diff options
44 files changed, 4289 insertions, 1812 deletions
diff --git a/mysql-test/include/mix1.inc b/mysql-test/include/mix1.inc index 5befcce2dd5..f12aa4b035e 100644 --- a/mysql-test/include/mix1.inc +++ b/mysql-test/include/mix1.inc @@ -1532,6 +1532,12 @@ INSERT INTO t1 VALUES (1,1,1), (1,1,1), (1,1,2), (1,1,1), (1,1,2); SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; +--echo # MariaDB note: +--echo # This will show 2 for table which has 5 rows. +--echo # This is because the access method employed is actually range access +--echo # which scans 2 records (yes, EXPLAIN displays it incorrectly). +--echo # our correct printing is an artifact of changing in select_describe() +--echo # from printing table->starts.records() to tab->records. EXPLAIN SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; @@ -1545,6 +1551,7 @@ INSERT INTO t1 VALUES (1,1,1), (1,1,1), (1,1,2), (1,1,1), (1,1,2); SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; +--echo # See above "MariaDB note" EXPLAIN SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; @@ -1559,6 +1566,7 @@ INSERT INTO t1 VALUES (1,1,1), (1,1,1), (1,1,2), (1,1,1), (1,1,2); SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; +--echo # See above "MariaDB note" EXPLAIN SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; diff --git a/mysql-test/r/group_by.result b/mysql-test/r/group_by.result index f22a8b0fb55..39f3f5599d0 100644 --- a/mysql-test/r/group_by.result +++ b/mysql-test/r/group_by.result @@ -1543,7 +1543,7 @@ EXPLAIN SELECT 1 FROM t1 WHERE a IN (SELECT a FROM t1 USE INDEX (i2) IGNORE INDEX (i2)); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 index PRIMARY,i2 PRIMARY 4 NULL 144 Using index -1 PRIMARY subselect2 eq_ref unique_key unique_key 4 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 2 SUBQUERY t1 ALL NULL NULL NULL NULL 144 CREATE TABLE t2 (a INT, b INT, KEY(a)); INSERT INTO t2 VALUES (1, 1), (2, 2), (3,3), (4,4); diff --git a/mysql-test/r/group_min_max.result b/mysql-test/r/group_min_max.result index 974521ec120..d899c0cd0fd 100644 --- a/mysql-test/r/group_min_max.result +++ b/mysql-test/r/group_min_max.result @@ -2255,7 +2255,8 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE a IN (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1_outer index NULL a 10 NULL 15 Using where; Using index +1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 8 Using where +1 PRIMARY t1_outer ref a a 5 <subquery2>.max(b) 2 Using index 2 SUBQUERY t1 range NULL a 5 NULL 8 Using index for group-by EXPLAIN SELECT 1 FROM t1 AS t1_outer GROUP BY a HAVING a > (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2); diff --git a/mysql-test/r/metadata.result b/mysql-test/r/metadata.result index 2f9fb6b67f5..e7f4527e080 100644 --- a/mysql-test/r/metadata.result +++ b/mysql-test/r/metadata.result @@ -55,7 +55,7 @@ id data data 2 female no select t1.id from t1 union select t2.id from t2; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr -def id id 1 4 1 Y 32768 0 63 +def id id 1 4 1 Y 49152 0 63 id 1 2 @@ -66,7 +66,7 @@ insert into t1 values (2,'two'); set @arg00=1 ; select @arg00 FROM t1 where a=1 union distinct select 1 FROM t1 where a=1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr -def @arg00 @arg00 8 20 1 Y 32768 0 63 +def @arg00 @arg00 8 20 1 Y 49152 0 63 @arg00 1 select * from (select @arg00) aaa; @@ -76,7 +76,7 @@ def aaa @arg00 @arg00 8 20 1 Y 32768 0 63 1 select 1 union select 1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr -def 1 1 8 20 1 N 32769 0 63 +def 1 1 8 20 1 N 49153 0 63 1 1 select * from (select 1 union select 1) aaa; diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result index de2aeedb91f..f0960b7e4e9 100644 --- a/mysql-test/r/subselect.result +++ b/mysql-test/r/subselect.result @@ -1361,7 +1361,7 @@ 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 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) +1 PRIMARY t1 ref a a 10 test.t2.a,test.t3.a 116 100.00 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`.`t1`.`b` = `test`.`t3`.`a`)) insert into t1 values (3,31); @@ -2831,7 +2831,7 @@ Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<expr_cac explain extended SELECT one,two from t1 where ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = 'N'); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 8 100.00 -1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 1.00 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1 100.00 2 SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`flag` = 'N')) @@ -3420,6 +3420,7 @@ EXPLAIN SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 9 Using where +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 23 test.t1.a,test.t1.b 1 2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort ALTER TABLE t1 ADD INDEX(a); SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a); @@ -3430,7 +3431,8 @@ AAA 8 EXPLAIN SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 9 Using where +1 PRIMARY t1 ALL a NULL NULL NULL 9 Using where +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 23 test.t1.a,test.t1.b 1 2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort DROP TABLE t1; create table t1( f1 int,f2 int); @@ -4320,16 +4322,18 @@ CREATE TABLE t1 (a INT); INSERT INTO t1 VALUES (1),(2); EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 GROUP BY a); 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 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 +1 PRIMARY <subquery2> const distinct_key distinct_key 4 const 1 100.00 2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,1 in ( <materialize> (select 1 from `test`.`t1` group by `test`.`t1`.`a` ), <primary_index_lookup>(1 in <temporary table> on distinct_key where ((1 = `materialized subselect`.`1`)))))) +Note 1003 select 1 AS `1` from <materialize> (select 1 from `test`.`t1` group by `test`.`t1`.`a`) join `test`.`t1` where (`<subquery2>`.`1` = 1) EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 WHERE a > 3 GROUP BY a); 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 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 +1 PRIMARY <subquery2> const distinct_key distinct_key 4 const 1 100.00 2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using where; Using temporary; Using filesort Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,1 in ( <materialize> (select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` ), <primary_index_lookup>(1 in <temporary table> on distinct_key where ((1 = `materialized subselect`.`1`)))))) +Note 1003 select 1 AS `1` from <materialize> (select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a`) join `test`.`t1` where (`<subquery2>`.`1` = 1) DROP TABLE t1; # # Bug#45061: Incorrectly market field caused wrong result. @@ -5002,7 +5006,7 @@ WHERE (ot1.a,ot4.a) IN (SELECT it2.a,it3.a FROM it2,it3); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY ot1 ALL NULL NULL NULL NULL 2 -1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 24 +1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 24 Using where 1 PRIMARY ot4 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join) 2 SUBQUERY it2 ALL NULL NULL NULL NULL 4 2 SUBQUERY it3 ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join) diff --git a/mysql-test/r/subselect3.result b/mysql-test/r/subselect3.result index 78a75776573..9720a586147 100644 --- a/mysql-test/r/subselect3.result +++ b/mysql-test/r/subselect3.result @@ -1023,7 +1023,7 @@ update t22 set c = '2005-12-08 15:58:27' where a = 255; 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 <subquery2> ALL distinct_key NULL NULL NULL 8 Using temporary; Using filesort 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 @@ -1041,7 +1041,7 @@ select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) a id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY X ALL NULL NULL NULL NULL 2 2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where -2 DEPENDENT SUBQUERY subselect3 eq_ref unique_key unique_key 5 func 1 +2 DEPENDENT SUBQUERY <subquery3> eq_ref distinct_key distinct_key 5 func 1 3 SUBQUERY Z ALL NULL NULL NULL NULL 2 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; subq @@ -1112,7 +1112,7 @@ 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 subselect3 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 5 func 1 3 SUBQUERY t1 ALL NULL NULL NULL NULL 20 2 DERIVED t0 ALL NULL NULL NULL NULL 11 drop table t0, t1; @@ -1126,7 +1126,7 @@ 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 t3 ALL NULL NULL NULL NULL 100 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t1 range kp1 kp1 5 NULL 48 Using where; Using index create table t4 (pk int primary key); insert into t4 select a from t3; @@ -1134,7 +1134,7 @@ 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 t3 ALL NULL NULL NULL NULL 100 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t1 range kp1 kp1 5 NULL 48 Using index condition; Using where; Using MRR 2 SUBQUERY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index drop table t1, t3, t4; @@ -1167,7 +1167,7 @@ create table t3 ( a int , filler char(100), key(a)); 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 <subquery2> ALL distinct_key NULL NULL NULL 2 1 PRIMARY t3 ref a a 5 test.t2.a 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where select * from t3 where a in (select a from t2); @@ -1216,22 +1216,25 @@ insert into t3 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t1 A, t1 B, t1 C explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30) and t1.a =3; 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 <subquery2> ALL distinct_key NULL NULL NULL 10 1 PRIMARY t3 ref a a 5 test.t2.a 10 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 (flat, BNL join) +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 test.A.a 1 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 test.t2.a 1 2 SUBQUERY A ALL NULL NULL NULL NULL 10 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 test.t2.a 1 2 SUBQUERY A ALL NULL NULL NULL NULL 10 2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) explain select straight_join * from t2 X, t2 Y @@ -1239,6 +1242,7 @@ 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 (flat, BNL join) +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 test.X.a 1 2 SUBQUERY A ALL NULL NULL NULL NULL 10 2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) create table t0 (a int, b int); @@ -1246,14 +1250,14 @@ 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 <subquery2> ALL distinct_key NULL NULL NULL 10 1 PRIMARY t3 ref a a 5 test.t2.a 10 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 <subquery2> ALL distinct_key NULL NULL NULL 10 1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where 2 SUBQUERY t4 ALL NULL NULL NULL NULL 10 Using where drop table t0,t1,t2,t3,t4; @@ -1265,12 +1269,12 @@ 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 t2 ALL NULL NULL NULL NULL 100 Using where -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t1 ref a a 10 const,test.t2.a 8 Using index 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 t2 ALL NULL NULL NULL NULL 100 Using where -1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1 2 SUBQUERY t1 ref a a 10 const,test.t2.a 8 Using index drop table t1,t2; create table t1 (a int, b int); @@ -1281,14 +1285,14 @@ set @@optimizer_switch='firstmatch=off'; explain select * from t1 where (a,b) in (select a,b from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 10 -1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 100 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); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 10 -1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 100 set @@optimizer_search_depth=@save_optimizer_search_depth; set @@optimizer_switch=@save_optimizer_switch; @@ -1300,7 +1304,7 @@ 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 subselect2 eq_ref unique_key unique_key 3 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1 2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 select * from t0 where a in (select a from t1); a @@ -1314,7 +1318,7 @@ 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 subselect2 eq_ref unique_key unique_key 4 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 select * from t0 where a in (select a from t1); a @@ -1329,7 +1333,7 @@ insert into t2 select * from t2; explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33); 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 15 func,func,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 (flat, BNL join) 2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join) @@ -1402,7 +1406,7 @@ INNER JOIN t2 c ON c.idContact=cona.idContact 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 <subquery2> ALL distinct_key NULL NULL NULL 2 100.00 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 diff --git a/mysql-test/r/subselect3_jcl6.result b/mysql-test/r/subselect3_jcl6.result index f866f1c2aa9..7835865b199 100644 --- a/mysql-test/r/subselect3_jcl6.result +++ b/mysql-test/r/subselect3_jcl6.result @@ -1030,7 +1030,7 @@ update t22 set c = '2005-12-08 15:58:27' where a = 255; 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 <subquery2> ALL distinct_key NULL NULL NULL 8 Using temporary; Using filesort 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 (incremental, BNL join) 2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where @@ -1048,7 +1048,7 @@ select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) a id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY X ALL NULL NULL NULL NULL 2 2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where -2 DEPENDENT SUBQUERY subselect3 eq_ref unique_key unique_key 5 func 1 +2 DEPENDENT SUBQUERY <subquery3> eq_ref distinct_key distinct_key 5 func 1 3 SUBQUERY Z ALL NULL NULL NULL NULL 2 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; subq @@ -1119,7 +1119,7 @@ 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 subselect3 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 5 func 1 3 SUBQUERY t1 ALL NULL NULL NULL NULL 20 2 DERIVED t0 ALL NULL NULL NULL NULL 11 drop table t0, t1; @@ -1133,7 +1133,7 @@ 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 t3 ALL NULL NULL NULL NULL 100 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t1 range kp1 kp1 5 NULL 48 Using where; Using index create table t4 (pk int primary key); insert into t4 select a from t3; @@ -1141,7 +1141,7 @@ 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 t3 ALL NULL NULL NULL NULL 100 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t1 range kp1 kp1 5 NULL 48 Using index condition; Using where; Using MRR 2 SUBQUERY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index drop table t1, t3, t4; @@ -1174,7 +1174,7 @@ create table t3 ( a int , filler char(100), key(a)); 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 <subquery2> ALL distinct_key NULL NULL NULL 2 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); @@ -1223,22 +1223,25 @@ insert into t3 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t1 A, t1 B, t1 C explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30) and t1.a =3; 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 <subquery2> ALL distinct_key NULL NULL NULL 10 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 (flat, BNL join) +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 test.A.a 1 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 test.t2.a 1 2 SUBQUERY A ALL NULL NULL NULL NULL 10 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 test.t2.a 1 2 SUBQUERY A ALL NULL NULL NULL NULL 10 2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) explain select straight_join * from t2 X, t2 Y @@ -1246,6 +1249,7 @@ 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 (flat, BNL join) +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 test.X.a 1 2 SUBQUERY A ALL NULL NULL NULL NULL 10 2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) create table t0 (a int, b int); @@ -1253,14 +1257,14 @@ 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 <subquery2> ALL distinct_key NULL NULL NULL 10 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 <subquery2> ALL distinct_key NULL NULL NULL 10 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; @@ -1272,12 +1276,12 @@ 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 t2 ALL NULL NULL NULL NULL 100 Using where -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t1 ref a a 10 const,test.t2.a 8 Using index 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 t2 ALL NULL NULL NULL NULL 100 Using where -1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1 2 SUBQUERY t1 ref a a 10 const,test.t2.a 8 Using index drop table t1,t2; create table t1 (a int, b int); @@ -1288,14 +1292,14 @@ set @@optimizer_switch='firstmatch=off'; explain select * from t1 where (a,b) in (select a,b from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 10 -1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 100 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); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 10 -1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1 2 SUBQUERY t2 ALL NULL NULL NULL NULL 100 set @@optimizer_search_depth=@save_optimizer_search_depth; set @@optimizer_switch=@save_optimizer_switch; @@ -1307,7 +1311,7 @@ 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 subselect2 eq_ref unique_key unique_key 3 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1 2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 select * from t0 where a in (select a from t1); a @@ -1321,7 +1325,7 @@ 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 subselect2 eq_ref unique_key unique_key 4 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 select * from t0 where a in (select a from t1); a @@ -1336,7 +1340,7 @@ insert into t2 select * from t2; explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33); 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 15 func,func,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 (flat, BNL join) 2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer (incremental, BNL join) @@ -1409,7 +1413,7 @@ INNER JOIN t2 c ON c.idContact=cona.idContact 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 <subquery2> ALL distinct_key NULL NULL NULL 2 100.00 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 Using join buffer (flat, BKA join) diff --git a/mysql-test/r/subselect4.result b/mysql-test/r/subselect4.result index 12585d490a6..a07230cf491 100644 --- a/mysql-test/r/subselect4.result +++ b/mysql-test/r/subselect4.result @@ -345,7 +345,7 @@ FROM t2 WHERE PTYPE = 'Design')); 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) PREPARE stmt FROM "EXPLAIN SELECT EMPNAME @@ -360,13 +360,13 @@ WHERE EMPNUM IN EXECUTE stmt; 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (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 +1 SIMPLE <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) DEALLOCATE PREPARE stmt; @@ -383,7 +383,7 @@ FROM t2 WHERE PTYPE = 'Design')); 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) PREPARE stmt FROM "EXPLAIN SELECT EMPNAME @@ -398,13 +398,13 @@ WHERE EMPNUM IN EXECUTE stmt; 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (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 +1 SIMPLE <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) DEALLOCATE PREPARE stmt; @@ -420,7 +420,7 @@ FROM t2 WHERE PTYPE = 'Design')); 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) PREPARE stmt FROM "EXPLAIN SELECT EMPNAME @@ -435,13 +435,13 @@ WHERE EMPNUM IN EXECUTE stmt; 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (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 +1 SIMPLE <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) DEALLOCATE PREPARE stmt; @@ -568,7 +568,7 @@ FROM t2 WHERE PTYPE = 'Design')); 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) PREPARE stmt FROM "EXPLAIN SELECT EMPNAME @@ -583,13 +583,13 @@ WHERE EMPNUM IN EXECUTE stmt; 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (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 +1 SIMPLE <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) DEALLOCATE PREPARE stmt; @@ -606,7 +606,7 @@ FROM t2 WHERE PTYPE = 'Design')); 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) PREPARE stmt FROM "EXPLAIN SELECT EMPNAME @@ -621,13 +621,13 @@ WHERE EMPNUM IN EXECUTE stmt; 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (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 +1 SIMPLE <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) DEALLOCATE PREPARE stmt; @@ -643,7 +643,7 @@ FROM t2 WHERE PTYPE = 'Design')); 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) PREPARE stmt FROM "EXPLAIN SELECT EMPNAME @@ -658,13 +658,13 @@ WHERE EMPNUM IN EXECUTE stmt; 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 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_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 (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 +1 SIMPLE <subquery2> eq_ref distinct_key distinct_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 (flat, BNL join) DEALLOCATE PREPARE stmt; diff --git a/mysql-test/r/subselect_mat.result b/mysql-test/r/subselect_mat.result index e08872a648b..18227fda620 100644 --- a/mysql-test/r/subselect_mat.result +++ b/mysql-test/r/subselect_mat.result @@ -1,3 +1,5 @@ +set @@optimizer_switch='semijoin=off'; +set optimizer_switch='firstmatch=off'; drop table if exists t1, t2, t3, t1i, t2i, t3i; drop view if exists v1, v2, v1m, v2m; create table t1 (a1 char(8), a2 char(8)); @@ -30,7 +32,6 @@ create index it3i3 on t3i (c1, c2); insert into t1i select * from t1; insert into t2i select * from t2; insert into t3i select * from t3; -set @@optimizer_switch='semijoin=off'; /****************************************************************************** * Simple tests. ******************************************************************************/ @@ -41,7 +42,7 @@ 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 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where Warnings: -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`)))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`)))))) select * from t1 where a1 in (select b1 from t2 where b1 > '0'); a1 a2 1 - 01 2 - 01 @@ -52,7 +53,7 @@ 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 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort Warnings: -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`)))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,`test`.`t1`.`a1` in ( <materialize> (select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`)))))) select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); a1 a2 1 - 01 2 - 01 @@ -63,7 +64,7 @@ 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 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort Warnings: -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`b2`)))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`)))))) select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); a1 a2 1 - 01 2 - 01 @@ -74,7 +75,7 @@ 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 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort Warnings: -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,min(`test`.`t2`.`b2`) from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`min(b2)`)))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,min(`test`.`t2`.`b2`) from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`min(b2)`)))))) select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1); a1 a2 1 - 01 2 - 01 @@ -82,10 +83,10 @@ a1 a2 explain extended select * from t1i where a1 in (select b1 from t2i where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index -2 SUBQUERY t2i index it2i1,it2i3 it2i1 9 NULL 5 100.00 Using where; Using index +1 PRIMARY t1i index NULL _it1_idx # NULL 3 100.00 Using where; +2 SUBQUERY t2i index it2i1,it2i3 it2i1 # NULL 5 100.00 Using where; Warnings: -Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a1`>(<in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`)))))) +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a1`>(<in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`)))))) select * from t1i where a1 in (select b1 from t2i where b1 > '0'); a1 a2 1 - 01 2 - 01 @@ -93,10 +94,10 @@ a1 a2 explain extended select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index -2 SUBQUERY t2i range it2i1,it2i3 it2i1 9 NULL 3 100.00 Using where; Using index for group-by +1 PRIMARY t1i index NULL # 18 # 3 100.00 # +2 SUBQUERY t2i range it2i1,it2i3 # 9 # 3 100.00 # Warnings: -Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a1`>(<in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`)))))) +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a1`>(<in_optimizer>(`test`.`t1i`.`a1`,`test`.`t1i`.`a1` in ( <materialize> (select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`)))))) select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1); a1 a2 1 - 01 2 - 01 @@ -104,10 +105,10 @@ a1 a2 explain extended select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0'); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index -2 SUBQUERY t2i index it2i1,it2i3 it2i3 18 NULL 5 100.00 Using where; Using index +1 PRIMARY t1i index NULL _it1_idx # NULL 3 100.00 Using where; +2 SUBQUERY t2i index it2i1,it2i3 it2i3 # NULL 5 100.00 Using where; Warnings: -Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`b2`)))))) +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`)))))) select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0'); a1 a2 1 - 01 2 - 01 @@ -115,10 +116,10 @@ a1 a2 explain extended select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index -2 SUBQUERY t2i range it2i1,it2i3 it2i3 18 NULL 3 100.00 Using where; Using index for group-by +1 PRIMARY t1i index NULL # # # 3 100.00 # +2 SUBQUERY t2i range it2i1,it2i3 # # # 3 100.00 # Warnings: -Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`,`test`.`t2i`.`b2` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`b2`)))))) +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`,`test`.`t2i`.`b2` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`)))))) select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2); a1 a2 1 - 01 2 - 01 @@ -126,10 +127,10 @@ a1 a2 explain extended select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index -2 SUBQUERY t2i range it2i1,it2i3 it2i3 18 NULL 3 100.00 Using where; Using index for group-by +1 PRIMARY t1i index NULL # # # 3 100.00 # +2 SUBQUERY t2i range it2i1,it2i3 # # # 3 100.00 # Warnings: -Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`min(b2)`)))))) +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`min(b2)`)))))) select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); a1 a2 1 - 01 2 - 01 @@ -140,7 +141,7 @@ 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 SUBQUERY t2i range NULL it2i3 9 NULL 3 100.00 Using index for group-by Warnings: -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,max(`test`.`t2i`.`b2`) from `test`.`t2i` group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`max(b2)`)))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,max(`test`.`t2i`.`b2`) from `test`.`t2i` group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`max(b2)`)))))) select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1); a1 a2 1 - 01 2 - 01 @@ -169,13 +170,14 @@ 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 SUBQUERY t2i range it2i1,it2i3 it2i3 18 NULL 3 100.00 Using where; Using index for group-by Warnings: -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`min(b2)`)))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`min(b2)`)))))) select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 select * from t1 where (a1, a2) in (select b1, min(b2) from t2i limit 1,1); ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery' +set @save_optimizer_switch=@@optimizer_switch; set @@optimizer_switch='default,semijoin=off'; prepare st1 from "select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)"; @@ -202,14 +204,14 @@ execute st1; a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 -set @@optimizer_switch='default,semijoin=off'; +set @@optimizer_switch=@save_optimizer_switch; explain extended select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2); 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 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Warnings: -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` order by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`b2`)))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` order by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`)))))) select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2); a1 a2 1 - 01 2 - 01 @@ -220,7 +222,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index 2 SUBQUERY t2i index NULL it2i3 18 NULL 5 100.00 Using index Warnings: -Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` order by `test`.`t2i`.`b1`,`test`.`t2i`.`b2` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`b2`)))))) +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` order by `test`.`t2i`.`b1`,`test`.`t2i`.`b2` ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`)))))) select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2); a1 a2 1 - 01 2 - 01 @@ -275,7 +277,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 4 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index 2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where Warnings: -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1`.`a2` = `materialized subselect`.`c2`))))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (`test`.`t2`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery4>`.`b1`) and (`test`.`t3`.`c2` = `<subquery4>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery3>`.`c1`) and (`test`.`t1`.`a2` = `<subquery3>`.`c2`))))))) select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and (a1, a2) in (select c1, c2 from t3 @@ -289,12 +291,12 @@ where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and (a1, a2) in (select c1, c2 from t3i where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index -3 SUBQUERY t3i index NULL it3i3 18 NULL 4 100.00 Using where; Using index -4 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index -2 SUBQUERY t2i index it2i1,it2i3 it2i3 18 NULL 5 100.00 Using where; Using index +1 PRIMARY t1i index NULL # # # 3 100.00 # +3 SUBQUERY t3i index NULL # # # 4 100.00 # +4 SUBQUERY t2i index it2i2 # # # 5 100.00 # +2 SUBQUERY t2i index it2i1,it2i3 # # # 5 100.00 # Warnings: -Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`b2`)))))) and <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <expr_cache><`test`.`t3i`.`c2`,`test`.`t3i`.`c1`>(<in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3i`.`c1` in <temporary table> on distinct_key where ((`test`.`t3i`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3i`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`c2`))))))) +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <expr_cache><`test`.`t3i`.`c2`,`test`.`t3i`.`c1`>(<in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3i`.`c1` in <temporary table> on distinct_key where ((`test`.`t3i`.`c1` = `<subquery4>`.`b1`) and (`test`.`t3i`.`c2` = `<subquery4>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery3>`.`c1`) and (`test`.`t1i`.`a2` = `<subquery3>`.`c2`))))))) select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and (a1, a2) in (select c1, c2 from t3i @@ -317,7 +319,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where 3 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><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `materialized subselect`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `materialized subselect`.`c2`))))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1`.`a2` = `materialized subselect`.`c2`))))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery3>`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery6>`.`b1`) and (`test`.`t3`.`c2` = `<subquery6>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery5>`.`c1`) and (`test`.`t1`.`a2` = `<subquery5>`.`c2`))))))) select * from t1 where (a1, a2) in (select b1, b2 from t2 where b2 in (select c2 from t3 where c2 LIKE '%02') or @@ -342,7 +344,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 DEPENDENT SUBQUERY t3a ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1 -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(select 1 from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `materialized subselect`.`c2`))))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where <expr_cache><`test`.`t3c`.`c2`,`test`.`t3c`.`c1`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),(`test`.`t3c`.`c1`,`test`.`t3c`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3c`.`c1` in <temporary table> on distinct_key where ((`test`.`t3c`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3c`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1`.`a2` = `materialized subselect`.`c2`))))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(select 1 from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where <expr_cache><`test`.`t3c`.`c2`,`test`.`t3c`.`c1`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),(`test`.`t3c`.`c1`,`test`.`t3c`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3c`.`c1` in <temporary table> on distinct_key where ((`test`.`t3c`.`c1` = `<subquery6>`.`b1`) and (`test`.`t3c`.`c2` = `<subquery6>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery5>`.`c1`) and (`test`.`t1`.`a2` = `<subquery5>`.`c2`))))))) select * from t1 where (a1, a2) in (select b1, b2 from t2 where b2 in (select c2 from t3 t3a where c1 = a1) or @@ -366,19 +368,19 @@ where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and (a1, a2) in (select c1, c2 from t3i where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))); 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 -5 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where -6 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index -2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort -4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where -3 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where -7 UNION t1i index NULL it1i3 18 NULL 3 100.00 Using where; Using index -9 SUBQUERY t3i index NULL it3i3 18 NULL 4 100.00 Using where; Using index -10 SUBQUERY t2i index it2i2 it2i3 18 NULL 5 100.00 Using where; Using index -8 SUBQUERY t2i index it2i1,it2i3 it2i3 18 NULL 5 100.00 Using where; Using index -NULL UNION RESULT <union1,7> ALL NULL NULL NULL NULL NULL NULL +1 PRIMARY t1 ALL NULL # # # 3 100.00 # +5 SUBQUERY t3 ALL NULL # # # 4 100.00 # +6 SUBQUERY t2i index it2i2 # # # 5 100.00 # +2 SUBQUERY t2 ALL NULL # # # 5 100.00 # +4 SUBQUERY t3 ALL NULL # # # 4 100.00 # +3 SUBQUERY t3 ALL NULL # # # 4 100.00 # +7 UNION t1i index NULL # # # 3 100.00 # +9 SUBQUERY t3i index NULL # # # 4 100.00 # +10 SUBQUERY t2i index it2i2 # # # 5 100.00 # +8 SUBQUERY t2i index it2i1,it2i3 # # # 5 100.00 # +NULL UNION RESULT <union1,7> ALL NULL # # # NULL NULL # Warnings: -Note 1003 (select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `materialized subselect`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `materialized subselect`.`c2`))))))) group by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1`.`a2` = `materialized subselect`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1`.`a2` = `materialized subselect`.`c2`)))))))) union (select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`b2`)))))) and <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <expr_cache><`test`.`t3i`.`c2`,`test`.`t3i`.`c1`>(<in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3i`.`c1` in <temporary table> on distinct_key where ((`test`.`t3i`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3i`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1i`.`a2` = `materialized subselect`.`c2`)))))))) +Note 1003 (select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery3>`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) group by `test`.`t2`.`b1`,`test`.`t2`.`b2` ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`)))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery6>`.`b1`) and (`test`.`t3`.`c2` = `<subquery6>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery5>`.`c1`) and (`test`.`t1`.`a2` = `<subquery5>`.`c2`)))))))) union (select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` where (<expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery8>`.`b1`) and (`test`.`t1i`.`a2` = `<subquery8>`.`b2`)))))) and <expr_cache><`test`.`t1i`.`a2`,`test`.`t1i`.`a1`>(<in_optimizer>((`test`.`t1i`.`a1`,`test`.`t1i`.`a2`),(`test`.`t1i`.`a1`,`test`.`t1i`.`a2`) in ( <materialize> (select `test`.`t3i`.`c1`,`test`.`t3i`.`c2` from `test`.`t3i` where <expr_cache><`test`.`t3i`.`c2`,`test`.`t3i`.`c1`>(<in_optimizer>((`test`.`t3i`.`c1`,`test`.`t3i`.`c2`),(`test`.`t3i`.`c1`,`test`.`t3i`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3i`.`c1` in <temporary table> on distinct_key where ((`test`.`t3i`.`c1` = `<subquery10>`.`b1`) and (`test`.`t3i`.`c2` = `<subquery10>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1i`.`a1` in <temporary table> on distinct_key where ((`test`.`t1i`.`a1` = `<subquery9>`.`c1`) and (`test`.`t1i`.`a2` = `<subquery9>`.`c2`)))))))) (select * from t1 where (a1, a2) in (select b1, b2 from t2 where b2 in (select c2 from t3 where c2 LIKE '%02') or @@ -407,7 +409,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `materialized subselect`.`c1`) and (`test`.`t1`.`a2` = `materialized subselect`.`c2`))))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),(`test`.`t1`.`a1`,`test`.`t1`.`a2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery5>`.`b1`) and (`test`.`t3`.`c2` = `<subquery5>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t1`.`a1` in <temporary table> on distinct_key where ((`test`.`t1`.`a1` = `<subquery4>`.`c1`) and (`test`.`t1`.`a2` = `<subquery4>`.`c2`))))))) select * from t1 where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and (a1, a2) in (select c1, c2 from t3 @@ -430,7 +432,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`c1` = `test`.`t1`.`a1`) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`b1`) and (`test`.`t3`.`c2` = `materialized subselect`.`b2`)))))) ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `materialized subselect`.`c1`) and (`test`.`t3`.`c2` = `materialized subselect`.`c2`))))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`c1` = `test`.`t1`.`a1`) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t3`.`c1`,`test`.`t3`.`c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c2`,`test`.`t3`.`c1`>(<in_optimizer>((`test`.`t3`.`c1`,`test`.`t3`.`c2`),(`test`.`t3`.`c1`,`test`.`t3`.`c2`) in ( <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b2` > '0') ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery5>`.`b1`) and (`test`.`t3`.`c2` = `<subquery5>`.`b2`)))))) ), <primary_index_lookup>(`test`.`t3`.`c1` in <temporary table> on distinct_key where ((`test`.`t3`.`c1` = `<subquery4>`.`c1`) and (`test`.`t3`.`c2` = `<subquery4>`.`c2`))))))) select * from t1, t3 where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and (c1, c2) in (select c1, c2 from t3 @@ -476,7 +478,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra Warnings: Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1 Note 1276 Field or reference 'test.t1.a2' of SELECT #6 was resolved in SELECT #1 -Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(select 1 from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `materialized subselect`.`c2`))))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where (<expr_cache><`test`.`t3c`.`c2`,`test`.`t3c`.`c1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),<exists>(<index_lookup>(<cache>(`test`.`t3c`.`c1`) in t2i on it2i3 where (((`test`.`t2i`.`b2` > '0') or (`test`.`t2i`.`b2` = `test`.`t1`.`a2`)) and (<cache>(`test`.`t3c`.`c1`) = `test`.`t2i`.`b1`) and (<cache>(`test`.`t3c`.`c2`) = `test`.`t2i`.`b2`)))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t3c`.`c1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t3c`.`c2`)))))) +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where (<expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(select 1 from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t3c`.`c1`,`test`.`t3c`.`c2` from `test`.`t3` `t3c` where (<expr_cache><`test`.`t3c`.`c2`,`test`.`t3c`.`c1`,`test`.`t1`.`a2`>(<in_optimizer>((`test`.`t3c`.`c1`,`test`.`t3c`.`c2`),<exists>(<index_lookup>(<cache>(`test`.`t3c`.`c1`) in t2i on it2i3 where (((`test`.`t2i`.`b2` > '0') or (`test`.`t2i`.`b2` = `test`.`t1`.`a2`)) and (<cache>(`test`.`t3c`.`c1`) = `test`.`t2i`.`b1`) and (<cache>(`test`.`t3c`.`c2`) = `test`.`t2i`.