diff options
80 files changed, 9889 insertions, 1861 deletions
diff --git a/mysql-test/include/check_shared_row_lock.inc b/mysql-test/include/check_shared_row_lock.inc index efc7e13b3aa..1c9d9b0c3c6 100644 --- a/mysql-test/include/check_shared_row_lock.inc +++ b/mysql-test/include/check_shared_row_lock.inc @@ -33,7 +33,8 @@ connection default; # least it acquires S-locks on some of rows. let $wait_condition= select count(*) = 1 from information_schema.processlist - where state in ("Sending data","statistics", "preparing") and + where state in ("Sending data","statistics", "preparing", "updating", + "executing", "Searching rows for update") and info = "$wait_statement"; --source include/wait_condition.inc diff --git a/mysql-test/include/subselect_mat_cost.inc b/mysql-test/include/subselect_mat_cost.inc new file mode 100644 index 00000000000..04b116e9527 --- /dev/null +++ b/mysql-test/include/subselect_mat_cost.inc @@ -0,0 +1,152 @@ +-- echo +-- echo /* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +-- echo +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +-- echo +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; + +-- echo +-- echo /* +-- echo B. "Natural" examples of subqueries without grouping that +-- echo cannot be flattened into semijoin. +-- echo */ + +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +-- echo +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +-- echo UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +-- echo +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +-- echo +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); + +-- echo +-- echo /* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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); +-- echo +explain +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); +-- echo +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +-- echo +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +-- echo +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +-- echo +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); + +-- echo +-- echo /* +-- echo D. Subqueries for which materialization is not possible, and the +-- echo optimizer reverts to in-to-exists. +-- echo */ +# The first two cases are rejected during the prepare phase by the procedure +# subquery_types_allow_materialization(). +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +-- echo +# The following two subqueries return the result of a string function with a +# blob argument, where the return type may be != blob. These are rejected during +# cost-based optimization when attempting to create a temporary table. +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +-- echo + + +-- echo +-- echo /* E. Edge cases. */ +-- echo + +-- echo /* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +--error ER_ILLEGAL_SUBQUERY_OPTIMIZER_SWITCHES +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +set @@optimizer_switch = @save_optimizer_switch; + +-- echo /* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +select '1 - 03' in (select b1 from t2 where b1 > '0'); + +-- echo /* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +-- echo UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); + +-- echo /* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; + +-- echo /* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +-- echo TODO this test produces wrong result due to missing logic to handle the case +-- echo when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +select a1 from t1 where a1 in (select max(b1) from t2); +-- echo +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); + +-- echo /* E.6 make_join_select detects impossible WHERE. * + +-- echo TODO + +-- echo /* E.7 constant optimization detects "no matching row in const table". */ + +-- echo TODO + +-- echo /* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); + +-- echo +-- echo /* F. UPDATE/DELETE with subqueries. */ +-- echo + +-- echo TODO +-- echo diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl index cede3e288a5..542f1ca9660 100755 --- a/mysql-test/mysql-test-run.pl +++ b/mysql-test/mysql-test-run.pl @@ -2088,6 +2088,13 @@ sub environment_setup { push(@ld_library_paths, "$basedir/libmysql/.libs/", "$basedir/libmysql_r/.libs/", "$basedir/zlib/.libs/"); + if ($^O eq "darwin") + { + # it is MAC OS and we have to add dynamic libraries paths + push @ld_library_paths, grep {<$_/*.dylib>} + (<$bindir/storage/*/.libs/>,<$bindir/plugin/*/.libs/>, + <$bindir/plugin/*/*/.libs/>,<$bindir/storage/*/*/.libs>); + } } else { diff --git a/mysql-test/r/explain.result b/mysql-test/r/explain.result index 4bcdf7344a7..2e6dcb23e41 100644 --- a/mysql-test/r/explain.result +++ b/mysql-test/r/explain.result @@ -176,11 +176,15 @@ SELECT @@session.sql_mode INTO @old_sql_mode; SET SESSION sql_mode='ONLY_FULL_GROUP_BY'; EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE f1 > ALL( SELECT t.f1 FROM t1,t1 AS t ); -ERROR 42000: Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +2 SUBQUERY t1 system NULL NULL NULL NULL 0 0.00 const row not found +2 SUBQUERY t system NULL NULL NULL NULL 0 0.00 const row not found +Warnings: +Note 1003 select 1 AS `1` from `test`.`t1` where 0 SHOW WARNINGS; Level Code Message -Error 1140 Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause -Note 1003 select 1 AS `1` from `test`.`t1` where <not>(<exists>(...)) +Note 1003 select 1 AS `1` from `test`.`t1` where 0 SET SESSION sql_mode=@old_sql_mode; DROP TABLE t1; End of 5.0 tests. @@ -262,7 +266,7 @@ WHERE 1 > ALL((SELECT 1 FROM t1 JOIN t1 a ON (MATCH(t1.f1) AGAINST ("")) WHERE t1.f1 GROUP BY t1.f1)); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 -2 SUBQUERY a system NULL NULL NULL NULL 1 Using filesort +2 SUBQUERY a system NULL NULL NULL NULL 1 2 SUBQUERY t1 fulltext f1 f1 0 1 Using where PREPARE stmt FROM 'EXPLAIN SELECT 1 FROM t1 @@ -272,12 +276,12 @@ PREPARE stmt FROM EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 -2 SUBQUERY a system NULL NULL NULL NULL 1 Using filesort +2 SUBQUERY a system NULL NULL NULL NULL 1 2 SUBQUERY t1 fulltext f1 f1 0 1 Using where EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 -2 SUBQUERY a system NULL NULL NULL NULL 1 Using filesort +2 SUBQUERY a system NULL NULL NULL NULL 1 2 SUBQUERY t1 fulltext f1 f1 0 1 Using where DEALLOCATE PREPARE stmt; PREPARE stmt FROM @@ -288,12 +292,12 @@ PREPARE stmt FROM EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 -2 SUBQUERY a system NULL NULL NULL NULL 1 Using filesort +2 SUBQUERY a system NULL NULL NULL NULL 1 2 SUBQUERY t1 fulltext f1 f1 0 1 Using where EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 -2 SUBQUERY a system NULL NULL NULL NULL 1 Using filesort +2 SUBQUERY a system NULL NULL NULL NULL 1 2 SUBQUERY t1 fulltext f1 f1 0 1 Using where DEALLOCATE PREPARE stmt; DROP TABLE t1; diff --git a/mysql-test/r/func_compress.result b/mysql-test/r/func_compress.result index b4e61d0e4fc..5c87939c75b 100644 --- a/mysql-test/r/func_compress.result +++ b/mysql-test/r/func_compress.result @@ -102,6 +102,8 @@ a foo Warnings: Error 1259 ZLIB: Input data corrupted +Error 1259 ZLIB: Input data corrupted +Error 1259 ZLIB: Input data corrupted explain select *, uncompress(a) from t1; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 diff --git a/mysql-test/r/func_group.result b/mysql-test/r/func_group.result index 580f00035c6..a0f30965312 100644 --- a/mysql-test/r/func_group.result +++ b/mysql-test/r/func_group.result @@ -1775,6 +1775,8 @@ CREATE TABLE empty1 (a int); INSERT INTO t1 VALUES (1,'c'),(2,NULL); INSERT INTO t2 VALUES (3,'m'),(4,NULL); INSERT INTO t3 VALUES (1,'n'); +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; # # 1) Test that subquery materialization is setup for query with @@ -1832,10 +1834,6 @@ id select_type table type possible_keys key key_len ref rows Extra # 3) Test that subquery materialization is setup for query with # premature optimize() exit due to "Select tables optimized away" # -# NOTE: The result of this query is actually wrong; it should be NULL -# See BUG#47762. Even so, the test case is still needed to test -# that the HAVING subquery does not crash the server -# SELECT MIN(pk) FROM t1 WHERE pk=NULL @@ -1902,8 +1900,10 @@ HAVING ('m') IN ( SELECT v 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 +1 PRIMARY t1 index NULL PRIMARY 4 NULL 2 Using where; Using index 3 SUBQUERY t2 ALL NULL NULL NULL NULL 2 +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +set @@optimizer_switch=@save_optimizer_switch; # # Cleanup for BUG#46680 # diff --git a/mysql-test/r/group_by.result b/mysql-test/r/group_by.result index 426e9a88262..33376b22bc6 100644 --- a/mysql-test/r/group_by.result +++ b/mysql-test/r/group_by.result @@ -1543,8 +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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 144 +1 PRIMARY t1 ALL NULL NULL NULL NULL 144 Using where; FirstMatch(t1) CREATE TABLE t2 (a INT, b INT, KEY(a)); INSERT INTO t2 VALUES (1, 1), (2, 2), (3,3), (4,4); EXPLAIN SELECT a, SUM(b) FROM t2 GROUP BY a LIMIT 2; diff --git a/mysql-test/r/group_min_max.result b/mysql-test/r/group_min_max.result index 974521ec120..20b0c054480 100644 --- a/mysql-test/r/group_min_max.result +++ b/mysql-test/r/group_min_max.result @@ -1360,12 +1360,158 @@ group by a1,a2,b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 index NULL idx_t1_1 163 NULL 128 Using where; Using index 2 DEPENDENT SUBQUERY t2 index NULL idx_t2_1 163 NULL 164 Using where; Using index +select a1,a2,b,min(c),max(c) from t1 +where exists ( select * from t2 where t2.c = t1.c ) +group by a1,a2,b; +a1 a2 b min(c) max(c) +a a a a111 d111 +a a b e112 h112 +a b a i121 l121 +a b b m122 p122 +b a a a211 d211 +b a b e212 h212 +b b a i221 l221 +b b b m222 p222 +c a a a311 d311 +c a b e312 h312 +c b a i321 l321 +c b b m322 p322 +d a a a411 d411 +d a b e412 h412 +d b a i421 l421 +d b b m422 p422 explain select a1,a2,b,min(c),max(c) from t1 where exists ( select * from t2 where t2.c > 'b1' ) group by a1,a2,b; id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 range NULL idx_t1_1 147 NULL 17 Using index for group-by +1 PRIMARY t1 range NULL idx_t1_1 147 NULL 17 Using where; Using index for group-by 2 SUBQUERY t2 index NULL idx_t2_1 163 NULL 164 Using where; Using index +select a1,a2,b,min(c),max(c) from t1 +where exists ( select * from t2 where t2.c > 'b1' ) +group by a1,a2,b; +a1 a2 b min(c) max(c) +a a a a111 d111 +a a b e112 h112 +a b a i121 l121 +a b b m122 p122 +b a a a211 d211 +b a b e212 h212 +b b a i221 l221 +b b b m222 p222 +c a a a311 d311 +c a b e312 h312 +c b a i321 l321 +c b b m322 p322 +d a a a411 d411 +d a b e412 h412 +d b a i421 l421 +d b b m422 p422 +explain select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 where t1.b > 'a' and t2.c > 'b1' ) +group by a1,a2,b; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 range NULL idx_t1_1 147 NULL 17 Using where; Using index for group-by +2 DEPENDENT SUBQUERY t2 index NULL idx_t2_1 163 NULL 164 Using where; Using index +select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 where t1.b > 'a' and t2.c > 'b1' ) +group by a1,a2,b; +a1 a2 b c min(c) max(c) +a a b h112 e112 h112 +a b b p122 m122 p122 +b a b h212 e212 h212 +b b b p222 m222 p222 +c a b h312 e312 h312 +c b b p322 m322 p322 +d a b h412 e412 h412 +d b b p422 m422 p422 +explain select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 +where t2.c in (select c from t3 where t3.c > t1.b) and +t2.c > 'b1' ) +group by a1,a2,b; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 range NULL idx_t1_1 147 NULL 17 Using where; Using index for group-by +2 DEPENDENT SUBQUERY t2 index NULL idx_t2_1 163 NULL 164 Using where; Using index +2 DEPENDENT SUBQUERY t3 index NULL idx_t3_1 10 NULL 192 Using where; Using index; FirstMatch(t2) +select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 +where t2.c in (select c from t3 where t3.c > t1.b) and +t2.c > 'b1' ) +group by a1,a2,b; +a1 a2 b c min(c) max(c) +a a a d111 a111 d111 +a a b h112 e112 h112 +a b a l121 i121 l121 +a b b p122 m122 p122 +b a a d211 a211 d211 +b a b h212 e212 h212 +b b a l221 i221 l221 +b b b p222 m222 p222 +c a a d311 a311 d311 +c a b h312 e312 h312 +c b a l321 i321 l321 +c b b p322 m322 p322 +d a a d411 a411 d411 +d a b h412 e412 h412 +d b a l421 i421 l421 +d b b p422 m422 p422 +explain select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 where t1.c > 'a' and t2.c > 'b1' ) +group by a1,a2,b; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL idx_t1_1 163 NULL 128 Using where; Using index +2 DEPENDENT SUBQUERY t2 index NULL idx_t2_1 163 NULL 164 Using where; Using index +select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 where t1.c > 'a' and t2.c > 'b1' ) +group by a1,a2,b; +a1 a2 b c min(c) max(c) +a a a a111 a111 d111 +a a b e112 e112 h112 +a b a i121 i121 l121 +a b b m122 m122 p122 +b a a a211 a211 d211 +b a b e212 e212 h212 +b b a i221 i221 l221 +b b b m222 m222 p222 +c a a a311 a311 d311 +c a b e312 e312 h312 +c b a i321 i321 l321 +c b b m322 m322 p322 +d a a a411 a411 d411 +d a b e412 e412 h412 +d b a i421 i421 l421 +d b b m422 m422 p422 +explain select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 +where t2.c in (select c from t3 where t3.c > t1.c) and +t2.c > 'b1' ) +group by a1,a2,b; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL idx_t1_1 163 NULL 128 Using where; Using index +2 DEPENDENT SUBQUERY t2 index NULL idx_t2_1 163 NULL 164 Using where; Using index +2 DEPENDENT SUBQUERY t3 index NULL idx_t3_1 10 NULL 192 Using where; Using index; FirstMatch(t2) +select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 +where t2.c in (select c from t3 where t3.c > t1.c) and +t2.c > 'b1' ) +group by a1,a2,b; +a1 a2 b c min(c) max(c) +a a a a111 a111 d111 +a a b e112 e112 h112 +a b a i121 i121 l121 +a b b m122 m122 p122 +b a a a211 a211 d211 +b a b e212 e212 h212 +b b a i221 i221 l221 +b b b m222 m222 p222 +c a a a311 a311 d311 +c a b e312 e312 h312 +c b a i321 i321 l321 +c b b m322 m322 o322 +d a a a411 a411 d411 +d a b e412 e412 h412 +d b a i421 i421 l421 +d b b m422 m422 o422 explain select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 range idx_t1_0,idx_t1_1,idx_t1_2 idx_t1_1 147 NULL 17 Using where; Using index for group-by @@ -2246,17 +2392,17 @@ EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE EXISTS (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 index -2 SUBQUERY t1 index NULL a 10 NULL 15 Using index +2 SUBQUERY t1 index NULL a 10 NULL 1 Using index EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12; id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t1_outer index NULL a 10 NULL 15 Using index 2 SUBQUERY t1 range NULL a 5 NULL 8 Using index for group-by 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 -2 SUBQUERY t1 range NULL a 5 NULL 8 Using index for group-by +2 DEPENDENT SUBQUERY t1 index NULL a 10 NULL 1 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); id select_type table type possible_keys key key_len ref rows Extra diff --git a/mysql-test/r/index_merge_myisam.result b/mysql-test/r/index_merge_myisam.result index 4871f42cffc..83edf674f81 100644 --- a/mysql-test/r/index_merge_myisam.result +++ b/mysql-test/r/index_merge_myisam.result @@ -1484,7 +1484,7 @@ EXPLAIN SELECT t1.f1 FROM t1 WHERE (SELECT COUNT(*) FROM t2 WHERE t2.f3 = 'h' AND t2.f2 = t1.f1) = 0 AND t1.f1 = 2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system PRIMARY NULL NULL NULL 1 -2 DEPENDENT SUBQUERY t2 ref f2,f3 f2 5 1 Using where +2 DEPENDENT SUBQUERY t2 ref f2,f3 f2 5 const 1 Using where DROP TABLE t1,t2; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); diff --git a/mysql-test/r/join.result b/mysql-test/r/join.result index 935e3ee3b62..e3ef617503f 100644 --- a/mysql-test/r/join.result +++ b/mysql-test/r/join.result @@ -1314,7 +1314,7 @@ WHERE t1.f1 IN (SELECT f1 FROM t1) AND t1.f1 = t2.f1 OR t1.f1 = 9; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 2 Using where 1 PRIMARY t2 ALL PRIMARY NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) -2 SUBQUERY t1 index NULL PRIMARY 4 NULL 2 Using index +2 DEPENDENT SUBQUERY t1 unique_subquery PRIMARY PRIMARY 4 func 1 Using index SELECT STRAIGHT_JOIN * FROM t1 JOIN t2 ON t2.f2 = t1.f1 WHERE t1.f1 IN (SELECT f1 FROM t1) AND t1.f1 = t2.f1 OR t1.f1 = 9; f1 f2 f1 f2 diff --git a/mysql-test/r/join_nested.result b/mysql-test/r/join_nested.result index 9d60059ac28..3dc6a6338cb 100644 --- a/mysql-test/r/join_nested.result +++ b/mysql-test/r/join_nested.result @@ -854,7 +854,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Warnings: -Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on((((`test`.`t3`.`a` = 1) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`))) and (`test`.`t3`.`b` is not null))) where 1 +Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`) and (`test`.`t3`.