key returned by MRR + rowid [NOT USED] rowid of the record to be checked (not used) + DESCRIPTION - This function retrieves records in the given circular chain and checks - whether their match flags are set on. The parameter key_chain_ptr shall - point to the position in the join buffer storing the reference to the - last element of this chain. - - RETURN - TRUE if each retrieved record has its match flag set on - FALSE otherwise + The function interprets seq as a pointer to a JOIN_CACHE_BKAH + object. The function returns TRUE if the record with this range_info + is to be filtered out from the stream of records returned by + multi_range_read_next(). + + NOTE + This function are used only as a callback function. + + RETURN VALUE + 1 record with this range_info is to be filtered out from the stream + of records returned by multi_range_read_next() + 0 the record is to be left in the stream +*/ + +static +bool bkah_range_seq_skip_record(range_seq_t rseq, char *range_info, + uchar *rowid) +{ + DBUG_ENTER("bkah_range_seq_skip_record"); + JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) rseq; + bool res= cache->check_all_match_flags_for_key((uchar *) range_info); + DBUG_RETURN(res); +} + + +/* + Check if the record combination from BKAH cache matches the index condition + + SYNOPSIS + bkah_skip_index_tuple() + rseq value returned by bka_range_seq_init() + range_info record chain for the next range/key returned by MRR + + DESCRIPTION + This is wrapper for JOIN_CACHE_BKA_UNIQUE::skip_index_tuple method, + see comments there. + + NOTE + This function is used as a RANGE_SEQ_IF::skip_index_tuple callback. + + RETURN VALUE + 0 some records from the chain satisfy the index condition + 1 otherwise */ -bool JOIN_CACHE_BKA_UNIQUE::check_all_match_flags_for_key(uchar *key_chain_ptr) +static +bool bkah_skip_index_tuple(range_seq_t rseq, char *range_info) { - uchar *last_rec_ref_ptr= get_next_rec_ref(key_chain_ptr); - uchar *next_rec_ref_ptr= last_rec_ref_ptr; - do - { - next_rec_ref_ptr= get_next_rec_ref(next_rec_ref_ptr); - uchar *rec_ptr= next_rec_ref_ptr+rec_fields_offset; - if (!get_match_flag_by_pos(rec_ptr)) - return FALSE; - } - while (next_rec_ref_ptr != last_rec_ref_ptr); - return TRUE; + DBUG_ENTER("bka_unique_skip_index_tuple"); + JOIN_CACHE_BKAH *cache= (JOIN_CACHE_BKAH *) rseq; + DBUG_RETURN(cache->skip_index_tuple(range_info)); } - -/* - Get the next key built for the records from BKA_UNIQUE join buffer + +/* + Prepare to read record from BKAH cache matching the current joined record SYNOPSIS - get_next_key() - key pointer to the buffer where the key value is to be placed + prepare_look_for_matches() + skip_last <-> ignore the last record in the buffer (always unused here) DESCRIPTION - The function reads the next key value stored in the hash table of the - join buffer. Depending on the value of the use_emb_key flag of the - join cache the value is read either from the table itself or from - the record field where it occurs. + The function prepares to iterate over records in the join cache buffer + matching the record loaded into the record buffer for join_tab when + performing join operation by BKAH join algorithm. With BKAH algorithm, if + association labels are used, then record loaded into the record buffer + for join_tab always has a direct reference to the chain of the mathing + records from the join buffer. If association labels are not used then + then the chain of the matching records is obtained by the call of the + get_key_chain_by_join_key function. + + RETURN VALUE + TRUE there are no records in the buffer to iterate over + FALSE otherwise +*/ + +bool JOIN_CACHE_BKAH::prepare_look_for_matches(bool skip_last) +{ + last_matching_rec_ref_ptr= next_matching_rec_ref_ptr= 0; + if (no_association && + (curr_matching_chain= get_matching_chain_by_join_key())) + return 1; + last_matching_rec_ref_ptr= get_next_rec_ref(curr_matching_chain); + return 0; +} - RETURN - length of the key value - if the starting value of 'cur_key_entry' refers - to the position after that referred by the the value of 'last_key_entry' - 0 - otherwise. +/* + Initialize the BKAH join cache + + SYNOPSIS + init + + DESCRIPTION + The function initializes the cache structure. It is supposed to be called + right after a constructor for the JOIN_CACHE_BKAH. + + NOTES + The function first constructs a companion object of the type + JOIN_TAB_SCAN_MRR, then it calls the init method of the parent class. + + RETURN VALUE + 0 initialization with buffer allocations has been succeeded + 1 otherwise */ -uint JOIN_CACHE_BKA_UNIQUE::get_next_key(uchar ** key) -{ - if (curr_key_entry == last_key_entry) - return 0; +int JOIN_CACHE_BKAH::init() +{ + bool check_only_first_match= join_tab->check_only_first_match(); - curr_key_entry-= key_entry_length; + no_association= test(mrr_mode & HA_MRR_NO_ASSOCIATION); - *key = use_emb_key ? get_emb_key(curr_key_entry) : curr_key_entry; + RANGE_SEQ_IF rs_funcs= { bkah_range_seq_init, + bkah_range_seq_next, + check_only_first_match && !no_association ? + bkah_range_seq_skip_record : 0, + bkah_skip_index_tuple }; - DBUG_ASSERT(*key >= buff && *key < hash_table); + DBUG_ENTER("JOIN_CACHE_BKAH::init"); - return key_length; + if (!(join_tab_scan= new JOIN_TAB_SCAN_MRR(join, join_tab, + mrr_mode, rs_funcs))) + DBUG_RETURN(1); + + DBUG_RETURN(JOIN_CACHE_HASHED::init()); } -/**************************************************************************** - * Join cache module end - ****************************************************************************/ +/* + Check the index condition of the joined table for a record from the BKA cache + + SYNOPSIS + skip_index_tuple() + range_info record chain returned by MRR + + DESCRIPTION + See JOIN_CACHE_BKA::skip_index_tuple(). + This function is the variant for use with rhe class JOIN_CACHE_BKAH. + The difference from JOIN_CACHE_BKA case is that there may be multiple + previous table record combinations that share the same key(MRR range). + As a consequence, we need to loop through the chain of all table record + combinations that match the given MRR range key range_info until we find + one that satisfies the index condition. + + NOTE + Possible optimization: + Before we unpack the record from a previous table + check if this table is used in the condition. + If so then unpack the record otherwise skip the unpacking. + This should be done by a special virtual method + get_partial_record_by_pos(). + + RETURN VALUE + 1 any record combination from the chain referred by range_info + does not satisfy the index condition + 0 otherwise + + +*/ + +bool JOIN_CACHE_BKAH::skip_index_tuple(char *range_info) +{ + uchar *last_rec_ref_ptr= get_next_rec_ref((uchar*) range_info); + uchar *next_rec_ref_ptr= last_rec_ref_ptr; + DBUG_ENTER("JOIN_CACHE_BKAH::skip_index_tuple"); + do + { + next_rec_ref_ptr= get_next_rec_ref(next_rec_ref_ptr); + uchar *rec_ptr= next_rec_ref_ptr + rec_fields_offset; + get_record_by_pos(rec_ptr); + if (join_tab->cache_idx_cond->val_int()) + DBUG_RETURN(FALSE); + } while(next_rec_ref_ptr != last_rec_ref_ptr); + DBUG_RETURN(TRUE); +} diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 76e7f1914f9..69c4ae12470 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -100,6 +100,7 @@ static void make_outerjoin_info(JOIN *join); static Item* make_cond_after_sjm(Item *root_cond, Item *cond, table_map tables, table_map sjm_tables); static bool make_join_select(JOIN *join,SQL_SELECT *select,COND *item); +static void revise_cache_usage(JOIN_TAB *join_tab); static bool make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after); static bool only_eq_ref_tables(JOIN *join, ORDER *order, table_map tables); static void update_depend_map(JOIN *join); @@ -1631,6 +1632,62 @@ void JOIN::restore_tmp() } +/* + Shrink join buffers used for preceding tables to reduce the occupied space + + SYNOPSIS + shrink_join_buffers() + jt table up to which the buffers are to be shrunk + curr_space the size of the space used by the buffers for tables 1..jt + needed_space the size of the space that has to be used by these buffers + + DESCRIPTION + The function makes an attempt to shrink all join buffers used for the + tables starting from the first up to jt to reduce the total size of the + space occupied by the buffers used for tables 1,...,jt from curr_space + to needed_space. + The function assumes that the buffer for the table jt has not been + allocated yet. + + RETURN + FALSE if all buffer have been successfully shrunk + TRUE otherwise +*/ + +bool JOIN::shrink_join_buffers(JOIN_TAB *jt, + ulonglong curr_space, + ulonglong needed_space) +{ + JOIN_CACHE *cache; + for (JOIN_TAB *tab= join_tab+const_tables; tab < jt; tab++) + { + cache= tab->cache; + if (cache) + { + ulong buff_size; + if (needed_space < cache->get_min_join_buffer_size()) + return TRUE; + if (cache->shrink_join_buffer_in_ratio(curr_space, needed_space)) + { + revise_cache_usage(tab); + return TRUE; + } + buff_size= cache->get_join_buffer_size(); + curr_space-= buff_size; + needed_space-= buff_size; + } + } + + cache= jt->cache; + DBUG_ASSERT(cache); + if (needed_space < cache->get_min_join_buffer_size()) + return TRUE; + cache->set_join_buffer_size(needed_space); + + return FALSE; +} + + int JOIN::reinit() { @@ -4601,7 +4658,8 @@ best_access_path(JOIN *join, if (table->covering_keys.is_set(key)) { /* we can use only index tree */ - tmp= record_count * table->file->keyread_read_time(key, 1, tmp); + tmp= record_count * + table->file->keyread_read_time(key, 1, (ha_rows) tmp); } else tmp= record_count*min(tmp,s->worst_seeks); @@ -4766,7 +4824,8 @@ best_access_path(JOIN *join, if (table->covering_keys.is_set(key)) { /* we can use only index tree */ - tmp= record_count * table->file->keyread_read_time(key, 1, tmp); + tmp= record_count * + table->file->keyread_read_time(key, 