`b2`)))))) and (<cache>(`test`.`t1`.`a1`) = `test`.`t3c`.`c1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t3c`.`c2`)))))) explain extended select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01'); id select_type table type possible_keys key key_len ref rows filtered Extra @@ -549,7 +551,6 @@ a1 a2 Test that BLOBs are not materialized (except when arguments of some functions). */ # force materialization to be always considered -set @@optimizer_switch='semijoin=off'; set @prefix_len = 6; set @blob_len = 16; set @suffix_len = @blob_len - @prefix_len; @@ -611,7 +612,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where Warnings: -Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,`test`.`t1_16`.`a1` in ( <materialize> (select substr(`test`.`t2_16`.`b1`,1,16) from `test`.`t2_16` where (`test`.`t2_16`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1_16`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_16`.`a1` = `materialized subselect`.`substring(b1,1,16)`)))))) +Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,`test`.`t1_16`.`a1` in ( <materialize> (select substr(`test`.`t2_16`.`b1`,1,16) from `test`.`t2_16` where (`test`.`t2_16`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1_16`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_16`.`a1` = `<subquery2>`.`substring(b1,1,16)`)))))) select left(a1,7), left(a2,7) from t1_16 where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0'); @@ -640,7 +641,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: -Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,`test`.`t1_16`.`a1` in ( <materialize> (select group_concat(`test`.`t2_16`.`b1` separator ',') from `test`.`t2_16` group by `test`.`t2_16`.`b2` ), <primary_index_lookup>(`test`.`t1_16`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_16`.`a1` = `materialized subselect`.`group_concat(b1)`)))))) +Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,`test`.`t1_16`.`a1` in ( <materialize> (select group_concat(`test`.`t2_16`.`b1` separator ',') from `test`.`t2_16` group by `test`.`t2_16`.`b2` ), <primary_index_lookup>(`test`.`t1_16`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_16`.`a1` = `<subquery2>`.`group_concat(b1)`)))))) select left(a1,7), left(a2,7) from t1_16 where a1 in (select group_concat(b1) from t2_16 group by b2); @@ -662,7 +663,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 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)))))) +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` = `<subquery4>`.`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)))))) drop table t1_16, t2_16, t3_16; set @blob_len = 512; set @suffix_len = @blob_len - @prefix_len; @@ -724,7 +725,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where Warnings: -Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select substr(`test`.`t2_512`.`b1`,1,512) from `test`.`t2_512` where (`test`.`t2_512`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `materialized subselect`.`substring(b1,1,512)`)))))) +Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select substr(`test`.`t2_512`.`b1`,1,512) from `test`.`t2_512` where (`test`.`t2_512`.`b1` > '0') ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `<subquery2>`.`substring(b1,1,512)`)))))) select left(a1,7), left(a2,7) from t1_512 where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0'); @@ -738,7 +739,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: -Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2` ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `materialized subselect`.`group_concat(b1)`)))))) +Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2` ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)`)))))) select left(a1,7), left(a2,7) from t1_512 where a1 in (select group_concat(b1) from t2_512 group by b2); @@ -751,7 +752,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: -Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2` ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `materialized subselect`.`group_concat(b1)`)))))) +Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` where <expr_cache><`test`.`t1_512`.`a1`>(<in_optimizer>(`test`.`t1_512`.`a1`,`test`.`t1_512`.`a1` in ( <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2` ), <primary_index_lookup>(`test`.`t1_512`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)`)))))) select left(a1,7), left(a2,7) from t1_512 where a1 in (select group_concat(b1) from t2_512 group by b2); @@ -831,7 +832,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: -Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` ), <primary_index_lookup>(`test`.`t1_1024`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1024`.`a1` = `materialized subselect`.`group_concat(b1)`)))))) +Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` ), <primary_index_lookup>(`test`.`t1_1024`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)`)))))) select left(a1,7), left(a2,7) from t1_1024 where a1 in (select group_concat(b1) from t2_1024 group by b2); @@ -844,7 +845,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: -Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` ), <primary_index_lookup>(`test`.`t1_1024`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1024`.`a1` = `materialized subselect`.`group_concat(b1)`)))))) +Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2` ), <primary_index_lookup>(`test`.`t1_1024`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)`)))))) select left(a1,7), left(a2,7) from t1_1024 where a1 in (select group_concat(b1) from t2_1024 group by b2); @@ -924,7 +925,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: -Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` ), <primary_index_lookup>(`test`.`t1_1025`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1025`.`a1` = `materialized subselect`.`group_concat(b1)`)))))) +Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` ), <primary_index_lookup>(`test`.`t1_1025`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)`)))))) select left(a1,7), left(a2,7) from t1_1025 where a1 in (select group_concat(b1) from t2_1025 group by b2); @@ -937,7 +938,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using filesort Warnings: -Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` ), <primary_index_lookup>(`test`.`t1_1025`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1025`.`a1` = `materialized subselect`.`group_concat(b1)`)))))) +Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in ( <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2` ), <primary_index_lookup>(`test`.`t1_1025`.`a1` in <temporary table> on distinct_key where ((`test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)`)))))) select left(a1,7), left(a2,7) from t1_1025 where a1 in (select group_concat(b1) from t2_1025 group by b2); @@ -951,7 +952,6 @@ insert into t1bit values (b'010', b'110'); insert into t2bit values (b'001', b'101'); insert into t2bit values (b'010', b'110'); insert into t2bit values (b'110', b'111'); -set @@optimizer_switch='semijoin=off'; explain extended select bin(a1), bin(a2) from t1bit where (a1, a2) in (select b1, b2 from t2bit); @@ -959,7 +959,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1bit ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2bit ALL NULL NULL NULL NULL 3 100.00 Warnings: -Note 1003 select conv(`test`.`t1bit`.`a1`,10,2) AS `bin(a1)`,conv(`test`.`t1bit`.`a2`,10,2) AS `bin(a2)` from `test`.`t1bit` where <expr_cache><`test`.`t1bit`.`a2`,`test`.`t1bit`.`a1`>(<in_optimizer>((`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`),(`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`) in ( <materialize> (select `test`.`t2bit`.`b1`,`test`.`t2bit`.`b2` from `test`.`t2bit` ), <primary_index_lookup>(`test`.`t1bit`.`a1` in <temporary table> on distinct_key where ((`test`.`t1bit`.`a1` = `materialized subselect`.`b1`) and (`test`.`t1bit`.`a2` = `materialized subselect`.`b2`)))))) +Note 1003 select conv(`test`.`t1bit`.`a1`,10,2) AS `bin(a1)`,conv(`test`.`t1bit`.`a2`,10,2) AS `bin(a2)` from `test`.`t1bit` where <expr_cache><`test`.`t1bit`.`a2`,`test`.`t1bit`.`a1`>(<in_optimizer>((`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`),(`test`.`t1bit`.`a1`,`test`.`t1bit`.`a2`) in ( <materialize> (select `test`.`t2bit`.`b1`,`test`.`t2bit`.`b2` from `test`.`t2bit` ), <primary_index_lookup>(`test`.`t1bit`.`a1` in <temporary table> on distinct_key where ((`test`.`t1bit`.`a1` = `<subquery2>`.`b1`) and (`test`.`t1bit`.`a2` = `<subquery2>`.`b2`)))))) select bin(a1), bin(a2) from t1bit where (a1, a2) in (select b1, b2 from t2bit); @@ -994,7 +994,7 @@ drop table t1, t2, t3, t1i, t2i, t3i, columns; /****************************************************************************** * Test the cache of the left operand of IN. ******************************************************************************/ -set @@optimizer_switch='semijoin=off'; +# Test that default values of Cached_item are not used for comparison create table t1 (s1 int); create table t2 (s2 int); insert into t1 values (5),(1),(0); @@ -1030,7 +1030,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where Warnings: -Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `materialized subselect`.`c`)))))) +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`)))))) select a from t1 where a in (select c from t2 where d >= 20); a 2 @@ -1044,7 +1044,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using where; Using index 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where Warnings: -Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `materialized subselect`.`c`)))))) +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`)))))) select a from t1 where a in (select c from t2 where d >= 20); a 2 @@ -1058,7 +1058,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using where; Using index 2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where Warnings: -Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `materialized subselect`.`c`)))))) +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`)))))) select a from t1 where a in (select c from t2 where d >= 20); a 2 @@ -1071,7 +1071,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using index 2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where Warnings: -Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `materialized subselect`.`c`)))))) +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`)))))) select a from t1 group by a having a in (select c from t2 where d >= 20); a 2 @@ -1083,7 +1083,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using index 2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where Warnings: -Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `materialized subselect`.`c`)))))) +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`)))))) select a from t1 group by a having a in (select c from t2 where d >= 20); a 2 @@ -1142,6 +1142,7 @@ id select_type table type possible_keys key key_len ref rows Extra 2 SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found select min(a1) from t1 where 7 in (select b1 from t2 group by b1); min(a1) +set @save_optimizer_switch=@@optimizer_switch; set @@optimizer_switch='default,materialization=off'; explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1); id select_type table type possible_keys key key_len ref rows Extra @@ -1157,17 +1158,25 @@ id select_type table type possible_keys key key_len ref rows Extra select min(a1) from t1 where 7 in (select b1 from t2); min(a1) set @@optimizer_switch='default,materialization=off'; +# with MariaDB and MWL#90, this particular case is solved: explain select min(a1) from t1 where 7 in (select b1 from t2); 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 select min(a1) from t1 where 7 in (select b1 from t2); min(a1) NULL +# but when we go around MWL#90 code, the problem still shows up: +explain select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4; +min(a1) +set @@optimizer_switch= @save_optimizer_switch; drop table t1,t2; create table t1 (a char(2), b varchar(10)); insert into t1 values ('a', 'aaa'); insert into t1 values ('aa', 'aaaa'); -set @@optimizer_switch='default,semijoin=off'; 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 ALL NULL NULL NULL NULL 2 Using where @@ -1187,15 +1196,17 @@ INSERT INTO t1 (f1, f2) VALUES (10, 1.668); CREATE TABLE t2 LIKE t1; INSERT INTO t2 VALUES (1, 1.789); INSERT INTO t2 VALUES (13, 1.454); +set @save_optimizer_switch=@@optimizer_switch; 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 <subquery2> ALL distinct_key NULL NULL NULL 2 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(*) 2 +set @@optimizer_switch= @save_optimizer_switch; DROP TABLE t1, t2; CREATE TABLE t1 ( pk int, @@ -1208,11 +1219,12 @@ PRIMARY KEY (pk) INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff'); CREATE TABLE t2 LIKE t1; INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff'); +set @save_optimizer_switch=@@optimizer_switch; SET @@optimizer_switch='default,semijoin=on,materialization=on'; EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Using MRR SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); pk @@ -1221,6 +1233,7 @@ SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0); pk 2 DROP TABLE t1, t2; +set optimizer_switch=@save_optimizer_switch; # # BUG#50019: Wrong result for IN-subquery with materialization # @@ -1272,6 +1285,34 @@ a a in (select a from t1) 1 0 2 0 drop table t0, t1; +set optimizer_switch='firstmatch=on'; +set @@optimizer_switch=default; +create table t0 (a int); +insert into t0 values (0),(1),(2); +create table t1 (a int); +insert into t1 values (0),(1),(2); +explain select a, a in (select a from t1) from t0; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t0 ALL NULL NULL NULL NULL 3 +2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 +select a, a in (select a from t1) from t0; +a a in (select a from t1) +0 1 +1 1 +2 1 +prepare s from 'select a, a in (select a from t1) from t0'; +execute s; +a a in (select a from t1) +0 1 +1 1 +2 1 +update t1 set a=123; +execute s; +a a in (select a from t1) +0 0 +1 0 +2 0 +drop table t0, t1; # # LPBUG#609121: RQG: wrong result on aggregate + NOT IN + HAVING and # partial_match_table_scan=on @@ -1362,7 +1403,7 @@ SET @@optimizer_switch='default,semijoin=on,materialization=on'; EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Using MRR SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); pk diff --git a/mysql-test/r/subselect_no_mat.result b/mysql-test/r/subselect_no_mat.result index 7aec870308c..dce15f340ea 100644 --- a/mysql-test/r/subselect_no_mat.result +++ b/mysql-test/r/subselect_no_mat.result @@ -1365,7 +1365,7 @@ 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 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) +1 PRIMARY t1 ref a a 10 test.t2.a,test.t3.a 116 100.00 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`.`t1`.`b` = `test`.`t3`.`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 f7ff32ab6d6..f58bb4ab798 100644 --- a/mysql-test/r/subselect_no_semijoin.result +++ b/mysql-test/r/subselect_no_semijoin.result @@ -1300,7 +1300,7 @@ 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 t1 index NULL PRIMARY 4 NULL 4 100.00 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`,`test`.`t2`.`a` in ( <materialize> (select `test`.`t1`.`a` from `test`.`t1` ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `materialized subselect`.`a`)))))) +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` ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `<subquery2>`.`a`)))))) select * from t2 where t2.a in (select a from t1 where t1.b <> 30); a 2 @@ -1310,7 +1310,7 @@ 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 t1 ALL NULL NULL NULL NULL 4 100.00 Using where 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` where (`test`.`t1`.`b` <> 30) ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `materialized subselect`.`a`)))))) +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` where (`test`.`t1`.`b` <> 30) ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `<subquery2>`.`a`)))))) select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); a 2 @@ -1321,7 +1321,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 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 (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`)))))) +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` = `<subquery2>`.`a`)))))) drop table t1, t2, t3; create table t1 (a int, b int, index a (a,b)); create table t2 (a int, index a (a)); @@ -1343,7 +1343,7 @@ 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 t1 index NULL a 10 NULL 10004 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`,`test`.`t2`.`a` in ( <materialize> (select `test`.`t1`.`a` from `test`.`t1` ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `materialized subselect`.`a`)))))) +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` ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `<subquery2>`.`a`)))))) select * from t2 where t2.a in (select a from t1 where t1.b <> 30); a 2 @@ -1353,7 +1353,7 @@ 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 t1 index NULL a 10 NULL 10004 100.00 Using where; 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`,`test`.`t2`.`a` in ( <materialize> (select `test`.`t1`.`a` from `test`.`t1` where (`test`.`t1`.`b` <> 30) ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `materialized subselect`.`a`)))))) +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` where (`test`.`t1`.`b` <> 30) ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `<subquery2>`.`a`)))))) select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); a 2 @@ -1364,7 +1364,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 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 (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`)))))) +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` = `<subquery2>`.`a`)))))) insert into t1 values (3,31); select * from t2 where t2.a in (select a from t1 where t1.b <> 30); a @@ -1380,7 +1380,7 @@ 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 t1 index NULL a 10 NULL 10005 100.00 Using where; 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`,`test`.`t2`.`a` in ( <materialize> (select `test`.`t1`.`a` from `test`.`t1` where (`test`.`t1`.`b` <> 30) ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `materialized subselect`.`a`)))))) +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` where (`test`.`t1`.`b` <> 30) ), <primary_index_lookup>(`test`.`t2`.`a` in <temporary table> on distinct_key where ((`test`.`t2`.`a` = `<subquery2>`.`a`)))))) drop table t0, t1, t2, t3; create table t1 (a int, b int); create table t2 (a int, b int); @@ -2834,7 +2834,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 8 100.00 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where Warnings: -Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two` from `test`.`t1` where <expr_cache><`test`.`t1`.`two`,`test`.`t1`.`one`>(<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),(`test`.`t1`.`one`,`test`.`t1`.`two`) in ( <materialize> (select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where (`test`.`t2`.`flag` = 'N') ), <primary_index_lookup>(`test`.`t1`.`one` in <temporary table> on distinct_key where ((`test`.`t1`.`one` = `materialized subselect`.`one`) and (`test`.`t1`.`two` = `materialized subselect`.`two`)))))) +Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two` from `test`.`t1` where <expr_cache><`test`.`t1`.`two`,`test`.`t1`.`one`>(<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),(`test`.`t1`.`one`,`test`.`t1`.`two`) in ( <materialize> (select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where (`test`.`t2`.`flag` = 'N') ), <primary_index_lookup>(`test`.`t1`.`one` in <temporary table> on distinct_key where ((`test`.`t1`.`one` = `<subquery2>`.`one`) and (`test`.`t1`.`two` = `<subquery2>`.`two`)))))) explain extended SELECT one,two,ROW(one,two) IN (SELECT one,two FROM t2 WHERE flag = '0' group by one,two) as 'test' from t1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 8 100.00 @@ -4323,13 +4323,13 @@ 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 Using where 2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,1 in ( <materialize> (select 1 from `test`.`t1` group by `test`.`t1`.`a` ), <primary_index_lookup>(1 in <temporary table> on distinct_key where ((1 = `materialized subselect`.`1`)))))) +Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,1 in ( <materialize> (select 1 from `test`.`t1` group by `test`.`t1`.`a` ), <primary_index_lookup>(1 in <temporary table> on distinct_key where ((1 = `<subquery2>`.`1`)))))) EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE 1 IN (SELECT 1 FROM t1 WHERE a > 3 GROUP BY a); 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 Using where 2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using where; Using temporary; Using filesort Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,1 in ( <materialize> (select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` ), <primary_index_lookup>(1 in <temporary table> on distinct_key where ((1 = `materialized subselect`.`1`)))))) +Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,1 in ( <materialize> (select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` ), <primary_index_lookup>(1 in <temporary table> on distinct_key where ((1 = `<subquery2>`.`1`)))))) DROP TABLE t1; # # Bug#45061: Incorrectly market field caused wrong result. diff --git a/mysql-test/r/subselect_sj.result b/mysql-test/r/subselect_sj.result index 13f989cc9eb..bcfec8b2c08 100644 --- a/mysql-test/r/subselect_sj.result +++ b/mysql-test/r/subselect_sj.result @@ -811,7 +811,7 @@ INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii','iiii','ffff','ffff','ffff','f EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b 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 subselect2 eq_ref unique_key unique_key 13 func 1 1.00 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 13 func,func 1 100.00 2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using MRR Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`pk` > 0)) @@ -980,7 +980,7 @@ FROM t1 WHERE `varchar_nokey` < 'n' XOR `pk` ) ; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00 -1 PRIMARY subselect2 eq_ref unique_key unique_key 8 func 1 1.00 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1 100.00 2 SUBQUERY t1 ALL varchar_key NULL NULL NULL 15 100.00 Using where Warnings: Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key`) and ((`test`.`t1`.`varchar_key` < 'n') xor `test`.`t1`.`pk`)) @@ -1062,8 +1062,8 @@ 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 subselect3 eq_ref unique_key unique_key 14 func 1 -1 PRIMARY subselect2 eq_ref unique_key unique_key 14 func 1 +1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 14 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 14 func 1 3 SUBQUERY t3 ALL NULL NULL NULL NULL 5 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where SELECT * diff --git a/mysql-test/r/subselect_sj2.result b/mysql-test/r/subselect_sj2.result index 546ab1c6fdd..b87808353fb 100644 --- a/mysql-test/r/subselect_sj2.result +++ b/mysql-test/r/subselect_sj2.result @@ -32,7 +32,7 @@ a b 9 5 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 <subquery2> ALL distinct_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 Using where select * from t2 where b in (select a from t1); @@ -52,7 +52,7 @@ 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 subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 select * from t3 where b in (select a from t1); a b pk1 pk2 pk3 @@ -75,7 +75,7 @@ A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a 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 <subquery2> ALL distinct_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 Using where set @save_ecp= @@engine_condition_pushdown; @@ -102,7 +102,7 @@ set max_heap_table_size= @save_max_heap_table_size; explain select * from t1 where a in (select b from t2); 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 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t2 index b b 5 NULL 10 Using index select * from t1; a b @@ -130,7 +130,7 @@ explain select 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 <subquery2> ALL distinct_key NULL NULL NULL 22 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 @@ -164,7 +164,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY ot ALL NULL NULL NULL NULL 22 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY it ALL NULL NULL NULL NULL 32 select a, mid(filler1, 1,10), length(filler1)=length(filler2) @@ -198,7 +198,7 @@ explain select 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 <subquery2> ALL distinct_key NULL NULL NULL 22 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 @@ -232,7 +232,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY ot ALL NULL NULL NULL NULL 22 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY it ALL NULL NULL NULL NULL 52 select a, mid(filler1, 1,10), length(filler1)=length(filler2) @@ -349,7 +349,7 @@ WHERE t1.Code IN ( SELECT t2.CountryCode FROM t2 WHERE Population > 5000000); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 31 -1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1 2 SUBQUERY t2 ALL CountryCode NULL NULL NULL 545 Using where SELECT Name FROM t1 WHERE t1.Code IN ( @@ -360,6 +360,10 @@ Canada China Czech Republic drop table t1, t2; +drop procedure if exists p1; +drop procedure if exists p2; +drop procedure if exists p3; +drop procedure if exists p4; CREATE TABLE t1(a INT); CREATE TABLE t2(c INT); CREATE PROCEDURE p1(v1 int) @@ -693,7 +697,7 @@ The following must use loose index scan over t3, key a: explain select count(a) 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 index a a 5 NULL 1000 Using index -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t3 index a a 5 NULL 30000 Using index select count(a) from t2 where a in ( SELECT a FROM t3); count(a) diff --git a/mysql-test/r/subselect_sj2_jcl6.result b/mysql-test/r/subselect_sj2_jcl6.result index dcc4716554b..e25f7bd1f91 100644 --- a/mysql-test/r/subselect_sj2_jcl6.result +++ b/mysql-test/r/subselect_sj2_jcl6.result @@ -39,7 +39,7 @@ a b 9 5 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 <subquery2> ALL distinct_key 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); @@ -59,7 +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 subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 select * from t3 where b in (select a from t1); a b pk1 pk2 pk3 @@ -82,7 +82,7 @@ A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a 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 <subquery2> ALL distinct_key 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; @@ -109,7 +109,7 @@ set max_heap_table_size= @save_max_heap_table_size; explain select * from t1 where a in (select b from t2); 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 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t2 index b b 5 NULL 10 Using index select * from t1; a b @@ -137,7 +137,7 @@ explain select 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 <subquery2> ALL distinct_key NULL NULL NULL 22 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 @@ -171,7 +171,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY ot ALL NULL NULL NULL NULL 22 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY it ALL NULL NULL NULL NULL 32 select a, mid(filler1, 1,10), length(filler1)=length(filler2) @@ -205,7 +205,7 @@ explain select 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 <subquery2> ALL distinct_key NULL NULL NULL 22 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 @@ -239,7 +239,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY ot ALL NULL NULL NULL NULL 22 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY it ALL NULL NULL NULL NULL 52 select a, mid(filler1, 1,10), length(filler1)=length(filler2) @@ -356,7 +356,7 @@ WHERE t1.Code IN ( SELECT t2.CountryCode FROM t2 WHERE Population > 5000000); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 31 -1 PRIMARY subselect2 eq_ref unique_key unique_key 3 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1 2 SUBQUERY t2 ALL CountryCode NULL NULL NULL 545 Using where SELECT Name FROM t1 WHERE t1.Code IN ( @@ -367,6 +367,10 @@ Canada China Czech Republic drop table t1, t2; +drop procedure if exists p1; +drop procedure if exists p2; +drop procedure if exists p3; +drop procedure if exists p4; CREATE TABLE t1(a INT); CREATE TABLE t2(c INT); CREATE PROCEDURE p1(v1 int) @@ -702,7 +706,7 @@ The following must use loose index scan over t3, key a: explain select count(a) 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 index a a 5 NULL 1000 Using index -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 2 SUBQUERY t3 index a a 5 NULL 30000 Using index select count(a) from t2 where a in ( SELECT a FROM t3); count(a) diff --git a/mysql-test/r/subselect_sj_jcl6.result b/mysql-test/r/subselect_sj_jcl6.result index e85f0922ec3..6a38dd9842d 100644 --- a/mysql-test/r/subselect_sj_jcl6.result +++ b/mysql-test/r/subselect_sj_jcl6.result @@ -818,7 +818,7 @@ INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii','iiii','ffff','ffff','ffff','f EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b 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 subselect2 eq_ref unique_key unique_key 13 func 1 1.00 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 13 func,func 1 100.00 2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using MRR Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`pk` > 0)) @@ -987,7 +987,7 @@ FROM t1 WHERE `varchar_nokey` < 'n' XOR `pk` ) ; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00 -1 PRIMARY subselect2 eq_ref unique_key unique_key 8 func 1 1.00 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1 100.00 2 SUBQUERY t1 ALL varchar_key NULL NULL NULL 15 100.00 Using where Warnings: Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key`) and ((`test`.`t1`.`varchar_key` < 'n') xor `test`.`t1`.`pk`)) @@ -1069,8 +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 subselect3 eq_ref unique_key unique_key 14 func 1 -1 PRIMARY subselect2 eq_ref unique_key unique_key 14 func 1 +1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 14 func 1 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 14 func 1 3 SUBQUERY t3 ALL NULL NULL NULL NULL 5 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where SELECT * diff --git a/mysql-test/r/subselect_sj_mat.result b/mysql-test/r/subselect_sj_mat.result new file mode 100644 index 00000000000..01f8a3a5cb3 --- /dev/null +++ b/mysql-test/r/subselect_sj_mat.result @@ -0,0 +1,1326 @@ +set optimizer_switch='firstmatch=off'; +drop table if exists t1, t2, t3, t1i, t2i, t3i; +drop view if exists v1, v2, v1m, v2m; +create table t1 (a1 char(8), a2 char(8)); +create table t2 (b1 char(8), b2 char(8)); +create table t3 (c1 char(8), c2 char(8)); +insert into t1 values ('1 - 00', '2 - 00'); +insert into t1 values ('1 - 01', '2 - 01'); +insert into t1 values ('1 - 02', '2 - 02'); +insert into t2 values ('1 - 01', '2 - 01'); +insert into t2 values ('1 - 01', '2 - 01'); +insert into t2 values ('1 - 02', '2 - 02'); +insert into t2 values ('1 - 02', '2 - 02'); +insert into t2 values ('1 - 03', '2 - 03'); +insert into t3 values ('1 - 01', '2 - 01'); +insert into t3 values ('1 - 02', '2 - 02'); +insert into t3 values ('1 - 03', '2 - 03'); +insert into t3 values ('1 - 04', '2 - 04'); +create table t1i (a1 char(8), a2 char(8)); +create table t2i (b1 char(8), b2 char(8)); +create table t3i (c1 char(8), c2 char(8)); +create index it1i1 on t1i (a1); +create index it1i2 on t1i (a2); +create index it1i3 on t1i (a1, a2); +create index it2i1 on t2i (b1); +create index it2i2 on t2i (b2); +create index it2i3 on t2i (b1, b2); +create index it3i1 on t3i (c1); +create index it3i2 on t3i (c2); +create index it3i3 on t3i (c1, c2); +insert into t1i select * from t1; +insert into t2i select * from t2; +insert into t3i select * from t3; +/****************************************************************************** +* Simple tests. +******************************************************************************/ +# non-indexed nullable fields +explain extended +select * from t1 where a1 in (select b1 from t2 where b1 > '0'); +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 <subquery2> eq_ref distinct_key distinct_key 9 func 1 100.00 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`b1` > '0')) +select * from t1 where a1 in (select b1 from t2 where b1 > '0'); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +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 <subquery2> eq_ref distinct_key distinct_key 9 test.t1.a1 1 100.00 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from <materialize> (select `test`.`t2`.`b1` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1`) join `test`.`t1` where (`<subquery2>`.`b1` = `test`.`t1`.`a1`) +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +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 <subquery2> eq_ref distinct_key distinct_key 18 test.t1.a1,test.t1.a2 1 100.00 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1`,`test`.`t2`.`b2`) join `test`.`t1` where ((`<subquery2>`.`b2` = `test`.`t1`.`a2`) and (`<subquery2>`.`b1` = `test`.`t1`.`a1`)) +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1); +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 <subquery2> eq_ref distinct_key distinct_key 18 test.t1.a1,test.t1.a2 1 100.00 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from <materialize> (select `test`.`t2`.`b1`,min(`test`.`t2`.`b2`) from `test`.`t2` where (`test`.`t2`.`b1` > '0') group by `test`.`t2`.`b1`) join `test`.`t1` where ((`<subquery2>`.`min(b2)` = `test`.`t1`.`a2`) and (`<subquery2>`.`b1` = `test`.`t1`.`a1`)) +select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1i where a1 in (select b1 from t2i where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t2i index it2i1,it2i3 it2i1 # NULL 5 40.00 Using where; Using index; LooseScan +1 PRIMARY t1i ref _it1_idx _it1_idx # _ref_ 1 100.00 +Warnings: +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) where ((`test`.`t1i`.`a1` = `test`.`t2i`.`b1`) and (`test`.`t2i`.`b1` > '0')) +select * from t1i where a1 in (select b1 from t2i where b1 > '0'); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY <subquery2> ALL distinct_key # NULL # 3 100.00 # +1 PRIMARY t1i ref it1i1,it1i3 # 9 # 1 100.00 # +2 SUBQUERY t2i range it2i1,it2i3 # 9 # 3 100.00 # +Warnings: +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from <materialize> (select `test`.`t2i`.`b1` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`) join `test`.`t1i` where (`test`.`t1i`.`a1` = `<subquery2>`.`b1`) +select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t2i index it2i1,it2i2,it2i3 it2i3 # NULL 5 40.00 Using where; Using index; LooseScan +1 PRIMARY t1i ref _it1_idx _it1_idx # _ref_ 1 100.00 +Warnings: +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) where ((`test`.`t1i`.`a2` = `test`.`t2i`.`b2`) and (`test`.`t1i`.`a1` = `test`.`t2i`.`b1`) and (`test`.`t2i`.`b1` > '0')) +select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0'); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1i index it1i1,it1i2,it1i3 # # # 3 100.00 # +1 PRIMARY <subquery2> eq_ref distinct_key # # # 1 100.00 # +2 SUBQUERY t2i range it2i1,it2i3 # # # 3 100.00 # +Warnings: +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`,`test`.`t2i`.`b2`) join `test`.`t1i` where ((`<subquery2>`.`b2` = `test`.`t1i`.`a2`) and (`<subquery2>`.`b1` = `test`.`t1i`.`a1`)) +select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1i index it1i1,it1i2,it1i3 # # # 3 100.00 # +1 PRIMARY <subquery2> eq_ref distinct_key # # # 1 100.00 # +2 SUBQUERY t2i range it2i1,it2i3 # # # 3 100.00 # +Warnings: +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`) join `test`.`t1i` where ((`<subquery2>`.`min(b2)` = `test`.`t1i`.`a2`) and (`<subquery2>`.`b1` = `test`.`t1i`.`a1`)) +select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1); +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 <subquery2> eq_ref distinct_key distinct_key 18 test.t1.a1,test.t1.a2 1 100.00 +2 SUBQUERY t2i range NULL it2i3 9 NULL 3 100.00 Using index for group-by +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from <materialize> (select `test`.`t2i`.`b1`,max(`test`.`t2i`.`b2`) from `test`.`t2i` group by `test`.`t2i`.`b1`) join `test`.`t1` where ((`<subquery2>`.`max(b2)` = `test`.`t1`.`a2`) and (`<subquery2>`.`b1` = `test`.`t1`.`a1`)) +select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +prepare st1 from "explain select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)"; +execute st1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 18 test.t1.a1,test.t1.a2 1 +2 SUBQUERY t2i range NULL it2i3 9 NULL 3 Using index for group-by +execute st1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 18 test.t1.a1,test.t1.a2 1 +2 SUBQUERY t2i range NULL it2i3 9 NULL 3 Using index for group-by +prepare st2 from "select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)"; +execute st2; +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +execute st2; +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); +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 <subquery2> eq_ref distinct_key distinct_key 18 test.t1.a1,test.t1.a2 1 100.00 +2 SUBQUERY t2i range it2i1,it2i3 it2i3 18 NULL 3 100.00 Using where; Using index for group-by +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from <materialize> (select `test`.`t2i`.`b1`,min(`test`.`t2i`.`b2`) from `test`.`t2i` where (`test`.`t2i`.`b1` > '0') group by `test`.`t2i`.`b1`) join `test`.`t1` where ((`<subquery2>`.`min(b2)` = `test`.`t1`.`a2`) and (`<subquery2>`.`b1` = `test`.`t1`.`a1`)) +select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +select * from t1 where (a1, a2) in (select b1, min(b2) from t2i limit 1,1); +ERROR 42000: This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery' +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='default,semijoin=off'; +prepare st1 from +"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)"; +set @@optimizer_switch='default,materialization=off'; +execute st1; +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +set @@optimizer_switch='default,semijoin=off'; +execute st1; +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +set @@optimizer_switch='default,materialization=off'; +prepare st1 from +"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)"; +set @@optimizer_switch='default,semijoin=off'; +execute st1; +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +set @@optimizer_switch='default,materialization=off'; +execute st1; +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +set @@optimizer_switch=@save_optimizer_switch; +explain extended +select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2); +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 <subquery2> eq_ref distinct_key distinct_key 18 test.t1.a1,test.t1.a2 1 100.00 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` order by `test`.`t2`.`b1`,`test`.`t2`.`b2`) join `test`.`t1` where ((`<subquery2>`.`b2` = `test`.`t1`.`a2`) and (`<subquery2>`.`b1` = `test`.`t1`.`a1`)) +select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1i index it1i1,it1i2,it1i3 it1i3 18 NULL 3 100.00 Using where; Using index +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 18 test.t1i.a1,test.t1i.a2 1 100.00 +2 SUBQUERY t2i index NULL it2i3 18 NULL 5 100.00 Using index +Warnings: +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from <materialize> (select `test`.`t2i`.`b1`,`test`.`t2i`.`b2` from `test`.`t2i` order by `test`.`t2i`.`b1`,`test`.`t2i`.`b2`) join `test`.`t1i` where ((`<subquery2>`.`b2` = `test`.`t1i`.`a2`) and (`<subquery2>`.`b1` = `test`.`t1i`.