`b` is not null))) where 1 SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b FROM (t3,t4) LEFT JOIN @@ -966,7 +966,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t8(b); EXPLAIN EXTENDED SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, @@ -1015,7 +1015,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t1(b); CREATE INDEX idx_a ON t0(a); EXPLAIN EXTENDED @@ -1065,7 +1065,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b FROM t0,t1 diff --git a/mysql-test/r/join_nested_jcl6.result b/mysql-test/r/join_nested_jcl6.result index 3345540af96..26c0a9cadfe 100644 --- a/mysql-test/r/join_nested_jcl6.result +++ b/mysql-test/r/join_nested_jcl6.result @@ -239,7 +239,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join) 1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t7.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) Warnings: -Note 1003 select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and (`test`.`t8`.`b` = `test`.`t7`.`b`)) and (`test`.`t7`.`b` is not null))) where 1 +Note 1003 select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t8`.`b` = `test`.`t7`.`b`) and (`test`.`t7`.`b` is not null))) where 1 SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b FROM (t6, t7) LEFT JOIN @@ -560,7 +560,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) where ((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) where ((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`))) SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b FROM t0,t1 @@ -656,7 +656,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) SELECT t9.a,t9.b FROM t9; a b @@ -847,7 +847,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t4 hash_ALL NULL #hash#$hj 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) Warnings: -Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) where (`test`.`t1`.`a` <= 2) +Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) where (`test`.`t1`.`a` <= 2) CREATE INDEX idx_b ON t2(b); EXPLAIN EXTENDED SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b @@ -861,7 +861,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join) Warnings: -Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on((((`test`.`t3`.`a` = 1) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`))) and (`test`.`t3`.`b` is not null))) where 1 +Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`) and (`test`.`t3`.`b` is not null))) where 1 SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b FROM (t3,t4) LEFT JOIN @@ -923,7 +923,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t4(b); CREATE INDEX idx_b ON t5(b); EXPLAIN EXTENDED @@ -973,7 +973,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join) 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t8(b); EXPLAIN EXTENDED SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, @@ -1022,7 +1022,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t1(b); CREATE INDEX idx_a ON t0(a); EXPLAIN EXTENDED @@ -1072,7 +1072,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t8 ref idx_b idx_b 5 test.t7.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t7`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t7`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b FROM t0,t1 diff --git a/mysql-test/r/key.result b/mysql-test/r/key.result index fcc09a0244d..46313411e7d 100644 --- a/mysql-test/r/key.result +++ b/mysql-test/r/key.result @@ -598,7 +598,7 @@ VALUES EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12; id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t1_outer index NULL a 10 NULL 15 Using index 2 SUBQUERY t1 range NULL a 5 NULL 8 Using index for group-by SELECT 1 as RES FROM t1 AS t1_outer WHERE (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12; diff --git a/mysql-test/r/myisam_mrr.result b/mysql-test/r/myisam_mrr.result index 2f1560ea981..38e1841dd41 100644 --- a/mysql-test/r/myisam_mrr.result +++ b/mysql-test/r/myisam_mrr.result @@ -347,10 +347,10 @@ WHERE t2.int_key IS NULL GROUP BY t2.pk ); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE -2 SUBQUERY t2 ref int_key int_key 5 1 100.00 Using index condition; Using where; Using filesort +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +2 SUBQUERY t2 ref int_key int_key 5 const 1 100.00 Using index condition; Using where; Using filesort Warnings: -Note 1003 select min(`test`.`t1`.`pk`) AS `MIN(t1.pk)` from `test`.`t1` where 0 +Note 1003 select min(`test`.`t1`.`pk`) AS `MIN(t1.pk)` from `test`.`t1` where exists(select `test`.`t2`.`pk` from `test`.`t2` where isnull(`test`.`t2`.`int_key`) group by `test`.`t2`.`pk`) DROP TABLE t1, t2; # # BUG#42048 Discrepancy between MyISAM and Maria's ICP implementation diff --git a/mysql-test/r/optimizer_switch.result b/mysql-test/r/optimizer_switch.result index 0ae1d54fc7a..9d90aba3fb2 100644 --- a/mysql-test/r/optimizer_switch.result +++ b/mysql-test/r/optimizer_switch.result @@ -4,19 +4,19 @@ # select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch='index_merge=off,index_merge_union=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch='index_merge_union=on'; select @@optimizer_switch; @@optimizer_switch -index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch='default,index_merge_sort_union=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch=4; ERROR 42000: Variable 'optimizer_switch' can't be set to the value of '4' set optimizer_switch=NULL; @@ -43,60 +43,60 @@ set optimizer_switch=default; set optimizer_switch='index_merge=off,index_merge_union=off,default'; select @@optimizer_switch; @@optimizer_switch -index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch=default; select @@global.optimizer_switch; @@global.optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set @@global.optimizer_switch=default; select @@global.optimizer_switch; @@global.optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on # # Check index_merge's @@optimizer_switch flags # select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on BUG#37120 optimizer_switch allowable values not according to specification select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch='default,materialization=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch='default,semijoin=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch='default,loosescan=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch='default,semijoin=off,materialization=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch='default,materialization=off,semijoin=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch='default,semijoin=off,materialization=off,loosescan=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,in_to_exists=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch='default,semijoin=off,loosescan=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,in_to_exists=on,semijoin=off,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch='default,materialization=off,loosescan=off'; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=off,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on set optimizer_switch=default; select @@optimizer_switch; @@optimizer_switch -index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,index_condition_pushdown=on,firstmatch=on,loosescan=on,materialization=off,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr_sort_keys=on,outer_join_with_cache=off,semijoin_with_cache=off,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on diff --git a/mysql-test/r/ps_11bugs.result b/mysql-test/r/ps_11bugs.result index 5c11163ab9e..f9f0525646d 100644 --- a/mysql-test/r/ps_11bugs.result +++ b/mysql-test/r/ps_11bugs.result @@ -120,9 +120,9 @@ create table t1 (a int primary key); insert into t1 values (1); explain select * from t1 where 3 in (select (1+1) union select 1); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible HAVING -3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL Impossible HAVING +1 PRIMARY t1 system NULL NULL NULL NULL 1 +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL select * from t1 where 3 in (select (1+1) union select 1); a diff --git a/mysql-test/r/strict.result b/mysql-test/r/strict.result index 4cd68a52748..88c6ddbfd95 100644 --- a/mysql-test/r/strict.result +++ b/mysql-test/r/strict.result @@ -1107,8 +1107,6 @@ count(*) 7 Warnings: Error 1411 Incorrect datetime value: '2004.12.12 10:22:61' for function str_to_date -Error 1411 Incorrect datetime value: '2004.12.12 10:22:61' for function str_to_date -Error 1411 Incorrect datetime value: '2004.12.12 10:22:61' for function str_to_date drop table t1; create table t1 (col1 char(3), col2 integer); insert into t1 (col1) values (cast(1000 as char(3))); diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result index 0803acd8bd3..f289e46c42c 100644 --- a/mysql-test/r/subselect.result +++ b/mysql-test/r/subselect.result @@ -273,7 +273,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`)))) select * from t3 where a >= all (select b from t2); a 7 @@ -423,7 +423,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where 1 +Note 1003 select 1 AS `1` from `test`.