1, (ha_rows) tmp); } else tmp= record_count * min(tmp,s->worst_seeks); @@ -5832,15 +5891,15 @@ find_best(JOIN *join,table_map rest_tables,uint idx,double record_count, Find how much space the prevous read not const tables takes in cache. */ -void calc_used_field_length(THD *thd, JOIN_TAB *join_tab) +void JOIN_TAB::calc_used_field_length(bool max_fl) { uint null_fields,blobs,fields,rec_length; Field **f_ptr,*field; uint uneven_bit_fields; - MY_BITMAP *read_set= join_tab->table->read_set; + MY_BITMAP *read_set= table->read_set; uneven_bit_fields= null_fields= blobs= fields= rec_length=0; - for (f_ptr=join_tab->table->field ; (field= *f_ptr) ; f_ptr++) + for (f_ptr=table->field ; (field= *f_ptr) ; f_ptr++) { if (bitmap_is_set(read_set, field->field_index)) { @@ -5857,24 +5916,31 @@ void calc_used_field_length(THD *thd, JOIN_TAB *join_tab) } } if (null_fields || uneven_bit_fields) - rec_length+=(join_tab->table->s->null_fields+7)/8; - if (join_tab->table->maybe_null) + rec_length+=(table->s->null_fields+7)/8; + if (table->maybe_null) rec_length+=sizeof(my_bool); - if (blobs) + if (max_fl) { - uint blob_length=(uint) (join_tab->table->file->stats.mean_rec_length- - (join_tab->table->s->reclength-rec_length)); - rec_length+=(uint) max(4,blob_length); - } + // TODO: to improve this estimate for max expected length if the record + if (blobs) + { + uint blob_length=(uint) (table->file->stats.mean_rec_length- + (table->s->reclength-rec_length)); + rec_length+=(uint) max(4,blob_length); + } + } + else + rec_length= table->file->stats.mean_rec_length; + /* psergey-todo: why we don't count here rowid that we might need to store when using DuplicateElimination? */ - join_tab->used_fields=fields; - join_tab->used_fieldlength=rec_length; - join_tab->used_blobs=blobs; - join_tab->used_null_fields= null_fields; - join_tab->used_uneven_bit_fields= uneven_bit_fields; + used_fields=fields; + used_fieldlength=rec_length; + used_blobs=blobs; + used_null_fields= null_fields; + used_uneven_bit_fields= uneven_bit_fields; } @@ -5883,16 +5949,13 @@ cache_record_length(JOIN *join,uint idx) { uint length=0; JOIN_TAB **pos,**end; - THD *thd=join->thd; for (pos=join->best_ref+join->const_tables,end=join->best_ref+idx ; pos != end ; pos++) { JOIN_TAB *join_tab= *pos; - if (!join_tab->used_fieldlength) /* Not calced yet */ - calc_used_field_length(thd, join_tab); - length+=join_tab->used_fieldlength; + length+= join_tab->get_used_fieldlength(); } return length; } @@ -6362,6 +6425,8 @@ inline void add_cond_and_fix(Item **e1, Item *e2) { if (*e1) { + if (!e2) + return; Item *res; if ((res= new Item_cond_and(*e1, e2))) { @@ -6432,9 +6497,8 @@ static void add_not_null_conds(JOIN *join) for (uint i=join->const_tables ; i < join->tables ; i++) { JOIN_TAB *tab=join->join_tab+i; - if ((tab->type == JT_REF || tab->type == JT_EQ_REF || - tab->type == JT_REF_OR_NULL) && - !tab->table->maybe_null) + if (tab->type == JT_REF || tab->type == JT_EQ_REF || + tab->type == JT_REF_OR_NULL) { for (uint keypart= 0; keypart < tab->ref.key_parts; keypart++) { @@ -6466,9 +6530,14 @@ static void add_not_null_conds(JOIN *join) DBUG_EXECUTE("where",print_where(notnull, referred_tab->table->alias, QT_ORDINARY);); - COND *new_cond= referred_tab->select_cond; - add_cond_and_fix(&new_cond, notnull); - referred_tab->set_select_cond(new_cond, __LINE__); + if (!tab->first_inner) + { + COND *new_cond= referred_tab->select_cond; + add_cond_and_fix(&new_cond, notnull); + referred_tab->set_select_cond(new_cond, __LINE__); + } + else + add_cond_and_fix(tab->first_inner->on_expr_ref, notnull); } } } @@ -6648,6 +6717,10 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) make_cond_for_table(cond, join->const_table_map, (table_map) 0, TRUE); + /* Add conditions added by add_not_null_conds(). */ + for (uint i= 0 ; i < join->const_tables ; i++) + add_cond_and_fix(&const_cond, join->join_tab[i].select_cond); + DBUG_EXECUTE("where",print_where(const_cond,"constants", QT_ORDINARY);); for (JOIN_TAB *tab= join->join_tab+join->const_tables; tab < join->join_tab+join->tables ; tab++) @@ -6746,6 +6819,9 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) tmp= NULL; if (cond) tmp= make_cond_for_table(cond, used_tables, current_map, FALSE); + /* Add conditions added by add_not_null_conds(). */ + if (tab->select_cond) + add_cond_and_fix(&tmp, tab->select_cond); if (cond && !tmp && tab->quick) { // Outer join if (tab->type != JT_ALL) @@ -6996,9 +7072,13 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) used_tables2|= current_map; COND *tmp_cond= make_cond_for_table(on_expr, used_tables2, current_map, FALSE); + add_cond_and_fix(&tmp_cond, tab->on_precond); if (tmp_cond) { JOIN_TAB *cond_tab= tab < first_inner_tab ? first_inner_tab : tab; + Item **sel_cond_ref= tab < first_inner_tab ? + &first_inner_tab->on_precond : + &tab->select_cond; /* First add the guards for match variables of all embedding outer join operations. @@ -7021,15 +7101,15 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) tmp_cond->quick_fix_field(); /* Add the predicate to other pushed down predicates */ DBUG_PRINT("info", ("Item_cond_and")); - cond_tab->select_cond= !cond_tab->select_cond ? tmp_cond : - new Item_cond_and(cond_tab->select_cond, - tmp_cond); + *sel_cond_ref= !(*sel_cond_ref) ? + tmp_cond : + new Item_cond_and(*sel_cond_ref, tmp_cond); DBUG_PRINT("info", ("Item_cond_and 0x%lx", - (ulong)cond_tab->select_cond)); - if (!cond_tab->select_cond) - DBUG_RETURN(1); - cond_tab->select_cond->quick_fix_field(); - cond_tab->select_cond->update_used_tables(); + (ulong)(*sel_cond_ref))); + if (!(*sel_cond_ref)) + DBUG_RETURN(1); + (*sel_cond_ref)->quick_fix_field(); + (*sel_cond_ref)->update_used_tables(); if (cond_tab->select) cond_tab->select->cond= cond_tab->select_cond; } @@ -7121,6 +7201,19 @@ void set_join_cache_denial(JOIN_TAB *join_tab) { if (join_tab->cache) { + /* + If there is a previous cache linked to this cache through the + next_cache pointer: remove the link. + */ + if (join_tab->cache->prev_cache) + join_tab->cache->prev_cache->next_cache= 0; + /* + No need to do the same for next_cache since cache denial is done + backwards starting from the latest cache in the linked list (see + revise_cache_usage()). + */ + DBUG_ASSERT(!join_tab->cache->next_cache); + join_tab->cache->free(); join_tab->cache= 0; } @@ -7315,6 +7408,8 @@ end_sj_materialize(JOIN *join, JOIN_TAB *join_tab, bool end_of_records) no_jbuf_after don't use join buffering after table with this number icp_other_tables_ok OUT TRUE if condition pushdown supports other tables presence + idx_cond_fact_out OUT TRUE if condition pushed to the index is factored + out of the condition pushed to the table DESCRIPTION The function finds out whether the table 'tab' can be joined using a join @@ -7326,24 +7421,66 @@ end_sj_materialize(JOIN *join, JOIN_TAB *join_tab, bool end_of_records) depend on: - the access method to access rows of the joined table - whether the join table is an inner table of an outer join or semi-join + - whether the optimizer switches + outer_join_with_cache, semijoin_with_cache, join_cache_incremental, + join_cache_hashed, join_cache_bka, + are set on or off - the join cache level set for the query - the join 'options'. + In any case join buffer is not used if the number of the joined table is greater than 'no_jbuf_after'. It's also never used if the value of join_cache_level is equal to 0. - The other valid settings of join_cache_level lay in the interval 1..8. - If join_cache_level==1|2 then join buffer is used only for inner joins - with 'JT_ALL' access method. - If join_cache_level==3|4 then join buffer is used for any join operation - (inner join, outer join, semi-join) with 'JT_ALL' access method. - If 'JT_ALL' access method is used to read rows of the joined table then - always a JOIN_CACHE_BNL object is employed. + If the optimizer switch outer_join_with_cache is off no join buffer is + used for outer join operations. + If the optimizer switch semijoin_with_cache is off no join buffer is used + for semi-join operations. + If the optimizer switch join_cache_incremental is off no incremental join + buffers are used. + If the optimizer switch join_cache_hashed is off then the optimizer does + not use neither BNLH algorithm, nor BKAH algorithm to perform join + operations. + + If the optimizer switch join_cache_bka is off then the optimizer does not + use neither BKA algprithm, nor BKAH algorithm to perform join operation. + The valid settings for join_cache_level lay in the interval 0..8. + If it set to 0 no join buffers are used to perform join operations. + Currently we differentiate between join caches of 8 levels: + 1 : non-incremental join cache used for BNL join algorithm + 2 : incremental join cache used for BNL join algorithm + 3 : non-incremental join cache used for BNLH join algorithm + 4 : incremental join cache used for BNLH join algorithm + 5 : non-incremental join cache used for BKA join algorithm + 6 : incremental join cache used for BKA join algorithm + 7 : non-incremental join cache used for BKAH join algorithm + 8 : incremental join cache used for BKAH join algorithm + If the value of join_cache_level is set to n then no join caches of + levels higher than n can be employed. + + If the optimizer switches outer_join_with_cache, semijoin_with_cache, + join_cache_incremental, join_cache_hashed, join_cache_bka are all on + the following rules are applied. + If join_cache_level==1|2 then join buffer is used for inner joins, outer + joins and semi-joins with 'JT_ALL' access method. In this case a + JOIN_CACHE_BNL object is employed. + If join_cache_level==3|4 and then join buffer is used for a join operation + (inner join, outer join, semi-join) with 'JT_REF'/'JT_EQREF' access method + then a JOIN_CACHE_BNLH object is employed. If an index is used to access