`a1`)) +select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +/****************************************************************************** +* Views, UNIONs, several levels of nesting. +******************************************************************************/ +# materialize the result of subquery over temp-table view +create algorithm=merge view v1 as +select b1, c2 from t2, t3 where b2 > c2; +create algorithm=merge view v2 as +select b1, c2 from t2, t3 group by b2, c2; +Warnings: +Warning 1354 View merge algorithm can't be used here for now (assumed undefined algorithm) +create algorithm=temptable view v1m as +select b1, c2 from t2, t3 where b2 > c2; +create algorithm=temptable view v2m as +select b1, c2 from t2, t3 group by b2, c2; +select * from v1 where (c2, b1) in (select c2, b1 from v2 where b1 is not null); +b1 c2 +1 - 02 2 - 01 +1 - 02 2 - 01 +1 - 03 2 - 01 +1 - 03 2 - 02 +select * from v1 where (c2, b1) in (select distinct c2, b1 from v2 where b1 is not null); +b1 c2 +1 - 02 2 - 01 +1 - 02 2 - 01 +1 - 03 2 - 01 +1 - 03 2 - 02 +select * from v1m where (c2, b1) in (select c2, b1 from v2m where b1 is not null); +b1 c2 +1 - 02 2 - 01 +1 - 02 2 - 01 +1 - 03 2 - 01 +1 - 03 2 - 02 +select * from v1m where (c2, b1) in (select distinct c2, b1 from v2m where b1 is not null); +b1 c2 +1 - 02 2 - 01 +1 - 02 2 - 01 +1 - 03 2 - 01 +1 - 03 2 - 02 +drop view v1, v2, v1m, v2m; +explain extended +select * from t1 +where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and +(a1, a2) in (select c1, c2 from t3 +where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +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 <subquery2> eq_ref distinct_key distinct_key 18 func,func 1 100.00 +1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 18 func,func 1 100.00 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where +3 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where +3 SUBQUERY t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer (flat, BNL join) +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3`) where ((`test`.`t2i`.`b2` = `test`.`t3`.`c2`) and (`test`.`t2i`.`b1` = `test`.`t3`.`c1`) and (`test`.`t2`.`b1` > '0') and (`test`.`t3`.`c2` > '0')) +select * from t1 +where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and +(a1, a2) in (select c1, c2 from t3 +where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1i +where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and +(a1, a2) in (select c1, c2 from t3i +where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1i index it1i1,it1i2,it1i3 # # # 3 100.00 # +1 PRIMARY <subquery2> eq_ref distinct_key # # # 1 100.00 # +1 PRIMARY <subquery3> eq_ref distinct_key # # # 1 100.00 # +2 SUBQUERY t2i index it2i1,it2i2,it2i3 # # # 5 100.00 # +3 SUBQUERY t2i index it2i1,it2i2,it2i3 # # # 5 100.00 # +3 SUBQUERY t3i index it3i1,it3i2,it3i3 # # # 4 75.00 # +Warnings: +Note 1003 select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) semi join (`test`.`t2i` join `test`.`t3i`) where ((`test`.`t3i`.`c2` = `test`.`t2i`.`b2`) and (`test`.`t3i`.`c1` = `test`.`t2i`.`b1`) and (`test`.`t2i`.`b1` > '0') and (`test`.`t2i`.`b2` > '0')) +select * from t1i +where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and +(a1, a2) in (select c1, c2 from t3i +where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1 +where (a1, a2) in (select b1, b2 from t2 +where b2 in (select c2 from t3 where c2 LIKE '%02') or +b2 in (select c2 from t3 where c2 LIKE '%03')) and +(a1, a2) in (select c1, c2 from t3 +where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +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 <subquery2> eq_ref distinct_key distinct_key 18 func,func 1 100.00 +1 PRIMARY <subquery5> eq_ref distinct_key distinct_key 18 func,func 1 100.00 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where +5 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where +5 SUBQUERY t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer (flat, BNL join) +4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where +3 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` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3`) where ((`test`.`t2i`.`b2` = `test`.`t3`.`c2`) and (`test`.`t2i`.`b1` = `test`.`t3`.`c1`) and (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery3>`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) and (`test`.`t3`.`c2` > '0')) +select * from t1 +where (a1, a2) in (select b1, b2 from t2 +where b2 in (select c2 from t3 where c2 LIKE '%02') or +b2 in (select c2 from t3 where c2 LIKE '%03')) and +(a1, a2) in (select c1, c2 from t3 +where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +a1 a2 +1 - 02 2 - 02 +explain extended +select * from t1 +where (a1, a2) in (select b1, b2 from t2 +where b2 in (select c2 from t3 t3a where c1 = a1) or +b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and +(a1, a2) in (select c1, c2 from t3 t3c +where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +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 Start temporary +1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +1 PRIMARY <subquery5> eq_ref distinct_key distinct_key 18 func,func 1 100.00 +5 SUBQUERY t3c ALL NULL NULL NULL NULL 4 100.00 Using where +5 SUBQUERY t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer (flat, BNL join) +4 SUBQUERY t3b ALL NULL NULL NULL NULL 4 100.00 Using where +3 DEPENDENT SUBQUERY t3a ALL NULL NULL NULL NULL 4 100.00 Using where +Warnings: +Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1 +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3` `t3c`) where ((`test`.`t2`.`b2` = `test`.`t1`.`a2`) and (`test`.`t2i`.`b2` = `test`.`t3c`.`c2`) and (`test`.`t2`.`b1` = `test`.`t1`.`a1`) and (`test`.`t2i`.`b1` = `test`.`t3c`.`c1`) and (<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(select 1 from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) and (`test`.`t3c`.`c2` > '0')) +select * from t1 +where (a1, a2) in (select b1, b2 from t2 +where b2 in (select c2 from t3 t3a where c1 = a1) or +b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and +(a1, a2) in (select c1, c2 from t3 t3c +where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +(select * from t1 +where (a1, a2) in (select b1, b2 from t2 +where b2 in (select c2 from t3 where c2 LIKE '%02') or +b2 in (select c2 from t3 where c2 LIKE '%03') +group by b1, b2) and +(a1, a2) in (select c1, c2 from t3 +where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))) +UNION +(select * from t1i +where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and +(a1, a2) in (select c1, c2 from t3i +where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY <subquery2> ALL distinct_key # # # 5 0.00 # +1 PRIMARY t3 ALL NULL # # # 4 100.00 # +1 PRIMARY t1 ALL NULL # # # 3 100.00 # +1 PRIMARY t2i ref it2i1,it2i2,it2i3 # # # 2 100.00 # +2 SUBQUERY t2 ALL NULL # # # 5 100.00 # +4 SUBQUERY t3 ALL NULL # # # 4 100.00 # +3 SUBQUERY t3 ALL NULL # # # 4 100.00 # +7 UNION t1i index it1i1,it1i2,it1i3 # # # 3 100.00 # +7 UNION <subquery8> eq_ref distinct_key # # # 1 100.00 # +7 UNION <subquery9> eq_ref distinct_key # # # 1 100.00 # +8 SUBQUERY t2i index it2i1,it2i2,it2i3 # # # 5 100.00 # +9 SUBQUERY t2i index it2i1,it2i2,it2i3 # # # 5 100.00 # +9 SUBQUERY t3i index it3i1,it3i2,it3i3 # # # 4 75.00 # +NULL UNION RESULT <union1,7> ALL NULL # # # NULL NULL # +Warnings: +Note 1003 (select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from <materialize> (select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where (<expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%02') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery3>`.`c2`)))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3`.`c2` from `test`.`t3` where (`test`.`t3`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`))))))) group by `test`.`t2`.`b1`,`test`.`t2`.`b2`) semi join (`test`.`t2i` join `test`.`t3`) join `test`.`t1` where ((`test`.`t3`.`c2` = `<subquery2>`.`b2`) and (`test`.`t1`.`a2` = `<subquery2>`.`b2`) and (`test`.`t2i`.`b2` = `<subquery2>`.`b2`) and (`test`.`t3`.`c1` = `<subquery2>`.`b1`) and (`test`.`t1`.`a1` = `<subquery2>`.`b1`) and (`test`.`t2i`.`b1` = `<subquery2>`.`b1`) and (`<subquery2>`.`b2` > '0'))) union (select `test`.`t1i`.`a1` AS `a1`,`test`.`t1i`.`a2` AS `a2` from `test`.`t1i` semi join (`test`.`t2i`) semi join (`test`.`t2i` join `test`.`t3i`) where ((`test`.`t3i`.`c2` = `test`.`t2i`.`b2`) and (`test`.`t3i`.`c1` = `test`.`t2i`.`b1`) and (`test`.`t2i`.`b1` > '0') and (`test`.`t2i`.`b2` > '0'))) +(select * from t1 +where (a1, a2) in (select b1, b2 from t2 +where b2 in (select c2 from t3 where c2 LIKE '%02') or +b2 in (select c2 from t3 where c2 LIKE '%03') +group by b1, b2) and +(a1, a2) in (select c1, c2 from t3 +where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))) +UNION +(select * from t1i +where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and +(a1, a2) in (select c1, c2 from t3i +where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))); +a1 a2 +1 - 02 2 - 02 +1 - 01 2 - 01 +explain extended +select * from t1 +where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and +(a1, a2) in (select c1, c2 from t3 +where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +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 <subquery4> eq_ref distinct_key distinct_key 18 func,func 1 100.00 +4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where +4 SUBQUERY t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where +3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2i` join `test`.`t3`) where ((`test`.`t2i`.`b2` = `test`.`t3`.`c2`) and (`test`.`t2i`.`b1` = `test`.`t3`.`c1`) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and (`test`.`t3`.`c2` > '0')) +select * from t1 +where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and +(a1, a2) in (select c1, c2 from t3 +where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +explain extended +select * from t1, t3 +where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and +(c1, c2) in (select c1, c2 from t3 +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 (flat, BNL join) +1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 18 func,func 1 100.00 +4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where +4 SUBQUERY t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where +3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t1` semi join (`test`.`t2i` join `test`.`t3`) join `test`.`t3` where ((`test`.`t2i`.`b2` = `test`.`t3`.`c2`) and (`test`.`t3`.`c1` = `test`.`t1`.`a1`) and (`test`.`t2i`.`b1` = `test`.`t3`.`c1`) and <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select `test`.`t1`.`a1`,`test`.`t1`.`a2` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t1`.`a1`) = `test`.`t1`.`a1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t1`.`a2`)) union select `test`.`t2`.`b1`,`test`.`t2`.`b2` from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t1`.`a1`) = `test`.`t2`.`b1`) and (<cache>(`test`.`t1`.`a2`) = `test`.`t2`.`b2`))))) and (`test`.`t3`.`c2` > '0')) +select * from t1, t3 +where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and +(c1, c2) in (select c1, c2 from t3 +where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and +a1 = c1; +a1 a2 c1 c2 +1 - 01 2 - 01 1 - 01 2 - 01 +1 - 02 2 - 02 1 - 02 2 - 02 +/****************************************************************************** +* Negative tests, where materialization should not be applied. +******************************************************************************/ +# UNION in a subquery +explain extended +select * from t3 +where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where +3 DEPENDENT UNION t2 ALL NULL NULL NULL NULL 5 100.00 Using where +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL +Warnings: +Note 1003 select `test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2` from `test`.`t3` where <expr_cache><`test`.`t3`.`c1`>(<in_optimizer>(`test`.`t3`.`c1`,<exists>(select 1 from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t3`.`c1`) = `test`.`t1`.`a1`)) union select 1 from `test`.`t2` where ((`test`.`t2`.`b1` < '9') and (<cache>(`test`.`t3`.`c1`) = `test`.`t2`.`b1`))))) +select * from t3 +where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9'); +c1 c2 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 +explain extended +select * from t1 +where (a1, a2) in (select b1, b2 from t2 +where b2 in (select c2 from t3 t3a where c1 = a1) or +b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and +(a1, a2) in (select c1, c2 from t3 t3c +where (c1, c2) in (select b1, b2 from t2i where b2 > '0' or b2 = a2)); +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; Start temporary +1 PRIMARY t2i ref it2i1,it2i2,it2i3 it2i3 18 test.t1.a1,test.t1.a2 2 100.00 Using index +1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join) +1 PRIMARY t3c ALL NULL NULL NULL NULL 4 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +4 SUBQUERY t3b ALL NULL NULL NULL NULL 4 100.00 Using where +3 DEPENDENT SUBQUERY t3a ALL NULL NULL NULL NULL 4 100.00 Using where +Warnings: +Note 1276 Field or reference 'test.t1.a1' of SELECT #3 was resolved in SELECT #1 +Note 1276 Field or reference 'test.t1.a2' of SELECT #6 was resolved in SELECT #1 +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) semi join (`test`.`t2i` join `test`.`t3` `t3c`) where ((`test`.`t2i`.`b2` = `test`.`t1`.`a2`) and (`test`.`t2`.`b2` = `test`.`t1`.`a2`) and (`test`.`t3c`.`c2` = `test`.`t1`.`a2`) and (`test`.`t2i`.`b1` = `test`.`t1`.`a1`) and (`test`.`t2`.`b1` = `test`.`t1`.`a1`) and (`test`.`t3c`.`c1` = `test`.`t1`.`a1`) and (<expr_cache><`test`.`t2`.`b2`,`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t2`.`b2`,<exists>(select 1 from `test`.`t3` `t3a` where ((`test`.`t3a`.`c1` = `test`.`t1`.`a1`) and (<cache>(`test`.`t2`.`b2`) = `test`.`t3a`.`c2`))))) or <expr_cache><`test`.`t2`.`b2`>(<in_optimizer>(`test`.`t2`.`b2`,`test`.`t2`.`b2` in ( <materialize> (select `test`.`t3b`.`c2` from `test`.`t3` `t3b` where (`test`.`t3b`.`c2` like '%03') ), <primary_index_lookup>(`test`.`t2`.`b2` in <temporary table> on distinct_key where ((`test`.`t2`.`b2` = `<subquery4>`.`c2`)))))))) +explain extended +select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01'); +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 NULL NULL NULL NULL NULL NULL NULL NULL No tables used +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select '1 - 01','2 - 01' having ((<cache>(`test`.`t1`.`a1`) = '1 - 01') and (<cache>(`test`.`t1`.`a2`) = '2 - 01'))))) +select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01'); +a1 a2 +1 - 01 2 - 01 +explain extended +select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual); +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 NULL NULL NULL NULL NULL NULL NULL NULL No tables used +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` where <expr_cache><`test`.`t1`.`a2`,`test`.`t1`.`a1`>(<in_optimizer>((`test`.`t1`.`a1`,`test`.`t1`.`a2`),<exists>(select '1 - 01','2 - 01' having ((<cache>(`test`.`t1`.`a1`) = '1 - 01') and (<cache>(`test`.`t1`.`a2`) = '2 - 01'))))) +select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual); +a1 a2 +1 - 01 2 - 01 +/****************************************************************************** +* Subqueries in other uncovered clauses. +******************************************************************************/ +/* SELECT clause */ +select ((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL from t1; +((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL +0 +0 +0 +/* GROUP BY clause */ +create table columns (col int key); +insert into columns values (1), (2); +explain extended +select * from t1 group by (select col from columns limit 1); +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 +2 SUBQUERY columns index NULL PRIMARY 4 NULL 2 100.00 Using index +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` group by (select `test`.`columns`.`col` from `test`.`columns` limit 1) +select * from t1 group by (select col from columns limit 1); +a1 a2 +1 - 00 2 - 00 +explain extended +select * from t1 group by (a1 in (select col from columns)); +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 temporary; Using filesort +2 DEPENDENT SUBQUERY columns unique_subquery PRIMARY PRIMARY 4 func 1 100.00 Using index; Using where; Full scan on NULL key +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` group by <expr_cache><`test`.`t1`.`a1`>(<in_optimizer>(`test`.`t1`.`a1`,<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a1`) in columns on PRIMARY where trigcond((<cache>(`test`.`t1`.`a1`) = `test`.`columns`.`col`)))))) +select * from t1 group by (a1 in (select col from columns)); +a1 a2 +1 - 00 2 - 00 +/* ORDER BY clause */ +explain extended +select * from t1 order by (select col from columns limit 1); +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 +2 SUBQUERY columns index NULL PRIMARY 4 NULL 2 100.00 Using index +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` order by (select `test`.`columns`.`col` from `test`.`columns` limit 1) +select * from t1 order by (select col from columns limit 1); +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +/****************************************************************************** +* Column types/sizes that affect materialization. +******************************************************************************/ +/* +Test that BLOBs are not materialized (except when arguments of some functions). +*/ +# force materialization to be always considered +set @prefix_len = 6; +set @blob_len = 16; +set @suffix_len = @blob_len - @prefix_len; +create table t1_16 (a1 blob(16), a2 blob(16)); +create table t2_16 (b1 blob(16), b2 blob(16)); +create table t3_16 (c1 blob(16), c2 blob(16)); +insert into t1_16 values +(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); +insert into t1_16 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t1_16 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_16 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t2_16 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_16 values +(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_16 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t3_16 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t3_16 values +(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_16 values +(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); +explain extended select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select b1 from t2_16 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary +1 PRIMARY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +Warnings: +Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` semi join (`test`.`t2_16`) where ((`test`.`t2_16`.`b1` = `test`.`t1_16`.`a1`) and (`test`.`t1_16`.`a1` > '0')) +select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select b1 from t2_16 where b1 > '0'); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +explain extended select left(a1,7), left(a2,7) +from t1_16 +where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary +1 PRIMARY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +Warnings: +Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` semi join (`test`.`t2_16`) where ((`test`.`t2_16`.`b2` = `test`.`t1_16`.`a2`) and (`test`.`t2_16`.`b1` = `test`.`t1_16`.`a1`) and (`test`.`t1_16`.`a1` > '0')) +select left(a1,7), left(a2,7) +from t1_16 +where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0'); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +explain extended select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 20 func 1 100.00 Using where +2 SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where +Warnings: +Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` semi join (`test`.`t2_16`) where ((`test`.`t2_16`.`b1` > '0') and (`test`.`t1_16`.`a1` = substr(`test`.`t2_16`.`b1`,1,16))) +select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0'); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +explain extended select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select group_concat(b1) from t2_16 group by b2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where +2 DEPENDENT SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using filesort +Warnings: +Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` where <expr_cache><`test`.`t1_16`.`a1`>(<in_optimizer>(`test`.`t1_16`.`a1`,<exists>(select group_concat(`test`.`t2_16`.`b1` separator ',') from `test`.`t2_16` group by `test`.`t2_16`.`b2` having (<cache>(`test`.`t1_16`.`a1`) = <ref_null_helper>(group_concat(`test`.`t2_16`.`b1` separator ',')))))) +select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select group_concat(b1) from t2_16 group by b2); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +set @@group_concat_max_len = 256; +explain extended select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select group_concat(b1) from t2_16 group by b2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 261 test.t1_16.a1 1 100.00 Using where +2 SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using filesort +Warnings: +Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from <materialize> (select group_concat(`test`.`t2_16`.`b1` separator ',') from `test`.`t2_16` group by `test`.`t2_16`.`b2`) join `test`.`t1_16` where (`test`.`t1_16`.`a1` = `<subquery2>`.`group_concat(b1)`) +select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select group_concat(b1) from t2_16 group by b2); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +explain extended +select * from t1 +where concat(a1,'x') IN +(select left(a1,8) from t1_16 +where (a1, a2) IN +(select t2_16.b1, t2_16.b2 from t2_16, t2 +where t2.b2 = substring(t2_16.b2,1,6) and +t2.b1 IN (select c1 from t3 where c2 > '0'))); +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 Start temporary +1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) +1 PRIMARY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) +1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer (flat, BNL join) +1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +Warnings: +Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t3` join `test`.`t2_16` join `test`.`t2` join `test`.`t1_16`) where ((`test`.`t2_16`.`b2` = `test`.`t1_16`.`a2`) and (`test`.`t2_16`.`b1` = `test`.`t1_16`.`a1`) and (`test`.`t2`.`b1` = `test`.`t3`.`c1`) and (`test`.`t2`.`b2` = substr(`test`.`t2_16`.`b2`,1,6)) and (`test`.`t3`.`c2` > '0') and (concat(`test`.`t1`.`a1`,'x') = left(`test`.`t1_16`.`a1`,8))) +drop table t1_16, t2_16, t3_16; +set @blob_len = 512; +set @suffix_len = @blob_len - @prefix_len; +create table t1_512 (a1 blob(512), a2 blob(512)); +create table t2_512 (b1 blob(512), b2 blob(512)); +create table t3_512 (c1 blob(512), c2 blob(512)); +insert into t1_512 values +(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); +insert into t1_512 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t1_512 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_512 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t2_512 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_512 values +(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_512 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t3_512 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t3_512 values +(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_512 values +(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); +explain extended select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select b1 from t2_512 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary +1 PRIMARY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +Warnings: +Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` semi join (`test`.`t2_512`) where ((`test`.`t2_512`.`b1` = `test`.`t1_512`.`a1`) and (`test`.`t1_512`.`a1` > '0')) +select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select b1 from t2_512 where b1 > '0'); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +explain extended select left(a1,7), left(a2,7) +from t1_512 +where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary +1 PRIMARY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +Warnings: +Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` semi join (`test`.`t2_512`) where ((`test`.`t2_512`.`b2` = `test`.`t1_512`.`a2`) and (`test`.`t2_512`.`b1` = `test`.`t1_512`.`a1`) and (`test`.`t1_512`.`a1` > '0')) +select left(a1,7), left(a2,7) +from t1_512 +where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0'); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +explain extended select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 517 func 1 100.00 Using where +2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where +Warnings: +Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` semi join (`test`.`t2_512`) where ((`test`.`t2_512`.`b1` > '0') and (`test`.`t1_512`.`a1` = substr(`test`.`t2_512`.`b1`,1,512))) +select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0'); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +explain extended select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select group_concat(b1) from t2_512 group by b2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 261 test.t1_512.a1 1 100.00 Using where +2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using filesort +Warnings: +Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2`) join `test`.`t1_512` where (`test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)`) +select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select group_concat(b1) from t2_512 group by b2); +left(a1,7) left(a2,7) +set @@group_concat_max_len = 256; +explain extended select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select group_concat(b1) from t2_512 group by b2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00 Using where +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 261 test.t1_512.a1 1 100.00 Using where +2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using filesort +Warnings: +Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from <materialize> (select group_concat(`test`.`t2_512`.`b1` separator ',') from `test`.`t2_512` group by `test`.`t2_512`.`b2`) join `test`.`t1_512` where (`test`.`t1_512`.`a1` = `<subquery2>`.`group_concat(b1)`) +select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select group_concat(b1) from t2_512 group by b2); +left(a1,7) left(a2,7) +drop table t1_512, t2_512, t3_512; +set @blob_len = 1024; +set @suffix_len = @blob_len - @prefix_len; +create table t1_1024 (a1 blob(1024), a2 blob(1024)); +create table t2_1024 (b1 blob(1024), b2 blob(1024)); +create table t3_1024 (c1 blob(1024), c2 blob(1024)); +insert into t1_1024 values +(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); +insert into t1_1024 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t1_1024 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_1024 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t2_1024 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_1024 values +(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_1024 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t3_1024 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t3_1024 values +(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_1024 values +(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); +explain extended select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select b1 from t2_1024 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary +1 PRIMARY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +Warnings: +Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` semi join (`test`.`t2_1024`) where ((`test`.`t2_1024`.`b1` = `test`.`t1_1024`.`a1`) and (`test`.`t1_1024`.`a1` > '0')) +select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select b1 from t2_1024 where b1 > '0'); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +explain extended select left(a1,7), left(a2,7) +from t1_1024 +where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary +1 PRIMARY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +Warnings: +Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` semi join (`test`.`t2_1024`) where ((`test`.`t2_1024`.`b2` = `test`.`t1_1024`.`a2`) and (`test`.`t2_1024`.`b1` = `test`.`t1_1024`.`a1`) and (`test`.`t1_1024`.`a1` > '0')) +select left(a1,7), left(a2,7) +from t1_1024 +where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0'); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +explain extended select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 +1 PRIMARY <subquery2> eq_ref NULL distinct_key 15 func,func 1 100.00 Using where +2 SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where +Warnings: +Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` semi join (`test`.`t2_1024`) where ((`test`.`t2_1024`.`b1` > '0') and (`test`.`t1_1024`.`a1` = substr(`test`.`t2_1024`.`b1`,1,1024))) +select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0'); +left(a1,7) left(a2,7) +explain extended select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select group_concat(b1) from t2_1024 group by b2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 261 test.t1_1024.a1 1 100.00 Using where +2 SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using filesort +Warnings: +Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2`) join `test`.`t1_1024` where (`test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)`) +select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select group_concat(b1) from t2_1024 group by b2); +left(a1,7) left(a2,7) +set @@group_concat_max_len = 256; +explain extended select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select group_concat(b1) from t2_1024 group by b2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00 Using where +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 261 test.t1_1024.a1 1 100.00 Using where +2 SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using filesort +Warnings: +Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from <materialize> (select group_concat(`test`.`t2_1024`.`b1` separator ',') from `test`.`t2_1024` group by `test`.`t2_1024`.`b2`) join `test`.`t1_1024` where (`test`.`t1_1024`.`a1` = `<subquery2>`.`group_concat(b1)`) +select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select group_concat(b1) from t2_1024 group by b2); +left(a1,7) left(a2,7) +drop table t1_1024, t2_1024, t3_1024; +set @blob_len = 1025; +set @suffix_len = @blob_len - @prefix_len; +create table t1_1025 (a1 blob(1025), a2 blob(1025)); +create table t2_1025 (b1 blob(1025), b2 blob(1025)); +create table t3_1025 (c1 blob(1025), c2 blob(1025)); +insert into t1_1025 values +(concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); +insert into t1_1025 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t1_1025 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_1025 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t2_1025 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_1025 values +(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_1025 values +(concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t3_1025 values +(concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t3_1025 values +(concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_1025 values +(concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); +explain extended select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select b1 from t2_1025 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary +1 PRIMARY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +Warnings: +Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` semi join (`test`.`t2_1025`) where ((`test`.`t2_1025`.`b1` = `test`.`t1_1025`.`a1`) and (`test`.`t1_1025`.`a1` > '0')) +select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select b1 from t2_1025 where b1 > '0'); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +explain extended select left(a1,7), left(a2,7) +from t1_1025 +where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where; Start temporary +1 PRIMARY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +Warnings: +Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` semi join (`test`.`t2_1025`) where ((`test`.`t2_1025`.`b2` = `test`.`t1_1025`.`a2`) and (`test`.`t2_1025`.`b1` = `test`.`t1_1025`.`a1`) and (`test`.`t1_1025`.`a1` > '0')) +select left(a1,7), left(a2,7) +from t1_1025 +where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0'); +left(a1,7) left(a2,7) +1 - 01x 2 - 01x +1 - 02x 2 - 02x +explain extended select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 +1 PRIMARY <subquery2> eq_ref NULL distinct_key 15 func,func 1 100.00 Using where +2 SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where +Warnings: +Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` semi join (`test`.`t2_1025`) where ((`test`.`t2_1025`.`b1` > '0') and (`test`.`t1_1025`.`a1` = substr(`test`.`t2_1025`.`b1`,1,1025))) +select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0'); +left(a1,7) left(a2,7) +explain extended select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select group_concat(b1) from t2_1025 group by b2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 261 test.t1_1025.a1 1 100.00 Using where +2 SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using filesort +Warnings: +Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2`) join `test`.`t1_1025` where (`test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)`) +select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select group_concat(b1) from t2_1025 group by b2); +left(a1,7) left(a2,7) +set @@group_concat_max_len = 256; +explain extended select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select group_concat(b1) from t2_1025 group by b2); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00 Using where +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 261 test.t1_1025.a1 1 100.00 Using where +2 SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using filesort +Warnings: +Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from <materialize> (select group_concat(`test`.`t2_1025`.`b1` separator ',') from `test`.`t2_1025` group by `test`.`t2_1025`.`b2`) join `test`.`t1_1025` where (`test`.`t1_1025`.`a1` = `<subquery2>`.`group_concat(b1)`) +select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select group_concat(b1) from t2_1025 group by b2); +left(a1,7) left(a2,7) +drop table t1_1025, t2_1025, t3_1025; +create table t1bit (a1 bit(3), a2 bit(3)); +create table t2bit (b1 bit(3), b2 bit(3)); +insert into t1bit values (b'000', b'100'); +insert into t1bit values (b'001', b'101'); +insert into t1bit values (b'010', b'110'); +insert into t2bit values (b'001', b'101'); +insert into t2bit values (b'010', b'110'); +insert into t2bit values (b'110', b'111'); +explain extended select bin(a1), bin(a2) +from t1bit +where (a1, a2) in (select b1, b2 from t2bit); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1bit ALL NULL NULL NULL NULL 3 100.00 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1 100.00 +2 SUBQUERY t2bit ALL NULL NULL NULL NULL 3 100.00 +Warnings: +Note 1003 select conv(`test`.`t1bit`.`a1`,10,2) AS `bin(a1)`,conv(`test`.`t1bit`.`a2`,10,2) AS `bin(a2)` from `test`.`t1bit` semi join (`test`.`t2bit`) where 1 +select bin(a1), bin(a2) +from t1bit +where (a1, a2) in (select b1, b2 from t2bit); +bin(a1) bin(a2) +1 101 +10 110 +drop table t1bit, t2bit; +create table t1bb (a1 bit(3), a2 blob(3)); +create table t2bb (b1 bit(3), b2 blob(3)); +insert into t1bb values (b'000', '100'); +insert into t1bb values (b'001', '101'); +insert into t1bb values (b'010', '110'); +insert into t2bb values (b'001', '101'); +insert into t2bb values (b'010', '110'); +insert into t2bb values (b'110', '111'); +explain extended select bin(a1), a2 +from t1bb +where (a1, a2) in (select b1, b2 from t2bb); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1bb ALL NULL NULL NULL NULL 3 100.00 Start temporary +1 PRIMARY t2bb ALL NULL NULL NULL NULL 3 100.00 Using where; End temporary; Using join buffer (flat, BNL join) +Warnings: +Note 1003 select conv(`test`.`t1bb`.`a1`,10,2) AS `bin(a1)`,`test`.`t1bb`.`a2` AS `a2` from `test`.`t1bb` semi join (`test`.`t2bb`) where ((`test`.`t2bb`.`b2` = `test`.`t1bb`.`a2`) and (`test`.`t2bb`.`b1` = `test`.`t1bb`.`a1`)) +select bin(a1), a2 +from t1bb +where (a1, a2) in (select b1, b2 from t2bb); +bin(a1) a2 +1 101 +10 110 +drop table t1bb, t2bb; +drop table t1, t2, t3, t1i, t2i, t3i, columns; +/****************************************************************************** +* Test the cache of the left operand of IN. +******************************************************************************/ +# Test that default values of Cached_item are not used for comparison +create table t1 (s1 int); +create table t2 (s2 int); +insert into t1 values (5),(1),(0); +insert into t2 values (0), (1); +select s2 from t2 where s2 in (select s1 from t1); +s2 +0 +1 +drop table t1, t2; +create table t1 (a int not null, b int not null); +create table t2 (c int not null, d int not null); +create table t3 (e int not null); +insert into t1 values (1,10); +insert into t1 values (1,20); +insert into t1 values (2,10); +insert into t1 values (2,20); +insert into t1 values (2,30); +insert into t1 values (3,20); +insert into t1 values (4,40); +insert into t2 values (2,10); +insert into t2 values (2,20); +insert into t2 values (2,40); +insert into t2 values (3,20); +insert into t2 values (4,10); +insert into t2 values (5,10); +insert into t3 values (10); +insert into t3 values (10); +insert into t3 values (20); +insert into t3 values (30); +explain extended +select a from t1 where a in (select c from t2 where d >= 20); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 6 100.00 +1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; Using join buffer (flat, BNL join) +2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where +Warnings: +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t1`.`a` = `test`.`t2`.`c`) and (`test`.`t2`.`d` >= 20)) +select a from t1 where a in (select c from t2 where d >= 20); +a +2 +2 +2 +3 +create index it1a on t1(a); +explain extended +select a from t1 where a in (select c from t2 where d >= 20); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 6 100.00 +1 PRIMARY t1 ref it1a it1a 4 test.t2.c 2 100.00 Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where +Warnings: +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t1`.`a` = `test`.`t2`.`c`) and (`test`.`t2`.`d` >= 20)) +select a from t1 where a in (select c from t2 where d >= 20); +a +2 +2 +2 +3 +insert into t2 values (1,10); +explain extended +select a from t1 where a in (select c from t2 where d >= 20); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1 index it1a it1a 4 NULL 7 100.00 Using index +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where +Warnings: +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`d` >= 20)) +select a from t1 where a in (select c from t2 where d >= 20); +a +2 +2 +2 +3 +explain extended +select a from t1 group by a having a in (select c from t2 where d >= 20); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where +Warnings: +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`)))))) +select a from t1 group by a having a in (select c from t2 where d >= 20); +a +2 +3 +create index iab on t1(a, b); +explain extended +select a from t1 group by a having a in (select c from t2 where d >= 20); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1 index NULL it1a 4 NULL 7 100.00 Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where +Warnings: +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (select `test`.`t2`.`c` from `test`.`t2` where (`test`.`t2`.`d` >= 20) ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where ((`test`.`t1`.`a` = `<subquery2>`.`c`)))))) +select a from t1 group by a having a in (select c from t2 where d >= 20); +a +2 +3 +explain extended +select a from t1 group by a +having a in (select c from t2 where d >= some(select e from t3 where max(b)=e)); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1 index NULL iab 8 NULL 7 100.00 Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where +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 +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` group by `test`.`t1`.`a` having <expr_cache><`test`.`t1`.`a`,max(`test`.`t1`.`b`)>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` where (<nop>(<expr_cache><`test`.`t2`.`d`,max(`test`.`t1`.`b`)>(<in_optimizer>(`test`.`t2`.`d`,<exists>(select `test`.`t3`.`e` from `test`.`t3` where (max(`test`.`t1`.`b`) = `test`.`t3`.`e`) having (<cache>(`test`.`t2`.`d`) >= <ref_null_helper>(`test`.`t3`.`e`)))))) and (<cache>(`test`.`t1`.`a`) = `test`.`t2`.`c`))))) +select a from t1 group by a +having a in (select c from t2 where d >= some(select e from t3 where max(b)=e)); +a +2 +3 +explain extended +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 7 100.00 Start temporary +1 PRIMARY t1 ref it1a,iab iab 4 test.t2.c 1 100.00 Using where; Using index; End temporary +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 +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t1`.`a` = `test`.`t2`.`c`) and <nop>(<expr_cache><`test`.`t2`.`d`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t2`.`d`,<exists>(select 1 from `test`.`t3` where ((`test`.`t1`.`b` = `test`.`t3`.`e`) and (<cache>(`test`.`t2`.`d`) >= `test`.`t3`.