`t1` where (1 = (select 1 union select 1)) drop table t1; CREATE TABLE `t1` ( `numeropost` mediumint(8) unsigned NOT NULL auto_increment, @@ -511,7 +511,6 @@ ERROR 21000: Subquery returns more than 1 row show warnings; Level Code Message Error 1242 Subquery returns more than 1 row -Error 1028 Sort aborted drop table t1; create table t1 (a int); insert into t1 values (1),(2),(3); @@ -913,7 +912,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using where; Using index 2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` +Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`t2`.`a` from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` drop table t1,t2,t3; create table t1 (a float); select 10.5 IN (SELECT * from t1 LIMIT 1); @@ -1184,9 +1183,9 @@ SELECT 0 IN (SELECT 1 FROM t1 a); EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables Warnings: -Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)` +Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (<cache>(0) = 1))) AS `0 IN (SELECT 1 FROM t1 a)` INSERT INTO t1 (pseudo) VALUES ('test1'); SELECT 0 IN (SELECT 1 FROM t1 a); 0 IN (SELECT 1 FROM t1 a) @@ -1194,9 +1193,9 @@ SELECT 0 IN (SELECT 1 FROM t1 a); EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables Warnings: -Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)` +Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (<cache>(0) = 1))) AS `0 IN (SELECT 1 FROM t1 a)` drop table t1; CREATE TABLE `t1` ( `i` int(11) NOT NULL default '0', @@ -1507,7 +1506,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < (select max(NULL) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` < (select max(NULL) from `test`.`t2`)))) select * from t3 where a >= some (select b from t2); a explain extended select * from t3 where a >= some (select b from t2); @@ -1515,7 +1514,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(NULL) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= (select min(NULL) from `test`.`t2`)))) select * from t3 where a >= all (select b from t2 group by 1); a 6 @@ -1526,7 +1525,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < <max>(select NULL from `test`.`t2` group by 1))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` < <max>(select NULL from `test`.`t2` group by 1)))) select * from t3 where a >= some (select b from t2 group by 1); a explain extended select * from t3 where a >= some (select b from t2 group by 1); @@ -1534,39 +1533,39 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= <min>(select NULL from `test`.`t2` group by 1))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= <min>(select NULL from `test`.`t2` group by 1)))) select * from t3 where NULL >= any (select b from t2); a explain extended select * from t3 where NULL >= any (select b from t2); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= (select min(NULL) from `test`.`t2`)))) select * from t3 where NULL >= any (select b from t2 group by 1); a explain extended select * from t3 where NULL >= any (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= <min>(select NULL from `test`.`t2` group by 1)))) select * from t3 where NULL >= some (select b from t2); a explain extended select * from t3 where NULL >= some (select b from t2); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= (select min(NULL) from `test`.`t2`)))) select * from t3 where NULL >= some (select b from t2 group by 1); a explain extended select * from t3 where NULL >= some (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= <min>(select NULL from `test`.`t2` group by 1)))) insert into t2 values (2,2), (2,1), (3,3), (3,1); select * from t3 where a > all (select max(b) from t2 group by a); a @@ -1575,9 +1574,9 @@ a explain extended select * from t3 where a > all (select max(b) from t2 group by a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where -2 SUBQUERY t2 ALL NULL NULL NULL NULL 4 100.00 Using temporary; Using filesort +2 SUBQUERY t2 ALL NULL NULL NULL NULL 4 100.00 Using temporary Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`)))) drop table t2, t3; CREATE TABLE `t1` ( `id` mediumint(9) NOT NULL auto_increment, `taskid` bigint(20) NOT NULL default '0', `dbid` int(11) NOT NULL default '0', `create_date` datetime NOT NULL default '0000-00-00 00:00:00', `last_update` datetime NOT NULL default '0000-00-00 00:00:00', PRIMARY KEY (`id`)) ENGINE=MyISAM CHARSET=latin1 AUTO_INCREMENT=3 ; INSERT INTO `t1` (`id`, `taskid`, `dbid`, `create_date`,`last_update`) VALUES (1, 1, 15, '2003-09-29 10:31:36', '2003-09-29 10:31:36'), (2, 1, 21, now(), now()); @@ -1628,7 +1627,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 UNION t1 system NULL NULL NULL NULL 1 100.00 NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select 'e' AS `s1` from `test`.`t1` where 1 +Note 1003 select 'e' AS `s1` from `test`.`t1` where <nop>(<in_optimizer>('f',('f' > <min>(select 'e' from `test`.`t1` union select 'e' from `test`.`t1`)))) drop table t1; CREATE TABLE t1 (number char(11) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1; INSERT INTO t1 VALUES ('69294728265'),('18621828126'),('89356874041'),('95895001874'); @@ -2835,14 +2834,13 @@ 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 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where +1 PRIMARY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; FirstMatch(t1) 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')) +Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`two` = `test`.`t1`.`two`) and (`test`.`t2`.`one` = `test`.`t1`.`one`) and (`test`.`t2`.`flag` = 'N')) 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 -2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; Using temporary Warnings: Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<expr_cache><`test`.`t1`.`two`,`test`.`t1`.`one`>(<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where (`test`.`t2`.`flag` = '0') group by `test`.`t2`.`one`,`test`.`t2`.`two` having (trigcond(((<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) or isnull(`test`.`t2`.`one`))) and trigcond(((<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`) or isnull(`test`.`t2`.`two`))) and trigcond(<is_not_null_test>(`test`.`t2`.`one`)) and trigcond(<is_not_null_test>(`test`.`t2`.`two`)))))) AS `test` from `test`.`t1` DROP TABLE t1,t2; @@ -3114,10 +3112,10 @@ SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 2), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); a -2 -4 1 +2 3 +4 SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 1), (SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b)); @@ -3126,8 +3124,8 @@ SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); a -2 1 +2 3 4 SELECT a FROM t1 @@ -3424,7 +3422,7 @@ 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary ALTER TABLE t1 ADD INDEX(a); SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a); a b @@ -3435,7 +3433,7 @@ 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 index NULL a 8 NULL 1 DROP TABLE t1; create table t1( f1 int,f2 int); insert into t1 values (1,1),(2,2); @@ -4324,16 +4322,16 @@ 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary 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,<exists>(select 1 from `test`.