rows of the joined table and the value of join_cache_level==5|6 then a JOIN_CACHE_BKA object is employed. If an index is used to access rows of the joined table and the value of - join_cache_level==7|8 then a JOIN_CACHE_BKA_UNIQUE object is employed. + join_cache_level==7|8 then a JOIN_CACHE_BKAH object is employed. If the value of join_cache_level is odd then creation of a non-linked join cache is forced. + + Currently for any join operation a join cache of the level of the + highest allowed and applicable level is used. + For example, if join_cache_level is set to 6 and the optimizer switch + join_cache_bka is off, while the optimizer switch join_cache_hashed is + on then for any inner join operation with JT_REF/JT_EQREF access method + to the joined table the BNLH join algorithm will be used, while for + the table accessed by the JT_ALL methods the BNL algorithm will be used. + If the function decides that a join buffer can be used to join the table 'tab' then it sets the value of tab->use_join_buffer to TRUE and assigns the selected join cache object to the field 'cache' of the previous @@ -7360,10 +7497,13 @@ end_sj_materialize(JOIN *join, JOIN_TAB *join_tab, bool end_of_records) For a nested outer join/semi-join, currently, we either use join buffers for all inner tables or for none of them. Some engines (e.g. Falcon) currently allow to use only a join cache - of the type JOIN_CACHE_BKA_UNIQUE when the joined table is accessed through + of the type JOIN_CACHE_BKAH when the joined table is accessed through an index. For these engines setting the value of join_cache_level to 5 or 6 results in that no join buffer is used to join the table. + RETURN VALUE + cache level if cache is used, otherwise returns 0 + TODO Support BKA inside SJ-Materialization nests. When doing this, we'll need to only store sj-inner tables in the join buffer. @@ -7387,17 +7527,14 @@ end_sj_materialize(JOIN *join, JOIN_TAB *join_tab, bool end_of_records) first_tab= join->join_tab + first_sjm_table; } #endif - - RETURN - - cache level if cache is used, otherwise returns 0 */ static uint check_join_cache_usage(JOIN_TAB *tab, JOIN *join, ulonglong options, uint no_jbuf_after, - bool *icp_other_tables_ok) + bool *icp_other_tables_ok, + bool *idx_cond_fact_out) { uint flags; COST_VECT cost; @@ -7405,10 +7542,16 @@ uint check_join_cache_usage(JOIN_TAB *tab, uint bufsz= 4096; JOIN_CACHE *prev_cache=0; uint cache_level= join->thd->variables.join_cache_level; - bool force_unlinked_cache= test(cache_level & 1); + bool force_unlinked_cache= + !optimizer_flag(join->thd, OPTIMIZER_SWITCH_JOIN_CACHE_INCREMENTAL); + bool no_hashed_cache= + !optimizer_flag(join->thd, OPTIMIZER_SWITCH_JOIN_CACHE_HASHED); + bool no_bka_cache= + !optimizer_flag(join->thd, OPTIMIZER_SWITCH_JOIN_CACHE_BKA); uint i= tab - join->join_tab; *icp_other_tables_ok= TRUE; + *idx_cond_fact_out= TRUE; if (cache_level == 0 || i == join->const_tables) return 0; @@ -7420,16 +7563,23 @@ uint check_join_cache_usage(JOIN_TAB *tab, */ if (tab->use_quick == 2) goto no_join_cache; + + if (tab->is_inner_table_of_semi_join_with_first_match() && + !optimizer_flag(join->thd, OPTIMIZER_SWITCH_SEMIJOIN_WITH_CACHE)) + goto no_join_cache; + if (tab->is_inner_table_of_outer_join() && + !optimizer_flag(join->thd, OPTIMIZER_SWITCH_OUTER_JOIN_WITH_CACHE)) + goto no_join_cache; + /* Non-linked join buffers can't guarantee one match */ - if (force_unlinked_cache && - (!tab->type == JT_ALL || cache_level <= 4) && - ((tab->is_inner_table_of_semi_join_with_first_match() && - !tab->is_single_inner_of_semi_join_with_first_match()) || - (tab->is_inner_table_of_outer_join() && - !tab->is_single_inner_of_outer_join()))) - goto no_join_cache; + if (force_unlinked_cache && + ((tab->is_inner_table_of_semi_join_with_first_match() && + !tab->is_single_inner_of_semi_join_with_first_match()) || + (tab->is_inner_table_of_outer_join() && + !tab->is_single_inner_of_outer_join()))) + goto no_join_cache; /* Don't use join buffering if we're dictated not to by no_jbuf_after (this @@ -7474,43 +7624,78 @@ uint check_join_cache_usage(JOIN_TAB *tab, switch (tab->type) { case JT_ALL: - if (cache_level <= 2 && (tab->first_inner || tab->first_sj_inner_tab)) - goto no_join_cache; - if ((options & SELECT_DESCRIBE) || - (((tab->cache= new JOIN_CACHE_BNL(join, tab, prev_cache))) && - !tab->cache->init())) + if (cache_level == 1) + prev_cache= 0; + if ((tab->cache= new JOIN_CACHE_BNL(join, tab, prev_cache)) && + ((options & SELECT_DESCRIBE) || !tab->cache->init())) { *icp_other_tables_ok= FALSE; - return cache_level; + return (2-test(!prev_cache)); } goto no_join_cache; case JT_SYSTEM: case JT_CONST: case JT_REF: case JT_EQ_REF: - if (cache_level <= 4) - return 0; + if (cache_level <=2 || (no_hashed_cache && no_bka_cache)) + goto no_join_cache; + flags= HA_MRR_NO_NULL_ENDPOINTS; if (tab->table->covering_keys.is_set(tab->ref.key)) flags|= HA_MRR_INDEX_ONLY; rows= tab->table->file->multi_range_read_info(tab->ref.key, 10, 20, &bufsz, &flags, &cost); - if ((rows != HA_POS_ERROR) && !(flags & HA_MRR_USE_DEFAULT_IMPL) && - (!(flags & HA_MRR_NO_ASSOCIATION) || cache_level > 6) && - ((options & SELECT_DESCRIBE) || - (((cache_level <= 6 && - (tab->cache= new JOIN_CACHE_BKA(join, tab, flags, prev_cache))) || - (cache_level > 6 && - (tab->cache= new JOIN_CACHE_BKA_UNIQUE(join, tab, flags, prev_cache))) - ) && !tab->cache->init()))) - return cache_level; + + if ((cache_level <=4 && !no_hashed_cache) || no_bka_cache || + (flags & HA_MRR_NO_ASSOCIATION) && cache_level <=6) + { + if (cache_level == 3) + prev_cache= 0; + if ((tab->cache= new JOIN_CACHE_BNLH(join, tab, prev_cache)) && + ((options & SELECT_DESCRIBE) || !tab->cache->init())) + { + *icp_other_tables_ok= FALSE; + return (4-test(!prev_cache)); + } + goto no_join_cache; + } + if (cache_level > 4 && no_bka_cache) + goto no_join_cache; + + if ((flags & HA_MRR_NO_ASSOCIATION) && + (cache_level <= 6 || no_hashed_cache)) + goto no_join_cache; + + if ((rows != HA_POS_ERROR) && !(flags & HA_MRR_USE_DEFAULT_IMPL)) + { + if (cache_level <= 6 || no_hashed_cache) + { + if (cache_level == 5) + prev_cache= 0; + if ((tab->cache= new JOIN_CACHE_BKA(join, tab, flags, prev_cache)) && + ((options & SELECT_DESCRIBE) || !tab->cache->init())) + return (6-test(!prev_cache)); + goto no_join_cache; + } + else + { + if (cache_level == 7) + prev_cache= 0; + if ((tab->cache= new JOIN_CACHE_BKAH(join, tab, flags, prev_cache)) && + ((options & SELECT_DESCRIBE) || !tab->cache->init())) + { + *idx_cond_fact_out= FALSE; + return (8-test(!prev_cache)); + } + goto no_join_cache; + } + } goto no_join_cache; default : ; } no_join_cache: - if (cache_level>2) - revise_cache_usage(tab); + revise_cache_usage(tab); return 0; } @@ -7541,6 +7726,7 @@ static bool make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) { uint i; + uint jcl; bool statistics= test(!(join->select_options & SELECT_DESCRIBE)); bool sorted= 1; uint first_sjm_table= MAX_TABLES; @@ -7552,17 +7738,31 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) setup_semijoin_dups_elimination(join, options, no_jbuf_after)) DBUG_RETURN(TRUE); /* purecov: inspected */ + for (i= 0; i < join->const_tables; i++) + join->join_tab[i].partial_join_cardinality= 1; + for (i=join->const_tables ; i < join->tables ; i++) { JOIN_TAB *tab=join->join_tab+i; TABLE *table=tab->table; bool icp_other_tables_ok; + bool idx_cond_fact_out; tab->read_record.table= table; tab->read_record.file=table->file; tab->read_record.unlock_row= rr_unlock_row; tab->next_select=sub_select; /* normal select */ tab->sorted= sorted; sorted= 0; // only first must be sorted + + /* + The approximation below for partial join cardinality is not good because + - it does not take into account some pushdown predicates + - it does not differentiate between inner joins, outer joins and semi-joins. + Later it should be improved. + */ + tab->partial_join_cardinality= join->best_positions[i].records_read * + (i ? (tab-1)->partial_join_cardinality : 1); + if (tab->loosescan_match_tab) { if (!(tab->loosescan_buf= (uchar*)join->thd->alloc(tab-> @@ -7592,27 +7792,29 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) /* Only happens with outer joins */ tab->read_first_record= tab->type == JT_SYSTEM ? join_read_system :join_read_const; - if (check_join_cache_usage(tab, join, options, no_jbuf_after, - &icp_other_tables_ok)) + if ((jcl= check_join_cache_usage(tab, join, options, + no_jbuf_after, &icp_other_tables_ok, + &idx_cond_fact_out))) { tab->use_join_cache= TRUE; tab[-1].next_select=sub_select_cache; } - else if (table->covering_keys.is_set(tab->ref.key) && !table->no_keyread) { table->key_read=1; table->file->extra(HA_EXTRA_KEYREAD); } - else - push_index_cond(tab, tab->ref.key, icp_other_tables_ok); + else if (!jcl || jcl > 4) + push_index_cond(tab, tab->ref.key, + icp_other_tables_ok, idx_cond_fact_out); break; case JT_EQ_REF: tab->read_record.unlock_row= join_read_key_unlock_row; /* fall through */ - if (check_join_cache_usage(tab, join, options, no_jbuf_after, - &icp_other_tables_ok)) + if ((jcl= check_join_cache_usage(tab, join, options, + no_jbuf_after, &icp_other_tables_ok, + &idx_cond_fact_out))) { tab->use_join_cache= TRUE; tab[-1].next_select=sub_select_cache; @@ -7623,8 +7825,9 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) table->key_read=1; table->file->extra(HA_EXTRA_KEYREAD); } - else - push_index_cond(tab, tab->ref.key, icp_other_tables_ok ); + else if (!jcl || jcl > 4) + push_index_cond(tab, tab->ref.key, + icp_other_tables_ok, idx_cond_fact_out); break; case JT_REF_OR_NULL: case JT_REF: @@ -7635,8 +7838,9 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) } delete tab->quick; tab->quick=0; - if (check_join_cache_usage(tab, join, options, no_jbuf_after, - &icp_other_tables_ok)) + if ((jcl= check_join_cache_usage(tab, join, options, + no_jbuf_after, &icp_other_tables_ok, + &idx_cond_fact_out))) { tab->use_join_cache= TRUE; tab[-1].next_select=sub_select_cache; @@ -7644,8 +7848,9 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) if (table->covering_keys.is_set(tab->ref.key) && !table->no_keyread) table->enable_keyread(); - else - push_index_cond(tab, tab->ref.key, icp_other_tables_ok); + else if (!jcl || jcl > 4) + push_index_cond(tab, tab->ref.key, + icp_other_tables_ok, idx_cond_fact_out); break; case JT_ALL: /* @@ -7655,7 +7860,7 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) materialization nest. */ if (check_join_cache_usage(tab, join, options, no_jbuf_after, - &icp_other_tables_ok)) + &icp_other_tables_ok, &idx_cond_fact_out)) { tab->use_join_cache= TRUE; tab[-1].next_select=sub_select_cache; @@ -7732,7 +7937,8 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) } if (tab->select && tab->select->quick && tab->select->quick->index != MAX_KEY && ! tab->table->key_read) - push_index_cond(tab, tab->select->quick->index, icp_other_tables_ok); + push_index_cond(tab, tab->select->quick->index, + icp_other_tables_ok, idx_cond_fact_out); } break; case JT_FT: @@ -7756,8 +7962,11 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) JOIN_TAB *tab=join->join_tab+i; if (tab->use_join_cache) { - JOIN_TAB *sort_by_tab= join->get_sort_by_join_tab(); - if (sort_by_tab && !join->need_tmp) + JOIN_TAB *sort_by_tab= join->group && join->simple_group && + join->group_list ? + join->join_tab+join->const_tables : + join->get_sort_by_join_tab(); + if (sort_by_tab) { join->need_tmp= 1; join->simple_order= join->simple_group= 0; @@ -13070,7 +13279,7 @@ sub_select(JOIN *join,JOIN_TAB *join_tab,bool end_of_records) DBUG_RETURN(nls); } int error; - enum_nested_loop_state rc; + enum_nested_loop_state rc= NESTED_LOOP_OK; READ_RECORD *info= &join_tab->read_record; if (join_tab->flush_weedout_table) @@ -13103,18 +13312,21 @@ sub_select(JOIN *join,JOIN_TAB *join_tab,bool end_of_records) /* Set first_unmatched for the last inner table of this group */ join_tab->last_inner->first_unmatched= join_tab; - } + if (join_tab->on_precond && !join_tab->on_precond->val_int()) + rc= NESTED_LOOP_NO_MORE_ROWS; + } join->thd->row_count= 0; if (join_tab->loosescan_match_tab) join_tab->loosescan_match_tab->found_match= FALSE; - error= (*join_tab->read_first_record)(join_tab); - - if (join_tab->keep_current_rowid) - join_tab->table->file->position(join_tab->table->record[0]); - - rc= evaluate_join_record(join, join_tab, error); + if (rc != NESTED_LOOP_NO_MORE_ROWS) + { + error= (*join_tab->read_first_record)(join_tab); + if (join_tab->keep_current_rowid) + join_tab->table->file->position(join_tab->table->record[0]); + rc= evaluate_join_record(join, join_tab, error); + } } /* @@ -13406,27 +13618,6 @@ evaluate_null_complemented_join_record(JOIN *join, JOIN_TAB *join_tab) return (*join_tab->next_select)(join, join_tab+1, 0); } -#ifdef MERGE_JUNK -//psergey3-merge: remove: - SQL_SELECT *select; - select= join_tab->select; - - int err= 0; - (err= join_tab->cache.select->skip_record(join->thd)) != 0 )) - { - reset_cache_write(&join_tab->cache); - return NESTED_LOOP_ERROR; - } - - if (!select || (err= select->skip_record(join->thd)) != 0) - if (err < 0) - { - reset_cache_write(&join_tab->cache); - return NESTED_LOOP_ERROR; - } - - rc= NESTED_LOOP_OK; -#endif /***************************************************************************** The different ways to read a record Returns -1 if row was not found, 0 if row was found and 1 on errors @@ -13765,13 +13956,6 @@ join_read_always_key(JOIN_TAB *tab) } } - /* Perform "Late NULLs Filtering" (see internals manual for explanations) */ - for (uint i= 0 ; i < tab->ref.key_parts ; i++) - { - if ((tab->ref.null_rejecting & 1 << i) && tab->ref.items[i]->is_null()) - return -1; - } - if (cp_buffer_from_ref(tab->join->thd, table, &tab->ref)) return -1; if ((error= table->file->ha_index_read_map(table->record[0], @@ -18367,8 +18551,8 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, item_list.push_back(new Item_string("func", strlen("func"), cs)); } /* rows */ - ha_rows rows= (sj_strategy == SJ_OPT_MATERIALIZE_SCAN)? - tab->emb_sj_nest->sj_mat_info->rows : 1; + ha_rows rows= (ha_rows) ((sj_strategy == SJ_OPT_MATERIALIZE_SCAN)? + tab->emb_sj_nest->sj_mat_info->rows : 1); item_list.push_back(new Item_int((longlong)rows, MY_INT64_NUM_DECIMAL_DIGITS)); /* filtered */ @@ -18776,8 +18960,11 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, } } - if (i > 0 && tab[-1].next_select == sub_select_cache) + if (tab->cache) + { extra.append(STRING_WITH_LEN("; Using join buffer")); + tab->cache->print_explain_comment(&extra); + } /* Skip initial "; "*/ const char *str= extra.ptr(); diff --git a/sql/sql_select.h b/sql/sql_select.h index e095974d008..b8bc611a689 100644 --- a/sql/sql_select.h +++ b/sql/sql_select.h @@ -160,7 +160,9 @@ typedef struct st_join_table { TABLE *table; KEYUSE *keyuse; /**< pointer to first used key */ SQL_SELECT *select; - COND *select_cond; + COND *select_cond; + COND *on_precond; /**< part of on condition to check before + accessing the first inner table */ QUICK_SELECT_I *quick; /* The value of select_cond before we've attempted to do Index Condition @@ -216,11 +218,16 @@ typedef struct st_join_table { E(#records) is in found_records. */ ha_rows read_time; - + + double partial_join_cardinality; + table_map dependent,key_dependent; uint use_quick,index; uint status; ///< Save status for cache - uint used_fields,used_fieldlength,used_blobs; + uint used_fields; + ulong used_fieldlength; + ulong max_used_fieldlength; + uint used_blobs; uint used_null_fields; uint used_rowid_fields; uint used_uneven_bit_fields; @@ -235,6 +242,7 @@ typedef struct st_join_table { ha_rows limit; TABLE_REF ref; bool use_join_cache; + ulong join_buffer_size_limit; JOIN_CACHE *cache; /* Index condition for BKA access join @@ -369,6 +377,20 @@ typedef struct st_join_table { select->cond= new_cond; return tmp_select_cond; } + void calc_used_field_length(bool max_fl); + ulong get_used_fieldlength() + { + if (!used_fieldlength) + calc_used_field_length(FALSE); + return used_fieldlength; + } + ulong get_max_used_fieldlength() + { + if (!max_used_fieldlength) + calc_used_field_length(TRUE); + return max_used_fieldlength; + } + double get_partial_join_cardinality() { return partial_join_cardinality; } } JOIN_TAB; @@ -409,20 +431,25 @@ typedef struct st_cache_field { } CACHE_FIELD; +class JOIN_TAB_SCAN; + + /* - JOIN_CACHE is the base class to support the implementations of both - Blocked-Based Nested Loops (BNL) Join Algorithm and Batched Key Access (BKA) - Join Algorithm. The first algorithm is supported by the derived class - JOIN_CACHE_BNL, while the second algorithm is supported by the derived - class JOIN_CACHE_BKA. - These two algorithms have a lot in common. Both algorithms first - accumulate the records of the left join operand in a join buffer and - then search for matching rows of the second operand for all accumulated - records. - For the first algorithm this strategy saves on logical I/O operations: + JOIN_CACHE is the base class to support the implementations of + - Block Nested Loop (BNL) Join Algorithm, + - Block Nested Loop Hash (BNLH) Join Algorithm, + - Batched Key Access (BKA) Join Algorithm. + The first algorithm is supported by the derived class JOIN_CACHE_BNL, + the second algorithm is supported by the derived class JOIN_CACHE_BNLH, + while the third algorithm is implemented in two variant supported by + the classes JOIN_CACHE_BKA and JOIN_CACHE_BKAH. + These three algorithms have a lot in common. Each of them first accumulates + the records of the left join operand in a join buffer and then searches for + matching rows of the second operand for all accumulated records. + For the first two algorithms this strategy saves on logical I/O operations: the entire set of records from the join buffer requires only one look-through - the records provided by the second operand. - For the second algorithm the accumulation of records allows to optimize + of the records provided by the second operand. + For the third algorithm the accumulation of records allows to optimize fetching rows of the second operand from disk for some engines (MyISAM, InnoDB), or to minimize the number of round-trips between the Server and the engine nodes (NDB Cluster). @@ -470,7 +497,7 @@ protected: } /* - The total maximal length of the fields stored for a record in the cache. + The maximum total length of the fields stored for a record in the cache. For blob fields only the sizes of the blob lengths are taken into account. */ uint length; @@ -483,7 +510,7 @@ protected: /* Cardinality of the range of join tables whose fields can be put into the - cache. (A table from the range not necessarily contributes to the cache.) + cache. A table from the range not necessarily contributes to the cache. */ uint tables; @@ -507,9 +534,11 @@ protected: /* The total number of fields referenced from field descriptors for other join - caches. These fields are used to construct key values to access matching - rows with index lookups. Currently the fields can be referenced only from - descriptors for bka caches. However they may belong to a cache of any type. + caches. These fields are used to construct key values. + When BKA join algorithm is employed the constructed key values serve to + access matching rows with index lookups. + The key values are put into a hash table when the BNLH join algorithm + is employed and when BKAH is used for the join operation. */ uint referenced_fields; @@ -524,7 +553,8 @@ protected: descriptors. This number can be useful for implementations of the init methods. */ - uint data_field_ptr_count; + uint data_field_ptr_count; + /* Array of the descriptors of fields containing 