`e`))))))) +select a from t1 +where a in (select c from t2 where d >= some(select e from t3 where b=e)); +a +2 +2 +2 +3 +1 +drop table t1, t2, t3; +create table t2 (a int, b int, key(a), key(b)); +insert into t2 values (3,3),(3,3),(3,3); +select 1 from t2 where +t2.a > 1 +or +t2.a = 3 and not t2.a not in (select t2.b from t2); +1 +1 +1 +1 +drop table t2; +create table t1 (a1 int key); +create table t2 (b1 int); +insert into t1 values (5); +explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 system NULL NULL NULL NULL 1 +1 PRIMARY <subquery2> const distinct_key distinct_key 5 const 1 +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL no matching row in const table +select min(a1) from t1 where 7 in (select b1 from t2 group by b1); +min(a1) +NULL +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='default,materialization=off'; +explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +2 DEPENDENT SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found +select min(a1) from t1 where 7 in (select b1 from t2 group by b1); +min(a1) +set @@optimizer_switch='default,semijoin=off'; +explain select min(a1) from t1 where 7 in (select b1 from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +2 SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found +select min(a1) from t1 where 7 in (select b1 from t2); +min(a1) +set @@optimizer_switch='default,materialization=off'; +# with MariaDB and MWL#90, this particular case is solved: +explain select min(a1) from t1 where 7 in (select b1 from t2); +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 +select min(a1) from t1 where 7 in (select b1 from t2); +min(a1) +NULL +# but when we go around MWL#90 code, the problem still shows up: +explain select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4; +min(a1) +set @@optimizer_switch= @save_optimizer_switch; +drop table t1,t2; +create table t1 (a char(2), b varchar(10)); +insert into t1 values ('a', 'aaa'); +insert into t1 values ('aa', 'aaaa'); +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 ALL NULL NULL NULL NULL 2 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1 Using where +2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 +select a,b from t1 where b in (select a from t1); +a b +prepare st1 from "select a,b from t1 where b in (select a from t1)"; +execute st1; +a b +execute st1; +a b +drop table t1; +CREATE TABLE t1 (f1 INT, f2 DECIMAL(5,3)) ENGINE=MyISAM; +INSERT INTO t1 (f1, f2) VALUES (1, 1.789); +INSERT INTO t1 (f1, f2) VALUES (13, 1.454); +INSERT INTO t1 (f1, f2) VALUES (10, 1.668); +CREATE TABLE t2 LIKE t1; +INSERT INTO t2 VALUES (1, 1.789); +INSERT INTO t2 VALUES (13, 1.454); +set @save_optimizer_switch=@@optimizer_switch; +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 <subquery2> ALL distinct_key NULL NULL NULL 2 +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(*) +2 +set @@optimizer_switch= @save_optimizer_switch; +DROP TABLE t1, t2; +CREATE TABLE t1 ( +pk int, +a varchar(1), +b varchar(4), +c varchar(4), +d varchar(4), +PRIMARY KEY (pk) +); +INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff'); +CREATE TABLE t2 LIKE t1; +INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff'); +set @save_optimizer_switch=@@optimizer_switch; +SET @@optimizer_switch='default,semijoin=on,materialization=on'; +EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1 +2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Using MRR +SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); +pk +2 +SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0); +pk +2 +DROP TABLE t1, t2; +set optimizer_switch=@save_optimizer_switch; +# +# BUG#50019: Wrong result for IN-subquery with materialization +# +create table t1(i int); +insert into t1 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); +create table t2(i int); +insert into t2 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); +create table t3(i int); +insert into t3 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); +select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5); +i +1 +2 +3 +4 +set @save_optimizer_switch=@@optimizer_switch; +set session optimizer_switch='materialization=off'; +select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5); +i +4 +3 +2 +1 +set session optimizer_switch=@save_optimizer_switch; +drop table t1, t2, t3; +create table t0 (a int); +insert into t0 values (0),(1),(2); +create table t1 (a int); +insert into t1 values (0),(1),(2); +explain select a, a in (select a from t1) from t0; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t0 ALL NULL NULL NULL NULL 3 +2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 +select a, a in (select a from t1) from t0; +a a in (select a from t1) +0 1 +1 1 +2 1 +prepare s from 'select a, a in (select a from t1) from t0'; +execute s; +a a in (select a from t1) +0 1 +1 1 +2 1 +update t1 set a=123; +execute s; +a a in (select a from t1) +0 0 +1 0 +2 0 +drop table t0, t1; +set optimizer_switch='firstmatch=on'; diff --git a/mysql-test/suite/innodb/r/innodb_mysql.result b/mysql-test/suite/innodb/r/innodb_mysql.result index f36a4b2b0ea..7d9807f6681 100644 --- a/mysql-test/suite/innodb/r/innodb_mysql.result +++ b/mysql-test/suite/innodb/r/innodb_mysql.result @@ -1735,12 +1735,18 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; 1 1 +# MariaDB note: +# This will show 2 for table which has 5 rows. +# This is because the access method employed is actually range access +# which scans 2 records (yes, EXPLAIN displays it incorrectly). +# our correct printing is an artifact of changing in select_describe() +# from printing table->starts.records() to tab->records. EXPLAIN SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> system NULL NULL NULL NULL 1 -2 DERIVED t1 index c3,c2 c2 10 NULL 5 +2 DERIVED t1 index c3,c2 c2 10 NULL 2 DROP TABLE t1; CREATE TABLE t1 (c1 REAL, c2 REAL, c3 REAL, KEY (c3), KEY (c2, c3)) ENGINE=InnoDB; @@ -1749,12 +1755,13 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; 1 1 +# See above "MariaDB note" EXPLAIN SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> system NULL NULL NULL NULL 1 -2 DERIVED t1 index c3,c2 c2 18 NULL 5 +2 DERIVED t1 index c3,c2 c2 18 NULL 2 DROP TABLE t1; CREATE TABLE t1 (c1 DECIMAL(12,2), c2 DECIMAL(12,2), c3 DECIMAL(12,2), KEY (c3), KEY (c2, c3)) @@ -1764,12 +1771,13 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; 1 1 +# See above "MariaDB note" EXPLAIN SELECT 1 FROM (SELECT COUNT(DISTINCT c1) FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> system NULL NULL NULL NULL 1 -2 DERIVED t1 index c3,c2 c2 14 NULL 5 +2 DERIVED t1 index c3,c2 c2 14 NULL 2 DROP TABLE t1; End of 5.1 tests drop table if exists t1, t2, t3; diff --git a/mysql-test/suite/pbxt/r/group_min_max.result b/mysql-test/suite/pbxt/r/group_min_max.result index e4ba16ce527..207dfd466ea 100644 --- a/mysql-test/suite/pbxt/r/group_min_max.result +++ b/mysql-test/suite/pbxt/r/group_min_max.result @@ -2256,7 +2256,8 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE a IN (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1_outer index NULL a 10 NULL 15 Using where; Using index +1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 15 +1 PRIMARY t1_outer ref a a 5 <subquery2>.max(b) 1 Using index 2 SUBQUERY t1 index NULL a 10 NULL 15 Using index EXPLAIN SELECT 1 FROM t1 AS t1_outer GROUP BY a HAVING a > (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2); diff --git a/mysql-test/suite/pbxt/r/metadata.result b/mysql-test/suite/pbxt/r/metadata.result index c46c6e26ce4..b2a8acd8e9b 100644 --- a/mysql-test/suite/pbxt/r/metadata.result +++ b/mysql-test/suite/pbxt/r/metadata.result @@ -55,7 +55,7 @@ id data data 2 female no select t1.id from t1 union select t2.id from t2; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr -def id id 1 4 1 Y 32768 0 63 +def id id 1 4 1 Y 49152 0 63 id 1 2 @@ -66,7 +66,7 @@ insert into t1 values (2,'two'); set @arg00=1 ; select @arg00 FROM t1 where a=1 union distinct select 1 FROM t1 where a=1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr -def @arg00 @arg00 8 20 1 Y 32768 0 63 +def @arg00 @arg00 8 20 1 Y 49152 0 63 @arg00 1 select * from (select @arg00) aaa; @@ -76,7 +76,7 @@ def aaa @arg00 @arg00 8 20 1 Y 32768 0 63 1 select 1 union select 1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr -def 1 1 8 20 1 N 32769 0 63 +def 1 1 8 20 1 N 49153 0 63 1 1 select * from (select 1 union select 1) aaa; diff --git a/mysql-test/suite/pbxt/r/subselect.result b/mysql-test/suite/pbxt/r/subselect.result index efa7b548122..e64960dcaa5 100644 --- a/mysql-test/suite/pbxt/r/subselect.result +++ b/mysql-test/suite/pbxt/r/subselect.result @@ -3421,18 +3421,20 @@ AAA 8 EXPLAIN SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 9 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 9 +1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 23 test.t1.a,test.t1.b 1 2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort ALTER TABLE t1 ADD INDEX(a); SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a); a b +AAA 8 BBB 4 CCC 7 -AAA 8 EXPLAIN SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 9 Using where +1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 9 +1 PRIMARY t1 ref a a 8 <subquery2>.a 1 Using where 2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort DROP TABLE t1; create table t1( f1 int,f2 int); diff --git a/mysql-test/suite/vcol/inc/vcol_view.inc b/mysql-test/suite/vcol/inc/vcol_view.inc index 2bf413e2471..64149a7bb31 100644 --- a/mysql-test/suite/vcol/inc/vcol_view.inc +++ b/mysql-test/suite/vcol/inc/vcol_view.inc @@ -69,10 +69,14 @@ create table t1 (a int not null, insert into t1 (a) values (1), (2), (3), (4); create view v1 as select b+1 from t1 order by 1 desc limit 2; select * from v1; +--echo MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1. +--echo MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed explain select * from v1; drop view v1; create view v1 as select c+1 from t1 order by 1 desc limit 2; select * from v1; +--echo MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1. +--echo MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed explain select * from v1; drop view v1; drop table t1; diff --git a/mysql-test/suite/vcol/r/vcol_view_innodb.result b/mysql-test/suite/vcol/r/vcol_view_innodb.result index ae834722606..3447fd5b4df 100644 --- a/mysql-test/suite/vcol/r/vcol_view_innodb.result +++ b/mysql-test/suite/vcol/r/vcol_view_innodb.result @@ -103,20 +103,24 @@ select * from v1; b+1 0 -1 +MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1. +MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed explain select * from v1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 -2 DERIVED t1 ALL NULL NULL NULL NULL 4 Using filesort +2 DERIVED t1 ALL NULL NULL NULL NULL 2 Using filesort drop view v1; create view v1 as select c+1 from t1 order by 1 desc limit 2; select * from v1; c+1 0 -1 +MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1. +MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed explain select * from v1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 -2 DERIVED t1 ALL NULL NULL NULL NULL 4 Using filesort +2 DERIVED t1 ALL NULL NULL NULL NULL 2 Using filesort drop view v1; drop table t1; create table t1 (a int, diff --git a/mysql-test/suite/vcol/r/vcol_view_myisam.result b/mysql-test/suite/vcol/r/vcol_view_myisam.result index bd5999792ff..6275685e7f4 100644 --- a/mysql-test/suite/vcol/r/vcol_view_myisam.result +++ b/mysql-test/suite/vcol/r/vcol_view_myisam.result @@ -103,20 +103,24 @@ select * from v1; b+1 0 -1 +MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1. +MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed explain select * from v1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 -2 DERIVED t1 ALL NULL NULL NULL NULL 4 Using filesort +2 DERIVED t1 ALL NULL NULL NULL NULL 2 Using filesort drop view v1; create view v1 as select c+1 from t1 order by 1 desc limit 2; select * from v1; c+1 0 -1 +MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1. +MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed explain select * from v1; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 -2 DERIVED t1 ALL NULL NULL NULL NULL 4 Using filesort +2 DERIVED t1 ALL NULL NULL NULL NULL 2 Using filesort drop view v1; drop table t1; create table t1 (a int, diff --git a/mysql-test/t/subselect_mat.test b/mysql-test/t/subselect_mat.test index e564ed36040..45f72589e34 100644 --- a/mysql-test/t/subselect_mat.test +++ b/mysql-test/t/subselect_mat.test @@ -3,908 +3,13 @@ # (WL#1110: Subquery optimization: materialization) # ---disable_warnings -drop table if exists t1, t2, t3, t1i, t2i, t3i; -drop view if exists v1, v2, v1m, v2m; ---enable_warnings - -create table t1 (a1 char(8), a2 char(8)); -create table t2 (b1 char(8), b2 char(8)); -create table t3 (c1 char(8), c2 char(8)); - -insert into t1 values ('1 - 00', '2 - 00'); -insert into t1 values ('1 - 01', '2 - 01'); -insert into t1 values ('1 - 02', '2 - 02'); - -insert into t2 values ('1 - 01', '2 - 01'); -insert into t2 values ('1 - 01', '2 - 01'); -insert into t2 values ('1 - 02', '2 - 02'); -insert into t2 values ('1 - 02', '2 - 02'); -insert into t2 values ('1 - 03', '2 - 03'); - -insert into t3 values ('1 - 01', '2 - 01'); -insert into t3 values ('1 - 02', '2 - 02'); -insert into t3 values ('1 - 03', '2 - 03'); -insert into t3 values ('1 - 04', '2 - 04'); - -# Indexed columns -create table t1i (a1 char(8), a2 char(8)); -create table t2i (b1 char(8), b2 char(8)); -create table t3i (c1 char(8), c2 char(8)); -create index it1i1 on t1i (a1); -create index it1i2 on t1i (a2); -create index it1i3 on t1i (a1, a2); - -create index it2i1 on t2i (b1); -create index it2i2 on t2i (b2); -create index it2i3 on t2i (b1, b2); - -create index it3i1 on t3i (c1); -create index it3i2 on t3i (c2); -create index it3i3 on t3i (c1, c2); - -insert into t1i select * from t1; -insert into t2i select * from t2; -insert into t3i select * from t3; # force the use of materialization set @@optimizer_switch='semijoin=off'; -/****************************************************************************** -* Simple tests. -******************************************************************************/ -# non-indexed nullable fields -explain extended -select * from t1 where a1 in (select b1 from t2 where b1 > '0'); -select * from t1 where a1 in (select b1 from t2 where b1 > '0'); - -explain extended -select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); -select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); - -explain extended -select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); -select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); - -explain extended -select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1); -select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1); - -# indexed columns -explain extended -select * from t1i where a1 in (select b1 from t2i where b1 > '0'); -select * from t1i where a1 in (select b1 from t2i where b1 > '0'); - -explain extended -select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1); -select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1); - -explain extended -select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0'); -select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0'); - -explain extended -select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2); -select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2); - -explain extended -select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); -select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); - -# BUG#31639: Wrong plan for uncorrelated subquery when loose scan is applicable. -explain extended -select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1); -select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1); - -prepare st1 from "explain select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)"; -execute st1; -execute st1; -prepare st2 from "select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)"; -execute st2; -execute st2; - -explain extended -select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); -select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); --- error 1235 -select * from t1 where (a1, a2) in (select b1, min(b2) from t2i limit 1,1); - -# test re-optimization/re-execution with different execution methods -# prepare once, exec with different modes -set @@optimizer_switch='default,semijoin=off'; -prepare st1 from -"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)"; -set @@optimizer_switch='default,materialization=off'; -execute st1; -set @@optimizer_switch='default,semijoin=off'; -execute st1; - -set @@optimizer_switch='default,materialization=off'; -prepare st1 from -"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)"; -set @@optimizer_switch='default,semijoin=off'; -execute st1; -set @@optimizer_switch='default,materialization=off'; -execute st1; -set @@optimizer_switch='default,semijoin=off'; - -# materialize the result of ORDER BY -# non-indexed fields -explain extended -select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2); -select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2); -# indexed fields -explain extended -select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2); -select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2); - -/****************************************************************************** -* Views, UNIONs, several levels of nesting. -******************************************************************************/ -# materialize the result of subquery over temp-table view - -create algorithm=merge view v1 as -select b1, c2 from t2, t3 where b2 > c2; - -create algorithm=merge view v2 as -select b1, c2 from t2, t3 group by b2, c2; - -create algorithm=temptable view v1m as -select b1, c2 from t2, t3 where b2 > c2; - -create algorithm=temptable view v2m as -select b1, c2 from t2, t3 group by b2, c2; - -select * from v1 where (c2, b1) in (select c2, b1 from v2 where b1 is not null); -select * from v1 where (c2, b1) in (select distinct c2, b1 from v2 where b1 is not null); - -select * from v1m where (c2, b1) in (select c2, b1 from v2m where b1 is not null); -select * from v1m where (c2, b1) in (select distinct c2, b1 from v2m where b1 is not null); - -drop view v1, v2, v1m, v2m; - -# nested subqueries, views -explain extended -select * from t1 -where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and - (a1, a2) in (select c1, c2 from t3 - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); -select * from t1 -where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and - (a1, a2) in (select c1, c2 from t3 - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); - -explain extended -select * from t1i -where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and - (a1, a2) in (select c1, c2 from t3i - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); -select * from t1i -where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and - (a1, a2) in (select c1, c2 from t3i - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); - -explain extended -select * from t1 -where (a1, a2) in (select b1, b2 from t2 - where b2 in (select c2 from t3 where c2 LIKE '%02') or - b2 in (select c2 from t3 where c2 LIKE '%03')) and - (a1, a2) in (select c1, c2 from t3 - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); -select * from t1 -where (a1, a2) in (select b1, b2 from t2 - where b2 in (select c2 from t3 where c2 LIKE '%02') or - b2 in (select c2 from t3 where c2 LIKE '%03')) and - (a1, a2) in (select c1, c2 from t3 - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); - -# as above with correlated innermost subquery -explain extended -select * from t1 -where (a1, a2) in (select b1, b2 from t2 - where b2 in (select c2 from t3 t3a where c1 = a1) or - b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and - (a1, a2) in (select c1, c2 from t3 t3c - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); -select * from t1 -where (a1, a2) in (select b1, b2 from t2 - where b2 in (select c2 from t3 t3a where c1 = a1) or - b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and - (a1, a2) in (select c1, c2 from t3 t3c - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); - - -# multiple levels of nesting subqueries, unions -explain extended -(select * from t1 -where (a1, a2) in (select b1, b2 from t2 - where b2 in (select c2 from t3 where c2 LIKE '%02') or - b2 in (select c2 from t3 where c2 LIKE '%03') - group by b1, b2) and - (a1, a2) in (select c1, c2 from t3 - where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))) -UNION -(select * from t1i -where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and - (a1, a2) in (select c1, c2 from t3i - where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))); - -(select * from t1 -where (a1, a2) in (select b1, b2 from t2 - where b2 in (select c2 from t3 where c2 LIKE '%02') or - b2 in (select c2 from t3 where c2 LIKE '%03') - group by b1, b2) and - (a1, a2) in (select c1, c2 from t3 - where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))) -UNION -(select * from t1i -where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and - (a1, a2) in (select c1, c2 from t3i - where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))); - - -# UNION of subqueries as a subquery (thus it is not computed via materialization) -explain extended -select * from t1 -where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and - (a1, a2) in (select c1, c2 from t3 - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); -select * from t1 -where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and - (a1, a2) in (select c1, c2 from t3 - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); -# as above, with a join conditon between the outer references -explain extended -select * from t1, t3 -where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and - (c1, c2) in (select c1, c2 from t3 - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and - a1 = c1; -select * from t1, t3 -where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and - (c1, c2) in (select c1, c2 from t3 - where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and - a1 = c1; - - -/****************************************************************************** -* Negative tests, where materialization should not be applied. -******************************************************************************/ -# UNION in a subquery -explain extended -select * from t3 -where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9'); -select * from t3 -where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9'); - -# correlation -explain extended -select * from t1 -where (a1, a2) in (select b1, b2 from t2 - where b2 in (select c2 from t3 t3a where c1 = a1) or - b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and - (a1, a2) in (select c1, c2 from t3 t3c - where (c1, c2) in (select b1, b2 from t2i where b2 > '0' or b2 = a2)); - -# subquery has no tables -explain extended -select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01'); -select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01'); -explain extended -select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual); -select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual); - - -/****************************************************************************** -* Subqueries in other uncovered clauses. -******************************************************************************/ - -/* SELECT clause */ -select ((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL from t1; - -/* GROUP BY clause */ -create table columns (col int key); -insert into columns values (1), (2); - -explain extended -select * from t1 group by (select col from columns limit 1); -select * from t1 group by (select col from columns limit 1); - -explain extended -select * from t1 group by (a1 in (select col from columns)); -select * from t1 group by (a1 in (select col from columns)); - -/* ORDER BY clause */ -explain extended -select * from t1 order by (select col from columns limit 1); -select * from t1 order by (select col from columns limit 1); - -/****************************************************************************** -* Column types/sizes that affect materialization. -******************************************************************************/ - -/* - Test that BLOBs are not materialized (except when arguments of some functions). -*/ -# force materialization to be always considered -set @@optimizer_switch='semijoin=off'; -set @prefix_len = 6; - -# BLOB == 16 (small blobs that could be stored in HEAP tables) -set @blob_len = 16; -set @suffix_len = @blob_len - @prefix_len; - -create table t1_16 (a1 blob(16), a2 blob(16)); -create table t2_16 (b1 blob(16), b2 blob(16)); -create table t3_16 (c1 blob(16), c2 blob(16)); - -insert into t1_16 values - (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); -insert into t1_16 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t1_16 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); - -insert into t2_16 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t2_16 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); -insert into t2_16 values - (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); - -insert into t3_16 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t3_16 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); -insert into t3_16 values - (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); -insert into t3_16 values - (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); - -# single value transformer -explain extended select left(a1,7), left(a2,7) -from t1_16 -where a1 in (select b1 from t2_16 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_16 -where a1 in (select b1 from t2_16 where b1 > '0'); - -# row value transformer -explain extended select left(a1,7), left(a2,7) -from t1_16 -where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_16 -where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0'); - -# string function with a blob argument, the return type may be != blob -explain extended select left(a1,7), left(a2,7) -from t1_16 -where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_16 -where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0'); - -# group_concat with a blob argument - depends on -# the variable group_concat_max_len, and -# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB -explain extended select left(a1,7), left(a2,7) -from t1_16 -where a1 in (select group_concat(b1) from t2_16 group by b2); - -select left(a1,7), left(a2,7) -from t1_16 -where a1 in (select group_concat(b1) from t2_16 group by b2); - -set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 512) - -explain extended select left(a1,7), left(a2,7) -from t1_16 -where a1 in (select group_concat(b1) from t2_16 group by b2); - -select left(a1,7), left(a2,7) -from t1_16 -where a1 in (select group_concat(b1) from t2_16 group by b2); - -# BLOB column at the second (intermediate) level of nesting -explain extended -select * from t1 -where concat(a1,'x') IN - (select left(a1,8) from t1_16 - where (a1, a2) IN - (select t2_16.b1, t2_16.b2 from t2_16, t2 - where t2.b2 = substring(t2_16.b2,1,6) and - t2.b1 IN (select c1 from t3 where c2 > '0'))); - - -drop table t1_16, t2_16, t3_16; - - -# BLOB == 512 (CONVERT_IF_BIGGER_TO_BLOB == 512) -set @blob_len = 512; -set @suffix_len = @blob_len - @prefix_len; - -create table t1_512 (a1 blob(512), a2 blob(512)); -create table t2_512 (b1 blob(512), b2 blob(512)); -create table t3_512 (c1 blob(512), c2 blob(512)); - -insert into t1_512 values - (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); -insert into t1_512 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t1_512 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); - -insert into t2_512 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t2_512 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); -insert into t2_512 values - (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); - -insert into t3_512 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t3_512 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); -insert into t3_512 values - (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); -insert into t3_512 values - (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); - -# single value transformer -explain extended select left(a1,7), left(a2,7) -from t1_512 -where a1 in (select b1 from t2_512 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_512 -where a1 in (select b1 from t2_512 where b1 > '0'); - -# row value transformer -explain extended select left(a1,7), left(a2,7) -from t1_512 -where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_512 -where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0'); - -# string function with a blob argument, the return type may be != blob -explain extended select left(a1,7), left(a2,7) -from t1_512 -where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_512 -where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0'); - -# group_concat with a blob argument - depends on -# the variable group_concat_max_len, and -# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB -explain extended select left(a1,7), left(a2,7) -from t1_512 -where a1 in (select group_concat(b1) from t2_512 group by b2); - -select left(a1,7), left(a2,7) -from t1_512 -where a1 in (select group_concat(b1) from t2_512 group by b2); - -set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 512) - -explain extended select left(a1,7), left(a2,7) -from t1_512 -where a1 in (select group_concat(b1) from t2_512 group by b2); - -select left(a1,7), left(a2,7) -from t1_512 -where a1 in (select group_concat(b1) from t2_512 group by b2); - -drop table t1_512, t2_512, t3_512; - - -# BLOB == 1024 (group_concat_max_len == 1024) -set @blob_len = 1024; -set @suffix_len = @blob_len - @prefix_len; - -create table t1_1024 (a1 blob(1024), a2 blob(1024)); -create table t2_1024 (b1 blob(1024), b2 blob(1024)); -create table t3_1024 (c1 blob(1024), c2 blob(1024)); - -insert into t1_1024 values - (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); -insert into t1_1024 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t1_1024 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); - -insert into t2_1024 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t2_1024 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); -insert into t2_1024 values - (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); - -insert into t3_1024 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t3_1024 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); -insert into t3_1024 values - (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); -insert into t3_1024 values - (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); - -# single value transformer -explain extended select left(a1,7), left(a2,7) -from t1_1024 -where a1 in (select b1 from t2_1024 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_1024 -where a1 in (select b1 from t2_1024 where b1 > '0'); - -# row value transformer -explain extended select left(a1,7), left(a2,7) -from t1_1024 -where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_1024 -where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0'); - -# string function with a blob argument, the return type may be != blob -explain extended select left(a1,7), left(a2,7) -from t1_1024 -where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_1024 -where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0'); - -# group_concat with a blob argument - depends on -# the variable group_concat_max_len, and -# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB -explain extended select left(a1,7), left(a2,7) -from t1_1024 -where a1 in (select group_concat(b1) from t2_1024 group by b2); - -select left(a1,7), left(a2,7) -from t1_1024 -where a1 in (select group_concat(b1) from t2_1024 group by b2); - -set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 1024) - -explain extended select left(a1,7), left(a2,7) -from t1_1024 -where a1 in (select group_concat(b1) from t2_1024 group by b2); - -select left(a1,7), left(a2,7) -from t1_1024 -where a1 in (select group_concat(b1) from t2_1024 group by b2); - -drop table t1_1024, t2_1024, t3_1024; - - -# BLOB == 1025 -set @blob_len = 1025; -set @suffix_len = @blob_len - @prefix_len; - -create table t1_1025 (a1 blob(1025), a2 blob(1025)); -create table t2_1025 (b1 blob(1025), b2 blob(1025)); -create table t3_1025 (c1 blob(1025), c2 blob(1025)); - -insert into t1_1025 values - (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); -insert into t1_1025 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t1_1025 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); - -insert into t2_1025 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t2_1025 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); -insert into t2_1025 values - (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); - -insert into t3_1025 values - (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); -insert into t3_1025 values - (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); -insert into t3_1025 values - (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); -insert into t3_1025 values - (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); - -# single value transformer -explain extended select left(a1,7), left(a2,7) -from t1_1025 -where a1 in (select b1 from t2_1025 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_1025 -where a1 in (select b1 from t2_1025 where b1 > '0'); - -# row value transformer -explain extended select left(a1,7), left(a2,7) -from t1_1025 -where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_1025 -where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0'); - -# string function with a blob argument, the return type may be != blob -explain extended select left(a1,7), left(a2,7) -from t1_1025 -where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0'); - -select left(a1,7), left(a2,7) -from t1_1025 -where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0'); - -# group_concat with a blob argument - depends on -# the variable group_concat_max_len, and -# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB -explain extended select left(a1,7), left(a2,7) -from t1_1025 -where a1 in (select group_concat(b1) from t2_1025 group by b2); - -select left(a1,7), left(a2,7) -from t1_1025 -where a1 in (select group_concat(b1) from t2_1025 group by b2); - -set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 1025) - -explain extended select left(a1,7), left(a2,7) -from t1_1025 -where a1 in (select group_concat(b1) from t2_1025 group by b2); - -select left(a1,7), left(a2,7) -from t1_1025 -where a1 in (select group_concat(b1) from t2_1025 group by b2); - -drop table t1_1025, t2_1025, t3_1025; - -# test for BIT fields -create table t1bit (a1 bit(3), a2 bit(3)); -create table t2bit (b1 bit(3), b2 bit(3)); - -insert into t1bit values (b'000', b'100'); -insert into t1bit values (b'001', b'101'); -insert into t1bit values (b'010', b'110'); - -insert into t2bit values (b'001', b'101'); -insert into t2bit values (b'010', b'110'); -insert into t2bit values (b'110', b'111'); - -set @@optimizer_switch='semijoin=off'; - -explain extended select bin(a1), bin(a2) -from t1bit -where (a1, a2) in (select b1, b2 from t2bit); - -select bin(a1), bin(a2) -from t1bit -where (a1, a2) in (select b1, b2 from t2bit); - -drop table t1bit, t2bit; - -# test mixture of BIT and BLOB -create table t1bb (a1 bit(3), a2 blob(3)); -create table t2bb (b1 bit(3), b2 blob(3)); - -insert into t1bb values (b'000', '100'); -insert into t1bb values (b'001', '101'); -insert into t1bb values (b'010', '110'); - -insert into t2bb values (b'001', '101'); -insert into t2bb values (b'010', '110'); -insert into t2bb values (b'110', '111'); - -explain extended select bin(a1), a2 -from t1bb -where (a1, a2) in (select b1, b2 from t2bb); - -select bin(a1), a2 -from t1bb -where (a1, a2) in (select b1, b2 from t2bb); - -drop table t1bb, t2bb; -drop table t1, t2, t3, t1i, t2i, t3i, columns; - -/****************************************************************************** -* Test the cache of the left operand of IN. -******************************************************************************/ -set @@optimizer_switch='semijoin=off'; - -# Test that default values of Cached_item are not used for comparison -create table t1 (s1 int); -create table t2 (s2 int); -insert into t1 values (5),(1),(0); -insert into t2 values (0), (1); -select s2 from t2 where s2 in (select s1 from t1); -drop table t1, t2; - -create table t1 (a int not null, b int not null); -create table t2 (c int not null, d int not null); -create table t3 (e int not null); - -# the first outer row has no matching inner row -insert into t1 values (1,10); -insert into t1 values (1,20); -insert into t1 values (2,10); -insert into t1 values (2,20); -insert into t1 values (2,30); -insert into t1 values (3,20); -insert into t1 values (4,40); - -insert into t2 values (2,10); -insert into t2 values (2,20); -insert into t2 values (2,40); -insert into t2 values (3,20); -insert into t2 values (4,10); -insert into t2 values (5,10); - -insert into t3 values (10); -insert into t3 values (10); -insert into t3 values (20); -insert into t3 values (30); - -explain extended -select a from t1 where a in (select c from t2 where d >= 20); -select a from t1 where a in (select c from t2 where d >= 20); - -create index it1a on t1(a); - -explain extended -select a from t1 where a in (select c from t2 where d >= 20); -select a from t1 where a in (select c from t2 where d >= 20); - -# the first outer row has a matching inner row -insert into t2 values (1,10); - -explain extended -select a from t1 where a in (select c from t2 where d >= 20); -select a from t1 where a in (select c from t2 where d >= 20); - -# cacheing for IN predicates inside a having clause - here the cached -# items are changed to point to temporary tables. -explain extended -select a from t1 group by a having a in (select c from t2 where d >= 20); -select a from t1 group by a having a in (select c from t2 where d >= 20); - -# create an index that can be used for the outer query GROUP BY -create index iab on t1(a, b); -explain extended -select a from t1 group by a having a in (select c from t2 where d >= 20); -select a from t1 group by a having a in (select c from t2 where d >= 20); - -explain extended -select a from t1 group by a -having a in (select c from t2 where d >= some(select e from t3 where max(b)=e)); -select a from t1 group by a -having a in (select c from t2 where d >= some(select e from t3 where max(b)=e)); -explain extended -select a from t1 -where a in (select c from t2 where d >= some(select e from t3 where b=e)); -select a from t1 -where a in (select c from t2 where d >= some(select e from t3 where b=e)); - -drop table t1, t2, t3; - -# -# BUG#36133 "Assertion `exec_method != MATERIALIZATION || (exec_method == MATERIALIZATION &&" -# -create table t2 (a int, b int, key(a), key(b)); -insert into t2 values (3,3),(3,3),(3,3); -select 1 from t2 where - t2.a > 1 - or - t2.a = 3 and not t2.a not in (select t2.b from t2); -drop table t2; - -# -# BUG#37896 Assertion on entry of Item_in_subselect::exec on subquery with AND NOT -# -create table t1 (a1 int key); -create table t2 (b1 int); -insert into t1 values (5); - -# Query with group by, executed via materialization -explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1); -select min(a1) from t1 where 7 in (select b1 from t2 group by b1); -# Query with group by, executed via IN=>EXISTS -set @@optimizer_switch='default,materialization=off'; -explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1); -select min(a1) from t1 where 7 in (select b1 from t2 group by b1); - -# Executed with materialization -set @@optimizer_switch='default,semijoin=off'; -explain select min(a1) from t1 where 7 in (select b1 from t2); -select min(a1) from t1 where 7 in (select b1 from t2); -# Executed with semi-join. Notice, this time we get a different result (NULL). -# This is the only correct result of all four queries. This difference is -# filed as BUG#40037. -set @@optimizer_switch='default,materialization=off'; -explain select min(a1) from t1 where 7 in (select b1 from t2); -select min(a1) from t1 where 7 in (select b1 from t2); -drop table t1,t2; - -# -# BUG#36752 "subquery materialization produces wrong results when comparing different types" -# -create table t1 (a char(2), b varchar(10)); -insert into t1 values ('a', 'aaa'); -insert into t1 values ('aa', 'aaaa'); - -set @@optimizer_switch='default,semijoin=off'; -explain select a,b from t1 where b in (select a from t1); -select a,b from t1 where b in (select a from t1); -prepare st1 from "select a,b from t1 where b in (select a from t1)"; -execute st1; -execute st1; -drop table t1; - -# -# Bug #44303 Assertion failures in Field_new_decimal::store_decimal -# when executing materialized InsideOut semijoin -# -CREATE TABLE t1 (f1 INT, f2 DECIMAL(5,3)) ENGINE=MyISAM; -INSERT INTO t1 (f1, f2) VALUES (1, 1.789); -INSERT INTO t1 (f1, f2) VALUES (13, 1.454); -INSERT INTO t1 (f1, f2) VALUES (10, 1.668); - -CREATE TABLE t2 LIKE t1; -INSERT INTO t2 VALUES (1, 1.789); -INSERT INTO t2 VALUES (13, 1.454); - -SET @@optimizer_switch='default,semijoin=on,materialization=on'; -EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2); -SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2); - -DROP TABLE t1, t2; - -# -# BUG#46548 IN-subqueries return 0 rows with materialization=on -# -CREATE TABLE t1 ( - pk int, - a varchar(1), - b varchar(4), - c varchar(4), - d varchar(4), - PRIMARY KEY (pk) -); -INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff'); - -CREATE TABLE t2 LIKE t1; -INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff'); - -SET @@optimizer_switch='default,semijoin=on,materialization=on'; -EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); -SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); -SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0); -DROP TABLE t1, t2; - ---echo # ---echo # BUG#50019: Wrong result for IN-subquery with materialization ---echo # -create table t1(i int); -insert into t1 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); -create table t2(i int); -insert into t2 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); -create table t3(i int); -insert into t3 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); -select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5); -set @save_optimizer_switch=@@optimizer_switch; -set session optimizer_switch='materialization=off'; -select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5); -set session optimizer_switch=@save_optimizer_switch; -drop table t1, t2, t3; +--source t/subselect_sj_mat.test +set @@optimizer_switch=default; # # Test that the contents of the temp table of a materialized subquery is # cleaned up between PS re-executions. diff --git a/mysql-test/t/subselect_sj2.test b/mysql-test/t/subselect_sj2.test index e73e7cfade2..ddc7208076b 100644 --- a/mysql-test/t/subselect_sj2.test +++ b/mysql-test/t/subselect_sj2.test @@ -490,6 +490,12 @@ drop table t1, t2; # Bug#33062: subquery in stored routine cause crash # +--disable_warnings +drop procedure if exists p1; +drop procedure if exists p2; +drop procedure if exists p3; +drop procedure if exists p4; +--enable_warnings CREATE TABLE t1(a INT); CREATE TABLE t2(c INT); diff --git a/mysql-test/t/subselect_sj_mat.test b/mysql-test/t/subselect_sj_mat.test new file mode 100644 index 00000000000..dfaf6fb412e --- /dev/null +++ b/mysql-test/t/subselect_sj_mat.test @@ -0,0 +1,938 @@ +# +# Hash semi-join regression tests +# (WL#1110: Subquery optimization: materialization) +# + +set optimizer_switch='firstmatch=off'; +--disable_warnings +drop table if exists t1, t2, t3, t1i, t2i, t3i; +drop view if exists v1, v2, v1m, v2m; +--enable_warnings + +create table t1 (a1 char(8), a2 char(8)); +create table t2 (b1 char(8), b2 char(8)); +create table t3 (c1 char(8), c2 char(8)); + +insert into t1 values ('1 - 00', '2 - 00'); +insert into t1 values ('1 - 01', '2 - 01'); +insert into t1 values ('1 - 02', '2 - 02'); + +insert into t2 values ('1 - 01', '2 - 01'); +insert into t2 values ('1 - 01', '2 - 01'); +insert into t2 values ('1 - 02', '2 - 02'); +insert into t2 values ('1 - 02', '2 - 02'); +insert into t2 values ('1 - 03', '2 - 03'); + +insert into t3 values ('1 - 01', '2 - 01'); +insert into t3 values ('1 - 02', '2 - 02'); +insert into t3 values ('1 - 03', '2 - 03'); +insert into t3 values ('1 - 04', '2 - 04'); + +# Indexed columns +create table t1i (a1 char(8), a2 char(8)); +create table t2i (b1 char(8), b2 char(8)); +create table t3i (c1 char(8), c2 char(8)); +create index it1i1 on t1i (a1); +create index it1i2 on t1i (a2); +create index it1i3 on t1i (a1, a2); + +create index it2i1 on t2i (b1); +create index it2i2 on t2i (b2); +create index it2i3 on t2i (b1, b2); + +create index it3i1 on t3i (c1); +create index it3i2 on t3i (c2); +create index it3i3 on t3i (c1, c2); + +insert into t1i select * from t1; +insert into t2i select * from t2; +insert into t3i select * from t3; + + +/****************************************************************************** +* Simple tests. +******************************************************************************/ +# non-indexed nullable fields +explain extended +select * from t1 where a1 in (select b1 from t2 where b1 > '0'); +select * from t1 where a1 in (select b1 from t2 where b1 > '0'); + +explain extended +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); + +explain extended +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); + +explain extended +select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1); +select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1); + +# indexed columns +--replace_column 7 # +--replace_regex /it1.