`t1` group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(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 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using where; Using temporary 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,<exists>(select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(1))))) DROP TABLE t1; # # Bug#45061: Incorrectly market field caused wrong result. @@ -5016,11 +5014,10 @@ explain SELECT * FROM ot1,ot4 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 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) +1 PRIMARY ot1 ALL NULL NULL NULL NULL 2 Start temporary +1 PRIMARY it2 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) +1 PRIMARY it3 ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join) +1 PRIMARY ot4 ALL NULL NULL NULL NULL 8 Using where; End temporary; Using join buffer (flat, BNL join) DROP TABLE IF EXISTS ot1, ot4, it2, it3; # # Bug#729039: NULL keys used to evaluate subquery @@ -5084,7 +5081,7 @@ WHERE ('0') IN ( SELECT a FROM t1 GROUP BY a ) GROUP BY b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary SELECT b FROM t1 WHERE ('0') IN ( SELECT a FROM t1 GROUP BY a ) GROUP BY b; @@ -5109,3 +5106,25 @@ SELECT 1 as foo FROM t1 WHERE a < SOME ); foo DROP TABLE t1; +# +# BUG#779885: Crash in eliminate_item_equal with materialization=on in +# maria-5.3 +# +CREATE TABLE t1 ( f1 int ); +INSERT INTO t1 VALUES (19), (20); +CREATE TABLE t2 ( f10 varchar(32) ); +INSERT INTO t2 VALUES ('c'),('d'); +CREATE TABLE t3 ( f10 varchar(32) ); +INSERT INTO t3 VALUES ('a'),('b'); +SELECT * +FROM t1 +WHERE +( 't' ) IN ( +SELECT t3.f10 +FROM t3 +JOIN t2 +ON t2.f10 = t3.f10 +); +f1 +DROP TABLE t1,t2,t3; +End of 5.3 tests diff --git a/mysql-test/r/subselect3.result b/mysql-test/r/subselect3.result index 3d7cbdd9ff7..166014c005d 100644 --- a/mysql-test/r/subselect3.result +++ b/mysql-test/r/subselect3.result @@ -28,7 +28,7 @@ select a, oref, a in (select max(ie) from t1 where oref=t2.oref group by grp) Z from t2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary Warnings: Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1 Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select max(`test`.`t1`.`ie`) from `test`.`t1` where (`test`.`t1`.`oref` = `test`.`t2`.`oref`) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`))))))) AS `Z` from `test`.`t2` @@ -37,7 +37,7 @@ select a, oref from t2 where a in (select max(ie) from t1 where oref=t2.oref group by grp); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary Warnings: Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1 Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select max(`test`.`t1`.`ie`) from `test`.`t1` where (`test`.`t1`.`oref` = `test`.`t2`.`oref`) group by `test`.`t1`.`grp` having (<cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) @@ -69,7 +69,7 @@ set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=o explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 2 100.00 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary Warnings: Note 1003 select <expr_cache><`test`.`t3`.`a`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select max(`test`.`t1`.`ie`) from `test`.`t1` where (`test`.`t1`.`oref` = 4) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t3`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`))))))) AS `a in (select max(ie) from t1 where oref=4 group by grp)` from `test`.`t3` set @@optimizer_switch=@save_optimizer_switch; @@ -121,7 +121,7 @@ Handler_read_key 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_rnd 0 -Handler_read_rnd_next 29 +Handler_read_rnd_next 35 select 'No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1.' Z; Z No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1. @@ -163,7 +163,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 100.00 Using where Warnings: Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1 -Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond(((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`)))) having trigcond(<is_not_null_test>(`test`.`t1`.`a`))))) AS `Z` from `test`.`t3` +Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select `test`.`t1`.`a` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond(((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) and (`test`.`t2`.`a` = `test`.`t1`.`b`)) having trigcond(<is_not_null_test>(`test`.`t1`.`a`))))) AS `Z` from `test`.`t3` drop table t1, t2, t3; create table t1 (a int NOT NULL, b int NOT NULL, key(a)); insert into t1 values @@ -191,7 +191,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 100.00 Using where Warnings: Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1 -Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`)))))) AS `Z` from `test`.`t3` +Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select `test`.`t1`.`a` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`)) and (`test`.`t2`.`a` = `test`.`t1`.`b`))))) AS `Z` from `test`.`t3` drop table t1,t2,t3; create table t1 (oref int, grp int); insert into t1 (oref, grp) values @@ -212,7 +212,7 @@ select a, oref, a in (select count(*) from t1 group by grp having grp=t2.oref) Z from t2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary Warnings: Note 1276 Field or reference 't2.oref' of SELECT #2 was resolved in SELECT #1 Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select count(0) from `test`.`t1` group by `test`.`t1`.`grp` having ((`test`.`t1`.`grp` = `test`.`t2`.`oref`) and trigcond((<cache>(`test`.`t2`.`a`) = <ref_null_helper>(count(0)))))))) AS `Z` from `test`.`t2` @@ -463,7 +463,7 @@ group by grp having min(ie) > 1) Z from t2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 7 -2 DEPENDENT SUBQUERY t1 ref idx idx 5 test.t2.oref 2 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ref idx idx 5 test.t2.oref 2 Using where; Using temporary select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp having min(ie) > 1) Z @@ -624,7 +624,7 @@ explain select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 7 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 Using where; Using temporary select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2; oref a Z ee NULL 0 @@ -711,7 +711,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using index 2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where Warnings: -Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t1`.`a`) and (not(<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t1` where ((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`)) having <is_not_null_test>(`test`.`t1`.`a`))))))) +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t1`.`a`) and (not(<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`t1`.`a` from `test`.`t1` where trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) having trigcond(<is_not_null_test>(`test`.`t1`.`a`)))))))) SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1)); a SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1 WHERE a > 4)); @@ -732,7 +732,7 @@ WHERE t3.name='xxx' AND t2.id=t3.id); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where 2 DEPENDENT SUBQUERY t2 eq_ref PRIMARY PRIMARY 4 func 1 Using where; Using index; Full scan on NULL key -2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 func 1 Using index condition; Using where; Full scan on NULL key +2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 test.t2.id 1 Using where SELECT * FROM t1 WHERE t1.id NOT IN (SELECT t2.id FROM t2,t3 WHERE t3.name='xxx' AND t2.id=t3.id); @@ -841,11 +841,16 @@ x ROW(11, 12) = (SELECT MAX(x), 22) ROW(11, 12) IN (SELECT MAX(x), 22) 1 0 0 2 0 0 11 0 0 -# 2nd and 3rd columns should be same for x == 11 only +# 2nd and 3rd columns should be same +EXPLAIN SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 +3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1; x ROW(11, 12) = (SELECT MAX(x), 12) ROW(11, 12) IN (SELECT MAX(x), 12) -1 0 1 -2 0 1 +1 0 0 +2 0 0 11 1 1 DROP TABLE t1; # both columns should be same @@ -971,7 +976,7 @@ i1 i2 # Baseline: SHOW STATUS LIKE '%Handler_read_rnd_next'; Variable_name Value -Handler_read_rnd_next 18 +Handler_read_rnd_next 17 INSERT INTO t1 VALUES (NULL, NULL); FLUSH STATUS; @@ -988,7 +993,7 @@ i1 i2 # (read record from t1, but do not read from t2) SHOW STATUS LIKE '%Handler_read_rnd_next'; Variable_name Value -Handler_read_rnd_next 19 +Handler_read_rnd_next 18 set @@optimizer_switch=@save_optimizer_switch2; DROP TABLE t1,t2; End of 5.1 tests @@ -1023,11 +1028,10 @@ 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 t11 ALL NULL NULL NULL NULL 8 Using where; Using temporary; Using filesort; Start temporary +1 PRIMARY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join) +1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; End temporary; Using join buffer (flat, BNL join) 1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (flat, BNL join) -1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (flat, BNL join) -2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where -2 SUBQUERY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join) select t21.