'fields' elements. These are all fields that are stored for a record in the cache. @@ -560,6 +590,27 @@ protected: */ uint pack_length_with_blob_ptrs; + /* + The total size of the record base prefix. The base prefix of record may + include the following components: + - the length of the record + - the link to a record in a previous buffer. + Each record in the buffer are supplied with the same set of the components. + */ + uint base_prefix_length; + + /* + The expected length of a record in the join buffer together with + all prefixes and postfixes + */ + ulong avg_record_length; + + /* The expected size of the space per record in the auxiliary buffer */ + ulong avg_aux_buffer_incr; + + /* Expected join buffer space used for one record */ + ulong space_per_record; + /* Pointer to the beginning of the join buffer */ uchar *buff; /* @@ -567,11 +618,25 @@ protected: Part of this memory may be reserved for the auxiliary buffer. */ ulong buff_size; - /* Size of the auxiliary buffer. */ + /* The minimal join buffer size when join buffer still makes sense to use */ + ulong min_buff_size; + /* The maximum expected size if the join buffer to be used */ + ulong max_buff_size; + /* Size of the auxiliary buffer */ ulong aux_buff_size; /* The number of records put into the join buffer */ - uint records; + ulong records; + /* + The number of records in the fully refilled join buffer of + the minimal size equal to min_buff_size + */ + ulong min_records; + /* + The maximum expected number of records to be put in the join buffer + at one refill + */ + ulong max_records; /* Pointer to the current position in the join buffer. @@ -586,13 +651,13 @@ protected: uchar *end_pos; /* - Pointer to the beginning of first field of the current read/write record - from the join buffer. The value is adjusted by the get_record/put_record - functions. + Pointer to the beginning of the first field of the current read/write + record from the join buffer. The value is adjusted by the + get_record/put_record functions. */ uchar *curr_rec_pos; /* - Pointer to the beginning of first field of the last record + Pointer to the beginning of the first field of the last record from the join buffer. */ uchar *last_rec_pos; @@ -611,16 +676,63 @@ protected: In the simplest case a record link is just a pointer to the beginning of the record stored in the buffer. In a more general case a link could be a reference to an array of pointers - to records in the buffer. */ + to records in the buffer. + */ uchar *curr_rec_link; + /* + This flag is set to TRUE if join_tab is the first inner table of an outer + join and the latest record written to the join buffer is detected to be + null complemented after checking on conditions over the outer tables for + this outer join operation + */ + bool last_written_is_null_compl; + + /* + The number of fields put in the join buffer of the join cache that are + used in building keys to access the table join_tab + */ + uint local_key_arg_fields; + /* + The total number of the fields in the previous caches that are used + in building keys to access the table join_tab + */ + uint external_key_arg_fields; + + /* + This flag indicates that the key values will be read directly from the join + buffer. It will save us building key values in the key buffer. + */ + bool use_emb_key; + /* The length of an embedded key value */ + uint emb_key_length; + + /* + This object provides the methods to iterate over records of + the joined table join_tab when looking for join matches between + records from join buffer and records from join_tab. + BNL and BNLH join algorithms retrieve all records from join_tab, + while BKA/BKAH algorithm iterates only over those records from + join_tab that can be accessed by look-ups with join keys built + from records in join buffer. + */ + JOIN_TAB_SCAN *join_tab_scan; + void calc_record_fields(); - int alloc_fields(uint external_fields); + void collect_info_on_key_args(); + int alloc_fields(); void create_flag_fields(); - void create_remaining_fields(bool all_read_fields); + void create_key_arg_fields(); + void create_remaining_fields(); void set_constants(); int alloc_buffer(); + /* Shall reallocate the join buffer */ + virtual int realloc_buffer(); + + /* Check the possibility to read the access keys directly from join buffer */ + bool check_emb_key_usage(); + uint get_size_of_rec_offset() { return size_of_rec_ofs; } uint get_size_of_rec_length() { return size_of_rec_len; } uint get_size_of_fld_offset() { return size_of_fld_ofs; } @@ -642,7 +754,6 @@ protected: { store_offset(size_of_rec_ofs, ptr-size_of_rec_ofs, (ulong) (ref-buff)); } - void store_rec_length(uchar *ptr, ulong len) { store_offset(size_of_rec_len, ptr, len); @@ -655,12 +766,23 @@ protected: /* Write record fields and their required offsets into the join buffer */ uint write_record_data(uchar *link, bool *is_full); + /* Get the total length of all prefixes of a record in the join buffer */ + virtual uint get_prefix_length() { return base_prefix_length; } + /* Get maximum total length of all affixes of a record in the join buffer */ + virtual uint get_record_max_affix_length(); + + /* + Shall get maximum size of the additional space per record used for + record keys + */ + virtual uint get_max_key_addon_space_per_record() { return 0; } + /* This method must determine for how much the auxiliary buffer should be incremented when a new record is added to the join buffer. If no auxiliary buffer is needed the function should return 0. */ - virtual uint aux_buffer_incr() { return 0; } + virtual uint aux_buffer_incr(ulong recno); /* Shall calculate how much space is remaining in the join buffer */ virtual ulong rem_space() @@ -668,8 +790,11 @@ protected: return max(buff_size-(end_pos-buff)-aux_buff_size,0); } - /* Shall skip record from the join buffer if its match flag is on */ - virtual bool skip_record_if_match(); + /* + Shall calculate how much space is taken by allocation of the key + for a record in the join buffer + */ + virtual uint extra_key_length() { return 0; } /* Read all flag and data fields of a record from the join buffer */ uint read_all_record_fields(); @@ -684,6 +809,18 @@ protected: bool read_referenced_field(CACHE_FIELD *copy, uchar *rec_ptr, uint *len); /* + Shall skip record from the join buffer if its match flag + is set to MATCH_FOUND + */ + virtual bool skip_if_matched(); + + /* + Shall skip record from the join buffer if its match flag + commands to do so + */ + virtual bool skip_if_not_needed_match(); + + /* True if rec_ptr points to the record whose blob data stay in record buffers */ @@ -692,16 +829,61 @@ protected: return rec_ptr == last_rec_pos && last_rec_blob_data_is_in_rec_buff; } - /* Find matches from the next table for records from the join buffer */ - virtual enum_nested_loop_state join_matching_records(bool skip_last)=0; + /* Find matches from the next table for records from the join buffer */ + virtual enum_nested_loop_state join_matching_records(bool skip_last); + + /* Shall set an auxiliary buffer up (currently used only by BKA joins) */ + virtual int setup_aux_buffer(HANDLER_BUFFER &aux_buff) + { + DBUG_ASSERT(0); + return 0; + } + + /* + Shall get the number of ranges in the cache buffer passed + to the MRR interface + */ + virtual uint get_number_of_ranges_for_mrr() { return 0; }; + + /* + Shall prepare to look for records from the join cache buffer that would + match the record of the joined table read into the record buffer + */ + virtual bool prepare_look_for_matches(bool skip_last)= 0; + /* + Shall return a pointer to the record from join buffer that is checked + as the next candidate for a match with the current record from join_tab. + Each implementation of this virtual function should bare in mind + that the record position it returns shall be exactly the position + passed as the parameter to the implementations of the virtual functions + skip_next_candidate_for_match and read_next_candidate_for_match. + */ + virtual uchar *get_next_candidate_for_match()= 0; + /* + Shall check whether the given record from the join buffer has its match + flag settings commands to skip the record in the buffer. + */ + virtual bool skip_next_candidate_for_match(uchar *rec_ptr)= 0; + /* + Shall read the given record from the join buffer into the + the corresponding record buffer + */ + virtual void read_next_candidate_for_match(uchar *rec_ptr)= 0; + + /* + Shall return the location of the association label returned by + the multi_read_range_next function for the current record loaded + into join_tab's record buffer + */ + virtual uchar **get_curr_association_ptr() { return 0; }; - /* Add null complements for unmatched outer records from buffer */ + /* Add null complements for unmatched outer records from the join buffer */ virtual enum_nested_loop_state join_null_complements(bool skip_last); /* Restore the fields of the last record from the join buffer */ virtual void restore_last_record(); - /*Set match flag for a record in join buffer if it has not been set yet */ + /* Set match flag for a record in join buffer if it has not been set yet */ bool set_match_flag_if_none(JOIN_TAB *first_inner, uchar *rec_ptr); enum_nested_loop_state generate_full_extensions(uchar *rec_ptr); @@ -709,7 +891,65 @@ protected: /* Check matching to a partial join record from the join buffer */ bool check_match(uchar *rec_ptr); + /* + This constructor creates an unlinked join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables + specified by the 'j' parameter. + */ + JOIN_CACHE(JOIN *j, JOIN_TAB *tab) + { + join= j; + join_tab= tab; + prev_cache= next_cache= 0; + buff= 0; + } + + /* + This constructor creates a linked join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables + specified by the 'j' parameter. The parameter 'prev' specifies the previous + cache object to which this cache