*/_it1_idx/ /test.t2i.*/_ref_/ /Using index$// /Using where$// +explain extended +select * from t1i where a1 in (select b1 from t2i where b1 > '0'); +select * from t1i where a1 in (select b1 from t2i where b1 > '0'); + +--replace_column 6 # 8 # 11 # +explain extended +select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1); +select * from t1i where a1 in (select b1 from t2i where b1 > '0' group by b1); + +--replace_column 7 # +--replace_regex /it1.*/_it1_idx/ /test.t2i.*/_ref_/ /Using index$// /Using where$// +explain extended +select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0'); +select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0'); + +--replace_column 6 # 7 # 8 # 11 # +explain extended +select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2); +select * from t1i where (a1, a2) in (select b1, b2 from t2i where b1 > '0' group by b1, b2); + +--replace_column 6 # 7 # 8 # 11 # +explain extended +select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); +select * from t1i where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); + +# BUG#31639: Wrong plan for uncorrelated subquery when loose scan is applicable. +explain extended +select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1); +select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1); + +prepare st1 from "explain select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)"; +execute st1; +execute st1; +prepare st2 from "select * from t1 where (a1, a2) in (select b1, max(b2) from t2i group by b1)"; +execute st2; +execute st2; + +explain extended +select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); +select * from t1 where (a1, a2) in (select b1, min(b2) from t2i where b1 > '0' group by b1); +-- error 1235 +select * from t1 where (a1, a2) in (select b1, min(b2) from t2i limit 1,1); + +# test re-optimization/re-execution with different execution methods +# prepare once, exec with different modes +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='default,semijoin=off'; +prepare st1 from +"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)"; +set @@optimizer_switch='default,materialization=off'; +execute st1; +set @@optimizer_switch='default,semijoin=off'; +execute st1; + +set @@optimizer_switch='default,materialization=off'; +prepare st1 from +"select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1)"; +set @@optimizer_switch='default,semijoin=off'; +execute st1; +set @@optimizer_switch='default,materialization=off'; +execute st1; +set @@optimizer_switch=@save_optimizer_switch; + +# materialize the result of ORDER BY +# non-indexed fields +explain extended +select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2); +select * from t1 where (a1, a2) in (select b1, b2 from t2 order by b1, b2); +# indexed fields +explain extended +select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2); +select * from t1i where (a1, a2) in (select b1, b2 from t2i order by b1, b2); + +/****************************************************************************** +* Views, UNIONs, several levels of nesting. +******************************************************************************/ +# materialize the result of subquery over temp-table view + +create algorithm=merge view v1 as +select b1, c2 from t2, t3 where b2 > c2; + +create algorithm=merge view v2 as +select b1, c2 from t2, t3 group by b2, c2; + +create algorithm=temptable view v1m as +select b1, c2 from t2, t3 where b2 > c2; + +create algorithm=temptable view v2m as +select b1, c2 from t2, t3 group by b2, c2; + +select * from v1 where (c2, b1) in (select c2, b1 from v2 where b1 is not null); +select * from v1 where (c2, b1) in (select distinct c2, b1 from v2 where b1 is not null); + +select * from v1m where (c2, b1) in (select c2, b1 from v2m where b1 is not null); +select * from v1m where (c2, b1) in (select distinct c2, b1 from v2m where b1 is not null); + +drop view v1, v2, v1m, v2m; + +# nested subqueries, views +explain extended +select * from t1 +where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and + (a1, a2) in (select c1, c2 from t3 + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +select * from t1 +where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and + (a1, a2) in (select c1, c2 from t3 + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); + +--replace_column 6 # 7 # 8 # 11 # +explain extended +select * from t1i +where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and + (a1, a2) in (select c1, c2 from t3i + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +select * from t1i +where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and + (a1, a2) in (select c1, c2 from t3i + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); + +explain extended +select * from t1 +where (a1, a2) in (select b1, b2 from t2 + where b2 in (select c2 from t3 where c2 LIKE '%02') or + b2 in (select c2 from t3 where c2 LIKE '%03')) and + (a1, a2) in (select c1, c2 from t3 + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +select * from t1 +where (a1, a2) in (select b1, b2 from t2 + where b2 in (select c2 from t3 where c2 LIKE '%02') or + b2 in (select c2 from t3 where c2 LIKE '%03')) and + (a1, a2) in (select c1, c2 from t3 + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); + +# as above with correlated innermost subquery +explain extended +select * from t1 +where (a1, a2) in (select b1, b2 from t2 + where b2 in (select c2 from t3 t3a where c1 = a1) or + b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and + (a1, a2) in (select c1, c2 from t3 t3c + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +select * from t1 +where (a1, a2) in (select b1, b2 from t2 + where b2 in (select c2 from t3 t3a where c1 = a1) or + b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and + (a1, a2) in (select c1, c2 from t3 t3c + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); + + +# multiple levels of nesting subqueries, unions +--replace_column 6 # 7 # 8 # 11 # +explain extended +(select * from t1 +where (a1, a2) in (select b1, b2 from t2 + where b2 in (select c2 from t3 where c2 LIKE '%02') or + b2 in (select c2 from t3 where c2 LIKE '%03') + group by b1, b2) and + (a1, a2) in (select c1, c2 from t3 + where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))) +UNION +(select * from t1i +where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and + (a1, a2) in (select c1, c2 from t3i + where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))); + +(select * from t1 +where (a1, a2) in (select b1, b2 from t2 + where b2 in (select c2 from t3 where c2 LIKE '%02') or + b2 in (select c2 from t3 where c2 LIKE '%03') + group by b1, b2) and + (a1, a2) in (select c1, c2 from t3 + where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))) +UNION +(select * from t1i +where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and + (a1, a2) in (select c1, c2 from t3i + where (c1, c2) in (select b1, b2 from t2i where b2 > '0'))); + + +# UNION of subqueries as a subquery (thus it is not computed via materialization) +explain extended +select * from t1 +where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and + (a1, a2) in (select c1, c2 from t3 + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +select * from t1 +where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and + (a1, a2) in (select c1, c2 from t3 + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')); +# as above, with a join conditon between the outer references +explain extended +select * from t1, t3 +where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and + (c1, c2) in (select c1, c2 from t3 + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and + a1 = c1; +select * from t1, t3 +where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where b1 < '9') and + (c1, c2) in (select c1, c2 from t3 + where (c1, c2) in (select b1, b2 from t2i where b2 > '0')) and + a1 = c1; + + +/****************************************************************************** +* Negative tests, where materialization should not be applied. +******************************************************************************/ +# UNION in a subquery +explain extended +select * from t3 +where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9'); +select * from t3 +where c1 in (select a1 from t1 where a1 > '0' UNION select b1 from t2 where b1 < '9'); + +# correlation +explain extended +select * from t1 +where (a1, a2) in (select b1, b2 from t2 + where b2 in (select c2 from t3 t3a where c1 = a1) or + b2 in (select c2 from t3 t3b where c2 LIKE '%03')) and + (a1, a2) in (select c1, c2 from t3 t3c + where (c1, c2) in (select b1, b2 from t2i where b2 > '0' or b2 = a2)); + +# subquery has no tables +explain extended +select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01'); +select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01'); +explain extended +select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual); +select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual); + + +/****************************************************************************** +* Subqueries in other uncovered clauses. +******************************************************************************/ + +/* SELECT clause */ +select ((a1,a2) IN (select * from t2 where b2 > '0')) IS NULL from t1; + +/* GROUP BY clause */ +create table columns (col int key); +insert into columns values (1), (2); + +explain extended +select * from t1 group by (select col from columns limit 1); +select * from t1 group by (select col from columns limit 1); + +explain extended +select * from t1 group by (a1 in (select col from columns)); +select * from t1 group by (a1 in (select col from columns)); + +/* ORDER BY clause */ +explain extended +select * from t1 order by (select col from columns limit 1); +select * from t1 order by (select col from columns limit 1); + +/****************************************************************************** +* Column types/sizes that affect materialization. +******************************************************************************/ + +/* + Test that BLOBs are not materialized (except when arguments of some functions). +*/ +# force materialization to be always considered +set @prefix_len = 6; + +# BLOB == 16 (small blobs that could be stored in HEAP tables) +set @blob_len = 16; +set @suffix_len = @blob_len - @prefix_len; + +create table t1_16 (a1 blob(16), a2 blob(16)); +create table t2_16 (b1 blob(16), b2 blob(16)); +create table t3_16 (c1 blob(16), c2 blob(16)); + +insert into t1_16 values + (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); +insert into t1_16 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t1_16 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); + +insert into t2_16 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t2_16 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_16 values + (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); + +insert into t3_16 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t3_16 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t3_16 values + (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_16 values + (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); + +# single value transformer +explain extended select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select b1 from t2_16 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select b1 from t2_16 where b1 > '0'); + +# row value transformer +explain extended select left(a1,7), left(a2,7) +from t1_16 +where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_16 +where (a1,a2) in (select b1, b2 from t2_16 where b1 > '0'); + +# string function with a blob argument, the return type may be != blob +explain extended select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0'); + +# group_concat with a blob argument - depends on +# the variable group_concat_max_len, and +# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB +explain extended select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select group_concat(b1) from t2_16 group by b2); + +select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select group_concat(b1) from t2_16 group by b2); + +set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 512) + +explain extended select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select group_concat(b1) from t2_16 group by b2); + +select left(a1,7), left(a2,7) +from t1_16 +where a1 in (select group_concat(b1) from t2_16 group by b2); + +# BLOB column at the second (intermediate) level of nesting +explain extended +select * from t1 +where concat(a1,'x') IN + (select left(a1,8) from t1_16 + where (a1, a2) IN + (select t2_16.b1, t2_16.b2 from t2_16, t2 + where t2.b2 = substring(t2_16.b2,1,6) and + t2.b1 IN (select c1 from t3 where c2 > '0'))); + + +drop table t1_16, t2_16, t3_16; + + +# BLOB == 512 (CONVERT_IF_BIGGER_TO_BLOB == 512) +set @blob_len = 512; +set @suffix_len = @blob_len - @prefix_len; + +create table t1_512 (a1 blob(512), a2 blob(512)); +create table t2_512 (b1 blob(512), b2 blob(512)); +create table t3_512 (c1 blob(512), c2 blob(512)); + +insert into t1_512 values + (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); +insert into t1_512 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t1_512 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); + +insert into t2_512 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t2_512 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_512 values + (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); + +insert into t3_512 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t3_512 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t3_512 values + (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_512 values + (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); + +# single value transformer +explain extended select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select b1 from t2_512 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select b1 from t2_512 where b1 > '0'); + +# row value transformer +explain extended select left(a1,7), left(a2,7) +from t1_512 +where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_512 +where (a1,a2) in (select b1, b2 from t2_512 where b1 > '0'); + +# string function with a blob argument, the return type may be != blob +explain extended select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0'); + +# group_concat with a blob argument - depends on +# the variable group_concat_max_len, and +# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB +explain extended select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select group_concat(b1) from t2_512 group by b2); + +select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select group_concat(b1) from t2_512 group by b2); + +set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 512) + +explain extended select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select group_concat(b1) from t2_512 group by b2); + +select left(a1,7), left(a2,7) +from t1_512 +where a1 in (select group_concat(b1) from t2_512 group by b2); + +drop table t1_512, t2_512, t3_512; + + +# BLOB == 1024 (group_concat_max_len == 1024) +set @blob_len = 1024; +set @suffix_len = @blob_len - @prefix_len; + +create table t1_1024 (a1 blob(1024), a2 blob(1024)); +create table t2_1024 (b1 blob(1024), b2 blob(1024)); +create table t3_1024 (c1 blob(1024), c2 blob(1024)); + +insert into t1_1024 values + (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); +insert into t1_1024 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t1_1024 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); + +insert into t2_1024 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t2_1024 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_1024 values + (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); + +insert into t3_1024 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t3_1024 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t3_1024 values + (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_1024 values + (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); + +# single value transformer +explain extended select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select b1 from t2_1024 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select b1 from t2_1024 where b1 > '0'); + +# row value transformer +explain extended select left(a1,7), left(a2,7) +from t1_1024 +where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_1024 +where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0'); + +# string function with a blob argument, the return type may be != blob +explain extended select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0'); + +# group_concat with a blob argument - depends on +# the variable group_concat_max_len, and +# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB +explain extended select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select group_concat(b1) from t2_1024 group by b2); + +select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select group_concat(b1) from t2_1024 group by b2); + +set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 1024) + +explain extended select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select group_concat(b1) from t2_1024 group by b2); + +select left(a1,7), left(a2,7) +from t1_1024 +where a1 in (select group_concat(b1) from t2_1024 group by b2); + +drop table t1_1024, t2_1024, t3_1024; + + +# BLOB == 1025 +set @blob_len = 1025; +set @suffix_len = @blob_len - @prefix_len; + +create table t1_1025 (a1 blob(1025), a2 blob(1025)); +create table t2_1025 (b1 blob(1025), b2 blob(1025)); +create table t3_1025 (c1 blob(1025), c2 blob(1025)); + +insert into t1_1025 values + (concat('1 - 00', repeat('x', @suffix_len)), concat('2 - 00', repeat('x', @suffix_len))); +insert into t1_1025 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t1_1025 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); + +insert into t2_1025 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t2_1025 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t2_1025 values + (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); + +insert into t3_1025 values + (concat('1 - 01', repeat('x', @suffix_len)), concat('2 - 01', repeat('x', @suffix_len))); +insert into t3_1025 values + (concat('1 - 02', repeat('x', @suffix_len)), concat('2 - 02', repeat('x', @suffix_len))); +insert into t3_1025 values + (concat('1 - 03', repeat('x', @suffix_len)), concat('2 - 03', repeat('x', @suffix_len))); +insert into t3_1025 values + (concat('1 - 04', repeat('x', @suffix_len)), concat('2 - 04', repeat('x', @suffix_len))); + +# single value transformer +explain extended select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select b1 from t2_1025 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select b1 from t2_1025 where b1 > '0'); + +# row value transformer +explain extended select left(a1,7), left(a2,7) +from t1_1025 +where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_1025 +where (a1,a2) in (select b1, b2 from t2_1025 where b1 > '0'); + +# string function with a blob argument, the return type may be != blob +explain extended select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0'); + +select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0'); + +# group_concat with a blob argument - depends on +# the variable group_concat_max_len, and +# convert_blob_length == max_len*collation->mbmaxlen > CONVERT_IF_BIGGER_TO_BLOB +explain extended select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select group_concat(b1) from t2_1025 group by b2); + +select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select group_concat(b1) from t2_1025 group by b2); + +set @@group_concat_max_len = 256; # anything < (CONVERT_IF_BIGGER_TO_BLOB = 1025) + +explain extended select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select group_concat(b1) from t2_1025 group by b2); + +select left(a1,7), left(a2,7) +from t1_1025 +where a1 in (select group_concat(b1) from t2_1025 group by b2); + +drop table t1_1025, t2_1025, t3_1025; + +# test for BIT fields +create table t1bit (a1 bit(3), a2 bit(3)); +create table t2bit (b1 bit(3), b2 bit(3)); + +insert into t1bit values (b'000', b'100'); +insert into t1bit values (b'001', b'101'); +insert into t1bit values (b'010', b'110'); + +insert into t2bit values (b'001', b'101'); +insert into t2bit values (b'010', b'110'); +insert into t2bit values (b'110', b'111'); + +explain extended select bin(a1), bin(a2) +from t1bit +where (a1, a2) in (select b1, b2 from t2bit); + +select bin(a1), bin(a2) +from t1bit +where (a1, a2) in (select b1, b2 from t2bit); + +drop table t1bit, t2bit; + +# test mixture of BIT and BLOB +create table t1bb (a1 bit(3), a2 blob(3)); +create table t2bb (b1 bit(3), b2 blob(3)); + +insert into t1bb values (b'000', '100'); +insert into t1bb values (b'001', '101'); +insert into t1bb values (b'010', '110'); + +insert into t2bb values (b'001', '101'); +insert into t2bb values (b'010', '110'); +insert into t2bb values (b'110', '111'); + +explain extended select bin(a1), a2 +from t1bb +where (a1, a2) in (select b1, b2 from t2bb); + +select bin(a1), a2 +from t1bb +where (a1, a2) in (select b1, b2 from t2bb); + +drop table t1bb, t2bb; +drop table t1, t2, t3, t1i, t2i, t3i, columns; + +/****************************************************************************** +* Test the cache of the left operand of IN. +******************************************************************************/ + +# Test that default values of Cached_item are not used for comparison +create table t1 (s1 int); +create table t2 (s2 int); +insert into t1 values (5),(1),(0); +insert into t2 values (0), (1); +select s2 from t2 where s2 in (select s1 from t1); +drop table t1, t2; + +create table t1 (a int not null, b int not null); +create table t2 (c int not null, d int not null); +create table t3 (e int not null); + +# the first outer row has no matching inner row +insert into t1 values (1,10); +insert into t1 values (1,20); +insert into t1 values (2,10); +insert into t1 values (2,20); +insert into t1 values (2,30); +insert into t1 values (3,20); +insert into t1 values (4,40); + +insert into t2 values (2,10); +insert into t2 values (2,20); +insert into t2 values (2,40); +insert into t2 values (3,20); +insert into t2 values (4,10); +insert into t2 values (5,10); + +insert into t3 values (10); +insert into t3 values (10); +insert into t3 values (20); +insert into t3 values (30); + +explain extended +select a from t1 where a in (select c from t2 where d >= 20); +select a from t1 where a in (select c from t2 where d >= 20); + +create index it1a on t1(a); + +explain extended +select a from t1 where a in (select c from t2 where d >= 20); +select a from t1 where a in (select c from t2 where d >= 20); + +# the first outer row has a matching inner row +insert into t2 values (1,10); + +explain extended +select a from t1 where a in (select c from t2 where d >= 20); +select a from t1 where a in (select c from t2 where d >= 20); + +# cacheing for IN predicates inside a having clause - here the cached +# items are changed to point to temporary tables. +explain extended +select a from t1 group by a having a in (select c from t2 where d >= 20); +select a from t1 group by a having a in (select c from t2 where d >= 20); + +# create an index that can be used for the outer query GROUP BY +create index iab on t1(a, b); +explain extended +select a from t1 group by a having a in (select c from t2 where d >= 20); +select a from t1 group by a having a in (select c from t2 where d >= 20); + +explain extended +select a from t1 group by a +having a in (select c from t2 where d >= some(select e from t3 where max(b)=e)); +select a from t1 group by a +having a in (select c from t2 where d >= some(select e from t3 where max(b)=e)); +explain extended +select a from t1 +where a in (select c from t2 where d >= some(select e from t3 where b=e)); +select a from t1 +where a in (select c from t2 where d >= some(select e from t3 where b=e)); + +drop table t1, t2, t3; + +# +# BUG#36133 "Assertion `exec_method != MATERIALIZATION || (exec_method == MATERIALIZATION &&" +# +create table t2 (a int, b int, key(a), key(b)); +insert into t2 values (3,3),(3,3),(3,3); +select 1 from t2 where + t2.a > 1 + or + t2.a = 3 and not t2.a not in (select t2.b from t2); +drop table t2; + +# +# BUG#37896 Assertion on entry of Item_in_subselect::exec on subquery with AND NOT +# +create table t1 (a1 int key); +create table t2 (b1 int); +insert into t1 values (5); + +# Query with group by, executed via materialization +explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1); +select min(a1) from t1 where 7 in (select b1 from t2 group by b1); +# Query with group by, executed via IN=>EXISTS +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='default,materialization=off'; +explain select min(a1) from t1 where 7 in (select b1 from t2 group by b1); +select min(a1) from t1 where 7 in (select b1 from t2 group by b1); + +# Executed with materialization +set @@optimizer_switch='default,semijoin=off'; +explain select min(a1) from t1 where 7 in (select b1 from t2); +select min(a1) from t1 where 7 in (select b1 from t2); +# Executed with semi-join. Notice, this time we get a different result (NULL). +# This is the only correct result of all four queries. This difference is +# filed as BUG#40037. +set @@optimizer_switch='default,materialization=off'; +-- echo # with MariaDB and MWL#90, this particular case is solved: +explain select min(a1) from t1 where 7 in (select b1 from t2); +select min(a1) from t1 where 7 in (select b1 from t2); +-- echo # but when we go around MWL#90 code, the problem still shows up: +explain select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4; +select min(a1) from t1 where 7 in (select b1 from t2) or 2> 4; +set @@optimizer_switch= @save_optimizer_switch; +drop table t1,t2; + +# +# BUG#36752 "subquery materialization produces wrong results when comparing different types" +# +create table t1 (a char(2), b varchar(10)); +insert into t1 values ('a', 'aaa'); +insert into t1 values ('aa', 'aaaa'); + +explain select a,b from t1 where b in (select a from t1); +select a,b from t1 where b in (select a from t1); +prepare st1 from "select a,b from t1 where b in (select a from t1)"; +execute st1; +execute st1; +drop table t1; + +# +# Bug #44303 Assertion failures in Field_new_decimal::store_decimal +# when executing materialized InsideOut semijoin +# +CREATE TABLE t1 (f1 INT, f2 DECIMAL(5,3)) ENGINE=MyISAM; +INSERT INTO t1 (f1, f2) VALUES (1, 1.789); +INSERT INTO t1 (f1, f2) VALUES (13, 1.454); +INSERT INTO t1 (f1, f2) VALUES (10, 1.668); + +CREATE TABLE t2 LIKE t1; +INSERT INTO t2 VALUES (1, 1.789); +INSERT INTO t2 VALUES (13, 1.454); + +set @save_optimizer_switch=@@optimizer_switch; +SET @@optimizer_switch='default,semijoin=on,materialization=on'; +EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2); +SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2); +set @@optimizer_switch= @save_optimizer_switch; + +DROP TABLE t1, t2; + +# +# BUG#46548 IN-subqueries return 0 rows with materialization=on +# +CREATE TABLE t1 ( + pk int, + a varchar(1), + b varchar(4), + c varchar(4), + d varchar(4), + PRIMARY KEY (pk) +); +INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo'),(2,'f','ffff','ffff','ffff'); + +CREATE TABLE t2 LIKE t1; +INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii'),(2,'f','ffff','ffff','ffff'); + +set @save_optimizer_switch=@@optimizer_switch; +SET @@optimizer_switch='default,semijoin=on,materialization=on'; +EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); +SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0); +SELECT pk FROM t1 WHERE (b,c,d) IN (SELECT b,c,d FROM t2 WHERE pk > 0); +DROP TABLE t1, t2; +set optimizer_switch=@save_optimizer_switch; + +--echo # +--echo # BUG#50019: Wrong result for IN-subquery with materialization +--echo # +create table t1(i int); +insert into t1 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); +create table t2(i int); +insert into t2 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); +create table t3(i int); +insert into t3 values (1), (2), (3), (4), (5), (6), (7), (8), (9), (10); +select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5); +set @save_optimizer_switch=@@optimizer_switch; +set session optimizer_switch='materialization=off'; +select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5); +set session optimizer_switch=@save_optimizer_switch; +drop table t1, t2, t3; + +# +# Test that the contentes of the temp table of a materialized subquery is +# cleanup up between PS reexecutions. +# + +create table t0 (a int); +insert into t0 values (0),(1),(2); +create table t1 (a int); +insert into t1 values (0),(1),(2); +explain select a, a in (select a from t1) from t0; +select a, a in (select a from t1) from t0; +prepare s from 'select a, a in (select a from t1) from t0'; +execute s; +update t1 set a=123; +execute s; +drop table t0, t1; +set optimizer_switch='firstmatch=on'; diff --git a/sql-bench/test-table-elimination.sh b/sql-bench/test-table-elimination.sh index 338a7ceb4b5..0dcfe975486 100755 --- a/sql-bench/test-table-elimination.sh +++ b/sql-bench/test-table-elimination.sh @@ -1,3 +1,4 @@ + #!@PERL@ # Test of table elimination feature diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc index 32641a7ea3b..9566d5594d1 100644 --- a/sql/item_cmpfunc.cc +++ b/sql/item_cmpfunc.cc @@ -5894,28 +5894,12 @@ Item_field* Item_equal::get_first(Item_field *field) { /* It's a field from an materialized semi-join. We can substitute it only - for a field from the same semi-join. + for a field from the same semi-join. Find the first of such items. */ - JOIN_TAB *first= field_tab; - JOIN *join= field_tab->join; - int tab_idx= field_tab - field_tab->join->join_tab; - DBUG_ASSERT(join->join_tab[tab_idx].table->map & - emb_nest->sj_inner_tables); - - /* Find the first table of this semi-join nest */ - for (int i= tab_idx-1; i >= (int)join->const_tables; i--) - { - if (join->join_tab[i].table->map & emb_nest->sj_inner_tables) - first= join->join_tab + i; - else - // Found first tab that doesn't belong to current SJ. - break; - } - /* Find an item to substitute for. */ while ((item= it++)) { - if (item->field->table->reginfo.join_tab >= first) + if (item->field->table->pos_in_table_list->embedding == emb_nest) { /* If we found given field then return NULL to avoid unnecessary @@ -5927,32 +5911,27 @@ Item_field* Item_equal::get_first(Item_field *field) } else { -#if 0 /* The field is not in SJ-Materialization nest. We must return the first - field that's not embedded in a SJ-Materialization nest. - Example: suppose we have a join order: + field in the join order. The field may be inside a semi-join nest, i.e + a join order may look like this: SJ-Mat(it1 it2) ot1 ot2 - and equality ot2.col = ot1.col = it2.col - If we're looking for best substitute for 'ot2.col', we should pick ot1.col - and not it2.col, because when we run a join between ot1 and ot2 - execution of SJ-Mat(...) has already finished and we can't rely on the - value of it*.*. - psergey-fix-fix: ^^ THAT IS INCORRECT ^^. Pick the first, whatever that - is. + where we're looking what to substitute ot2.col for. In this case we must + still return it1.col, here's a proof why: + + First let's note that either it1.col or it2.col participates in + subquery's IN-equality. It can't be otherwise, because materialization is + only applicable to uncorrelated subqueries, so the only way we could + infer "it1.col=ot1.col" is from the IN-equality. Ok, so IN-eqality has + it1.col or it2.col on its inner side. it1.col is first such item in the + join order, so it's not possible for SJ-Mat to be + SJ-Materialization-lookup, it is SJ-Materialization-Scan. The scan part + of this strategy will unpack value of it1.col=it2.col into it1.col + (that's the first equal item inside the subquery), and we'll be able to + get it from there. qed. */ - while ((item= it++)) - { - TABLE_LIST *emb_nest= item->field->table->pos_in_table_list->embedding; - if (!emb_nest || !emb_nest->sj_mat_info || - !emb_nest->sj_mat_info->is_used) - { - return item; - } - } -#endif return fields.head(); } // Shouldn't get here. diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc index ff318fa5d73..356d2e9d797 100644 --- a/sql/item_subselect.cc +++ b/sql/item_subselect.cc @@ -209,11 +209,7 @@ bool Item_subselect::fix_fields(THD *thd_param, Item **ref) { // all transformation is done (used by prepared statements) changed= 1; - inside_first_fix_fields= FALSE; - - - // all transformation is done (used by prepared statements) - changed= 1; + inside_first_fix_fields= FALSE; /* Substitute the current item with an Item_in_optimizer that was @@ -238,13 +234,13 @@ bool Item_subselect::fix_fields(THD *thd_param, Item **ref) if (!(*ref)->fixed) res= (*ref)->fix_fields(thd, ref); goto end; -//psergey-merge: done_first_fix_fields= FALSE; + } // Is it one field subselect? if (engine->cols() > max_columns) { my_error(ER_OPERAND_COLUMNS, MYF(0), 1); -//psergey-merge: done_first_fix_fields= FALSE; + goto end; } fix_length_and_dec(); @@ -262,6 +258,7 @@ bool Item_subselect::fix_fields(THD *thd_param, Item **ref) end: done_first_fix_fields= FALSE; + inside_first_fix_fields= FALSE; thd->where= save_where; return res; } @@ -491,6 +488,12 @@ bool Item_subselect::exec() return (res); } +int Item_subselect::optimize() +{ + int res; + res= engine->optimize(); + return res; +} /** Check if an expression cache is needed for this subquery @@ -797,9 +800,6 @@ Item_singlerow_subselect::select_transformer(JOIN *join) void Item_singlerow_subselect::store(uint i, Item *item) { row[i]->store(item); - //psergey-merge: can do without that: row[i]->cache_value(); - //psergey-backport-timours: ^ really, without that ^ - //psergey-try-merge-again: row[i]->cache_value(); } @@ -2222,7 +2222,7 @@ void Item_in_subselect::update_used_tables() @retval FALSE an execution method was chosen successfully */ -bool Item_in_subselect::setup_engine() +bool Item_in_subselect::setup_engine(bool dont_switch_arena) { subselect_hash_sj_engine *new_engine= NULL; bool res= FALSE; @@ -2237,14 +2237,15 @@ bool Item_in_subselect::setup_engine() old_engine= (subselect_single_select_engine*) engine; - if (arena->is_conventional()) + if (arena->is_conventional() || dont_switch_arena) arena= 0; else thd->set_n_backup_active_arena(arena, &backup); if (!(new_engine= new subselect_hash_sj_engine(thd, this, old_engine)) || - new_engine->init_permanent(unit->get_unit_column_types())) + new_engine->init_permanent(unit->get_unit_column_types(), + old_engine->get_identifier())) { Item_subselect::trans_res trans_res; /* @@ -3586,7 +3587,7 @@ subselect_hash_sj_engine::get_strategy_using_schema() bitmap_set_bit(&partial_match_key_parts, i); ++count_partial_match_columns; } - } + }; } /* If no column contains NULLs use regular hash index lookups. */ @@ -3786,6 +3787,7 @@ bitmap_init_memroot(MY_BITMAP *map, uint n_bits, MEM_ROOT *mem_root) reexecution. @param tmp_columns the items that produce the data for the temp table + @param subquery_id subquery's identifier (for temptable name) @details - Create a temporary table to store the result of the IN subquery. The @@ -3801,7 +3803,8 @@ bitmap_init_memroot(MY_BITMAP *map, uint n_bits, MEM_ROOT *mem_root) @retval FALSE otherwise */ -bool subselect_hash_sj_engine::init_permanent(List<Item> *tmp_columns) +bool subselect_hash_sj_engine::init_permanent(List<Item> *tmp_columns, + uint subquery_id) { /* Options to create_tmp_table. */ ulonglong tmp_create_options= thd->options | TMP_TABLE_ALL_COLUMNS; @@ -3836,12 +3839,19 @@ bool subselect_hash_sj_engine::init_permanent(List<Item> *tmp_columns) DBUG_RETURN(TRUE); } */ + char buf[32]; + uint len= my_snprintf(buf, sizeof(buf), "<subquery%d>", subquery_id); + char *name; + if (!