* from t21,t22 where t21.a = t22.a and t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a; a b c @@ -1040,9 +1044,8 @@ explain select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X; 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 -3 SUBQUERY Z ALL NULL NULL NULL NULL 2 +2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where; Start temporary +2 DEPENDENT SUBQUERY Z ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join) 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 NULL @@ -1112,8 +1115,7 @@ 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 -3 SUBQUERY t1 ALL NULL NULL NULL NULL 20 +1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using where; FirstMatch(<derived2>) 2 DERIVED t0 ALL NULL NULL NULL NULL 11 drop table t0, t1; create table t0 (a int); @@ -1125,18 +1127,16 @@ create table t3 (a int); 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 -2 SUBQUERY t1 range kp1 kp1 5 NULL 48 Using where; Using index +1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where +1 PRIMARY t1 ref kp1 kp1 5 test.t3.a 1 Using index; FirstMatch(t3) create table t4 (pk int primary key); insert into t4 select a from t3; explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20 and t4.pk=t1.c); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t3 ALL NULL NULL NULL NULL 100 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 -2 SUBQUERY t1 range kp1 kp1 5 NULL 48 Using index condition; Using where; Rowid-ordered scan -2 SUBQUERY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index +1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where +1 PRIMARY t1 ref kp1 kp1 5 test.t3.a 1 Using where +1 PRIMARY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index; FirstMatch(t3) drop table t1, t3, t4; create table t1 (a int) as select * from t0 where a < 5; set @save_max_heap_table_size=@@max_heap_table_size; @@ -1167,9 +1167,8 @@ 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 t3 ref a a 5 test.t2.a 1 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Start temporary +1 PRIMARY t3 ref a a 5 test.t2.a 1 End temporary select * from t3 where a in (select a from t2); a filler 1 filler @@ -1215,47 +1214,44 @@ create table t3 (a int, b int, filler char(100), key(a)); 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 t3 ref a a 5 test.t2.a 10 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where; Start temporary +1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join) +1 PRIMARY t3 ref a a 5 test.t2.a 10 End temporary 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) -2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where -2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where +2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join) explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where -2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where +2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join) explain select straight_join * from t2 X, t2 Y where X.a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY X ALL NULL NULL NULL NULL 10 Using where 1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) -2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where +2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join) create table t0 (a int, b int); insert into t0 values(1,1); explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 system NULL NULL NULL NULL 1 -1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10 -1 PRIMARY t3 ref a a 5 test.t2.a 10 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where +1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where; Start temporary +1 PRIMARY t3 ref a a 5 test.t2.a 10 End temporary create table t4 as select a as x, a as y from t1; explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 system NULL NULL NULL NULL 1 -1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10 -1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where -2 SUBQUERY t4 ALL NULL NULL NULL NULL 10 Using where +1 PRIMARY t4 ALL NULL NULL NULL NULL 10 Using where; Start temporary +1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where; End temporary drop table t0,t1,t2,t3,t4; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); @@ -1264,14 +1260,12 @@ insert into t1 select A.a, B.a, 'filler' from t0 A, t0 B; 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 -2 SUBQUERY t1 ref a a 10 const,test.t2.a 8 Using index +1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan +1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) explain select * from t2 where (b,a) in (select a,b from t1 where a=3); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where -1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 -2 SUBQUERY t1 ref a a 10 const,test.t2.a 8 Using index +1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan +1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) drop table t1,t2; create table t1 (a int, b int); insert into t1 select a,a from t0; @@ -1280,16 +1274,14 @@ insert into t2 select A.a + 10*B.a, A.a + 10*B.a from t0 A, t0 B; 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 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 100 +1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Start temporary +1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; End temporary; Using join buffer (flat, BNL join) 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 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 100 +1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Start temporary +1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; End temporary; Using join buffer (flat, BNL join) set @@optimizer_search_depth=@save_optimizer_search_depth; set @@optimizer_switch=@save_optimizer_switch; drop table t0, t1, t2; @@ -1299,9 +1291,8 @@ create table t1 as select * from t0; 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 +1 PRIMARY t0 ALL NULL NULL NULL NULL 2 Start temporary +1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer (flat, BNL join) select * from t0 where a in (select a from t1); a 10.24 @@ -1313,9 +1304,8 @@ create table t1 as select * from t0; 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 +1 PRIMARY t0 ALL NULL NULL NULL NULL 2 Start temporary +1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer (flat, BNL join) select * from t0 where a in (select a from t1); a 2008-01-01 @@ -1328,11 +1318,10 @@ create table t2 as select a as a, a as b from t0 where a < 3; 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 -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) +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Start temporary +1 PRIMARY X ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 PRIMARY Y ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) +1 PRIMARY Z ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join) drop table t0,t1,t2; BUG#37842: Assertion in DsMrr_impl::dsmrr_init, at handler.cc:4307 @@ -1402,10 +1391,9 @@ 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 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 +1 PRIMARY cona ALL NULL NULL NULL NULL 2 100.00 Using where; Start temporary +1 PRIMARY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 Using where +1 PRIMARY a eq_ref PRIMARY PRIMARY 4 test.c.idObj 1 100.00 Using index; End temporary Warnings: Note 1003 select `test`.`a`.`idIndividual` AS `idIndividual` from `test`.`t1` `a` semi join (`test`.`t3` `cona` join `test`.`t2` `c`) where ((`test`.`c`.`idContact` = `test`.`cona`.`idContact`) and (`test`.`a`.`idIndividual` = `test`.`c`.`idObj`) and (`test`.`cona`.`postalStripped` = 'T2H3B2')) drop table t1,t2,t3; diff --git a/mysql-test/r/subselect3_jcl6.result b/mysql-test/r/subselect3_jcl6.result index b8a30ce1722..c59d11edc5e 100644 --- a/mysql-test/r/subselect3_jcl6.result +++ b/mysql-test/r/subselect3_jcl6.result @@ -35,7 +35,7 @@ select a, oref, a in (select max(ie) from t1 where oref=t2.oref group by grp) Z from t2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary Warnings: Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1 Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select max(`test`.`t1`.`ie`) from `test`.`t1` where (`test`.`t1`.`oref` = `test`.`t2`.`oref`) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`))))))) AS `Z` from `test`.