is linked. + */ + JOIN_CACHE(JOIN *j, JOIN_TAB *tab, JOIN_CACHE *prev) + { + join= j; + join_tab= tab; + next_cache= 0; + prev_cache= prev; + buff= 0; + if (prev) + prev->next_cache= this; + } + public: + + /* + The enumeration type Join_algorithm includes a mnemonic constant for + each join algorithm that employs join buffers + */ + + enum Join_algorithm + { + BNL_JOIN_ALG, /* Block Nested Loop Join algorithm */ + BNLH_JOIN_ALG, /* Block Nested Loop Hash Join algorithm */ + BKA_JOIN_ALG, /* Batched Key Access Join algorithm */ + BKAH_JOIN_ALG, /* Batched Key Access with Hash Table Join Algorithm */ + }; + + /* + The enumeration type Match_flag describes possible states of the match flag + field stored for the records of the first inner tables of outer joins and + semi-joins in the cases when the first match strategy is used for them. + When a record with match flag field is written into the join buffer the + state of the field usually is MATCH_NOT_FOUND unless this is a record of the + first inner table of the outer join for which the on precondition (the + condition from on expression over outer tables) has turned out not to be + true. In the last case the state of the match flag is MATCH_IMPOSSIBLE. + The state of the match flag field is changed to MATCH_FOUND as soon as + the first full matching combination of inner tables of the outer join or + the semi-join is discovered. + */ + enum Match_flag { MATCH_NOT_FOUND, MATCH_FOUND, MATCH_IMPOSSIBLE }; /* Table to be joined with the partial join records from the cache */ JOIN_TAB *join_tab; @@ -720,10 +960,29 @@ public: JOIN_CACHE *next_cache; /* Shall initialize the join cache structure */ - virtual int init()=0; + virtual int init(); + + /* Get the current size of the cache join buffer */ + ulong get_join_buffer_size() { return buff_size; } + /* Set the size of the cache join buffer to a new value */ + void set_join_buffer_size(ulong sz) { buff_size= sz; } - /* The function shall return TRUE only for BKA caches */ - virtual bool is_key_access() { return FALSE; } + /* Get the minimum possible size of the cache join buffer */ + virtual ulong get_min_join_buffer_size(); + /* Get the maximum possible size of the cache join buffer */ + virtual ulong get_max_join_buffer_size(); + + /* Shrink the size if the cache join buffer in a given ratio */ + bool shrink_join_buffer_in_ratio(ulonglong n, ulonglong d); + + /* Shall return the type of the employed join algorithm */ + virtual enum Join_algorithm get_join_alg()= 0; + + /* + The function shall return TRUE only when there is a key access + to the join table + */ + virtual bool is_key_access()= 0; /* Shall reset the join buffer for reading/writing */ virtual void reset(bool for_writing); @@ -747,7 +1006,7 @@ public: virtual void get_record_by_pos(uchar *rec_ptr); /* Shall return the value of the match flag for the positioned record */ - virtual bool get_match_flag_by_pos(uchar *rec_ptr); + virtual enum Match_flag get_match_flag_by_pos(uchar *rec_ptr); /* Shall return the position of the current record */ virtual uchar *get_curr_rec() { return curr_rec_pos; } @@ -761,9 +1020,12 @@ public: return (curr_rec_link ? curr_rec_link : get_curr_rec()); } - /* Join records from the join buffer with records from the next join table */ + /* Join records from the join buffer with records from the next join table */ enum_nested_loop_state join_records(bool skip_last); + /* Add a comment on the join algorithm employed by the join cache */ + void print_explain_comment(String *str); + virtual ~JOIN_CACHE() {} void reset_join(JOIN *j) { join= j; } void free() @@ -772,164 +1034,31 @@ public: buff= 0; } + friend class JOIN_CACHE_HASHED; friend class JOIN_CACHE_BNL; friend class JOIN_CACHE_BKA; - friend class JOIN_CACHE_BKA_UNIQUE; -}; - - -class JOIN_CACHE_BNL :public JOIN_CACHE -{ - -protected: - - /* Using BNL find matches from the next table for records from join buffer */ - enum_nested_loop_state join_matching_records(bool skip_last); - -public: - - /* - This constructor creates an unlinked BNL join cache. The cache is to be - used to join table 'tab' to the result of joining the previous tables - specified by the 'j' parameter. - */ - JOIN_CACHE_BNL(JOIN *j, JOIN_TAB *tab) - { - join= j; - join_tab= tab; - prev_cache= next_cache= 0; - } - - /* - This constructor creates a linked BNL join cache. The cache is to be - used to join table 'tab' to the result of joining the previous tables - specified by the 'j' parameter. The parameter 'prev' specifies the previous - cache object to which this cache is linked. - */ - JOIN_CACHE_BNL(JOIN *j, JOIN_TAB *tab, JOIN_CACHE *prev) - { - join= j; - join_tab= tab; - prev_cache= prev; - next_cache= 0; - if (prev) - prev->next_cache= this; - } - - /* Initialize the BNL cache */ - int init(); + friend class JOIN_TAB_SCAN; + friend class JOIN_TAB_SCAN_MRR; }; -class JOIN_CACHE_BKA :public JOIN_CACHE -{ -protected: - - /* Flag to to be passed to the MRR interface */ - uint mrr_mode; - - /* MRR buffer assotiated with this join cache */ - HANDLER_BUFFER mrr_buff; - - /* Shall initialize the MRR buffer */ - virtual void init_mrr_buff() - { - mrr_buff.buffer= end_pos; - mrr_buff.buffer_end= buff+buff_size; - } - - /* - The number of the cache fields that are used in building keys to access - the table join_tab - */ - uint local_key_arg_fields; - /* - The total number of the fields in the previous caches that are used - in building keys t access the table join_tab - */ - uint external_key_arg_fields; - - /* - This flag indicates that the key values will be read directly from the join - buffer. It will save us building key values in the key buffer. - */ - bool use_emb_key; - /* The length of an embedded key value */ - uint emb_key_length; - - /* Check the possibility to read the access keys directly from join buffer */ - bool check_emb_key_usage(); - - /* Calculate the increment of the MM buffer for a record write */ - uint aux_buffer_incr(); - - /* Using BKA find matches from the next table for records from join buffer */ - enum_nested_loop_state join_matching_records(bool skip_last); - - /* Prepare to search for records that match records from the join buffer */ - enum_nested_loop_state init_join_matching_records(RANGE_SEQ_IF *seq_funcs, - uint ranges); - - /* Finish searching for records that match records from the join buffer */ - enum_nested_loop_state end_join_matching_records(enum_nested_loop_state rc); - -public: - - /* - This constructor creates an unlinked BKA join cache. The cache is to be - used to join table 'tab' to the result of joining the previous tables - specified by the 'j' parameter. - The MRR mode initially is set to 'flags'. - */ - JOIN_CACHE_BKA(JOIN *j, JOIN_TAB *tab, uint flags) - { - join= j; - join_tab= tab; - prev_cache= next_cache= 0; - mrr_mode= flags; - } - - /* - This constructor creates a linked BKA join cache. The cache is to be - used to join table 'tab' to the result of joining the previous tables - specified by the 'j' parameter. The parameter 'prev' specifies the cache - object to which this cache is linked. - The MRR mode initially is set to 'flags'. - */ - JOIN_CACHE_BKA(JOIN *j, JOIN_TAB *tab, uint flags, JOIN_CACHE* prev) - { - join= j; - join_tab= tab; - prev_cache= prev; - next_cache= 0; - if (prev) - prev->next_cache= this; - mrr_mode= flags; - } - - /* Initialize the BKA cache */ - int init(); - - bool is_key_access() { return TRUE; } - - /* Shall get the key built over the next record from the join buffer */ - virtual uint get_next_key(uchar **key); - - /* Check if the record combination matches the index condition */ - bool skip_index_tuple(range_seq_t rseq, char *range_info); -}; /* - The class JOIN_CACHE_BKA_UNIQUE supports the variant of the BKA join algorithm - that submits only distinct keys to the MRR interface. The records in the join - buffer of a cache of this class that have the same access key are linked into - a chain attached to a key entry structure that either itself contains the key - value, or, in the case when the keys are embedded, refers to its occurance in - one of the records from the chain. + The class JOIN_CACHE_HASHED is the base class for the classes + JOIN_CACHE_HASHED_BNL and JOIN_CACHE_HASHED_BKA. The first of them supports + an implementation of Block Nested Loop Hash (BNLH) Join Algorithm, + while the second is used for a variant of the BKA Join algorithm that performs + only one lookup for any records from join buffer with the same key value. + For a join cache of this class the records from the join buffer that have + the same access key are linked into a chain attached to a key entry structure + that either itself contains the key value, or, in the case when the keys are + embedded, refers to its occurrence in one of the records from the chain. To build the chains with the same keys a hash table is employed. It is placed at the very end of the join buffer. The array of hash entries is allocated - first at the very bottom of the join buffer, then go key entries. A hash entry - contains a header of the list of the key entries with the same hash value. + first at the very bottom of the join buffer, while key entries are placed + before this array. + A hash entry contains a header of the list of the key entries with the same + hash value. Each key entry is a structure of the following type: struct st_join_cache_key_entry { union { @@ -942,17 +1071,10 @@ public: The references linking the records in a chain are always placed at the very beginning of the record info stored in the join buffer. The records are linked in a circular list. A new record is always added to the end of this - list. When a key is passed to the MRR interface it can be passed either with - an association link containing a reference to the header of the record chain - attached to the corresponding