(name= (char*)thd->alloc(len + 1))) + DBUG_RETURN(TRUE); + memcpy(name, buf, len+1); + if (!(result= new select_materialize_with_stats)) DBUG_RETURN(TRUE); if (((select_union*) result)->create_result_table( thd, tmp_columns, TRUE, tmp_create_options, - "materialized subselect", TRUE)) + name, TRUE)) DBUG_RETURN(TRUE); tmp_table= ((select_union*) result)->table; @@ -3922,7 +3932,7 @@ bool subselect_hash_sj_engine::make_semi_join_conds() if (!(tmp_table_ref= (TABLE_LIST*) thd->alloc(sizeof(TABLE_LIST)))) DBUG_RETURN(TRUE); - tmp_table_ref->init_one_table("", "materialized subselect", TL_READ); + tmp_table_ref->init_one_table("", tmp_table->alias.c_ptr(), TL_READ); tmp_table_ref->table= tmp_table; context= new Name_resolution_context; @@ -3988,6 +3998,7 @@ subselect_hash_sj_engine::make_unique_engine() tab->table= tmp_table; tab->ref.tmp_table_index_lookup_init(thd, tmp_key, it, FALSE); + DBUG_RETURN(new subselect_uniquesubquery_engine(thd, tab, item, semi_join_conds)); } @@ -4067,6 +4078,17 @@ void subselect_hash_sj_engine::cleanup() } +int subselect_hash_sj_engine::optimize() +{ + int res= 0; + SELECT_LEX *save_select= thd->lex->current_select; + thd->lex->current_select= materialize_join->select_lex; + res= materialize_join->optimize(); + thd->lex->current_select= save_select; + + return res; +} + /** Execute a subquery IN predicate via materialization. diff --git a/sql/item_subselect.h b/sql/item_subselect.h index 8d590bc4273..a0db43fe9fe 100644 --- a/sql/item_subselect.h +++ b/sql/item_subselect.h @@ -46,16 +46,17 @@ protected: < child_join->prepare < engine->prepare *ref= substitution; + substitution= NULL; < Item_subselect::fix_fields */ - Item *substitution; public: + Item *substitution; /* unit of subquery */ st_select_lex_unit *unit; -protected: Item *expr_cache; /* engine that perform execution of subselect (single select or union) */ subselect_engine *engine; +protected: /* old engine if engine was changed */ subselect_engine *old_engine; /* cache of used external tables */ @@ -148,6 +149,7 @@ public: bool mark_as_dependent(THD *thd, st_select_lex *select, Item *item); void fix_after_pullout(st_select_lex *new_parent, Item **ref); void recalc_used_tables(st_select_lex *new_parent, bool after_pullout); + virtual int optimize(); virtual bool exec(); virtual void fix_length_and_dec(); table_map used_tables() const; @@ -351,7 +353,9 @@ protected: all JOIN in UNION */ Item *expr; +public: Item_in_optimizer *optimizer; +protected: bool was_null; bool abort_on_null; public: @@ -397,6 +401,16 @@ public: }; enum_exec_method exec_method; + /* + TRUE<=>this is a flattenable semi-join, false overwise. + */ + bool is_flattenable_semijoin; + + /* + Cost to populate the temporary table (set on if-needed basis). + */ + //double startup_cost; + bool *get_cond_guard(int i) { return pushed_cond_guards ? pushed_cond_guards + i : NULL; @@ -446,7 +460,7 @@ public: bool fix_fields(THD *thd, Item **ref); void fix_after_pullout(st_select_lex *new_parent, Item **ref); void update_used_tables(); - bool setup_engine(); + bool setup_engine(bool dont_switch_arena); bool init_left_expr_cache(); /* Inform 'this' that it was computed, and contains a valid result. */ void set_first_execution() { if (first_execution) first_execution= FALSE; } @@ -522,6 +536,7 @@ public: THD * get_thd() { return thd; } virtual int prepare()= 0; virtual void fix_length_and_dec(Item_cache** row)= 0; + virtual int optimize() { DBUG_ASSERT(0); return 0; } /* Execute the engine @@ -752,7 +767,7 @@ inline bool Item_subselect::is_uncacheable() const class subselect_hash_sj_engine : public subselect_engine { -protected: +public: /* The table into which the subquery is materialized. */ TABLE *tmp_table; /* TRUE if the subquery was materialized into a temp table. */ @@ -764,14 +779,16 @@ protected: of subselect_single_select_engine::[prepare | cols]. */ subselect_single_select_engine *materialize_engine; +protected: /* The engine used to compute the IN predicate. */ subselect_engine *lookup_engine; /* QEP to execute the subquery and materialize its result into a temporary table. Created during the first call to exec(). */ +public: JOIN *materialize_join; - +protected: /* Keyparts of the only non-NULL composite index in a rowid merge. */ MY_BITMAP non_null_key_parts; /* Keyparts of the single column indexes with NULL, one keypart per index. */ @@ -784,7 +801,9 @@ protected: IN results because index lookups sometimes match values that are actually not equal to the search key in SQL terms. */ +public: Item_cond_and *semi_join_conds; +protected: /* Possible execution strategies that can be used to compute hash semi-join.*/ enum exec_strategy { UNDEFINED, @@ -818,10 +837,11 @@ public: {} ~subselect_hash_sj_engine(); - bool init_permanent(List<Item> *tmp_columns); + bool init_permanent(List<Item> *tmp_columns, uint subquery_id); bool init_runtime(); void cleanup(); int prepare() { return 0; } /* Override virtual function in base class. */ + int optimize(); int exec(); virtual void print(String *str, enum_query_type query_type); uint cols() diff --git a/sql/opt_range.cc b/sql/opt_range.cc index faeafab7209..82c46cd45e6 100644 --- a/sql/opt_range.cc +++ b/sql/opt_range.cc @@ -2909,7 +2909,8 @@ int SQL_SELECT::test_quick_select(THD *thd, key_map keys_to_use, quick=0; needed_reg.clear_all(); quick_keys.clear_all(); - if (keys_to_use.is_clear_all()) + DBUG_ASSERT(!head->is_filled_at_execution()); + if (keys_to_use.is_clear_all() || head->is_filled_at_execution()) DBUG_RETURN(0); records= head->file->stats.records; if (!records) diff --git a/sql/opt_subselect.cc b/sql/opt_subselect.cc index 29b458e5be5..f6cbb3054bd 100644 --- a/sql/opt_subselect.cc +++ b/sql/opt_subselect.cc @@ -2,7 +2,7 @@ @file @brief - Subquery optimization code here. + Semi-join subquery optimizations code */ @@ -16,7 +16,162 @@ #include <my_bit.h> -// Our own: +/* + This file contains optimizations for semi-join subqueries. + + Contents + -------- + 1. What is a semi-join subquery + 2. General idea about semi-join execution + 2.1 Correlated vs uncorrelated semi-joins + 2.2 Mergeable vs non-mergeable semi-joins + 3. Code-level view of semi-join processing + 3.1 Conversion + 3.1.1 Merged semi-join TABLE_LIST object + 3.1.2 Non-merged semi-join data structure + 3.2 Semi-joins and query optimization + 3.2.1 Non-merged semi-joins and join optimization + 3.2.2 Merged semi-joins and join optimization + 3.3 Semi-joins and query execution + + 1. What is a semi-join subquery + ------------------------------- + We use this definition of semi-join: + + outer_tbl SEMI JOIN inner_tbl ON cond = {set of outer_tbl.row such that + exist inner_tbl.row, for which + cond(outer_tbl.row,inner_tbl.row) + is satisfied} + + That is, semi-join operation is similar to inner join operation, with + exception that we don't care how many matches a row from outer_tbl has in + inner_tbl. + + In SQL terms: a semi-join subquery is an IN subquery that is an AND-part of + the WHERE/ON clause. + + 2. General idea about semi-join execution + ----------------------------------------- + We can execute semi-join in a way similar to inner join, with exception that + we need to somehow ensure that we do not generate record combinations that + differ only in rows of inner tables. + There is a number of different ways to achieve this property, implemented by + a number of semi-join execution strategies. + Some strategies can handle any semi-joins, other can be applied only to + semi-joins that have certain properties that are described below: + + 2.1 Correlated vs uncorrelated semi-joins + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + Uncorrelated semi-joins are special in the respect that they allow to + - execute the subquery (possible as it's uncorrelated) + - somehow make sure that generated set does not have duplicates + - perform an inner join with outer tables. + + or, rephrasing in SQL form: + + SELECT ... FROM ot WHERE ot.col IN (SELECT it.col FROM it WHERE uncorr_cond) + -> + SELECT ... FROM ot JOIN (SELECT DISTINCT it.col FROM it WHERE uncorr_cond) + + 2.2 Mergeable vs non-mergeable semi-joins + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + Semi-join operation has some degree of commutability with inner join + operation: we can join subquery's tables with ouside table(s) and eliminate + duplicate record combination after that: + + ot1 JOIN ot2 SEMI_JOIN{it1,it2} (it1 JOIN it2) ON sjcond(ot2,it*) -> + | + +-------------------------------+ + v + ot1 SEMI_JOIN{it1,it2} (it1 JOIN it2 JOIN ot2) ON sjcond(ot2,it*) + + In order for this to work, subquery's top-level operation must be join, and + grouping or ordering with limit (grouping or ordering with limit are not + commutative with duplicate removal). In other words, the conversion is + possible when the subquery doesn't have GROUP BY clause, any aggregate + functions*, or ORDER BY ... LIMIT clause. + + Definitions: + - Subquery whose top-level operation is a join is called *mergeable semi-join* + - All other kinds of semi-join subqueries are considered non-mergeable. + + *- this requirement is actually too strong, but its exceptions are too + complicated to be considered here. + + 3. Code-level view of semi-join processing + ------------------------------------------ + + 3.1 Conversion and pre-optimization data structures + --------------------------------------------------- + * When doing JOIN::prepare for the subquery, we detect that it can be + converted into a semi-join and register it in parent_join->sj_subselects + + * At the start of parent_join->optimize(), the predicate is converted into + a semi-join node. A semi-join node is a TABLE_LIST object that is linked + somewhere in parent_join->join_list (either it is just present there, or + it is a descendant of some of its members). + + There are two kinds of semi-joins: + - Merged semi-joins + - Non-merged semi-joins + + 3.1.1 Merged semi-join TABLE_LIST object + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + Merged semi-join object is a TABLE_LIST that contains a sub-join of + subquery tables and the semi-join ON expression (in this respect it is + very similar to nested outer join representation) + Merged semi-join represents this SQL: + + ... SEMI JOIN (inner_tbl1 JOIN ... JOIN inner_tbl_n) ON sj_on_expr + + Semi-join objects of this kind have TABLE_LIST::sj_subq_pred set. + + 3.1.2 Non-merged semi-join data structure + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + Non-merged semi-join object is a leaf TABLE_LIST object that has a subquery + that produces rows. It is similar to a base table and represents this SQL: + + ... SEMI_JOIN (SELECT non_mergeable_select) ON sj_on_expr + + Subquery items that were converted into semi-joins are removed from the WHERE + clause. (They do remain in PS-saved WHERE clause, and they replace themselves + with Item_int(1) on subsequent re-executions). + + 3.2 Semi-joins and join optimization + ------------------------------------ + + 3.2.1 Non-merged semi-joins and join optimization + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + For join optimization purposes, non-merged semi-join nests are similar to + base tables - they've got one JOIN_TAB, which can be accessed with one of + two methods: + - full table scan (representing SJ-Materialization-Scan strategy) + - eq_ref-like table lookup (representing SJ-Materialization-Lookup) + + Unlike regular base tables, non-merged semi-joins have: + - non-zero JOIN_TAB::startup_cost, and + - join_tab->table->is_filled_at_execution()==TRUE, which means one + cannot do const table detection or range analysis or other table data- + dependent inferences + // instead, get_delayed_table_estimates() runs optimization on the nest so that + // we get an idea about temptable size + + 3.2.2 Merged semi-joins and join optimization + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + - optimize_semijoin_nests() does pre-optimization + - during join optimization, the join has one JOIN_TAB (or is it POSITION?) + array, and suffix-based detection is used, see advance_sj_state() + - after join optimization is done, get_best_combination() switches + the data-structure to prefix-based, multiple JOIN_TAB ranges format. + + 3.3 Semi-joins and query execution + ---------------------------------- + * Join executor has hooks for all semi-join strategies. + TODO elaborate. + +*/ + + static bool subquery_types_allow_materialization(Item_in_subselect *in_subs); static bool replace_where_subcondition(JOIN *join, Item **expr, @@ -25,6 +180,8 @@ static bool replace_where_subcondition(JOIN *join, Item **expr, static int subq_sj_candidate_cmp(Item_in_subselect* const *el1, Item_in_subselect* const *el2); static bool convert_subq_to_sj(JOIN *parent_join, Item_in_subselect *subq_pred); +static bool convert_subq_to_jtbm(JOIN *parent_join, + Item_in_subselect *subq_pred, bool *remove); static TABLE_LIST *alloc_join_nest(THD *thd); static void fix_list_after_tbl_changes(SELECT_LEX *new_parent, List<TABLE_LIST> *tlist); @@ -50,17 +207,22 @@ static void remove_subq_pushed_predicates(JOIN *join, Item **where); /* Check if we need JOIN::prepare()-phase subquery rewrites and if yes, do them + SYNOPSIS + check_and_do_in_subquery_rewrites() + join Subquery's join + DESCRIPTION Check if we need to do - - subquery->semi-join rewrite + - subquery -> mergeable semi-join rewrite - if the subquery can be handled with materialization - 'substitution' rewrite for table-less subqueries like "(select 1)" - - and mark appropriately + - IN->EXISTS rewrite + and, depending on the rewrite, either do it, or record it to be done at a + later phase. RETURN - 0 - OK - -1 - Some sort of query error + 0 - OK + Other - Some sort of query error */ int check_and_do_in_subquery_rewrites(JOIN *join) @@ -166,6 +328,7 @@ int check_and_do_in_subquery_rewrites(JOIN *join) (void)subquery_types_allow_materialization(in_subs); in_subs->emb_on_expr_nest= thd->thd_marker.emb_on_expr_nest; + in_subs->is_flattenable_semijoin= TRUE; /* Register the subquery for further processing in flatten_subqueries() */ select_lex-> @@ -220,10 +383,24 @@ int check_and_do_in_subquery_rewrites(JOIN *join) (in_subs->is_top_level_item() || optimizer_flag(thd, OPTIMIZER_SWITCH_PARTIAL_MATCH_ROWID_MERGE) || optimizer_flag(thd, OPTIMIZER_SWITCH_PARTIAL_MATCH_TABLE_SCAN)) &&//4 - !in_subs->is_correlated && // 5 - in_subs->exec_method == Item_in_subselect::NOT_TRANSFORMED) // 6 + !in_subs->is_correlated) // 5 { + if (in_subs->exec_method == Item_in_subselect::NOT_TRANSFORMED) in_subs->exec_method= Item_in_subselect::MATERIALIZATION; + + /* + If the subquery is an AND-part of WHERE register for being processed + with jtbm strategy + */ + if (in_subs->exec_method == Item_in_subselect::MATERIALIZATION && + thd->thd_marker.emb_on_expr_nest == (TABLE_LIST*)0x1 && + optimizer_flag(thd, OPTIMIZER_SWITCH_SEMIJOIN)) + { + in_subs->emb_on_expr_nest= thd->thd_marker.emb_on_expr_nest; + in_subs->is_flattenable_semijoin= FALSE; + select_lex->outer_select()-> + join->sj_subselects.append(thd->mem_root, in_subs); + } } Item_subselect::trans_res trans_res; @@ -339,6 +516,69 @@ bool subquery_types_allow_materialization(Item_in_subselect *in_subs) /* + Finalize IN->EXISTS conversion in case we couldn't use materialization. + + DESCRIPTION Invoke the IN->EXISTS converter + Replace the Item_in_subselect with its wrapper Item_in_optimizer in WHERE. + + RETURN + FALSE - Ok + TRUE - Fatal error +*/ + +static +bool make_in_exists_conversion(THD *thd, JOIN *join, Item_in_subselect *item) +{ + DBUG_ENTER("make_in_exists_conversion"); + JOIN *child_join= item->unit->first_select()->join; + Item_subselect::trans_res res; + item->changed= 0; + item->fixed= 0; + + SELECT_LEX *save_select_lex= thd->lex->current_select; + thd->lex->current_select= item->unit->first_select(); + + res= item->select_transformer(child_join); + + thd->lex->current_select= save_select_lex; + + if (res == Item_subselect::RES_ERROR) + DBUG_RETURN(TRUE); + + item->changed= 1; + item->fixed= 1; + + Item *substitute= item->substitution; + bool do_fix_fields= !item->substitution->fixed; + /* + The Item_subselect has already been wrapped with Item_in_optimizer, so we + should search for item->optimizer, not 'item'. + */ + Item *replace_me= item->optimizer; + DBUG_ASSERT(replace_me==substitute); + + Item **tree= (item->emb_on_expr_nest == (TABLE_LIST*)1)? + &join->conds : &(item->emb_on_expr_nest->on_expr); + if (replace_where_subcondition(join, tree, replace_me, substitute, + do_fix_fields)) + DBUG_RETURN(TRUE); + item->substitution= NULL; + + if (!thd->stmt_arena->is_conventional()) + { + tree= (item->emb_on_expr_nest == (TABLE_LIST*)1)? + &join->select_lex->prep_where : + &(item->emb_on_expr_nest->prep_on_expr); + + if (replace_where_subcondition(join, tree, replace_me, substitute, + FALSE)) + DBUG_RETURN(TRUE); + } + DBUG_RETURN(FALSE); +} + + +/* Convert semi-join subquery predicates into semi-join join nests SYNOPSIS @@ -445,25 +685,41 @@ bool convert_join_subqueries_to_semijoins(JOIN *join) // #tables-in-parent-query + #tables-in-subquery < MAX_TABLES /* Replace all subqueries to be flattened with Item_int(1) */ arena= thd->activate_stmt_arena_if_needed(&backup); - for (in_subq= join->sj_subselects.front(); - in_subq != in_subq_end && - join->tables + (*in_subq)->unit->first_select()->join->tables < MAX_TABLES; - in_subq++) - { - Item **tree= ((*in_subq)->emb_on_expr_nest == (TABLE_LIST*)1)? - &join->conds : &((*in_subq)->emb_on_expr_nest->on_expr); - if (replace_where_subcondition(join, tree, *in_subq, new Item_int(1), - FALSE)) - DBUG_RETURN(TRUE); /* purecov: inspected */ - } for (in_subq= join->sj_subselects.front(); in_subq != in_subq_end && join->tables + (*in_subq)->unit->first_select()->join->tables < MAX_TABLES; in_subq++) { - if (convert_subq_to_sj(join, *in_subq)) - DBUG_RETURN(TRUE); + bool remove_item= TRUE; + if ((*in_subq)->is_flattenable_semijoin) + { + if (convert_subq_to_sj(join, *in_subq)) + DBUG_RETURN(TRUE); + } + else + { + if (convert_subq_to_jtbm(join, *in_subq, &remove_item)) + DBUG_RETURN(TRUE); + } + if (remove_item) + { + Item **tree= ((*in_subq)->emb_on_expr_nest == (TABLE_LIST*)1)? + &join->conds : &((*in_subq)->emb_on_expr_nest->on_expr); + Item *replace_me= *in_subq; + /* + JTBM: the subquery was already mapped with Item_in_optimizer, so we + should search for that, not for original Item_in_subselect. + TODO: what about delaying that rewrite until here? + */ + if (!(*in_subq)->is_flattenable_semijoin) + { + replace_me= (*in_subq)->optimizer; + } + if (replace_where_subcondition(join, tree, replace_me, new Item_int(1), + FALSE)) + DBUG_RETURN(TRUE); /* purecov: inspected */ + } } skip_conversion: /* @@ -494,7 +750,19 @@ skip_conversion: bool do_fix_fields= !(*in_subq)->substitution->fixed; Item **tree= ((*in_subq)->emb_on_expr_nest == (TABLE_LIST*)1)? &join->conds : &((*in_subq)->emb_on_expr_nest->on_expr); - if (replace_where_subcondition(join, tree, *in_subq, substitute, + + Item *replace_me= *in_subq; + /* + JTBM: the subquery was already mapped with Item_in_optimizer, so we + should search for that, not for original Item_in_subselect. + TODO: what about delaying that rewrite until here? + */ + if (!(*in_subq)->is_flattenable_semijoin) + { + replace_me= (*in_subq)->optimizer; + } + + if (replace_where_subcondition(join, tree, replace_me, substitute, do_fix_fields)) DBUG_RETURN(TRUE); (*in_subq)->substitution= NULL; @@ -505,7 +773,7 @@ skip_conversion: &join->select_lex->prep_where : &((*in_subq)->emb_on_expr_nest->prep_on_expr); - if (replace_where_subcondition(join, tree, *in_subq, substitute, + if (replace_where_subcondition(join, tree, replace_me, substitute, FALSE)) DBUG_RETURN(TRUE); } @@ -517,6 +785,61 @@ skip_conversion: DBUG_RETURN(FALSE); } + +/* + Get #output_rows and scan_time estimates for a "delayed" table. + + SYNOPSIS + get_delayed_table_estimates() + table IN Table to get estimates for + out_rows OUT E(#rows in the table) + scan_time OUT E(scan_time). + startup_cost OUT cost to populate the table. + + DESCRIPTION + Get #output_rows and scan_time estimates for a "delayed" table. By + "delayed" here we mean that the table is filled at the start of query + execution. This means that the optimizer can't use table statistics to + get #rows estimate for it, it has to call this function instead. + + This function is expected to make different actions depending on the nature + of the table. At the moment there is only one kind of delayed tables, + non-flattenable semi-joins. +*/ + +void get_delayed_table_estimates(TABLE *table, + ha_rows *out_rows, + double *scan_time, + double *startup_cost) +{ + Item_in_subselect *item= table->pos_in_table_list->jtbm_subselect; + item->optimize(); + + DBUG_ASSERT(item->engine->engine_type() == + subselect_engine::HASH_SJ_ENGINE); + + subselect_hash_sj_engine *hash_sj_engine= + ((subselect_hash_sj_engine*)item->engine); + JOIN *join= hash_sj_engine->materialize_join; + + double rows= 1; + double read_time= 0.0; + + /* Calculate #rows and cost of join execution */ + for (uint i= join->const_tables; i < join->tables; i++) + { + rows *= join->best_positions[i].records_read; + read_time += join->best_positions[i].read_time; + } + *out_rows= (ha_rows)rows; + *startup_cost= read_time; + /* Calculate cost of scanning the temptable */ + double data_size= rows * hash_sj_engine->tmp_table->s->reclength; + /* Do like in handler::read_time */ + *scan_time= data_size/IO_SIZE + 2; +} + + /** @brief Replaces an expression destructively inside the expression tree of the WHERE clase. @@ -534,6 +857,7 @@ skip_conversion: @return <code>true</code> if there was an error, <code>false</code> if successful. */ + static bool replace_where_subcondition(JOIN *join, Item **expr, Item *old_cond, Item *new_cond, bool do_fix_fields) @@ -769,8 +1093,7 @@ static bool convert_subq_to_sj(JOIN *parent_join, Item_in_subselect *subq_pred) /* 3. Remove the original subquery predicate from the WHERE/ON */ // The subqueries were replaced for Item_int(1) earlier - subq_pred->exec_method= - Item_in_subselect::SEMI_JOIN; // for subsequent executions + subq_pred->exec_method= Item_in_subselect::SEMI_JOIN; // for subsequent executions /*TODO: also reset the 'with_subselect' there. */ /* n. Adjust the parent_join->tables counter */ @@ -887,6 +1210,118 @@ static bool convert_subq_to_sj(JOIN *parent_join, Item_in_subselect *subq_pred) DBUG_RETURN(FALSE); } + +/* + Convert subquery predicate into non-mergeable semi-join nest. + + TODO: + why does this do IN-EXISTS conversion? Can't we unify it with mergeable + semi-joins? currently, convert_subq_to_sj() cannot fail to convert (unless + fatal errors) + + + RETURN + FALSE - Ok + TRUE - Fatal error +*/ + +static bool convert_subq_to_jtbm(JOIN *parent_join, + Item_in_subselect *subq_pred, + bool *remove_item) +{ + SELECT_LEX *parent_lex= parent_join->select_lex; + List<TABLE_LIST> *emb_join_list= &parent_lex->top_join_list; + TABLE_LIST *emb_tbl_nest= NULL; // will change when we learn to handle outer joins + TABLE_LIST *tl; + DBUG_ENTER("convert_subq_to_jtbm"); + + if (subq_pred->setup_engine(TRUE)) + DBUG_RETURN(TRUE); + + if (subq_pred->engine->engine_type() != subselect_engine::HASH_SJ_ENGINE) + { + *remove_item= FALSE; + make_in_exists_conversion(parent_join->thd, parent_join, subq_pred); + DBUG_RETURN(FALSE); + } + *remove_item= TRUE; + + TABLE_LIST *jtbm; + char *tbl_alias; + const char alias_mask[]="<subquery%d>"; + if (!(tbl_alias= (char*)parent_join->thd->calloc(sizeof(alias_mask)+5)) || + !(jtbm= alloc_join_nest(parent_join->thd))) //todo: this is not a join nest! + { + DBUG_RETURN(TRUE); + } + + jtbm->join_list= emb_join_list; + jtbm->embedding= emb_tbl_nest; + jtbm->jtbm_subselect= subq_pred; + jtbm->nested_join= NULL; + + /* Nests do not participate in those 'chains', so: */ + /* jtbm->next_leaf= jtbm->next_local= jtbm->next_global == NULL*/ + emb_join_list->push_back(jtbm); + + /* + Inject the jtbm table into TABLE_LIST::next_leaf list, so that + make_join_statistics() and co. can find it. + */ + for (tl= parent_lex->leaf_tables; tl->next_leaf; tl= tl->next_leaf) ; + tl->next_leaf= jtbm; + + /* + Same as above for TABLE_LIST::next_local chain + (a theory: a next_local chain always starts with ::leaf_tables + because view's tables are inserted after the view) + */ + for (tl= parent_lex->leaf_tables; tl->next_local; tl= tl->next_local) ; + tl->next_local= jtbm; + + /* A theory: no need to re-connect the next_global chain */ + + subselect_hash_sj_engine *hash_sj_engine= + ((subselect_hash_sj_engine*)subq_pred->engine); + jtbm->table= hash_sj_engine->tmp_table; + + jtbm->table->tablenr= parent_join->tables; + jtbm->table->map= table_map(1) << (parent_join->tables); + + parent_join->tables++; + + Item *conds= hash_sj_engine->semi_join_conds; + conds->fix_after_pullout(parent_lex, &conds); + + DBUG_EXECUTE("where", print_where(conds,"SJ-EXPR", QT_ORDINARY);); + + my_snprintf(tbl_alias, sizeof(alias_mask)+5, alias_mask, + hash_sj_engine->materialize_join->select_lex->select_number); + jtbm->alias= tbl_alias; + + /* Inject sj_on_expr into the parent's WHERE or ON */ + if (emb_tbl_nest) + { + DBUG_ASSERT(0); + /*emb_tbl_nest->on_expr= and_items(emb_tbl_nest->on_expr, + sj_nest->sj_on_expr); + emb_tbl_nest->on_expr->fix_fields(parent_join->thd, &emb_tbl_nest->on_expr); + */ + } + else + { + /* Inject into the WHERE */ + parent_join->conds= and_items(parent_join->conds, conds); + parent_join->conds->fix_fields(parent_join->thd, &parent_join->conds); + parent_join->select_lex->where= parent_join->conds; + } + + /* Don't unlink the child subselect, as the subquery will be used. */ + + DBUG_RETURN(FALSE); +} + + static TABLE_LIST *alloc_join_nest(THD *thd) { TABLE_LIST *tbl; @@ -1245,6 +1680,7 @@ bool optimize_semijoin_nests(JOIN *join, table_map all_table_map) DBUG_RETURN(FALSE); } + /* Get estimated record length for semi-join materialization temptable @@ -1301,7 +1737,7 @@ static uint get_tmp_table_rec_length(List<Item> &items) return len; } -//psergey-todo: is the below a kind of table elimination?? + /* Check if table's KEYUSE elements have an eq_ref(outer_tables) candidate @@ -1318,6 +1754,8 @@ static uint get_tmp_table_rec_length(List<Item> &items) Check again if it is feasible to factor common parts with constant table search + Also check if it's feasible to factor common parts with table elimination + RETURN TRUE - There exists an eq_ref(outer-tables) candidate FALSE - Otherwise @@ -1368,6 +1806,7 @@ bool find_eq_ref_candidate(TABLE *table, table_map sj_inner_tables) return FALSE; } + /* Do semi-join optimization step after we've added a new tab to join prefix @@ -2188,6 +2627,9 @@ void fix_semijoin_strategies_for_picked_join_order(JOIN *join) } } +enum_nested_loop_state +end_sj_materialize(JOIN *join, JOIN_TAB *join_tab, bool end_of_records); + /* Setup semi-join materialization strategy for one semi-join nest @@ -2209,10 +2651,11 @@ void fix_semijoin_strategies_for_picked_join_order(JOIN *join) TRUE Error */ -bool setup_sj_materialization(JOIN_TAB *tab) +bool setup_sj_materialization(JOIN_TAB *sjm_tab) { uint i; DBUG_ENTER("setup_sj_materialization"); + JOIN_TAB *tab= sjm_tab->bush_children->start; TABLE_LIST *emb_sj_nest= tab->table->pos_in_table_list->embedding; SJ_MATERIALIZATION_INFO *sjm= emb_sj_nest->sj_mat_info; THD *thd= tab->join->thd; @@ -2240,10 +2683,13 @@ bool setup_sj_materialization(JOIN_TAB *tab) DBUG_RETURN(TRUE); /* purecov: inspected */ sjm->table->file->extra(HA_EXTRA_WRITE_CACHE); sjm->table->file->extra(HA_EXTRA_IGNORE_DUP_KEY); + tab->join->sj_tmp_tables.push_back(sjm->table); tab->join->sjm_info_list.push_back(sjm); sjm->materialized= FALSE; + sjm_tab->table= sjm->table; + if (!sjm->is_sj_scan) { KEY *tmp_key; /* The only index on the temporary table. */ @@ -2256,8 +2702,7 @@ bool setup_sj_materialization(JOIN_TAB *tab) temptable. */ TABLE_REF *tab_ref; - if (!(tab_ref= (TABLE_REF*) thd->alloc(sizeof(TABLE_REF)))) - DBUG_RETURN(TRUE); /* purecov: inspected */ + tab_ref= &sjm_tab->ref; tab_ref->key= 0; /* The only temp table index. */ tab_ref->key_length= tmp_key->key_length; if (!(tab_ref->key_buff= @@ -2290,12 +2735,22 @@ bool setup_sj_materialization(JOIN_TAB *tab) use that information instead. */ cur_ref_buff + null_count, - null_count ? tab_ref->key_buff : 0, + null_count ? cur_ref_buff : 0, cur_key_part->length, tab_ref->items[i], FALSE); cur_ref_buff+= cur_key_part->store_length; } *ref_key= NULL; /* End marker. */ + + /* + We don't ever have guarded conditions for SJM tables, but code at SQL + layer depends on cond_guards array being alloced. + */ + if (!(tab_ref->cond_guards= (bool**) thd->calloc(sizeof(uint*)*tmp_key_parts))) + { + DBUG_RETURN(TRUE); + } + tab_ref->key_err= 1; tab_ref->key_parts= tmp_key_parts; sjm->tab_ref= tab_ref; @@ -2315,6 +2770,8 @@ bool setup_sj_materialization(JOIN_TAB *tab) if (!(sjm->in_equality= create_subq_in_equalities(thd, sjm, emb_sj_nest->sj_subq_pred))) DBUG_RETURN(TRUE); /* purecov: inspected */ + sjm_tab->type= JT_EQ_REF; + sjm_tab->select_cond= sjm->in_equality; } else { @@ -2367,9 +2824,11 @@ bool setup_sj_materialization(JOIN_TAB *tab) then substitute_for_best_equal_field() will change the conditions according to the join order: - it1 - it2 it1.col=it2.col - ot cond(it1.col) + table | attached condition + ------+-------------------- + it1 | + it2 | it1.col=it2.col + ot | cond(it1.col) although we've originally had "SELECT it2.col", conditions attached to subsequent outer tables will refer to it1.col, so SJM-Scan will @@ -2398,8 +2857,18 @@ bool setup_sj_materialization(JOIN_TAB *tab) /* The write_set for source tables must be set up to allow the copying */ bitmap_set_bit(copy_to->table->write_set, copy_to->field_index); } + sjm_tab->type= JT_ALL; + + /* Initialize full scan */ + sjm_tab->read_first_record= join_read_record_no_init; + sjm_tab->read_record.copy_field= sjm->copy_field; + sjm_tab->read_record.copy_field_end= sjm->copy_field + + sjm->sjm_table_cols.elements; + sjm_tab->read_record.read_record= rr_sequential_and_unpack; } + sjm_tab->bush_children->end[-1].next_select= end_sj_materialize; + DBUG_RETURN(FALSE); } @@ -3500,3 +3969,77 @@ static void remove_subq_pushed_predicates(JOIN *join, Item **where) } +/* + Join tab execution startup function. + + SYNOPSIS + join_tab_execution_startup() + tab Join tab to perform startup actions for + + DESCRIPTION + Join tab execution startup function. This is different from + tab->read_first_record in the regard that this has actions that are to be + done once per join execution. + + Currently there are only two possible startup functions, so we have them + both here inside if (...) branches. In future we could switch to function + pointers. + + RETURN + NESTED_LOOP_OK - OK + NESTED_LOOP_ERROR| NESTED_LOOP_KILLED - Error, abort the join execution +*/ + +enum_nested_loop_state join_tab_execution_startup(JOIN_TAB *tab) +{ + Item_in_subselect *in_subs; + DBUG_ENTER("join_tab_execution_startup"); + + if (tab->table->pos_in_table_list && + (in_subs= tab->table->pos_in_table_list->jtbm_subselect)) + { + /* It's a non-merged SJM nest */ + DBUG_ASSERT(in_subs->engine->engine_type() == + subselect_engine::HASH_SJ_ENGINE); + + subselect_hash_sj_engine *hash_sj_engine= + ((subselect_hash_sj_engine*)in_subs->engine); + if (!hash_sj_engine->is_materialized) + { + hash_sj_engine->materialize_join->exec(); + hash_sj_engine->is_materialized= TRUE; + + if (hash_sj_engine->materialize_join->error || tab->join->thd->is_fatal_error) + DBUG_RETURN(NESTED_LOOP_ERROR); + } + } + else if (tab->bush_children) + { + /* It's a merged SJM nest */ + enum_nested_loop_state rc; + JOIN *join= tab->join; + SJ_MATERIALIZATION_INFO *sjm= tab->bush_children->start->emb_sj_nest->sj_mat_info; + JOIN_TAB *join_tab= tab->bush_children->start; + JOIN_TAB *save_return_tab= join->return_tab; + + if (!sjm->materialized) + { + /* + Now run the join for the inner tables. The first call is to run the + join, the second one is to signal EOF (this is essential for some + join strategies, e.g. it will make join buffering flush the records) + */ + if ((rc= sub_select(join, join_tab, FALSE/* no EOF */)) < 0 || + (rc= sub_select(join, join_tab, TRUE/* now EOF */)) < 0) + { + join->return_tab= save_return_tab; + DBUG_RETURN(rc); /* it's NESTED_LOOP_(ERROR|KILLED)*/ + } + join->return_tab= save_return_tab; + sjm->materialized= TRUE; + } + } + + DBUG_RETURN(NESTED_LOOP_OK); +} + diff --git a/sql/opt_subselect.h b/sql/opt_subselect.h index 47d85d5c38d..4d89609e1a8 100644 --- a/sql/opt_subselect.h +++ b/sql/opt_subselect.h @@ -1,4 +1,6 @@ -/* */ +/* + Semi-join subquery optimization code definitions +*/ #ifdef USE_PRAGMA_INTERFACE #pragma interface /* gcc class implementation */ @@ -366,4 +368,10 @@ int clear_sj_tmp_tables(JOIN *join); int rewrite_to_index_subquery_engine(JOIN *join); +void get_delayed_table_estimates(TABLE *table, + ha_rows *out_rows, + double *scan_time, + double *startup_cost); + +enum_nested_loop_state join_tab_execution_startup(JOIN_TAB *tab); diff --git a/sql/sql_base.cc b/sql/sql_base.cc index 530ebf85955..e6331f065f0 100644 --- a/sql/sql_base.cc +++ b/sql/sql_base.cc @@ -7778,6 +7778,17 @@ bool setup_tables(THD *thd, Name_resolution_context *context, if (res) DBUG_RETURN(1); } + if (table_list->jtbm_subselect) + { + Item *item= table_list->jtbm_subselect; + if (item->fix_fields(thd, &item)) + { + my_error(ER_TOO_MANY_TABLES,MYF(0),MAX_TABLES); + DBUG_RETURN(1); + } + DBUG_ASSERT(item == table_list->jtbm_subselect); + table_list->jtbm_subselect->setup_engine(FALSE); + } } /* Precompute and store the row types of NATURAL/USING joins. */ diff --git a/sql/sql_class.cc b/sql/sql_class.cc index 084e2c8d78c..23bf26ce6b1 100644 --- a/sql/sql_class.cc +++ b/sql/sql_class.cc @@ -3033,8 +3033,7 @@ bool select_dumpvar::send_eof() } -bool -select_materialize_with_stats:: +bool select_materialize_with_stats:: create_result_table(THD *thd_arg, List<Item> *column_types, bool is_union_distinct, ulonglong options, const char *table_alias, bool bit_fields_as_long) diff --git a/sql/sql_join_cache.cc b/sql/sql_join_cache.cc index e3171333bf5..be1cf310078 100644 --- a/sql/sql_join_cache.cc +++ b/sql/sql_join_cache.cc @@ -33,7 +33,7 @@ #define NO_MORE_RECORDS_IN_BUFFER (uint)(-1) - +void save_or_restore_used_tabs(JOIN_TAB *join_tab, bool save); /***************************************************************************** * Join cache module ******************************************************************************/ @@ -138,50 +138,52 @@ uint add_table_data_fields_to_join_cache(JOIN_TAB *tab, return len; } -/* - Get the next table whose records are stored in the join buffer of this cache - - SYNOPSIS - get_next_table() - tab the table for which the next table is to be returned - - DESCRIPTION - For a given table whose records are stored in this cache the function - returns the next such table if there is any. - The function takes into account that the tables whose records are - are stored in the same cache now can interleave with tables from - materialized semijoin subqueries. - - TODO - This function should be modified/simplified after the new code for - materialized semijoins is merged. - - RETURN - The next join table whose records are stored in the buffer of this cache - if such table exists, 0 - otherwise -*/ - -JOIN_TAB *JOIN_CACHE::get_next_table(JOIN_TAB *tab) -{ - - if (++tab == join_tab) - return NULL; - if (join_tab->first_sjm_sibling) - return tab; - uint i= tab-join->join_tab; - /* - Temporary measure before MWL#90 refactorings are there: if 'tab' is at upper - level (i.e. it's not inside an SJM nest), still include into the join buffer - the tables from within SJM nest. We might need the subquery's select list - columns, because SJ-Materialization-Scan upacks data to those. - - while (sj_is_materialize_strategy(join->best_positions[i].sj_strategy) && - i < join->tables) - i+= join->best_positions[i].n_sj_tables; - - */ - return join->join_tab+i < join_tab ? join->join_tab+i : NULL; -} +JOIN_TAB *next_linear_tab(JOIN* join, JOIN_TAB* tab, bool include_bush_roots); + +// /* +// Get the next table whose records are stored in the join buffer of this cache +// +// SYNOPSIS +// get_next_table() +// tab the table for which the next table is to be returned +// +// DESCRIPTION +// For a given table whose records are stored in this cache the function +// returns the next such table if there is any. +// The function takes into account that the tables whose records are +// are stored in the same cache now can interleave with tables from +// materialized semijoin subqueries. +// +// TODO +// This function should be modified/simplified after the new code for +// materialized semijoins is merged. +// +// RETURN +// The next join table whose records are stored in the buffer of this cache +// if such table exists, 0 - otherwise +// */ +// +// JOIN_TAB *JOIN_CACHE::get_next_table(JOIN_TAB *tab) +// { +// +// if (++tab == join_tab) +// return NULL; +// if (join_tab->first_sjm_sibling) +// return tab; +// uint i= tab-join->join_tab; +// /* +// Temporary measure before MWL#90 refactorings are there: if 'tab' is at upper +// level (i.e. it's not inside an SJM nest), still include into the join buffer +// the tables from within SJM nest. We might need the subquery's select list +// columns, because SJ-Materialization-Scan upacks data to those. +// +// while (sj_is_materialize_strategy(join->best_positions[i].sj_strategy) && +// i < join->tables) +// i+= join->best_positions[i].n_sj_tables; +// +// */ +// return join->join_tab+i < join_tab ? join->join_tab+i : NULL; +// } /* @@ -203,12 +205,38 @@ JOIN_TAB *JOIN_CACHE::get_next_table(JOIN_TAB *tab) void JOIN_CACHE::calc_record_fields() { + JOIN_TAB *tab; +/** +psergey-merge: was: JOIN_TAB *tab = prev_cache ? prev_cache->join_tab : (join_tab->first_sjm_sibling ? join_tab->first_sjm_sibling : join->join_tab+join->const_tables); - tables= join_tab-tab; - +**/ + if (prev_cache) + tab= prev_cache->join_tab; + else + { + if (join_tab->bush_root_tab) + { + /* + If the tab we're attached to is inside an SJM-nest, start from the + first tab in that SJM nest + */ + tab= join_tab->bush_root_tab->bush_children->start; + } + else + { + /* + The tab we're attached to is not inside an SJM-nest. Start from the + first non-const table. + */ + tab= join->join_tab + join->const_tables; + } + } + start_tab= tab; + //tables= join_tab-tab; + //tables= 0; fields= 0; blobs= 0; flag_fields= 0; @@ -216,7 +244,12 @@ void JOIN_CACHE::calc_record_fields() data_field_ptr_count= 0; referenced_fields= 0; - for ( ; tab ; tab= get_next_table(tab)) + //psergey-merge: for ( ; tab ; tab= get_next_table(tab)) + /* + The following loop will get inside SJM nests, because data may be unpacked + to sjm-inner tables. + */ + for ( ; tab != join_tab ; tab= next_linear_tab(join, tab, TRUE)) { tab->calc_used_field_length(FALSE); flag_fields+= test(tab->used_null_fields || tab->used_uneven_bit_fields); @@ -225,6 +258,7 @@ void JOIN_CACHE::calc_record_fields() blobs+= tab->used_blobs; fields+= tab->check_rowid_field(); + //tables++; } if ((with_match_flag= join_tab->use_match_flag())) flag_fields++; @@ -245,7 +279,8 @@ void JOIN_CACHE::calc_record_fields() 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. + 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 @@ -269,8 +304,14 @@ void JOIN_CACHE::collect_info_on_key_args() cache= this; do { - for (tab= cache->join_tab-cache->tables; tab ; - tab= cache->get_next_table(tab)) + /* + psergey-merge: + tab"=start_tab" is not a correct substitute for + "cache->join_tab - cache->tables". + */ + for (tab= cache->start_tab; tab != cache->join_tab; tab= next_linear_tab(join, tab, TRUE)) + //for (tab= cache->join_tab-cache->tables; tab ; + // tab= cache->get_next_table(tab)) { uint key_args; bitmap_clear_all(&tab->table->tmp_set); @@ -386,7 +427,9 @@ void JOIN_CACHE::create_flag_fields() ©); /* Create fields for all null bitmaps and null row flags that are needed */ - for (tab= join_tab-tables; tab; tab= get_next_table(tab)) +// // psergey-merge: for (tab= join_tab-tables; tab; tab= get_next_table(tab)) + //for (tab= join_tab-tables; tab < join_tab; tab++) + for (tab= start_tab; tab != join_tab; tab= next_linear_tab(join, tab, TRUE)) { TABLE *table= tab->table; @@ -473,8 +516,11 @@ void JOIN_CACHE::create_key_arg_fields() while (ext_key_arg_cnt) { cache= cache->prev_cache; - for (tab= cache->join_tab-cache->tables; tab; - tab= cache->get_next_table(tab)) + //for (tab= cache->join_tab-cache->tables; tab; + // tab= cache->get_next_table(tab)) + //psergey-merge: ^ + for (tab= cache->start_tab; tab != cache->join_tab; + tab= next_linear_tab(join, tab, TRUE)) { CACHE_FIELD *copy_end; MY_BITMAP *key_read_set= &tab->table->tmp_set; @@ -524,7 +570,8 @@ void JOIN_CACHE::create_key_arg_fields() /* 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; tab= get_next_table(tab)) + for (tab= start_tab; tab != join_tab; tab= next_linear_tab(join, tab, TRUE)) + //for (tab= join_tab-tables; tab; tab= get_next_table(tab)) { length+= add_table_data_fields_to_join_cache(tab, &tab->table->tmp_set, &data_field_count, ©, @@ -573,14 +620,16 @@ void JOIN_CACHE::create_key_arg_fields() none */ -void JOIN_CACHE:: create_remaining_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; - for (tab= join_tab-tables; tab; tab= get_next_table(tab)) + for (tab= start_tab; tab != join_tab; tab= next_linear_tab(join, tab, TRUE)) +//psergey-merge: for (tab= join_tab-tables; tab; tab= get_next_table(tab)) + //for (tab= join_tab-tables; tab < join_tab; tab++) { MY_BITMAP *rem_field_set; TABLE *table= tab->table; @@ -737,7 +786,8 @@ ulong JOIN_CACHE::get_min_join_buffer_size() if (!min_buff_size) { ulong len= 0; - for (JOIN_TAB *tab= join_tab-tables; tab < join_tab; tab++) + //for (JOIN_TAB *tab= join_tab-tables; tab < join_tab; tab++) + for (JOIN_TAB *tab= start_tab; tab != join_tab; tab= next_linear_tab(join, tab, TRUE)) 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; @@ -785,7 +835,8 @@ ulong JOIN_CACHE::get_max_join_buffer_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++) + //for (JOIN_TAB *tab= join_tab-tables; tab < join_tab; tab++) + for (JOIN_TAB *tab= start_tab; tab != join_tab; tab= next_linear_tab(join, tab, TRUE)) len+= tab->get_used_fieldlength(); len+= get_record_max_affix_length(); avg_record_length= len; @@ -853,7 +904,11 @@ int JOIN_CACHE::alloc_buffer() 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++) +//psergey-merge: for (tab= join->join_tab+join->const_tables; tab <= join_tab; tab++) +// for (tab= cache->join_tab-cache->tables; tab < cache->join_tab ; tab++) +// (fixed) + for (tab= join->join_tab + join->const_tables; tab!