`t2` @@ -44,7 +44,7 @@ select a, oref from t2 where a in (select max(ie) from t1 where oref=t2.oref group by grp); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary Warnings: Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1 Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select max(`test`.`t1`.`ie`) from `test`.`t1` where (`test`.`t1`.`oref` = `test`.`t2`.`oref`) group by `test`.`t1`.`grp` having (<cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) @@ -76,7 +76,7 @@ set @@optimizer_switch="partial_match_rowid_merge=off,partial_match_table_scan=o explain extended select a in (select max(ie) from t1 where oref=4 group by grp) from t3; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 2 100.00 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary Warnings: Note 1003 select <expr_cache><`test`.`t3`.`a`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select max(`test`.`t1`.`ie`) from `test`.`t1` where (`test`.`t1`.`oref` = 4) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t3`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`))))))) AS `a in (select max(ie) from t1 where oref=4 group by grp)` from `test`.`t3` set @@optimizer_switch=@save_optimizer_switch; @@ -128,7 +128,7 @@ Handler_read_key 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_rnd 0 -Handler_read_rnd_next 29 +Handler_read_rnd_next 35 select 'No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1.' Z; Z No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1. @@ -170,7 +170,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 100.00 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan Warnings: Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1 -Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond(((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`)))) having trigcond(<is_not_null_test>(`test`.`t1`.`a`))))) AS `Z` from `test`.`t3` +Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select `test`.`t1`.`a` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond(((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) and (`test`.`t2`.`a` = `test`.`t1`.`b`)) having trigcond(<is_not_null_test>(`test`.`t1`.`a`))))) AS `Z` from `test`.`t3` drop table t1, t2, t3; create table t1 (a int NOT NULL, b int NOT NULL, key(a)); insert into t1 values @@ -198,7 +198,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 100.00 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan Warnings: Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1 -Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`)))))) AS `Z` from `test`.`t3` +Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<expr_cache><`test`.`t3`.`a`,`test`.`t3`.`oref`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(select `test`.`t1`.`a` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`)) and (`test`.`t2`.`a` = `test`.`t1`.`b`))))) AS `Z` from `test`.`t3` drop table t1,t2,t3; create table t1 (oref int, grp int); insert into t1 (oref, grp) values @@ -219,7 +219,7 @@ select a, oref, a in (select count(*) from t1 group by grp having grp=t2.oref) Z from t2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary Warnings: Note 1276 Field or reference 't2.oref' of SELECT #2 was resolved in SELECT #1 Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`oref`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select count(0) from `test`.`t1` group by `test`.`t1`.`grp` having ((`test`.`t1`.`grp` = `test`.`t2`.`oref`) and trigcond((<cache>(`test`.`t2`.`a`) = <ref_null_helper>(count(0)))))))) AS `Z` from `test`.`t2` @@ -470,7 +470,7 @@ group by grp having min(ie) > 1) Z from t2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 7 -2 DEPENDENT SUBQUERY t1 ref idx idx 5 test.t2.oref 2 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ref idx idx 5 test.t2.oref 2 Using where; Using temporary select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp having min(ie) > 1) Z @@ -631,7 +631,7 @@ explain select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 7 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 Using where; Using temporary select oref, a, a in (select min(ie) from t1 where oref=t2.oref group by grp) Z from t2; oref a Z ee NULL 0 @@ -718,7 +718,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using index 2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where Warnings: -Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t1`.`a`) and (not(<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t1` where ((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`)) having <is_not_null_test>(`test`.`t1`.`a`))))))) +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t1`.`a`) and (not(<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`t1`.`a` from `test`.`t1` where trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) having trigcond(<is_not_null_test>(`test`.`t1`.`a`)))))))) SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1)); a SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1 WHERE a > 4)); @@ -739,7 +739,7 @@ WHERE t3.name='xxx' AND t2.id=t3.id); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where 2 DEPENDENT SUBQUERY t2 eq_ref PRIMARY PRIMARY 4 func 1 Using where; Using index; Full scan on NULL key -2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 func 1 Using index condition(BKA); Using where; Full scan on NULL key; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan +2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 test.t2.id 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan SELECT * FROM t1 WHERE t1.id NOT IN (SELECT t2.id FROM t2,t3 WHERE t3.name='xxx' AND t2.id=t3.id); @@ -848,11 +848,16 @@ x ROW(11, 12) = (SELECT MAX(x), 22) ROW(11, 12) IN (SELECT MAX(x), 22) 1 0 0 2 0 0 11 0 0 -# 2nd and 3rd columns should be same for x == 11 only +# 2nd and 3rd columns should be same +EXPLAIN SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 +3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1; x ROW(11, 12) = (SELECT MAX(x), 12) ROW(11, 12) IN (SELECT MAX(x), 12) -1 0 1 -2 0 1 +1 0 0 +2 0 0 11 1 1 DROP TABLE t1; # both columns should be same @@ -978,7 +983,7 @@ i1 i2 # Baseline: SHOW STATUS LIKE '%Handler_read_rnd_next'; Variable_name Value -Handler_read_rnd_next 18 +Handler_read_rnd_next 17 INSERT INTO t1 VALUES (NULL, NULL); FLUSH STATUS; @@ -995,7 +1000,7 @@ i1 i2 # (read record from t1, but do not read from t2) SHOW STATUS LIKE '%Handler_read_rnd_next'; Variable_name Value -Handler_read_rnd_next 19 +Handler_read_rnd_next 18 set @@optimizer_switch=@save_optimizer_switch2; DROP TABLE t1,t2; End of 5.1 tests @@ -1030,11 +1035,10 @@ 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 t21 hash_ALL NULL #hash#$hj 4 test.t11.a 26 Using where; Using join buffer (flat, BNLH join) -1 PRIMARY t22 hash_ALL NULL #hash#$hj 4 test.t11.a 26 Using where; Using join buffer (incremental, BNLH join) -2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where -2 SUBQUERY t12 hash_ALL NULL #hash#$hj 4 test.t11.a 8 Using where; Using join buffer (flat, BNLH join) +1 PRIMARY t11 ALL NULL NULL NULL NULL 8 Using where; Using temporary; Using filesort; Start temporary +1 PRIMARY t12 hash_ALL NULL #hash#$hj 4 test.t11.a 8 Using where; Using join buffer (flat, BNLH join) +1 PRIMARY t22 hash_ALL NULL #hash#$hj 4 test.t11.a 26 Using where; End temporary; Using join buffer (incremental, BNLH join) +1 PRIMARY t21 hash_ALL NULL #hash#$hj 4 test.t11.a 26 Using where; Using join buffer (incremental, BNLH join) select t21.