key entry in the hash table, or without any - association link. When the next record is returned by a call to the MRR - function multi_range_read_next without any association (because if was not - passed together with the key) then the key value is extracted from the - returned record and searched for it in the hash table. If there is any records - with such key the chain of them will be yielded as the result of this search. + list. The following picture represents a typical layout for the info stored in the - join buffer of a join cache object of the JOIN_CACHE_BKA_UNIQUE class. + join buffer of a join cache object of the JOIN_CACHE_HASHED class. buff V @@ -998,7 +1120,7 @@ public: */ -class JOIN_CACHE_BKA_UNIQUE :public JOIN_CACHE_BKA +class JOIN_CACHE_HASHED: public JOIN_CACHE { private: @@ -1023,31 +1145,34 @@ private: /* Number of hash entries in the hash table */ uint hash_entries; + + /* The position of the currently retrieved key entry in the hash table */ + uchar *curr_key_entry; + + /* The offset of the data fields from the beginning of the record fields */ + uint data_fields_offset; + + uint get_hash_idx(uchar* key, uint key_len); + + int init_hash_table(); + void cleanup_hash_table(); + +protected: + /* Number of key entries in the hash table (number of distinct keys) */ uint key_entries; /* The position of the last key entry in the hash table */ uchar *last_key_entry; - /* The position of the currently retrieved key entry in the hash table */ - uchar *curr_key_entry; - /* The offset of the record fields from the beginning of the record representation. The record representation starts with a reference to the next record in the key record chain followed by the length of the trailing record data followed by a reference to the record segment - in the previous cache, if any, followed by the record fields. + in the previous cache, if any, followed by the record fields. */ uint rec_fields_offset; - /* The offset of the data fields from the beginning of the record fields */ - uint data_fields_offset; - - uint get_hash_idx(uchar* key, uint key_len); - - void cleanup_hash_table(); - -protected: uint get_size_of_key_offset() { return size_of_key_ofs; } @@ -1101,8 +1226,8 @@ protected: void store_next_rec_ref(uchar *ref_ptr, uchar *ref) { store_offset(get_size_of_rec_offset(), ref_ptr, (ulong) (ref-buff)); - } - + } + /* Get the position of the embedded key value for the current record pointed to by get_curr_rec(). @@ -1132,6 +1257,18 @@ protected: store_offset(get_size_of_rec_offset(), ref_ptr, (ulong) (ref-buff)); } + /* Get the total length of all prefixes of a record in hashed join buffer */ + uint get_prefix_length() + { + return base_prefix_length + get_size_of_rec_offset(); + } + + /* + Get maximum size of the additional space per record used for + the hash table with record keys + */ + uint get_max_key_addon_space_per_record(); + /* Calculate how much space in the buffer would not be occupied by records, key entries and additional memory for the MMR buffer. @@ -1142,56 +1279,57 @@ protected: } /* - Initialize the MRR buffer allocating some space within the join buffer. - The entire space between the last record put into the join buffer and the - last key entry added to the hash table is used for the MRR buffer. + Calculate how much space is taken by allocation of the key + entry for a record in the join buffer */ - void init_mrr_buff() - { - mrr_buff.buffer= end_pos; - mrr_buff.buffer_end= last_key_entry; - } + uint extra_key_length() { return key_entry_length; } - /* Skip record from JOIN_CACHE_BKA_UNIQUE buffer if its match flag is on */ - bool skip_record_if_match(); + /* + Skip record from a hashed join buffer if its match flag + is set to MATCH_FOUND + */ + bool skip_if_matched(); - /* Using BKA_UNIQUE find matches for records from join buffer */ - enum_nested_loop_state join_matching_records(bool skip_last); + /* + Skip record from a hashed join buffer if its match flag setting + commands to do so + */ + bool skip_if_not_needed_match(); /* Search for a key in the hash table of the join buffer */ bool key_search(uchar *key, uint key_len, uchar **key_ref_ptr); -public: + /* Reallocate the join buffer of a hashed join cache */ + int realloc_buffer(); /* - This constructor creates an unlinked BKA_UNIQUE join cache. The cache is - to be used to join table 'tab' to the result of joining the previous tables + This constructor creates an unlinked hashed join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables specified by the 'j' parameter. - The MRR mode initially is set to 'flags'. */ - JOIN_CACHE_BKA_UNIQUE(JOIN *j, JOIN_TAB *tab, uint flags) - :JOIN_CACHE_BKA(j, tab, flags) {} + JOIN_CACHE_HASHED(JOIN *j, JOIN_TAB *tab) :JOIN_CACHE(j, tab) {} /* - This constructor creates a linked BKA_UNIQUE join cache. The cache is - to be used to join table 'tab' to the result of joining the previous tables - specified by the 'j' parameter. The parameter 'prev' specifies the cache - object to which this cache is linked. - The MRR mode initially is set to 'flags'. + This constructor creates a linked hashed join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables + specified by the 'j' parameter. The parameter 'prev' specifies the previous + cache object to which this cache is linked. */ - JOIN_CACHE_BKA_UNIQUE(JOIN *j, JOIN_TAB *tab, uint flags, JOIN_CACHE* prev) - :JOIN_CACHE_BKA(j, tab, flags, prev) {} + JOIN_CACHE_HASHED(JOIN *j, JOIN_TAB *tab, JOIN_CACHE *prev) + :JOIN_CACHE(j, tab, prev) {} - /* Initialize the BKA_UNIQUE cache */ +public: + + /* Initialize a hashed join cache */ int init(); - /* Reset the JOIN_CACHE_BKA_UNIQUE buffer for reading/writing */ + /* Reset the buffer of a hashed join cache for reading/writing */ void reset(bool for_writing); - /* Add a record into the JOIN_CACHE_BKA_UNIQUE buffer */ + /* Add a record into the buffer of a hashed join cache */ bool put_record(); - /* Read the next record from the JOIN_CACHE_BKA_UNIQUE buffer */ + /* Read the next record from the buffer of a hashed join cache */ bool get_record(); /* @@ -1209,8 +1347,414 @@ public: get_size_of_rec_offset()); } - /* Check if the record combination matches the index condition */ - bool skip_index_tuple(range_seq_t rseq, char *range_info); +}; + + +/* + The class JOIN_TAB_SCAN is a companion class for the classes JOIN_CACHE_BNL + and JOIN_CACHE_BNLH. Actually the class implements the iterator over the + table joinded by BNL/BNLH join algorithm. + The virtual functions open, next and close are called for any iteration over + the table. The function open is called to initiate the process of the + iteration. The function next shall read the next record from the joined + table. The record is read into the record buffer of the joined table. + The record is to be matched with records from the join cache buffer. + The function close shall perform the finalizing actions for the iteration. +*/ + +class JOIN_TAB_SCAN: public Sql_alloc +{ + +private: + /* TRUE if this is the first record from the joined table to iterate over */ + bool is_first_record; + +protected: + + /* The joined table to be iterated over */ + JOIN_TAB *join_tab; + /* The join cache used to join the table join_tab */ + JOIN_CACHE *cache; + /* + Representation of the executed multi-way join through which + all needed context can be accessed. + */ + JOIN *join; + +public: + + JOIN_TAB_SCAN(JOIN *j, JOIN_TAB *tab) + { + join= j; + join_tab= tab; + cache= join_tab->cache; + } + + virtual ~JOIN_TAB_SCAN() {} + + /* + Shall calculate the increment of the auxiliary buffer for a record + write if such a buffer is used by the table scan object + */ + virtual uint aux_buffer_incr(ulong recno) { return 0; } + + /* Initiate the process of iteration over the joined table */ + virtual int open(); + /* + Shall read the next candidate for matches with records from + the join buffer. + */ + virtual int next(); + /* + Perform the finalizing actions for the process of iteration + over the joined_table. + */ + virtual void close(); + +}; + +/* + The class JOIN_CACHE_BNL is used when the BNL join algorithm is + employed to perform a join operation +*/ + +class JOIN_CACHE_BNL :public JOIN_CACHE +{ +private: + /* + The number of the records in the join buffer that have to be + checked yet for a match with the current record of join_tab + read into the record buffer. + */ + uint rem_records; + +protected: + + bool prepare_look_for_matches(bool skip_last); + + uchar *get_next_candidate_for_match(); + + bool skip_next_candidate_for_match(uchar *rec_ptr); + + void read_next_candidate_for_match(uchar *rec_ptr); + +public: + + /* + This constructor creates an unlinked BNL join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables + specified by the 'j' parameter. + */ + JOIN_CACHE_BNL(JOIN *j, JOIN_TAB *tab) :JOIN_CACHE(j, tab) {} + + /* + This constructor creates a linked BNL join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables + specified by the 'j' parameter. The parameter 'prev' specifies the previous + cache object to which this cache is linked. + */ + JOIN_CACHE_BNL(JOIN *j, JOIN_TAB *tab, JOIN_CACHE *prev) + :JOIN_CACHE(j, tab, prev) {} + + /* Initialize the BNL cache */ + int init(); + + enum Join_algorithm get_join_alg() { return BNL_JOIN_ALG; } + + bool is_key_access() { return FALSE; } + +}; + + +/* + The class JOIN_CACHE_BNLH is used when the BNLH join algorithm is + employed to perform a join operation +*/ + +class JOIN_CACHE_BNLH :public JOIN_CACHE_HASHED +{ + +protected: + + /* + The pointer to the last record from the circular list of the records + that match the join key built out of the record in the join buffer for + the join_tab table + */ + uchar *last_matching_rec_ref_ptr; + /* + The pointer to the next current record from the circular list of the + records that match the join key built