= join_tab; + tab= next_linear_tab(join, tab, TRUE)) { cache= tab->cache; if (cache) @@ -984,6 +1039,7 @@ int JOIN_CACHE::realloc_buffer() */ int JOIN_CACHE::init() +//psergey-merge:wtf is this here: for (tab= start_tab; tab != join_tab; tab= next_linear_tab(join, tab, TRUE)) { DBUG_ENTER("JOIN_CACHE::init"); @@ -2143,8 +2199,12 @@ enum_nested_loop_state JOIN_CACHE::join_matching_records(bool skip_last) } /* Prepare to retrieve all records of the joined table */ - if ((error= join_tab_scan->open())) + if ((error= join_tab_scan->open())) //psergey-merge: TODO: look what it does inside? status-reset should use next_linear_tab goto finish; /* psergey-note: if this returns error, we will assert in net_send_statement() */ + + if ((rc= join_tab_execution_startup(join_tab)) < 0) + goto finish; + while (!(error= join_tab_scan->next())) { @@ -3179,12 +3239,23 @@ uint JOIN_CACHE_HASHED::get_next_key(uchar ** key) int JOIN_TAB_SCAN::open() { - JOIN_TAB *bound= join_tab-cache->tables; + //psergey-merge: todo: check the below: + //JOIN_TAB *bound= join_tab-cache->tables; + +#if 0 + JOIN_TAB *bound= cache->start_tab; + + // psergey-todo-merge: can we really iterate backwards? + // Q: is there really a need to iterate backwards? + for (JOIN_TAB *tab= join_tab-1; tab != bound && !tab->cache; tab--) { tab->status= tab->table->status; tab->table->status= 0; } +#endif + save_or_restore_used_tabs(join_tab, FALSE); + is_first_record= TRUE; return join_init_read_record(join_tab); } @@ -3239,6 +3310,40 @@ int JOIN_TAB_SCAN::next() } +void save_or_restore_used_tabs(JOIN_TAB *join_tab, bool save) +{ + JOIN_TAB *first= join_tab->bush_root_tab? + join_tab->bush_root_tab->bush_children->start : + join_tab->join->join_tab + join_tab->join->const_tables; + + for (JOIN_TAB *tab= join_tab-1; tab != first && !tab->cache; tab--) + { + if (tab->bush_children) + { + for (JOIN_TAB *child= tab->bush_children->start; + child != tab->bush_children->end; + child++) + { + if (save) + child->table->status= child->status; + { + tab->status= tab->table->status; + tab->table->status= 0; + } + } + } + + if (save) + tab->table->status= tab->status; + else + { + tab->status= tab->table->status; + tab->table->status= 0; + } + } +} + + /* Perform finalizing actions for a scan over the table records @@ -3255,9 +3360,12 @@ int JOIN_TAB_SCAN::next() void JOIN_TAB_SCAN::close() { - JOIN_TAB *bound= join_tab-cache->tables; +#if 0 + JOIN_TAB *bound= join_tab - cache->tables; for (JOIN_TAB *tab= join_tab-1; tab != bound && !tab->cache; tab--) tab->table->status= tab->status; +#endif + save_or_restore_used_tabs(join_tab, TRUE); } @@ -3657,12 +3765,16 @@ int JOIN_TAB_SCAN_MRR::open() /* Dynamic range access is never used with BKA */ DBUG_ASSERT(join_tab->use_quick != 2); - JOIN_TAB *bound= join_tab-cache->tables; +/* +psergey-merge: done? + JOIN_TAB *bound= join_tab - cache->tables; for (JOIN_TAB *tab= join_tab-1; tab != bound && !tab->cache; tab--) { tab->status= tab->table->status; tab->table->status= 0; } +*/ + save_or_restore_used_tabs(join_tab, FALSE); init_mrr_buff(); diff --git a/sql/sql_join_cache.h b/sql/sql_join_cache.h index 546067fad24..e08f7eb7a52 100644 --- a/sql/sql_join_cache.h +++ b/sql/sql_join_cache.h @@ -125,7 +125,15 @@ 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. */ - uint tables; + // psergey-merge: gone: uint tables; + /* + JOIN_TAB of the first table that can have it's fields in the join cache. + That is, tables in the [start_tab, tab) range can have their fields in the + join cache. + If a join tab in the range represents an SJM-nest, then all tables from the + nest can have their fields in the join cache, too. + */ + JOIN_TAB *start_tab; /* The total number of flag and data fields that can appear in a record @@ -647,7 +655,7 @@ public: buff= 0; } - JOIN_TAB *get_next_table(JOIN_TAB *tab); + // JOIN_TAB *get_next_table(JOIN_TAB *tab); friend class JOIN_CACHE_HASHED; friend class JOIN_CACHE_BNL; diff --git a/sql/sql_select.cc b/sql/sql_select.cc index f86d4fc2781..3b1bea35ecd 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -100,7 +100,7 @@ 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); -static void update_depend_map(JOIN *join, ORDER *order); +static void update_depend_map_for_order(JOIN *join, ORDER *order); static ORDER *remove_const(JOIN *join,ORDER *first_order,COND *cond, bool change_list, bool *simple_order); static int return_zero_rows(JOIN *join, select_result *res,TABLE_LIST *tables, @@ -238,12 +238,13 @@ static void add_group_and_distinct_keys(JOIN *join, JOIN_TAB *join_tab); void get_partial_join_cost(JOIN *join, uint idx, double *read_time_arg, double *record_count_arg); static uint make_join_orderinfo(JOIN *join); -static int -join_read_record_no_init(JOIN_TAB *tab); Item_equal *find_item_equal(COND_EQUAL *cond_equal, Field *field, bool *inherited_fl); +JOIN_TAB *first_linear_tab(JOIN *join, bool after_const_tables); +JOIN_TAB *next_linear_tab(JOIN* join, JOIN_TAB* tab, bool include_bush_roots); + /** This handles SELECT with and without UNION. */ @@ -1034,47 +1035,69 @@ JOIN::optimize() /* Perform the optimization on fields evaluation mentioned above for all on expressions. - */ - for (JOIN_TAB *tab= join_tab + const_tables; tab < join_tab + tables ; tab++) + */ + { - if (*tab->on_expr_ref) + List_iterator<JOIN_TAB_RANGE> it(join_tab_ranges); + JOIN_TAB_RANGE *jt_range; + uint first_tab_offs= const_tables; + while ((jt_range= it++)) { - *tab->on_expr_ref= substitute_for_best_equal_field(*tab->on_expr_ref, - tab->cond_equal, - map2table); - (*tab->on_expr_ref)->update_used_tables(); + for (JOIN_TAB *tab= jt_range->start + first_tab_offs; + tab < jt_range->end; tab++) + { + if (*tab->on_expr_ref) + { + *tab->on_expr_ref= substitute_for_best_equal_field(*tab->on_expr_ref, + tab->cond_equal, + map2table); + (*tab->on_expr_ref)->update_used_tables(); + } + } + first_tab_offs= 0; } - - } /* Perform the optimization on fields evaliation mentioned above for all used ref items. */ - for (JOIN_TAB *tab= join_tab + const_tables; tab < join_tab + tables; tab++) + //for (JOIN_TAB *tab= join_tab + const_tables; tab < join_tab + tables; tab++) + //{ { - for (uint i=0; i < tab->ref.key_parts; i++) + List_iterator<JOIN_TAB_RANGE> it(join_tab_ranges); + JOIN_TAB_RANGE *jt_range; + uint first_tab_offs= const_tables; + while ((jt_range= it++)) { - - Item **ref_item_ptr= tab->ref.items+i; - Item *ref_item= *ref_item_ptr; - COND_EQUAL *equals= tab->first_inner ? tab->first_inner->cond_equal : - cond_equal; - ref_item= substitute_for_best_equal_field(ref_item, equals, map2table); - ref_item->update_used_tables(); - if (*ref_item_ptr != ref_item) + for (JOIN_TAB *tab= jt_range->start + first_tab_offs; + tab < jt_range->end; tab++) { - *ref_item_ptr= ref_item; - Item *item= ref_item->real_item(); - if (item->type() == Item::FIELD_ITEM) + for (uint i=0; i < tab->ref.key_parts; i++) { - store_key_field *key_copy= (store_key_field *) tab->ref.key_copy[i]; - key_copy->change_source_field((Item_field *) item); + + Item **ref_item_ptr= tab->ref.items+i; + Item *ref_item= *ref_item_ptr; + COND_EQUAL *equals= tab->first_inner ? tab->first_inner->cond_equal : + cond_equal; + ref_item= substitute_for_best_equal_field(ref_item, equals, map2table); + ref_item->update_used_tables(); + if (*ref_item_ptr != ref_item) + { + *ref_item_ptr= ref_item; + Item *item= ref_item->real_item(); + if (item->type() == Item::FIELD_ITEM) + { + store_key_field *key_copy= (store_key_field *) tab->ref.key_copy[i]; + key_copy->change_source_field((Item_field *) item); + } + } } } + first_tab_offs= 0; } - } + } + //} if (conds && const_table_map != found_const_table_map && (select_options & SELECT_DESCRIBE)) @@ -1347,8 +1370,11 @@ JOIN::optimize() */ if (need_tmp || select_distinct || group_list || order) { - for (uint i = const_tables; i < tables; i++) - join_tab[i].table->prepare_for_position(); + for (uint i= 0; i < tables; i++) + { + if (!(table[i]->map & const_table_map)) + table[i]->prepare_for_position(); + } } DBUG_EXECUTE("info",TEST_join(this);); @@ -1599,9 +1625,12 @@ bool JOIN::setup_subquery_caches() if (conds) conds= conds->transform(&Item::expr_cache_insert_transformer, (uchar*) thd); - for (JOIN_TAB *tab= join_tab + const_tables; - tab < join_tab + tables ; - tab++) + for (JOIN_TAB *tab= first_linear_tab(this, TRUE); + tab; + tab= next_linear_tab(this, tab, TRUE)) + //for (JOIN_TAB *tab= join_tab + const_tables; + // tab < join_tab + tables ; + // tab++) { if (tab->select_cond) tab->select_cond= @@ -2341,7 +2370,7 @@ JOIN::exec() WHERE clause for any tables after the sorted one. */ JOIN_TAB *curr_table= &curr_join->join_tab[curr_join->const_tables+1]; - JOIN_TAB *end_table= &curr_join->join_tab[curr_join->tables]; + JOIN_TAB *end_table= &curr_join->join_tab[curr_join->top_jtrange_tables]; for (; curr_table < end_table ; curr_table++) { /* @@ -2709,7 +2738,7 @@ bool JOIN::setup_subquery_materialization() { Item_in_subselect *in_subs= (Item_in_subselect*) subquery_predicate; if (in_subs->exec_method == Item_in_subselect::MATERIALIZATION && - in_subs->setup_engine()) + in_subs->setup_engine(FALSE)) return TRUE; } } @@ -2795,9 +2824,10 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, DBUG_ENTER("make_join_statistics"); table_count=join->tables; - stat=(JOIN_TAB*) join->thd->calloc(sizeof(JOIN_TAB)*table_count); + + stat=(JOIN_TAB*) join->thd->calloc(sizeof(JOIN_TAB)*(table_count)); stat_ref=(JOIN_TAB**) join->thd->alloc(sizeof(JOIN_TAB*)*MAX_TABLES); - table_vector=(TABLE**) join->thd->alloc(sizeof(TABLE*)*(table_count*2)); + table_vector=(TABLE**) join->thd->alloc(sizeof(TABLE*)*((table_count)*2)); if (!stat || !stat_ref || !table_vector) DBUG_RETURN(1); // Eom /* purecov: inspected */ @@ -2806,7 +2836,7 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, stat_end=stat+table_count; found_const_table_map= all_table_map=0; const_count=0; - + for (s= stat, i= 0; tables; s++, tables= tables->next_leaf, i++) @@ -2830,24 +2860,27 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, table->reginfo.join_tab=s; table->reginfo.not_exists_optimize=0; bzero((char*) table->const_key_parts, sizeof(key_part_map)*table->s->keys); - all_table_map|= table->map; + all_table_map|= s->table->map; s->join=join; s->info=0; // For describe + s->bush_root_tab= NULL; s->dependent= tables->dep_tables; s->key_dependent= 0; if (tables->schema_table) table->file->stats.records= 2; table->quick_condition_rows= table->file->stats.records; - + s->on_expr_ref= &tables->on_expr; if (*s->on_expr_ref) { /* s is the only inner table of an outer join */ #ifdef WITH_PARTITION_STORAGE_ENGINE - if ((!table->file->stats.records || table->no_partitions_used) && !embedding) + if (!table->is_filled_at_execution() && + (!table->file->stats.records || table->no_partitions_used) && !embedding) #else - if (!table->file->stats.records && !embedding) + if (!table->is_filled_at_execution() && + !table->file->stats.records && !embedding) #endif { // Empty table s->dependent= 0; // Ignore LEFT JOIN depend. @@ -2881,7 +2914,8 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, #else const bool no_partitions_used= FALSE; #endif - if ((table->s->system || table->file->stats.records <= 1 || + if (!table->is_filled_at_execution() && + (table->s->system || table->file->stats.records <= 1 || no_partitions_used) && !s->dependent && (table->file->ha_table_flags() & HA_STATS_RECORDS_IS_EXACT) && @@ -2891,6 +2925,7 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, no_rows_const_tables |= table->map; } } + stat_vector[i]=0; join->outer_join=outer_join; @@ -2993,6 +3028,9 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, { table=s->table; + if (table->is_filled_at_execution()) + continue; + /* If equi-join condition by a key is null rejecting and after a substitution of a const table the key value happens to be null @@ -3144,15 +3182,30 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, for (s=stat ; s < stat_end ; s++) { + s->startup_cost= 0; if (s->type == JT_SYSTEM || s->type == JT_CONST) { /* Only one matching row */ - s->found_records=s->records=s->read_time=1; s->worst_seeks=1.0; + s->found_records= s->records= 1; + s->read_time=1.0; + s->worst_seeks=1.0; continue; } /* Approximate found rows and time to read them */ - s->found_records=s->records=s->table->file->stats.records; - s->read_time=(ha_rows) s->table->file->scan_time(); + + if (s->table->is_filled_at_execution()) + { + get_delayed_table_estimates(s->table, &s->records, &s->read_time, + &s->startup_cost); + s->found_records= s->records; + table->quick_condition_rows=s->records; + } + else + { + s->found_records= s->records= s->table->file->stats.records; + s->read_time= s->table->file->scan_time(); + } + /* Set a max range of how many seeks we can expect when using keys @@ -3175,10 +3228,11 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, Don't do range analysis if we're on the inner side of an outer join (2). Do range analysis if we're on the inner side of a semi-join (3). */ - if (!s->const_keys.is_clear_all() && // (1) - (!s->table->pos_in_table_list->embedding || // (2) - (s->table->pos_in_table_list->embedding && // (3) - s->table->pos_in_table_list->embedding->sj_on_expr))) // (3) + if (!s->const_keys.is_clear_all() && // (1) + (!s->table->pos_in_table_list->embedding || // (2) + (s->table->pos_in_table_list->embedding && // (3) + s->table->pos_in_table_list->embedding->sj_on_expr)) && // (3) + !s->table->is_filled_at_execution()) { ha_rows records; SQL_SELECT *select; @@ -3216,7 +3270,7 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, if (records != HA_POS_ERROR) { s->found_records=records; - s->read_time= (ha_rows) (s->quick ? s->quick->read_time : 0.0); + s->read_time= s->quick ? s->quick->read_time : 0.0; } delete select; } @@ -3227,7 +3281,7 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, join->join_tab=stat; join->map2table=stat_ref; - join->table= join->all_tables=table_vector; + join->table= table_vector; join->const_tables=const_count; join->found_const_table_map=found_const_table_map; @@ -4389,7 +4443,7 @@ static void optimize_keyuse(JOIN *join, DYNAMIC_ARRAY *keyuse_array) for (tablenr=0 ; ! (map & 1) ; map>>=1, tablenr++) ; if (map == 1) // Only one table { - TABLE *tmp_table=join->all_tables[tablenr]; + TABLE *tmp_table=join->table[tablenr]; keyuse->ref_table_rows= max(tmp_table->file->stats.records, 100); } } @@ -4894,8 +4948,9 @@ best_access_path(JOIN *join, else tmp= best_time; // Do nothing } - loose_scan_opt.check_ref_access_part2(key, start_key, records, tmp); + tmp += s->startup_cost; + loose_scan_opt.check_ref_access_part2(key, start_key, records, tmp); } /* not ft_key */ if (tmp + 0.0001 < best_time - records/(double) TIME_FOR_COMPARE) { @@ -4937,13 +4992,19 @@ best_access_path(JOIN *join, Since we have a 'ref' access path, and FORCE INDEX instructs us to choose it over ALL/index, there is no need to consider a full table scan. + (5) Non-flattenable semi-joins: don't consider doing a scan of temporary + table if we had an option to make lookups into it. In real-world cases, + lookups are cheaper than full scans, but when the table is small, they + can be [considered to be] more expensive, which causes lookups not to + be used for cases with small datasets, which is annoying. */ if ((records >= s->found_records || best > s->read_time) && // (1) !(s->quick && best_key && s->quick->index == best_key->key && // (2) best_max_key_part >= s->table->quick_key_parts[best_key->key]) &&// (2) !((s->table->file->ha_table_flags() & HA_TABLE_SCAN_ON_INDEX) && // (3) ! s->table->covering_keys.is_clear_all() && best_key && !s->quick) &&// (3) - !(s->table->force_index && best_key && !s->quick)) // (4) + !(s->table->force_index && best_key && !s->quick) && // (4) + !(best_key && s->table->pos_in_table_list->jtbm_subselect)) // (5) { // Check full join ha_rows rnd_records= s->found_records; /* @@ -4990,8 +5051,7 @@ best_access_path(JOIN *join, } else { - /* Estimate cost of reading table. */ - tmp= s->table->file->scan_time(); + tmp= s->read_time; if ((s->table->map & join->outer_join) || disable_jbuf) // Can't use join cache { /* @@ -5020,6 +5080,7 @@ best_access_path(JOIN *join, } } + tmp += s->startup_cost; /* We estimate the cost of evaluating WHERE clause for found records as record_count * rnd_records / TIME_FOR_COMPARE. This cost plus @@ -5042,7 +5103,7 @@ best_access_path(JOIN *join, join->outer_join))); } } - + /* Update the cost information for the current partial plan */ pos->records_read= records; pos->read_time= best; @@ -5995,8 +6056,8 @@ void JOIN_TAB::calc_used_field_length(bool max_fl) set_if_smaller(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? + TODO: why we don't count here rowid that we might need to store when + using DuplicateElimination? */ used_fields=fields; used_fieldlength=rec_length; @@ -6181,6 +6242,102 @@ prev_record_reads(JOIN *join, uint idx, table_map found_ref) } +JOIN_TAB *first_linear_tab(JOIN *join, bool after_const_tables) +{ + JOIN_TAB *first= join->join_tab; + if (after_const_tables) + first+= join->const_tables; + if (first < join->join_tab + join->top_jtrange_tables) + return first; + return NULL; +} + + +/* + A helper function to loop over all join's join_tab in sequential fashion + + DESCRIPTION + Depending on include_bush_roots parameter, JOIN_TABS that represent + SJM-scan/lookups are produced or omitted. + + SJM-Bush children are returned right after (or in place of) their container + join tab (TODO: does anybody depend on this? A: make_join_readinfo() seems + to.) +*/ + +JOIN_TAB *next_linear_tab(JOIN* join, JOIN_TAB* tab, bool include_bush_roots) +{ + if (include_bush_roots && tab->bush_children) + return tab->bush_children->start; + + DBUG_ASSERT(!tab->last_leaf_in_bush || tab->bush_root_tab); + if (tab->last_leaf_in_bush) + tab= tab->bush_root_tab; + + if (tab->bush_root_tab) + return ++tab; + + if (++tab == join->join_tab + join->top_jtrange_tables) + return NULL; + + if (!include_bush_roots && tab->bush_children) + tab= tab->bush_children->start; + + return tab; +} + + +/* + A helper function to iterate over all join tables in bush-children-first order + + DESCRIPTION + + For example, for this join plan + + ot1 ot2 sjm ot3 + | +--------+ + | | + it1 it2 it3 + + + the function will return + + ot1-ot2-it1-it2-it3-sjm-ot3 ... + +*/ + +JOIN_TAB *next_depth_first_tab(JOIN* join, JOIN_TAB* tab) +{ + bool start= FALSE; + if (tab == NULL) + { + /* This means we're starting the enumeration */ + if (join->const_tables == join->top_jtrange_tables) + return NULL; + + tab= join->join_tab + join->const_tables; + start= TRUE; + } + + if (tab->last_leaf_in_bush) + return tab->bush_root_tab; + + /* Move to next tab in the array we're traversing*/ + if (!start) + tab++; + + if (tab == join->join_tab_ranges.head()->end) + return NULL; /* End */ + + if (tab->bush_children) + return tab->bush_children->start; + + return tab; +} + + +static Item * const null_ptr= NULL; + /* Set up join struct according to the picked join order in @@ -6195,7 +6352,12 @@ prev_record_reads(JOIN *join, uint idx, table_map found_ref) fix_semijoin_strategies_for_picked_join_order) - create join->join_tab array and put there the JOIN_TABs in the join order - create data structures describing ref access methods. - + + NOTE + In this function we switch from pre-join-optimization JOIN_TABs to + post-join-optimization JOIN_TABs. This is achieved by copying the entire + JOIN_TAB objects. + RETURN FALSE OK TRUE Out of memory @@ -6204,7 +6366,7 @@ prev_record_reads(JOIN *join, uint idx, table_map found_ref) static bool get_best_combination(JOIN *join) { - uint i,tablenr; + uint tablenr; table_map used_tables; JOIN_TAB *join_tab,*j; KEYUSE *keyuse; @@ -6222,11 +6384,74 @@ get_best_combination(JOIN *join) used_tables= OUTER_REF_TABLE_BIT; // Outer row is already read fix_semijoin_strategies_for_picked_join_order(join); - + + JOIN_TAB_RANGE *root_range= new JOIN_TAB_RANGE; + root_range->start= join->join_tab; + /* root_range->end will be set later */ + join->join_tab_ranges.empty(); + join->join_tab_ranges.push_back(root_range); + + JOIN_TAB *sjm_nest_end= NULL; + JOIN_TAB *sjm_saved_tab; /* protected by sjm_nest_end */ + for (j=join_tab, tablenr=0 ; tablenr < table_count ; tablenr++,j++) { TABLE *form; + POSITION *cur_pos= &join->best_positions[tablenr]; + if (cur_pos->sj_strategy == SJ_OPT_MATERIALIZE || + cur_pos->sj_strategy == SJ_OPT_MATERIALIZE_SCAN) + { + /* + Ok, we've entered an SJ-Materialization semi-join (note that this can't + be done recursively, semi-joins are not allowed to be nested). + */ + /* + 1. Put into main join order a JOIN_TAB that represents a lookup or scan + in the temptable. + // TODO: record this join_tab to be processed by + // setup_semijoin_elimination? + */ + bzero(j, sizeof(JOIN_TAB)); + j->join= join; + j->table= NULL; //temporary way to tell SJM tables from others. + j->ref.key = -1; + j->ref.key_parts=0; + j->loosescan_match_tab= NULL; //non-nulls will be set later + j->use_join_cache= FALSE; + j->on_expr_ref= (Item**) &null_ptr; + j->cache= NULL; + j->keys= key_map(1); // The unique index is always in 'possible keys' in EXPLAIN + + + /* + 2. Proceed with processing SJM nest's join tabs, putting them into the + sub-order + */ + SJ_MATERIALIZATION_INFO *sjm= cur_pos->table->emb_sj_nest->sj_mat_info; + j->records= j->records_read= (ha_rows)(sjm->is_sj_scan? sjm->rows : 1); + JOIN_TAB *jt= (JOIN_TAB*)join->thd->alloc(sizeof(JOIN_TAB) * sjm->tables); + JOIN_TAB_RANGE *jt_range= new JOIN_TAB_RANGE; + jt_range->start= jt; + jt_range->end= jt + sjm->tables; + //sjm->jt_range= jt_range; + join->join_tab_ranges.push_back(jt_range); + j->bush_children= jt_range; + j->bush_root_tab= NULL; //note: a lot of code depends on bush nodes not containing one another + j->quick= NULL; + sjm_nest_end= jt + sjm->tables; + sjm_saved_tab= j; + root_range->end= j+1; + + j= jt; + //goto loop_end_not_table; + } + *j= *join->best_positions[tablenr].table; + + if (sjm_nest_end) + j->bush_root_tab= sjm_saved_tab; + else + root_range->end= j+1; form=join->table[tablenr]=j->table; used_tables|= form->map; form->reginfo.join_tab=j; @@ -6234,14 +6459,14 @@ get_best_combination(JOIN *join) form->reginfo.not_exists_optimize=0; // Only with LEFT JOIN DBUG_PRINT("info",("type: %d", j->type)); if (j->type == JT_CONST) - continue; // Handled in make_join_stat.. + goto loop_end; // Handled in make_join_stat.. j->loosescan_match_tab= NULL; //non-nulls will be set later j->ref.key = -1; j->ref.key_parts=0; if (j->type == JT_SYSTEM) - continue; + goto loop_end; if (j->keys.is_clear_all() || !(keyuse= join->best_positions[tablenr].key) || (join->best_positions[tablenr].sj_strategy == SJ_OPT_LOOSE_SCAN)) { @@ -6252,10 +6477,24 @@ get_best_combination(JOIN *join) } else if (create_ref_for_key(join, j, keyuse, used_tables)) DBUG_RETURN(TRUE); // Something went wrong + loop_end: + j->records_read= (ha_rows)join->best_positions[tablenr].records_read; + join->map2table[j->table->tablenr]= j; + + // If we've reached the end of sjm nest, switch back to main sequence + if (j + 1 == sjm_nest_end) + { + j->last_leaf_in_bush= TRUE; + j= sjm_saved_tab; + sjm_nest_end= NULL; + } } - for (i=0 ; i < table_count ; i++) - join->map2table[join->join_tab[i].table->tablenr]=join->join_tab+i; + join->top_jtrange_tables= join->join_tab_ranges.head()->end - + join->join_tab_ranges.head()->start; + + //for (i=0 ; i < table_count ; i++) + // join->map2table[join->join_tab[i].table->tablenr]=join->join_tab+i; update_depend_map(join); DBUG_RETURN(0); } @@ -6505,6 +6744,8 @@ JOIN::make_simple_join(JOIN *parent, TABLE *temp_table) join_tab= parent->join_tab_reexec; table= &parent->table_reexec[0]; parent->table_reexec[0]= temp_table; + top_jtrange_tables= 1; + tables= 1; const_tables= 0; const_table_map= 0; @@ -6550,6 +6791,9 @@ JOIN::make_simple_join(JOIN *parent, TABLE *temp_table) join_tab->loosescan_match_tab= NULL; join_tab->emb_sj_nest= NULL; join_tab->pre_idx_push_select_cond= NULL; + join_tab->bush_root_tab= NULL; + join_tab->bush_children= NULL; + join_tab->last_leaf_in_bush= FALSE; bzero((char*) &join_tab->read_record,sizeof(join_tab->read_record)); temp_table->status=0; temp_table->null_row=0; @@ -6576,6 +6820,7 @@ inline void add_cond_and_fix(Item **e1, Item *e2) } + /** Add to join_tab->select_cond[i] "table.field IS NOT NULL" conditions we've inferred from ref/eq_ref access performed. @@ -6630,9 +6875,11 @@ inline void add_cond_and_fix(Item **e1, Item *e2) static void add_not_null_conds(JOIN *join) { DBUG_ENTER("add_not_null_conds"); - for (uint i=join->const_tables ; i < join->tables ; i++) + + for (JOIN_TAB *tab= first_linear_tab(join, TRUE); + tab; + tab= next_linear_tab(join, tab, TRUE)) { - JOIN_TAB *tab=join->join_tab+i; if (tab->type == JT_REF || tab->type == JT_EQ_REF || tab->type == JT_REF_OR_NULL) { @@ -6760,58 +7007,72 @@ static void make_outerjoin_info(JOIN *join) { DBUG_ENTER("make_outerjoin_info"); - for (uint i=join->const_tables ; i < join->tables ; i++) - { - JOIN_TAB *tab=join->join_tab+i; - TABLE *table=tab->table; - TABLE_LIST *tbl= table->pos_in_table_list; - TABLE_LIST *embedding= tbl->embedding; + bool top= TRUE; + List_iterator<JOIN_TAB_RANGE> it(join->join_tab_ranges); + JOIN_TAB_RANGE *jt_range; - if (tbl->outer_join) + while ((jt_range= it++)) + { + for (JOIN_TAB *tab=jt_range->start + (top ? join->const_tables : 0); + tab != jt_range->end; tab++) { + TABLE *table=tab->table; /* - Table tab is the only one inner table for outer join. - (Like table t4 for the table reference t3 LEFT JOIN t4 ON t3.a=t4.a - is in the query above.) + psergey: The following is probably incorrect, fix it when we get + semi+outer joins processing to work: */ - tab->last_inner= tab->first_inner= tab; - tab->on_expr_ref= &tbl->on_expr; - tab->cond_equal= tbl->cond_equal; - if (embedding) - tab->first_upper= embedding->nested_join->first_nested; - } - for ( ; embedding ; embedding= embedding->embedding) - { - /* Ignore sj-nests: */ - if (!embedding->on_expr) + if (!table) continue; - NESTED_JOIN *nested_join= embedding->nested_join; - if (!nested_join->counter) + TABLE_LIST *tbl= table->pos_in_table_list; + TABLE_LIST *embedding= tbl->embedding; + + if (tbl->outer_join) { /* - Table tab is the first inner table for nested_join. - Save reference to it in the nested join structure. - */ - nested_join->first_nested= tab; - tab->on_expr_ref= &embedding->on_expr; + Table tab is the only one inner table for outer join. + (Like table t4 for the table reference t3 LEFT JOIN t4 ON t3.a=t4.a + is in the query above.) + */ + tab->last_inner= tab->first_inner= tab; + tab->on_expr_ref= &tbl->on_expr; tab->cond_equal= tbl->cond_equal; - if (embedding->embedding) - tab->first_upper= embedding->embedding->nested_join->first_nested; - } - if (!tab->first_inner) - tab->first_inner= nested_join->first_nested; - if (tab->table->reginfo.not_exists_optimize) - tab->first_inner->table->reginfo.not_exists_optimize= 1; - if (++nested_join->counter < nested_join->n_tables) - break; - /* Table tab is the last inner table for nested join. */ - nested_join->first_nested->last_inner= tab; - if (tab->first_inner->table->reginfo.not_exists_optimize) + if (embedding) + tab->first_upper= embedding->nested_join->first_nested; + } + for ( ; embedding ; embedding= embedding->embedding) { - for (JOIN_TAB *join_tab= tab->first_inner; join_tab <= tab; join_tab++) - join_tab->table->reginfo.not_exists_optimize= 1; - } + /* Ignore sj-nests: */ + if (!embedding->on_expr) + continue; + NESTED_JOIN *nested_join= embedding->nested_join; + if (!nested_join->counter) + { + /* + Table tab is the first inner table for nested_join. + Save reference to it in the nested join structure. + */ + nested_join->first_nested= tab; + tab->on_expr_ref= &embedding->on_expr; + tab->cond_equal= tbl->cond_equal; + if (embedding->embedding) + tab->first_upper= embedding->embedding->nested_join->first_nested; + } + if (!tab->first_inner) + tab->first_inner= nested_join->first_nested; + if (tab->table->reginfo.not_exists_optimize) + tab->first_inner->table->reginfo.not_exists_optimize= 1; + if (++nested_join->counter < nested_join->n_tables) + break; + /* Table tab is the last inner table for nested join. */ + nested_join->first_nested->last_inner= tab; + if (tab->first_inner->table->reginfo.not_exists_optimize) + { + for (JOIN_TAB *join_tab= tab->first_inner; join_tab <= tab; join_tab++) + join_tab->table->reginfo.not_exists_optimize= 1; + } + } } + top= FALSE; } DBUG_VOID_RETURN; } @@ -6858,8 +7119,9 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) 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++) + for (JOIN_TAB *tab= first_linear_tab(join, TRUE); + tab; + tab= next_linear_tab(join, tab, FALSE)) { if (*tab->on_expr_ref) { @@ -6898,15 +7160,21 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) OUTER_REF_TABLE_BIT | RAND_TABLE_BIT); JOIN_TAB *tab; table_map current_map; - for (uint i=join->const_tables ; i < join->tables ; i++) + uint i= join->const_tables; + for (tab= next_depth_first_tab(join, NULL); tab; + tab= next_depth_first_tab(join, tab), i++) { - tab= join->join_tab+i; /* first_inner is the X in queries like: SELECT * FROM t1 LEFT OUTER JOIN (t2 JOIN t3) ON X */ - JOIN_TAB *first_inner_tab= tab->first_inner; - current_map= tab->table->map; + JOIN_TAB *first_inner_tab= tab->first_inner; + + if (tab->table) + current_map= tab->table->map; + else + current_map= tab->bush_children->start->emb_sj_nest->sj_inner_tables; + bool use_quick_range=0; COND *tmp; @@ -6954,11 +7222,24 @@ 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, FALSE); - /* Add conditions added by add_not_null_conds(). */ - if (tab->select_cond) - add_cond_and_fix(&tmp, tab->select_cond); + { + if (tab->bush_children) + { + // Reached the materialization tab + tmp= make_cond_after_sjm(cond, cond, save_used_tables, used_tables); + used_tables= save_used_tables | used_tables; + save_used_tables= 0; + } + else + tmp= make_cond_for_table(cond, used_tables, current_map, FALSE, 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) @@ -6986,9 +7267,9 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) if (tmp || !cond || tab->type == JT_REF || tab->type == JT_REF_OR_NULL || tab->type == JT_EQ_REF || first_inner_tab) { - DBUG_EXECUTE("where", - print_where(tmp,tab->table->alias.c_ptr(), - QT_ORDINARY);); + DBUG_EXECUTE("where",print_where(tmp, + tab->table? tab->table->alias.c_ptr() :"sjm-nest", + QT_ORDINARY);); SQL_SELECT *sel= tab->select= ((SQL_SELECT*) thd->memdup((uchar*) select, sizeof(*select))); @@ -7012,16 +7293,19 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) tab->set_select_cond(tmp, __LINE__); /* Push condition to storage engine if this is enabled and the condition is not guarded */ - tab->table->file->pushed_cond= NULL; - if (thd->variables.engine_condition_pushdown && !first_inner_tab) + if (tab->table) { - COND *push_cond= - make_cond_for_table(tmp, current_map, current_map, FALSE, FALSE); - if (push_cond) + tab->table->file->pushed_cond= NULL; + if (thd->variables.engine_condition_pushdown && !first_inner_tab) { - /* Push condition to handler */ - if (!tab->table->file->cond_push(push_cond)) - tab->table->file->pushed_cond= push_cond; + COND *push_cond= + make_cond_for_table(tmp, current_map, current_map, FALSE, FALSE); + if (push_cond) + { + /* Push condition to handler */ + if (!tab->table->file->cond_push(push_cond)) + tab->table->file->pushed_cond= push_cond; + } } } } @@ -7053,7 +7337,7 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) } tab->quick=0; } - uint ref_key=(uint) sel->head->reginfo.join_tab->ref.key+1; + uint ref_key= sel->head? (uint) sel->head->reginfo.join_tab->ref.key+1 : 0; if (i == join->const_tables && ref_key) { if (!tab->const_keys.is_clear_all() && @@ -7072,12 +7356,12 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) the index if we are using limit and this is the first table */ - if ((cond && - (!tab->keys.is_subset(tab->const_keys) && i > 0)) || - (!tab->const_keys.is_clear_all() && i == join->const_tables && - join->unit->select_limit_cnt < - join->best_positions[i].records_read && - !(join->select_options & OPTION_FOUND_ROWS))) + if (!tab->table->is_filled_at_execution() && + ((cond && (!tab->keys.is_subset(tab->const_keys) && i > 0)) || + (!tab->const_keys.is_clear_all() && i == join->const_tables && + join->unit->select_limit_cnt < + join->best_positions[i].records_read && + !(join->select_options & OPTION_FOUND_ROWS)))) { /* Join with outer join condition */ COND *orig_cond=sel->cond; @@ -7150,7 +7434,7 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) } /* - Push down conditions from all on expressions. + Push down conditions from all ON expressions. Each of these conditions are guarded by a variable that turns if off just before null complemented row for outer joins is formed. Thus, the condition from an @@ -7159,8 +7443,9 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) */ /* First push down constant conditions from on expressions */ - for (JOIN_TAB *join_tab= join->join_tab+join->const_tables; - join_tab < join->join_tab+join->tables ; join_tab++) + for (JOIN_TAB *join_tab= first_linear_tab(join, TRUE); + join_tab; + join_tab= next_linear_tab(join, join_tab, FALSE)) { if (*join_tab->on_expr_ref) { @@ -7185,10 +7470,10 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) } } - /* Push down non-constant conditions from on expressions */ + /* Push down non-constant conditions from ON expressions */ JOIN_TAB *last_tab= tab; while (first_inner_tab && first_inner_tab->last_inner == last_tab) - { + { /* Table tab is the last inner table of an outer join. An on expression is always attached to it. @@ -7197,8 +7482,18 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) table_map used_tables2= (join->const_table_map | OUTER_REF_TABLE_BIT | RAND_TABLE_BIT); - for (tab= join->join_tab+join->const_tables; tab <= last_tab ; tab++) + for (JOIN_TAB *tab= first_linear_tab(join, TRUE); + tab; + tab= next_linear_tab(join, tab, TRUE)) { + if (!tab->table) + { + /* + psergey-todo: this is probably incorrect, fix this when we get + correct processing for outer joins + semi joins + */ + continue; + } current_map= tab->table->map; used_tables2|= current_map; COND *tmp_cond= make_cond_for_table(on_expr, used_tables2, @@ -7244,37 +7539,12 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) (*sel_cond_ref)->update_used_tables(); if (cond_tab->select) cond_tab->select->cond= cond_tab->select_cond; - } + } + if (tab == last_tab) + break; } first_inner_tab= first_inner_tab->first_upper; } - - if (save_used_tables && !(used_tables & - ~(tab->emb_sj_nest->sj_inner_tables | - join->const_table_map | PSEUDO_TABLE_BITS))) - { - /* - We have reached the end of semi join nest. That is, the join order - looks like this: - - outer_tbl1 SJ-Materialize(inner_tbl1 ... inner_tblN) outer_tbl ... - ^ - \-we're here - At this point, we need to produce two conditions - - A condition that can be checked when we have all of the sj-inner - tables (inner_tbl1 ... inner_tblN). This will be used while doing - materialization. - - A condition that can be checked when we have all of the tables - in the prefix (both inner and outer). - */ - tab->emb_sj_nest->sj_mat_info->join_cond= - cond ? - make_cond_after_sjm(cond, cond, save_used_tables, used_tables): - NULL; - used_tables= save_used_tables | used_tables; - save_used_tables= 0; - } - } } DBUG_RETURN(0); @@ -7476,7 +7746,7 @@ void revise_cache_usage(JOIN_TAB *join_tab) SYNOPSIS end_sj_materialize() join The join - join_tab Last join table + join_tab Points to right after the last join_tab in materialization bush end_of_records FALSE <=> This call is made to pass another record combination TRUE <=> EOF (no action) @@ -7494,7 +7764,7 @@ void revise_cache_usage(JOIN_TAB *join_tab) NESTED_LOOP_ERROR */ -static enum_nested_loop_state +enum_nested_loop_state end_sj_materialize(JOIN *join, JOIN_TAB *join_tab, bool end_of_records) { int error; @@ -7686,7 +7956,18 @@ uint check_join_cache_usage(JOIN_TAB *tab, *icp_other_tables_ok= TRUE; *idx_cond_fact_out= TRUE; - if (cache_level == 0 || i == join->const_tables || !prev_tab) + //psergey-merge: fixes with prev)tab? +/* +- if (cache_level == 0 || i == join->const_tables) ++ if (cache_level == 0 || i == join->const_tables || !prev_tab) + +*/ + /* + Don't use join cache if @@join_cache_level==0 or this table is the first + one join suborder (either at top level or inside a bush) + */ + if (cache_level == 0 || tab == join->join_tab + join->const_tables || + (tab->bush_root_tab && tab->bush_root_tab->bush_children->start == tab)) return 0; if (force_unlinked_cache && (cache_level%2 == 0)) @@ -7694,10 +7975,7 @@ uint check_join_cache_usage(JOIN_TAB *tab, if (options & SELECT_NO_JOIN_CACHE) goto no_join_cache; - /* - psergey-todo: why the below when execution code seems to handle the - "range checked for each record" case? - */ + if (tab->use_quick == 2) goto no_join_cache; @@ -7723,8 +8001,8 @@ uint check_join_cache_usage(JOIN_TAB *tab, Don't use join buffering if we're dictated not to by no_jbuf_after (this ...) */ - if (!(i <= no_jbuf_after) || tab->loosescan_match_tab || - sj_is_materialize_strategy(join->best_positions[i].sj_strategy)) + if ((!tab->bush_root_tab? !(i <= no_jbuf_after) : FALSE) || + tab->loosescan_match_tab || tab->bush_children) goto no_join_cache; for (JOIN_TAB *first_inner= tab->first_inner; first_inner; @@ -7874,8 +8152,8 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) uint jcl= 0; bool statistics= test(!(join->select_options & SELECT_DESCRIBE)); bool sorted= 1; - uint first_sjm_table= MAX_TABLES; - uint last_sjm_table= MAX_TABLES; + //uint first_sjm_table= MAX_TABLES; + //uint last_sjm_table= MAX_TABLES; DBUG_ENTER("make_join_readinfo"); @@ -7883,21 +8161,38 @@ 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++) + for (i= 0; i < join->const_tables; i++) //psergey-merge-todo: partial_join_cardinality for everything. join->join_tab[i].partial_join_cardinality= 1; - for (i=join->const_tables ; i < join->tables ; i++) + //for (i=join->const_tables ; i < join->tables ; i++) + i= 0; + for (JOIN_TAB *tab= first_linear_tab(join, TRUE); + tab; + tab= next_linear_tab(join, tab, TRUE), i++) { - JOIN_TAB *tab=join->join_tab+i; TABLE *table=tab->table; bool icp_other_tables_ok= FALSE; bool idx_cond_fact_out= FALSE; + tab->sorted= sorted; + sorted= 0; // only first must be sorted + + if (tab->bush_children) + { + if (setup_sj_materialization(tab)) + return TRUE; + table= tab->table; + } + 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 + + if (!(tab->bush_root_tab && + tab->bush_root_tab->bush_children->end == tab + 1)) + { + tab->next_select=sub_select; /* normal select */ + } + /* The approximation below for partial join cardinality is not good because @@ -7915,27 +8210,6 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) return TRUE; /* purecov: inspected */ tab->sorted= TRUE; } - - /* - SJ-Materialization - */ - if (!(i >= first_sjm_table && i < last_sjm_table)) - tab->first_sjm_sibling= NULL; - if (sj_is_materialize_strategy(join->best_positions[i].sj_strategy)) - { - /* This is a start of semi-join nest */ - first_sjm_table= i; - last_sjm_table= i + join->best_positions[i].n_sj_tables; - if (i == join->const_tables) - join->first_select= sub_select_sjm; - else - tab[-1].next_select= sub_select_sjm; - - if (setup_sj_materialization(tab)) - return TRUE; - for (uint j= first_sjm_table; j != last_sjm_table; j++) - join->join_tab[j].first_sjm_sibling= join->join_tab + first_sjm_table; - } table->status=STATUS_NO_RECORD; pick_table_access_method (tab); @@ -7947,6 +8221,11 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) for ( ; ; ) { enum join_type tab_type= tab->type; + + JOIN_TAB *prev_tab= tab - 1; + if ((tab->bush_root_tab && tab->bush_root_tab->bush_children->start == tab)) + prev_tab= NULL; + switch (tab->type) { case JT_SYSTEM: case JT_CONST: @@ -7956,9 +8235,10 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) case JT_ALL: if ((jcl= check_join_cache_usage(tab, join, options, no_jbuf_after, - i == last_sjm_table ? - join->join_tab+first_sjm_table : - tab-1, + //i == last_sjm_table ? + // join->join_tab+first_sjm_table : + // tab-1, + prev_tab, &icp_other_tables_ok, &idx_cond_fact_out))) { @@ -8035,7 +8315,8 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) } else { - tab->read_first_record= join_init_read_record; + if (!tab->bush_children) + tab->read_first_record= join_init_read_record; if (i == join->const_tables) { if (tab->select && tab->select->quick) @@ -8111,13 +8392,16 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after) abort(); /* purecov: deadcode */ } } - join->join_tab[join->tables-1].next_select=0; /* Set by do_select */ + uint n_top_tables= join->join_tab_ranges.head()->end - + join->join_tab_ranges.head()->start; + join->join_tab[n_top_tables - 1].next_select=0; /* Set by do_select */ -/* + /* If a join buffer is used to join a table the ordering by an index for the first non-constant table cannot be employed anymore. */ - for (i=join->const_tables ; i < join->tables ; i++) + //for (i=join->const_tables ; i < join->tables ; i++) + for (i=join->const_tables ; i < n_top_tables ; i++) { JOIN_TAB *tab=join->join_tab+i; if (tab->use_join_cache) @@ -8179,6 +8463,9 @@ bool error_if_full_join(JOIN *join) /** cleanup JOIN_TAB. + + DESCRIPTION + This is invoked when we've finished all join executions. */ void JOIN_TAB::cleanup() @@ -8197,6 +8484,12 @@ void JOIN_TAB::cleanup() { table->disable_keyread(); table->file->ha_index_or_rnd_end(); + + if (table->pos_in_table_list && + table->pos_in_table_list->jtbm_subselect) + { + table->pos_in_table_list->jtbm_subselect->cleanup(); + } /* We need to reset this for next select (Tested in part_of_refkey) @@ -8391,7 +8684,7 @@ void JOIN::cleanup(bool full) if (table) { - JOIN_TAB *tab,*end; + JOIN_TAB *tab; /* Only a sorted table may be cached. This sorted table is always the first non const table in join->table @@ -8404,13 +8697,15 @@ void JOIN::cleanup(bool full) if (full) { - for (tab= join_tab, end= tab+tables; tab != end; tab++) + for (tab= top_jtrange_tables?join_tab:NULL; tab; tab= next_linear_tab(this, tab, TRUE)) tab->cleanup(); + //psergey4: how is the above supposed to work when + //top_jtrange_tables==FALSE? It will crash right away! table= 0; } else { - for (tab= join_tab, end= tab+tables; tab != end; tab++) + for (tab= top_jtrange_tables?join_tab:NULL; tab; tab= next_linear_tab(this, tab, TRUE)) { if (tab->table) tab->table->file->ha_index_or_rnd_end(); @@ -8548,24 +8843,29 @@ only_eq_ref_tables(JOIN *join,ORDER *order,table_map tables) static void update_depend_map(JOIN *join) { - JOIN_TAB *join_tab=join->join_tab, *end=join_tab+join->tables; - - for (; join_tab != end ; join_tab++) - { - TABLE_REF *ref= &join_tab->ref; - table_map depend_map=0; - Item **item=ref->items; - uint i; - for (i=0 ; i < ref->key_parts ; i++,item++) - depend_map|=(*item)->used_tables(); - ref->depend_map=depend_map & ~OUTER_REF_TABLE_BIT; - depend_map&= ~OUTER_REF_TABLE_BIT; - for (JOIN_TAB **tab=join->map2table; - depend_map ; - tab++,depend_map>>=1 ) - { - if (depend_map & 1) - ref->depend_map|=(*tab)->ref.depend_map; + List_iterator<JOIN_TAB_RANGE> it(join->join_tab_ranges); + JOIN_TAB_RANGE *jt_range; + + while ((jt_range= it++)) + { + for (JOIN_TAB *join_tab=jt_range->start; join_tab != jt_range->end; + join_tab++) + { + TABLE_REF *ref= &join_tab->ref; + table_map depend_map=0; + Item **item=ref->items; + uint i; + for (i=0 ; i < ref->key_parts ; i++,item++) + depend_map|=(*item)->used_tables(); + ref->depend_map=depend_map & ~OUTER_REF_TABLE_BIT; + depend_map&= ~OUTER_REF_TABLE_BIT; + for (JOIN_TAB **tab=join->map2table; + depend_map ; + tab++,depend_map>>=1 ) + { + if (depend_map & 1) + ref->depend_map|=(*tab)->ref.depend_map; + } } } } @@ -8573,7 +8873,7 @@ static void update_depend_map(JOIN *join) /** Update the dependency map for the sort order. */ -static void update_depend_map(JOIN *join, ORDER *order) +static void update_depend_map_for_order(JOIN *join, ORDER *order) { for (; order ; order=order->next) { @@ -8624,17 +8924,25 @@ remove_const(JOIN *join,ORDER *first_order, COND *cond, return change_list ? 0 : first_order; // No need to sort ORDER *order,**prev_ptr; - table_map first_table= join->join_tab[join->const_tables].table->map; + table_map first_table; table_map not_const_tables= ~join->const_table_map; table_map ref; + bool first_is_base_table= FALSE; DBUG_ENTER("remove_const"); + if (join->join_tab[join->const_tables].table) + { + first_table= join->join_tab[join->const_tables].table->map; + first_is_base_table= TRUE; + } + + prev_ptr= &first_order; *simple_order= *join->join_tab[join->const_tables].on_expr_ref ? 0 : 1; /* NOTE: A variable of not_const_tables ^ first_table; breaks gcc 2.7 */ - update_depend_map(join, first_order); + update_depend_map_for_order(join, first_order); for (order=first_order; order ; order=order->next) { table_map order_tables=order->item[0]->used_tables(); @@ -8672,7 +8980,7 @@ remove_const(JOIN *join,ORDER *first_order, COND *cond, DBUG_PRINT("info",("removing: %s", order->item[0]->full_name())); continue; } - if ((ref=order_tables & (not_const_tables ^ first_table))) + if (first_is_base_table && (ref=order_tables & (not_const_tables ^ first_table))) { if (!(order_tables & first_table) && only_eq_ref_tables(join,first_order, ref)) @@ -8748,8 +9056,11 @@ static void clear_tables(JOIN *join) must clear only the non-const tables, as const tables are not re-calculated. */ - for (uint i=join->const_tables ; i < join->tables ; i++) - mark_as_null_row(join->table[i]); // All fields are NULL + for (uint i= 0 ; i < join->tables ; i++) + { + if (!(join->table[i]->map & join->const_table_map)) + mark_as_null_row(join->table[i]); // All fields are NULL + } } /***************************************************************************** @@ -9574,7 +9885,25 @@ static int compare_fields_by_table_order(Item_field *field1, if (outer_ref) return cmp; JOIN_TAB **idx= (JOIN_TAB **) table_join_idx; - cmp= idx[field2->field->table->tablenr]-idx[field1->field->table->tablenr]; + + JOIN_TAB *tab1= idx[field1->field->table->tablenr]; + JOIN_TAB *tab2= idx[field2->field->table->tablenr]; + + /* + if one of the table is inside a merged SJM nest and another one isn't, + compare SJM bush roots of the tables. + */ + if (tab1->bush_root_tab != tab2->bush_root_tab) + { + if (tab1->bush_root_tab) + tab1= tab1->bush_root_tab; + + if (tab2->bush_root_tab) + tab2= tab2->bush_root_tab; + } + + cmp= tab2 - tab1; + if (!cmp) { JOIN_TAB *tab= idx[field1->field->table->tablenr]; @@ -9698,7 +10027,8 @@ Item *eliminate_item_equal(COND *cond, COND_EQUAL *upper_levels, /* Pick the "head" item: the constant one or the first in the join order - that's not inside some SJM nest. + that's not inside some SJM nest. psergey2: out-of-date comment. It is ok + inside SJM, too. */ if (item_const) head= item_const; @@ -10796,6 +11126,9 @@ void optimize_wo_join_buffering(JOIN *join, uint first_tab, uint last_tab, for (i= first_tab; i <= last_tab; i++) reopt_remaining_tables |= join->positions[i].table->table->map; + table_map save_cur_sj_inner_tables= join->cur_sj_inner_tables; + join->cur_sj_inner_tables= 0; + for (i= first_tab; i <= last_tab; i++) { JOIN_TAB *rs= join->positions[i].table; @@ -10821,6 +11154,7 @@ void optimize_wo_join_buffering(JOIN *join, uint first_tab, uint last_tab, if (!rs->emb_sj_nest) *outer_rec_count *= pos.records_read; } + join->cur_sj_inner_tables= save_cur_sj_inner_tables; *reopt_cost= cost; } @@ -11827,7 +12161,7 @@ create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields, for distinct, as we want the distinct index to be usable in this case too. */ - item->marker == 4 || param->bit_fields_as_long, // psergey-feb17 + item->marker == 4 || param->bit_fields_as_long, force_copy_fields, param->convert_blob_length); @@ -12101,6 +12435,8 @@ create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields, share->keys=1; share->uniques= test(using_unique_constraint); table->key_info= table->s->key_info= keyinfo; + table->keys_in_use_for_query.set_bit(0); + share->keys_in_use.set_bit(0); keyinfo->key_part=key_part_info; keyinfo->flags=HA_NOSAME; keyinfo->usable_key_parts=keyinfo->key_parts= param->group_parts; @@ -12116,6 +12452,8 @@ create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields, bool maybe_null=(*cur_group->item)->maybe_null; key_part_info->null_bit=0; key_part_info->field= field; + if (cur_group == group) + field->key_start.set_bit(0); key_part_info->offset= field->offset(table->record[0]); key_part_info->length= (uint16) field->key_length(); key_part_info->type= (uint8) field->key_type(); @@ -12185,6 +12523,8 @@ create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields, keyinfo->key_parts * sizeof(KEY_PART_INFO)))) goto err; bzero((void*) key_part_info, keyinfo->key_parts * sizeof(KEY_PART_INFO)); + table->keys_in_use_for_query.set_bit(0); + share->keys_in_use.set_bit(0); table->key_info= table->s->key_info= keyinfo; keyinfo->key_part=key_part_info; keyinfo->flags=HA_NOSAME | HA_NULL_ARE_EQUAL; @@ -12223,6 +12563,13 @@ create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields, { key_part_info->null_bit=0; key_part_info->field= *reg_field; + (*reg_field)->flags |= PART_KEY_FLAG; + if (key_part_info == keyinfo->key_part) + (*reg_field)->key_start.set_bit(0); + key_part_info->null_bit= (*reg_field)->null_bit; + key_part_info->null_offset= (uint) ((*reg_field)->null_ptr - + (uchar*) table->record[0]); + key_part_info->offset= (*reg_field)->offset(table->record[0]); key_part_info->length= (uint16) (*reg_field)->pack_length(); /* TODO: @@ -13031,8 +13378,7 @@ do_select(JOIN *join,List<Item> *fields,TABLE *table,Procedure *procedure) Next_select_func end_select= setup_end_select_func(join); if (join->tables) { - join->join_tab[join->tables-1].next_select= end_select; - + join->join_tab[join->top_jtrange_tables - 1].next_select= end_select; join_tab=join->join_tab+join->const_tables; } join->send_records=0; @@ -13070,9 +13416,9 @@ do_select(JOIN *join,List<Item> *fields,TABLE *table,Procedure *procedure) else { DBUG_ASSERT(join->tables); - error= join->first_select(join,join_tab,0); + error= sub_select(join,join_tab,0); if (error == NESTED_LOOP_OK || error == NESTED_LOOP_NO_MORE_ROWS) - error= join->first_select(join,join_tab,1); + error= sub_select(join,join_tab,1); if (error == NESTED_LOOP_QUERY_LIMIT) error= NESTED_LOOP_OK; /* select_limit used */ } @@ -13138,105 +13484,8 @@ int rr_sequential_and_unpack(READ_RECORD *info) } -/* - Semi-join materialization join function - - SYNOPSIS - sub_select_sjm() - join The join - join_tab The first table in the materialization nest - end_of_records FALSE <=> This call is made to pass another record - combination - TRUE <=> EOF - - DESCRIPTION - This is a join execution function that does materialization of a join - suborder before joining it to the rest of the join. - - The table pointed by join_tab is the first of the materialized tables. - This function first creates the materialized table and then switches to - joining the materialized table with the rest of the join. - - The materialized table can be accessed in two ways: - - index lookups - - full table scan - - RETURN - One of enum_nested_loop_state values -*/ - -enum_nested_loop_state -sub_select_sjm(JOIN *join, JOIN_TAB *join_tab, bool end_of_records) -{ - int res; - enum_nested_loop_state rc; - - DBUG_ENTER("sub_select_sjm"); - - if (!join_tab->emb_sj_nest) - { - /* - We're handling GROUP BY/ORDER BY, this is the first table, and we've - actually executed the join already and now we're just reading the - result of the join from the temporary table. - Bypass to regular join handling. - Yes, it would be nicer if sub_select_sjm wasn't called at all in this - case but there's no easy way to arrange this. - */ - rc= sub_select(join, join_tab, end_of_records); - DBUG_RETURN(rc); - } - - SJ_MATERIALIZATION_INFO *sjm= join_tab->emb_sj_nest->sj_mat_info; - if (end_of_records) - { - rc= (*join_tab[sjm->tables - 1].next_select)(join, - join_tab + sjm->tables, - end_of_records); - DBUG_RETURN(rc); - } - if (!sjm->materialized) - { - /* - Do the materialization. First, put end_sj_materialize after the last - inner table so we can catch record combinations of sj-inner tables. - */ - Next_select_func next_func= join_tab[sjm->tables - 1].next_select; - join_tab[sjm->tables - 1].next_select= end_sj_materialize; - - /* - Now run the join for the inner tables. The first call is to run the - join, the second one is to signal EOF (this is essential for some - join strategies, e.g. it will make join buffering flush the records) - */ - if ((rc= sub_select(join, join_tab, FALSE)) < 0 || - (rc= sub_select(join, join_tab, TRUE/*EOF*/)) < 0) - { - join_tab[sjm->tables - 1].next_select= next_func; - DBUG_RETURN(rc); /* it's NESTED_LOOP_(ERROR|KILLED)*/ - } - join_tab[sjm->tables - 1].next_select= next_func; - - /* - Ok, materialization finished. Initialize the access to the temptable - */ - sjm->materialized= TRUE; - join_tab->read_record.read_record= join_no_more_records; - if (sjm->is_sj_scan) - { - /* Initialize full scan */ - JOIN_TAB *last_tab= join_tab + (sjm->tables - 1); - init_read_record(&last_tab->read_record, join->thd, - sjm->table, NULL, TRUE, TRUE, FALSE); - - DBUG_ASSERT(last_tab->read_record.read_record == rr_sequential); - last_tab->read_first_record= join_read_record_no_init; - last_tab->read_record.copy_field= sjm->copy_field; - last_tab->read_record.copy_field_end= sjm->copy_field + - sjm->sjm_table_cols.elements; - last_tab->read_record.read_record= rr_sequential_and_unpack; - } - } +#if 0 +psergey-merge: todo: else { if (sjm->is_sj_scan) @@ -13246,34 +13495,7 @@ sub_select_sjm(JOIN *join, JOIN_TAB *join_tab, bool end_of_records) DBUG_RETURN(NESTED_LOOP_ERROR); } } - - if (sjm->is_sj_scan) - { - /* Do full scan of the materialized table */ - JOIN_TAB *last_tab= join_tab + (sjm->tables - 1); - - Item *save_cond= last_tab->select_cond; - last_tab->set_select_cond(sjm->join_cond, __LINE__); - - rc= sub_select(join, last_tab, end_of_records); - last_tab->set_select_cond(save_cond, __LINE__); - DBUG_RETURN(rc); - } - else - { - /* Do index lookup in the materialized table */ - if ((res= join_read_key2(join_tab->join->thd, join_tab, - sjm->table, sjm->tab_ref)) == 1) - DBUG_RETURN(NESTED_LOOP_ERROR); /* purecov: inspected */ - if (res || !sjm->in_equality->val_int()) - DBUG_RETURN(NESTED_LOOP_NO_MORE_ROWS); - } - rc= (*join_tab[sjm->tables - 1].next_select)(join, - join_tab + sjm->tables, - end_of_records); - DBUG_RETURN(rc); -} - +#endif /* Fill the join buffer with partial records, retrieve all full matches for them @@ -13527,6 +13749,10 @@ sub_select(JOIN *join,JOIN_TAB *join_tab,bool end_of_records) } join->thd->row_count= 0; + if (rc != NESTED_LOOP_NO_MORE_ROWS && + (rc= join_tab_execution_startup(join_tab)) < 0) + DBUG_RETURN(rc); + if (join_tab->loosescan_match_tab) join_tab->loosescan_match_tab->found_match= FALSE; @@ -14173,6 +14399,20 @@ join_read_always_key(JOIN_TAB *tab) } } + // psergey-merge:todo: should the below be removed: ? + // if not, what's the BKA equivalent for it? + // (example: this is needed for outer joins where we can't do early NULL + // filtering because we'll still need to produce NULL-complemented records) + /* Perform "Late NULLs Filtering" (see internals manual for explanations) */ +#if 0 + Not needed? + 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; + } +#endif + if (cp_buffer_from_ref(tab->join->thd, table, &tab->ref)) return -1; if ((error= table->file->ha_index_read_map(table->record[0], @@ -14313,13 +14553,24 @@ int join_init_read_record(JOIN_TAB *tab) return (*tab->read_record.read_record)(&tab->read_record); } -static int +int join_read_record_no_init(JOIN_TAB *tab) { + Copy_field *save_copy, *save_copy_end; + + save_copy= tab->read_record.copy_field; + save_copy_end= tab->read_record.copy_field_end; + + init_read_record(&tab->read_record, tab->join->thd, tab->table, + tab->select,1,1, FALSE); + + tab->read_record.copy_field= save_copy; + tab->read_record.copy_field_end= save_copy_end; + tab->read_record.read_record= rr_sequential_and_unpack; + return (*tab->read_record.read_record)(&tab->read_record); } - static int join_read_first(JOIN_TAB *tab) { @@ -14964,8 +15215,25 @@ end_write_group(JOIN *join, JOIN_TAB *join_tab __attribute__((unused)), *****************************************************************************/ /** - @return - 1 if right_item is used removable reference key on left_item + Check if a given equality is guaranteed to be true by use of ref access + + SYNOPSIS + test_if_ref() + root_cond + left_item + right_item + + DESCRIPTION + Check if the given "left_item = right_item" equality is guaranteed to be + true by use of [eq_]ref access method. + + We need root_cond as we can't remove ON expressions even if employed ref + access guarantees that they are true. This is because TODO + + RETURN + TRUE if right_item is used removable reference key on left_item + FALSE Otherwise + */ bool test_if_ref(Item *root_cond, Item_field *left_item,Item *right_item) @@ -15023,7 +15291,8 @@ bool test_if_ref(Item *root_cond, Item_field *left_item,Item *right_item) SYNOPSIS make_cond_for_table() cond Condition to analyze - tables Tables for which "current field values" are available + tables Tables for which "current field values" are available (this + includes used_table) used_table Table that we're extracting the condition for (may also include PSEUDO_TABLE_BITS exclude_expensive_cond Do not push expensive conditions @@ -15059,7 +15328,8 @@ make_cond_for_table(Item *cond, table_map tables, table_map used_table, exclude_expensive_cond, retain_ref_cond); } - + + static Item * make_cond_for_table_from_pred(Item *root_cond, Item *cond, table_map tables, table_map used_table, @@ -15081,6 +15351,7 @@ make_cond_for_table_from_pred(Item *root_cond, Item *cond, */ !((used_table & 1) && cond->is_expensive())) return (COND*) 0; // Already checked + if (cond->type() == Item::COND_ITEM) { if (((Item_cond*) cond)->functype() == Item_func::COND_AND_FUNC) @@ -15158,6 +15429,7 @@ make_cond_for_table_from_pred(Item *root_cond, Item *cond, */ (!used_table && exclude_expensive_cond && cond->is_expensive())) return (COND*) 0; // Can't check this yet + if (cond->marker == 2 || cond->eq_cmp_result() == Item::COND_OK) return cond; // Not boolean op @@ -15184,14 +15456,29 @@ make_cond_for_table_from_pred(Item *root_cond, Item *cond, } +/* + The difference of this from make_cond_for_table() is that we're in the + following state: + 1. conditions referring to 'tables' have been checked + 2. conditions referring to sjm_tables have been checked, too + 3. We need condition that couldn't be checked in #1 or #2 but + can be checked when we get both (tables | sjm_tables). + +*/ static COND * make_cond_after_sjm(Item *root_cond, Item *cond, table_map tables, table_map sjm_tables) { + /* + We assume that conditions that refer to only join prefix tables or + sjm_tables have already been checked. + */ if ((!(cond->used_tables() & ~tables) || !(cond->used_tables() & ~sjm_tables))) return (COND*) 0; // Already checked + + /* AND/OR recursive descent */ if (cond->type() == Item::COND_ITEM) { if (((Item_cond*) cond)->functype() == Item_func::COND_AND_FUNC) @@ -15759,8 +16046,6 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit, &usable_keys)) < MAX_KEY) { /* Found key that can be used to retrieve data in sorted order */ - //psergey-mrr:if (tab->pre_idx_push_select_cond) - // tab->select_cond= tab->select->cond= tab->pre_idx_push_select_cond; if (tab->ref.key >= 0) { /* @@ -18738,16 +19023,21 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, { table_map used_tables=0; - uchar sjm_nests[MAX_TABLES]; - uint sjm_nests_cur=0; - uint sjm_nests_end= 0; - uint end_table= join->tables; bool printing_materialize_nest= FALSE; uint select_id= join->select_lex->select_number; - for (uint i=0 ; i < end_table ; i++) + List_iterator<JOIN_TAB_RANGE> it(join->join_tab_ranges); + JOIN_TAB_RANGE *jt_range; + while ((jt_range= it++)) + { + if (jt_range != join->join_tab_ranges.head()) + { + select_id= jt_range->start->emb_sj_nest->sj_subq_pred->get_identifier(); + printing_materialize_nest= TRUE; + } + + for (JOIN_TAB *tab= jt_range->start + 0; tab < jt_range->end; tab++) { - JOIN_TAB *tab=join->join_tab+i; TABLE *table=tab->table; TABLE_LIST *table_list= tab->table->pos_in_table_list; char buff[512]; @@ -18780,84 +19070,6 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, join->select_lex->type; item_list.push_back(new Item_string(stype, strlen(stype), cs)); - /* - Special processing for SJ-Materialization nests: print the fake table - and delay printing of the SJM nest contents until later. - */ - uint sj_strategy= join->best_positions[i].sj_strategy; - if (sj_is_materialize_strategy(sj_strategy) && - !printing_materialize_nest) - { - /* table */ - int len= my_snprintf(table_name_buffer, - sizeof(table_name_buffer)-1, - "subselect%d", - tab->emb_sj_nest->sj_subq_pred->get_identifier()); - item_list.push_back(new Item_string(table_name_buffer, len, cs)); - /* partitions */ - if (join->thd->lex->describe & DESCRIBE_PARTITIONS) - item_list.push_back(item_null); - /* type */ - uint type= (sj_strategy == SJ_OPT_MATERIALIZE_SCAN)? JT_ALL : JT_EQ_REF; - item_list.push_back(new Item_string(join_type_str[type], - strlen(join_type_str[type]), - cs)); - /* possible_keys */ - item_list.push_back(new Item_string("unique_key", - strlen("unique_key"), cs)); - if (sj_strategy == SJ_OPT_MATERIALIZE_SCAN) - { - item_list.push_back(item_null); /* key */ - item_list.push_back(item_null); /* key_len */ - item_list.push_back(item_null); /* ref */ - } - else - { - /* key */ - item_list.push_back(new Item_string("unique_key", strlen("unique_key"), cs)); - /* key_len */ - uint klen= tab->emb_sj_nest->sj_mat_info->table->key_info[0].key_length; - uint buflen= longlong10_to_str(klen, keylen_str_buf, 10) - keylen_str_buf; - item_list.push_back(new Item_string(keylen_str_buf, buflen, cs)); - /* ref */ - item_list.push_back(new Item_string("func", strlen("func"), cs)); - } - /* rows */ - ha_rows rows= (ha_rows) ((sj_strategy == SJ_OPT_MATERIALIZE_SCAN)? - tab->emb_sj_nest->sj_mat_info->rows : 1.0); - item_list.push_back(new Item_int((longlong)rows, - MY_INT64_NUM_DECIMAL_DIGITS)); - /* filtered */ - if (join->thd->lex->describe & DESCRIBE_EXTENDED) - item_list.push_back(new Item_float(1.0, 2)); - - /* Extra */ - if (need_tmp_table) - { - need_tmp_table=0; - extra.append(STRING_WITH_LEN("; Using temporary")); - } - if (need_order) - { - need_order=0; - extra.append(STRING_WITH_LEN("; Using filesort")); - } - /* Skip initial "; "*/ - const char *str= extra.ptr(); - uint32 extra_len= extra.length(); - if (extra_len) - { - str += 2; - extra_len -= 2; - } - item_list.push_back(new Item_string(str, extra_len, cs)); - - /* Register the nest for further processing: */ - sjm_nests[sjm_nests_end++]= i; - i += join->best_positions[i].n_sj_tables-1; - goto loop_end; - } - if (tab->type == JT_ALL && tab->select && tab->select->quick) { quick_type= tab->select->quick->get_type(); @@ -18879,6 +19091,16 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, table->derived_select_number); item_list.push_back(new Item_string(table_name_buffer, len, cs)); } + else if (tab->bush_children) + { + JOIN_TAB *ctab= tab->bush_children->start; + /* table */ + int len= my_snprintf(table_name_buffer, + sizeof(table_name_buffer)-1, + "<subquery%d>", + ctab->emb_sj_nest->sj_subq_pred->get_identifier()); + item_list.push_back(new Item_string(table_name_buffer, len, cs)); + } else { TABLE_LIST *real_table= table->pos_in_table_list; @@ -18973,7 +19195,8 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, } else { - if (table_list->schema_table && + if (table_list && /* SJM bushes don't have table_list */ + table_list->schema_table && table_list->schema_table->i_s_requested_object & OPTIMIZE_I_S_TABLE) { const char *tmp_buff; @@ -19004,7 +19227,8 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, } /* Add "rows" field to item_list. */ - if (table_list->schema_table) + if (table_list /* SJM bushes don't have table_list */ && + table_list->schema_table) { /* in_rows */ if (join->thd->lex->describe & DESCRIBE_EXTENDED) @@ -19023,12 +19247,17 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, examined_rows= tab->limit; else { - tab->table->file->info(HA_STATUS_VARIABLE); - examined_rows= tab->table->file->stats.records; + //tab->table->file->info(HA_STATUS_VARIABLE); + if (!tab->table->pos_in_table_list || + tab->table->is_filled_at_execution()) // temporary, is_filled_at_execution + examined_rows= tab->records; + else + examined_rows= tab->table->file->stats.records; + //psergey-merge: examined_rows= (ha_rows)tab->records_read; } } else - examined_rows=(ha_rows)join->best_positions[i].records_read; + examined_rows=(ha_rows)tab->records_read; item_list.push_back(new Item_int((longlong) (ulonglong) examined_rows, MY_INT64_NUM_DECIMAL_DIGITS)); @@ -19049,7 +19278,7 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, */ float f= 0.0; if (examined_rows) - f= (float) (100.0 * join->best_positions[i].records_read / + f= (float) (100.0 * tab->records_read/*join->best_positions[i].records_read*/ / examined_rows); item_list.push_back(new Item_float(f, 2)); } @@ -19135,7 +19364,8 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, extra.append(STRING_WITH_LEN("; Using where")); } } - if (table_list->schema_table && + if (table_list /* SJM bushes don't have table_list */ && + table_list->schema_table && table_list->schema_table->i_s_requested_object & OPTIMIZE_I_S_TABLE) { if (!table_list->table_open_method) @@ -19214,25 +19444,6 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, } } - /* - if (sj_is_materialize_strategy(sj_strategy)) - { - if (join->best_positions[i].n_sj_tables == 1) - extra.append(STRING_WITH_LEN("; Materialize")); - else - { - last_sjm_table= i + join->best_positions[i].n_sj_tables - 1; - extra.append(STRING_WITH_LEN("; Start materialize")); - } - if (sj_strategy == SJ_OPT_MATERIALIZE_SCAN) - extra.append(STRING_WITH_LEN("; Scan")); - } - else if (last_sjm_table == i) - { - extra.append(STRING_WITH_LEN("; End materialize")); - } - */ - for (uint part= 0; part < tab->ref.key_parts; part++) { if (tab->ref.cond_guards[part]) @@ -19258,20 +19469,13 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, } item_list.push_back(new Item_string(str, len, cs)); } - loop_end: - if (i+1 == end_table && sjm_nests_cur != sjm_nests_end) - { - printing_materialize_nest= TRUE; - i= sjm_nests[sjm_nests_cur++] - 1; - end_table= (i+1) + join->best_positions[i+1].n_sj_tables; - select_id= join->join_tab[i+1].emb_sj_nest->sj_subq_pred->get_identifier(); - } // For next iteration used_tables|=table->map; if (result->send_data(item_list)) join->error= 1; } + } } for (SELECT_LEX_UNIT *unit= join->select_lex->first_inner_unit(); unit; @@ -19519,6 +19723,14 @@ void TABLE_LIST::print(THD *thd, table_map eliminated_tables, String *str, print_join(thd, eliminated_tables, str, &nested_join->join_list, query_type); str->append(')'); } + else if (jtbm_subselect) + { + str->append(STRING_WITH_LEN(" <materialize> (")); + subselect_hash_sj_engine *hash_engine; + hash_engine= (subselect_hash_sj_engine*)jtbm_subselect->engine; + hash_engine->materialize_engine->print(str, query_type); + str->append(')'); + } else { const char *cmp_name; // Name to compare with alias diff --git a/sql/sql_select.h b/sql/sql_select.h index 8f0feb0e766..cdf43d31fc5 100644 --- a/sql/sql_select.h +++ b/sql/sql_select.h @@ -147,13 +147,25 @@ enum enum_nested_loop_state typedef enum_nested_loop_state (*Next_select_func)(JOIN *, struct st_join_table *, bool); + +/* + Function prototype for reading first record for a join tab + + RETURN + 0 - OK + -1 - Record not found + Other - Error +*/ typedef int (*Read_record_func)(struct st_join_table *tab); + Next_select_func setup_end_select_func(JOIN *join); int rr_sequential(READ_RECORD *info); +int rr_sequential_and_unpack(READ_RECORD *info); class JOIN_CACHE; class SJ_TMP_TABLE; +class JOIN_TAB_RANGE; typedef struct st_join_table { st_join_table() {} /* Remove gcc warning */ @@ -180,6 +192,21 @@ typedef struct st_join_table { st_join_table *last_inner; /**< last table table for embedding outer join */ st_join_table *first_upper; /**< first inner table for embedding outer join */ st_join_table *first_unmatched; /**< used for optimization purposes only */ + + /* + For join tabs that are inside an SJM bush: root of the bush + */ + st_join_table *bush_root_tab; + + /* TRUE <=> This join_tab is inside an SJM bush and is the last leaf tab here */ + bool last_leaf_in_bush; + + /* + ptr - this is a bush, and ptr points to description of child join_tab + range + NULL - this join tab has no bush children + */ + JOIN_TAB_RANGE *bush_children; /* Special content for EXPLAIN 'Extra' column or NULL if none */ const char *info; @@ -217,7 +244,13 @@ typedef struct st_join_table { method (but not 'index' for some reason), i.e. this matches method which E(#records) is in found_records. */ - ha_rows read_time; + double read_time; + + /* psergey-todo: make the below have type double, like POSITION::records_read? */ + ha_rows records_read; + + /* Startup cost for execution */ + double startup_cost; double partial_join_cardinality; @@ -302,10 +335,11 @@ typedef struct st_join_table { /* Semi-join strategy to be used for this join table. This is a copy of POSITION::sj_strategy field. This field is set up by the - fix_semijion_strategies_for_picked_join_order. + fix_semijoin_strategies_for_picked_join_order. */ uint sj_strategy; - + + //psergey-merge: todo: stop using this: struct st_join_table *first_sjm_sibling; void cleanup(); @@ -394,6 +428,7 @@ typedef struct st_join_table { } void calc_used_field_length(bool max_fl); ulong get_used_fieldlength() + { if (!used_fieldlength) calc_used_field_length(FALSE); @@ -417,9 +452,6 @@ enum_nested_loop_state sub_select_cache(JOIN *join, JOIN_TAB *join_tab, bool end_of_records); enum_nested_loop_state sub_select(JOIN *join,JOIN_TAB *join_tab, bool end_of_records); -enum_nested_loop_state sub_select_sjm(JOIN *join, JOIN_TAB *join_tab, - bool end_of_records); - enum_nested_loop_state end_send_group(JOIN *join, JOIN_TAB *join_tab __attribute__((unused)), bool end_of_records); @@ -566,16 +598,31 @@ inline bool sj_is_materialize_strategy(uint strategy) } +class JOIN_TAB_RANGE: public Sql_alloc +{ +public: + JOIN_TAB *start; + JOIN_TAB *end; +}; + + class JOIN :public Sql_alloc { JOIN(const JOIN &rhs); /**< not implemented */ JOIN& operator=(const JOIN &rhs); /**< not implemented */ public: - JOIN_TAB *join_tab,**best_ref; + JOIN_TAB *join_tab, **best_ref; JOIN_TAB **map2table; ///< mapping between table indexes and JOIN_TABs JOIN_TAB *join_tab_save; ///< saved join_tab for subquery reexecution + + List<JOIN_TAB_RANGE> join_tab_ranges; + + /* + Base tables participating in the join. After join optimization is done, the + tables are stored in the join order (but the only really important part is + that const tables are first). + */ TABLE **table; - TABLE **all_tables; /** The table which has an index that allows to produce the requried ordering. A special value of 0x1 means that the ordering will be produced by @@ -585,6 +632,13 @@ public: uint tables; /**< Number of tables in the join */ uint outer_tables; /**< Number of tables that are not inside semijoin */ uint const_tables; + /* + Number of tables in the top join_tab array. Normally this matches + (join_tab_ranges.head()->end - join_tab_ranges.head()->start). + + We keep it here so that it is saved/restored with JOIN::restore_tmp. + */ + uint top_jtrange_tables; uint send_group_parts; bool group; /**< If query contains GROUP BY clause */ /** @@ -660,7 +714,6 @@ public: /* We also maintain a stack of join optimization states in * join->positions[] */ /******* Join optimization state members end *******/ - Next_select_func first_select; /* The cost of best complete join plan found so far during optimization, after optimization phase - cost of picked join order (not taking into @@ -781,8 +834,12 @@ public: bool union_part; ///< this subselect is part of union bool optimized; ///< flag to avoid double optimization in EXPLAIN + /* + Subqueries that will need to be converted to semi-join nests, including + those converted to jtbm nests. The list is emptied when conversion is done. + */ Array<Item_in_subselect> sj_subselects; - + /* Temporary tables used to weed-out semi-join duplicates */ List<TABLE> sj_tmp_tables; /* SJM nests that are executed with SJ-Materialization strategy */ @@ -816,6 +873,7 @@ public: join_tab= join_tab_save= 0; table= 0; tables= 0; + top_jtrange_tables= 0; const_tables= 0; eliminated_tables= 0; join_list= 0; @@ -870,7 +928,6 @@ public: rollup.state= ROLLUP::STATE_NONE; no_const_tables= FALSE; - first_select= sub_select; } int prepare(Item ***rref_pointer_array, TABLE_LIST *tables, uint wind_num, @@ -1197,6 +1254,7 @@ 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); int join_init_read_record(JOIN_TAB *tab); +int join_read_record_no_init(JOIN_TAB *tab); void set_position(JOIN *join,uint idx,JOIN_TAB *table,KEYUSE *key); inline Item * and_items(Item* cond, Item *item) { diff --git a/sql/sql_show.cc b/sql/sql_show.cc index cdfb982b372..5732385950a 100644 --- a/sql/sql_show.cc +++ b/sql/sql_show.cc @@ -6586,6 +6586,9 @@ int make_schema_select(THD *thd, SELECT_LEX *sel, } +JOIN_TAB *first_linear_tab(JOIN *join, bool after_const_tables); +JOIN_TAB *next_linear_tab(JOIN* join, JOIN_TAB* tab, bool include_bush_roots); + /* Fill temporary schema tables before SELECT @@ -6602,14 +6605,17 @@ int make_schema_select(THD *thd, SELECT_LEX *sel, bool get_schema_tables_result(JOIN *join, enum enum_schema_table_state executed_place) { - JOIN_TAB *tmp_join_tab= join->join_tab+join->tables; + //JOIN_TAB *tmp_join_tab= join->join_tab+join->tables; THD *thd= join->thd; LEX *lex= thd->lex; bool result= 0; DBUG_ENTER("get_schema_tables_result"); thd->no_warnings_for_error= 1; - for (JOIN_TAB *tab= join->join_tab; tab < tmp_join_tab; tab++) + //for (JOIN_TAB *tab= join->join_tab; tab < tmp_join_tab; tab++) + for (JOIN_TAB *tab= first_linear_tab(join, FALSE); + tab; + tab= next_linear_tab(join, tab, FALSE)) { if (!tab->table || !tab->table->pos_in_table_list) break; diff --git a/sql/sql_test.cc b/sql/sql_test.cc index 5bf9cd1f77e..29147e7bf2a 100644 --- a/sql/sql_test.cc +++ b/sql/sql_test.cc @@ -166,58 +166,66 @@ void TEST_filesort(SORT_FIELD *sortorder,uint s_length) void TEST_join(JOIN *join) { - uint i,ref; + uint ref; + int i; + List_iterator<JOIN_TAB_RANGE> it(join->join_tab_ranges); + JOIN_TAB_RANGE *jt_range; DBUG_ENTER("TEST_join"); - /* - Assemble results of all the calls to full_name() first, - in order not to garble the tabular output below. - */ - String ref_key_parts[MAX_TABLES]; - for (i= 0; i < join->tables; i++) - { - JOIN_TAB *tab= join->join_tab + i; - for (ref= 0; ref < tab->ref.key_parts; ref++) - { - ref_key_parts[i].append(tab->ref.items[ref]->full_name()); - ref_key_parts[i].append(" "); - } - } - DBUG_LOCK_FILE; VOID(fputs("\nInfo about JOIN\n",DBUG_FILE)); - for (i=0 ; i < join->tables ; i++) + + while ((jt_range= it++)) { - JOIN_TAB *tab=join->join_tab+i; - TABLE *form=tab->table; - char key_map_buff[128]; - fprintf(DBUG_FILE,"%-16.16s type: %-7s q_keys: %s refs: %d key: %d len: %d\n", - form->alias.c_ptr(), - join_type_str[tab->type], - tab->keys.print(key_map_buff), - tab->ref.key_parts, - tab->ref.key, - tab->ref.key_length); - if (tab->select) + /* + Assemble results of all the calls to full_name() first, + in order not to garble the tabular output below. + */ + String ref_key_parts[MAX_TABLES]; + for (i= 0; i < (jt_range->end - jt_range->start); i++) { - char buf[MAX_KEY/8+1]; - if (tab->use_quick == 2) - fprintf(DBUG_FILE, - " quick select checked for each record (keys: %s)\n", - tab->select->quick_keys.print(buf)); - else if (tab->select->quick) + JOIN_TAB *tab= jt_range->start + i; + for (ref= 0; ref < tab->ref.key_parts; ref++) { - fprintf(DBUG_FILE, " quick select used:\n"); - tab->select->quick->dbug_dump(18, FALSE); + ref_key_parts[i].append(tab->ref.items[ref]->full_name()); + ref_key_parts[i].append(" "); } - else - VOID(fputs(" select used\n",DBUG_FILE)); } - if (tab->ref.key_parts) + + for (i= 0; i < (jt_range->end - jt_range->start); i++) { - fprintf(DBUG_FILE, + JOIN_TAB *tab= jt_range->start + i; + TABLE *form=tab->table; + char key_map_buff[128]; + fprintf(DBUG_FILE,"%-16.16s type: %-7s q_keys: %s refs: %d key: %d len: %d\n", + form->alias.c_ptr(), + join_type_str[tab->type], + tab->keys.print(key_map_buff), + tab->ref.key_parts, + tab->ref.key, + tab->ref.key_length); + if (tab->select) + { + char buf[MAX_KEY/8+1]; + if (tab->use_quick == 2) + fprintf(DBUG_FILE, + " quick select checked for each record (keys: %s)\n", + tab->select->quick_keys.print(buf)); + else if (tab->select->quick) + { + fprintf(DBUG_FILE, " quick select used:\n"); + tab->select->quick->dbug_dump(18, FALSE); + } + else + VOID(fputs(" select used\n",DBUG_FILE)); + } + if (tab->ref.key_parts) + { + fprintf(DBUG_FILE, " refs: %s\n", ref_key_parts[i].c_ptr_safe()); + } } + VOID(fputs("\n",DBUG_FILE)); } DBUG_UNLOCK_FILE; DBUG_VOID_RETURN; diff --git a/sql/sql_union.cc b/sql/sql_union.cc index a94ad9f3b4b..8283d0e01fb 100644 --- a/sql/sql_union.cc +++ b/sql/sql_union.cc @@ -691,6 +691,7 @@ bool st_select_lex_unit::cleanup() { join->tables_list= 0; join->tables= 0; + join->top_jtrange_tables= 0; } error|= fake_select_lex->cleanup(); /* diff --git a/sql/table.cc b/sql/table.cc index 43b766c7ef2..b0aa3d558c9 100644 --- a/sql/table.cc +++ b/sql/table.cc @@ -5325,6 +5325,12 @@ bool st_table::is_children_attached(void) (parent && parent->children_attached)); } + +bool st_table::is_filled_at_execution() +{ + return test(pos_in_table_list->jtbm_subselect); +} + /* Cleanup this table for re-execution. diff --git a/sql/table.h b/sql/table.h index 80519e486ac..504735f9997 100644 --- a/sql/table.h +++ b/sql/table.h @@ -963,7 +963,13 @@ struct st_table { key_read= 1; file->extra(HA_EXTRA_KEYREAD); DBUG_VOID_RETURN; - } + } + /* + If TRUE, the table is filled at execution phase (and so, the optimizer + should not do things like range analysis or constant table detection on + it). + */ + bool is_filled_at_execution(); inline void disable_keyread() { DBUG_ENTER("disable_keyread"); @@ -1192,7 +1198,7 @@ class Item_in_subselect; 1) table (TABLE_LIST::view == NULL) - base table (TABLE_LIST::derived == NULL) - - subquery - TABLE_LIST::table is a temp table + - FROM-clause subquery - TABLE_LIST::table is a temp table (TABLE_LIST::derived != NULL) - information schema table (TABLE_LIST::schema_table != NULL) @@ -1211,6 +1217,8 @@ class Item_in_subselect; (TABLE_LIST::natural_join != NULL) - JOIN ... USING (TABLE_LIST::join_using_fields != NULL) + - semi-join nest (sj_on_expr!= NULL && sj_subq_pred!=NULL) + 4) jtbm semi-join (jtbm_subselect != NULL) */ class Index_hint; @@ -1253,8 +1261,14 @@ struct TABLE_LIST */ table_map sj_inner_tables; /* Number of IN-compared expressions */ - uint sj_in_exprs; + uint sj_in_exprs; + + /* If this is a non-jtbm semi-join nest: corresponding subselect predicate */ Item_in_subselect *sj_subq_pred; + + /* If this is a jtbm semi-join object: corresponding subselect predicate */ + Item_in_subselect *jtbm_subselect; + SJ_MATERIALIZATION_INFO *sj_mat_info; /* |