out of the record in the join buffer + for the join_tab table. This pointer is used by the class method + get_next_candidate_for_match to iterate over records from the circular + list. + */ + uchar *next_matching_rec_ref_ptr; + + /* + Get the chain of records from buffer matching the current candidate + record for join + */ + uchar *get_matching_chain_by_join_key(); + + bool prepare_look_for_matches(bool skip_last); + + uchar *get_next_candidate_for_match(); + + bool skip_next_candidate_for_match(uchar *rec_ptr); + + void read_next_candidate_for_match(uchar *rec_ptr); + +public: + + /* + This constructor creates an unlinked BNLH join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables + specified by the 'j' parameter. + */ + JOIN_CACHE_BNLH(JOIN *j, JOIN_TAB *tab) : JOIN_CACHE_HASHED(j, tab) {} + + /* + This constructor creates a linked BNLH join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables + specified by the 'j' parameter. The parameter 'prev' specifies the previous + cache object to which this cache is linked. + */ + JOIN_CACHE_BNLH(JOIN *j, JOIN_TAB *tab, JOIN_CACHE *prev) + : JOIN_CACHE_HASHED(j, tab, prev) {} + + /* Initialize the BNLH cache */ + int init(); + + enum Join_algorithm get_join_alg() { return BNLH_JOIN_ALG; } + + bool is_key_access() { return TRUE; } + +}; + + +/* + The class JOIN_TAB_SCAN_MRR is a companion class for the classes + JOIN_CACHE_BKA and JOIN_CACHE_BKAH. Actually the class implements the + iterator over the records from join_tab selected by BKA/BKAH join + algorithm as the candidates to be joined. + The virtual functions open, next and close are called for any iteration over + join_tab record candidates. The function open is called to initiate the + process of the iteration. The function next shall read the next record from + the set of the record candidates. The record is read into the record buffer + of the joined table. The function close shall perform the finalizing actions + for the iteration. +*/ + +class JOIN_TAB_SCAN_MRR: public JOIN_TAB_SCAN +{ + /* Interface object to generate key ranges for MRR */ + RANGE_SEQ_IF range_seq_funcs; + + /* Number of ranges to be processed by the MRR interface */ + uint ranges; + + /* Flag to to be passed to the MRR interface */ + uint mrr_mode; + + /* MRR buffer assotiated with this join cache */ + HANDLER_BUFFER mrr_buff; + + /* Shall initialize the MRR buffer */ + virtual void init_mrr_buff() + { + cache->setup_aux_buffer(mrr_buff); + } + +public: + + JOIN_TAB_SCAN_MRR(JOIN *j, JOIN_TAB *tab, uint flags, RANGE_SEQ_IF rs_funcs) + :JOIN_TAB_SCAN(j, tab), range_seq_funcs(rs_funcs), mrr_mode(flags) {} + + uint aux_buffer_incr(ulong recno); + + int open(); + + int next(); + +}; + +/* + The class JOIN_CACHE_BKA is used when the BKA join algorithm is + employed to perform a join operation +*/ + +class JOIN_CACHE_BKA :public JOIN_CACHE +{ +private: + + /* Flag to to be passed to the companion JOIN_TAB_SCAN_MRR object */ + uint mrr_mode; + + /* + This value is set to 1 by the class prepare_look_for_matches method + and back to 0 by the class get_next_candidate_for_match method + */ + uint rem_records; + + /* + This field contains the current association label set by a call of + the multi_range_read_next handler function. + See the function JOIN_CACHE_BKA::get_curr_key_association() + */ + uchar *curr_association; + +protected: + + /* + Get the number of ranges in the cache buffer passed to the MRR + interface. For each record its own range is passed. + */ + uint get_number_of_ranges_for_mrr() { return records; } + + /* + Setup the MRR buffer as the space between the last record put + into the join buffer and the very end of the join buffer + */ + int setup_aux_buffer(HANDLER_BUFFER &aux_buff) + { + aux_buff.buffer= end_pos; + aux_buff.buffer_end= buff+buff_size; + return 0; + } + + bool prepare_look_for_matches(bool skip_last); + + uchar *get_next_candidate_for_match(); + + bool skip_next_candidate_for_match(uchar *rec_ptr); + + void read_next_candidate_for_match(uchar *rec_ptr); + +public: + + /* + This constructor creates an unlinked BKA join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables + specified by the 'j' parameter. + The MRR mode initially is set to 'flags'. + */ + JOIN_CACHE_BKA(JOIN *j, JOIN_TAB *tab, uint flags) + :JOIN_CACHE(j, tab), mrr_mode(flags) {} + /* + This constructor creates a linked BKA join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables + specified by the 'j' parameter. The parameter 'prev' specifies the previous + cache object to which this cache is linked. + The MRR mode initially is set to 'flags'. + */ + JOIN_CACHE_BKA(JOIN *j, JOIN_TAB *tab, uint flags, JOIN_CACHE *prev) + :JOIN_CACHE(j, tab, prev), mrr_mode(flags) {} + + uchar **get_curr_association_ptr() { return &curr_association; } + + /* Initialize the BKA cache */ + int init(); + + enum Join_algorithm get_join_alg() { return BKA_JOIN_ALG; } + + bool is_key_access() { return TRUE; } + + /* Get the key built over the next record from the join buffer */ + uint get_next_key(uchar **key); + + /* Check index condition of the joined table for a record from BKA cache */ + bool skip_index_tuple(char *range_info); + +}; + + + +/* + The class JOIN_CACHE_BKAH is used when the BKAH join algorithm is + employed to perform a join operation +*/ + +class JOIN_CACHE_BKAH :public JOIN_CACHE_BNLH +{ + +private: + /* Flag to to be passed to the companion JOIN_TAB_SCAN_MRR object */ + uint mrr_mode; + + /* + This flag is set to TRUE if the implementation of the MRR interface cannot + handle range association labels and does not return them to the caller of + the multi_range_read_next handler function. E.g. the implementation of + the MRR inteface for the Falcon engine could not return association + labels to the caller of multi_range_read_next. + The flag is set by JOIN_CACHE_BKA::init() and is not ever changed. + */ + bool no_association; + + /* + This field contains the association label returned by the + multi_range_read_next function. + See the function JOIN_CACHE_BKAH::get_curr_key_association() + */ + uchar *curr_matching_chain; + +protected: + + uint get_number_of_ranges_for_mrr() { return key_entries; } + + /* + Initialize the MRR buffer allocating some space within the join buffer. + The entire space between the last record put into the join buffer and the + last key entry added to the hash table is used for the MRR buffer. + */ + int setup_aux_buffer(HANDLER_BUFFER &aux_buff) + { + aux_buff.buffer= end_pos; + aux_buff.buffer_end= last_key_entry; + return 0; + } + + bool prepare_look_for_matches(bool skip_last); + + /* + The implementations of the methods + - get_next_candidate_for_match + - skip_recurrent_candidate_for_match + - read_next_candidate_for_match + are inherited from the JOIN_CACHE_BNLH class + */ + +public: + + /* + This constructor creates an unlinked BKAH join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables + specified by the 'j' parameter. + The MRR mode initially is set to 'flags'. + */ + JOIN_CACHE_BKAH(JOIN *j, JOIN_TAB *tab, uint flags) + :JOIN_CACHE_BNLH(j, tab), mrr_mode(flags) {} + + /* + This constructor creates a linked BKAH join cache. The cache is to be + used to join table 'tab' to the result of joining the previous tables + specified by the 'j' parameter. The parameter 'prev' specifies the previous + cache object to which this cache is linked. + The MRR mode initially is set to 'flags'. + */ + JOIN_CACHE_BKAH(JOIN *j, JOIN_TAB *tab, uint flags, JOIN_CACHE *prev) + :JOIN_CACHE_BNLH(j, tab, prev), mrr_mode(flags) {} + + uchar **get_curr_association_ptr() { return &curr_matching_chain; } + + /* Initialize the BKAH cache */ + int init(); + + enum Join_algorithm get_join_alg() { return BKAH_JOIN_ALG; } + + /* Check index condition of the joined table for a record from BKAH cache */ + bool skip_index_tuple(char *range_info); }; @@ -1745,6 +2289,10 @@ public: NULL : join_tab+const_tables; } bool setup_subquery_caches(); + bool shrink_join_buffers(JOIN_TAB *jt, + ulonglong curr_space, + ulonglong needed_space); + private: /** TRUE if the query contains an aggregate function but has no GROUP @@ -1966,7 +2514,6 @@ int report_error(TABLE *table, int error); int safe_index_read(JOIN_TAB *tab); COND *remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value); int test_if_item_cache_changed(List<Cached_item> &list); -void calc_used_field_length(THD *thd, JOIN_TAB *join_tab); int join_init_read_record(JOIN_TAB *tab); void set_position(JOIN *join,uint idx,JOIN_TAB *table,KEYUSE *key); inline Item * and_items(Item* cond, Item *item) @@ -1995,7 +2542,8 @@ inline bool optimizer_flag(THD *thd, uint flag) void eliminate_tables(JOIN *join); /* Index Condition Pushdown entry point function */ -void push_index_cond(JOIN_TAB *tab, uint keyno, bool other_tbls_ok); +void push_index_cond(JOIN_TAB *tab, uint keyno, bool other_tbls_ok, + bool factor_out); /**************************************************************************** Temporary table support for SQL Runtime diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc index d10fcb8d31e..f662e794551 100644 --- a/storage/innobase/handler/ha_innodb.cc +++ b/storage/innobase/handler/ha_innodb.cc @@ -6499,6 +6499,7 @@ ha_innobase::info( } stats.check_time = 0; + stats.mrr_length_per_rec= ref_length + 8; // 8 = max(sizeof(void *)); if (stats.records == 0) { stats.mean_rec_length = 0; diff --git a/storage/innodb_plugin/handler/ha_innodb.cc b/storage/innodb_plugin/handler/ha_innodb.cc index 37ce69b9933..d15bf6a1874 100644 --- a/storage/innodb_plugin/handler/ha_innodb.cc +++ b/storage/innodb_plugin/handler/ha_innodb.cc @@ -7669,6 +7669,8 @@ ha_innobase::info( } stats.check_time = 0; + stats.mrr_length_per_rec= ref_length + 8; // 8 = max(sizeof(void *)); + if (stats.records == 0) { stats.mean_rec_length = 0; |