* from t21,t22 where t21.a = t22.a and t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a; a b c @@ -1047,9 +1051,8 @@ explain select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY X ALL NULL NULL NULL NULL 2 -2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where -2 DEPENDENT SUBQUERY subselect3 eq_ref unique_key unique_key 5 func 1 -3 SUBQUERY Z ALL NULL NULL NULL NULL 2 +2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where; Start temporary +2 DEPENDENT SUBQUERY Z hash_ALL NULL #hash#$hj 5 test.Y.a 2 Using where; End temporary; Using join buffer (flat, BNLH join) 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 NULL @@ -1119,8 +1122,7 @@ 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 -3 SUBQUERY t1 ALL NULL NULL NULL NULL 20 +1 PRIMARY t1 ALL NULL NULL NULL NULL 20 Using where; FirstMatch(<derived2>); Using join buffer (flat, BNL join) 2 DERIVED t0 ALL NULL NULL NULL NULL 11 drop table t0, t1; create table t0 (a int); @@ -1132,18 +1134,16 @@ create table t3 (a int); 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 -2 SUBQUERY t1 range kp1 kp1 5 NULL 48 Using where; Using index +1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where +1 PRIMARY t1 ref kp1 kp1 5 test.t3.a 1 Using index; FirstMatch(t3) create table t4 (pk int primary key); insert into t4 select a from t3; explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20 and t4.pk=t1.c); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t3 ALL NULL NULL NULL NULL 100 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 -2 SUBQUERY t1 range kp1 kp1 5 NULL 48 Using index condition; Using where; Rowid-ordered scan -2 SUBQUERY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index +1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where +1 PRIMARY t1 ref kp1 kp1 5 test.t3.a 1 Using where +1 PRIMARY t4 eq_ref PRIMARY PRIMARY 4 test.t1.c 1 Using index; FirstMatch(t3) drop table t1, t3, t4; create table t1 (a int) as select * from t0 where a < 5; set @save_max_heap_table_size=@@max_heap_table_size; @@ -1174,9 +1174,8 @@ 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 t3 ref a a 5 test.t2.a 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan -2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Start temporary +1 PRIMARY t3 ref a a 5 test.t2.a 1 End temporary; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan select * from t3 where a in (select a from t2); a filler 1 filler @@ -1222,47 +1221,44 @@ create table t3 (a int, b int, filler char(100), key(a)); 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 t3 ref a a 5 test.t2.a 10 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan -2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where; Start temporary +1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join) +1 PRIMARY t3 ref a a 5 test.t2.a 10 End temporary; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan 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) -2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where -2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where +2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join) explain select * from t2 where a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where -2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where +2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join) explain select straight_join * from t2 X, t2 Y where X.a in (select straight_join A.a from t1 A, t1 B); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY X ALL NULL NULL NULL NULL 10 Using where 1 PRIMARY Y ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) -2 SUBQUERY A ALL NULL NULL NULL NULL 10 -2 SUBQUERY B ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY A ALL NULL NULL NULL NULL 10 Using where +2 DEPENDENT SUBQUERY B ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join) create table t0 (a int, b int); insert into t0 values(1,1); explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 system NULL NULL NULL NULL 1 -1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10 -1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan -2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where +1 PRIMARY t2 ALL NULL NULL NULL NULL 10 Using where; Start temporary +1 PRIMARY t3 ref a a 5 test.t2.a 10 End temporary; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan create table t4 as select a as x, a as y from t1; explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 system NULL NULL NULL NULL 1 -1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 10 -1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan -2 SUBQUERY t4 ALL NULL NULL NULL NULL 10 Using where +1 PRIMARY t4 ALL NULL NULL NULL NULL 10 Using where; Start temporary +1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where; End temporary; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan drop table t0,t1,t2,t3,t4; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); @@ -1271,14 +1267,12 @@ insert into t1 select A.a, B.a, 'filler' from t0 A, t0 B; 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 -2 SUBQUERY t1 ref a a 10 const,test.t2.a 8 Using index +1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan +1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) explain select * from t2 where (b,a) in (select a,b from t1 where a=3); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where -1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 -2 SUBQUERY t1 ref a a 10 const,test.t2.a 8 Using index +1 PRIMARY t1 range a a 5 NULL 8 Using where; Using index; LooseScan +1 PRIMARY t2 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join) drop table t1,t2; create table t1 (a int, b int); insert into t1 select a,a from t0; @@ -1287,16 +1281,14 @@ insert into t2 select A.a + 10*B.a, A.a + 10*B.a from t0 A, t0 B; 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 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 100 +1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where; Start temporary +1 PRIMARY t2 hash_ALL NULL #hash#$hj 10 test.t1.a,test.t1.b 100 Using where; End temporary; Using join buffer (flat, BNLH join) set @save_optimizer_search_depth=@@optimizer_search_depth; set @@optimizer_search_depth=63; explain select * from t1 where (a,b) in (select a,b from t2); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 10 -1 PRIMARY subselect2 eq_ref unique_key unique_key 10 func 1 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 100 +1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where; Start temporary +1 PRIMARY t2 hash_ALL NULL #hash#$hj 10 test.t1.a,test.t1.b 100 Using where; End temporary; Using join buffer (flat, BNLH join) set @@optimizer_search_depth=@save_optimizer_search_depth; set @@optimizer_switch=@save_optimizer_switch; drop table t0, t1, t2; @@ -1306,9 +1298,8 @@ create table t1 as select * from t0; 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 +1 PRIMARY t0 ALL NULL NULL NULL NULL 2 Using where; Start temporary +1 PRIMARY t1 hash_ALL NULL #hash#$hj 3 test.t0.a 4 Using where; End temporary; Using join buffer (flat, BNLH join) select * from t0 where a in (select a from t1); a 10.24 @@ -1320,9 +1311,8 @@ create table t1 as select * from t0; insert into t1 select * from t0; explain select * from t0 where a in (select a from t1); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t0 ALL NULL NULL NULL NULL 2 -1 PRIMARY subselect2 eq_ref unique_key unique_key 4 func 1 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 +1 PRIMARY t0 ALL NULL NULL NULL NULL 2 Using where; Start temporary +1 PRIMARY t1 hash_ALL NULL #hash#$hj 4 test.t0.a 4 Using where; End temporary; Using join buffer (flat, BNLH join) select * from t0 where a in (select a from t1); a 2008-01-01 @@ -1335,11 +1325,10 @@ create table t2 as select a as a, a as b from t0 where a < 3; 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 -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) +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Start temporary +1 PRIMARY X hash_ALL NULL #hash#$hj 5 test.t1.a 6 Using where; Using join buffer (flat, BNLH join) +1 PRIMARY Y hash_ALL NULL #hash#$hj 5 test.t1.b 6 Using where; Using join buffer (incremental, BNLH join) +1 PRIMARY Z hash_ALL NULL #hash#$hj 5 test.t1.c 6 Using where; End temporary; Using join buffer (incremental, BNLH join) drop table t0,t1,t2; BUG#37842: Assertion in DsMrr_impl::dsmrr_init, at handler.cc:4307 @@ -1409,10 +1398,9 @@ 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 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); Key-ordered Rowid-ordered scan +1 PRIMARY cona ALL NULL NULL NULL NULL 2 100.00 Using where; Start temporary +1 PRIMARY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan +1 PRIMARY a eq_ref PRIMARY PRIMARY 4 test.c.idObj 1 100.00 Using index; End temporary Warnings: Note 1003 select `test`.`a`.`idIndividual` AS `idIndividual` from `test`.`t1` `a` semi join (`test`.`t3` `cona` join `test`.`t2` `c`) where ((`test`.`c`.`idContact` = `test`.`cona`.`idContact`) and (`test`.`a`.`idIndividual` = `test`.`c`.`idObj`) and (`test`.`cona`.`postalStripped` = 'T2H3B2')) drop table t1,t2,t3; diff --git a/mysql-test/r/subselect4.result b/mysql-test/r/subselect4.result index 686840630f1..87903694230 100644 --- a/mysql-test/r/subselect4.result +++ b/mysql-test/r/subselect4.result @@ -117,14 +117,14 @@ EXPLAIN SELECT * FROM t1 WHERE ( a, b ) NOT IN ( SELECT c, d FROM t2 ); id select_type table type possible_keys key key_len ref rows Extra x PRIMARY x x x x x x x x -x SUBQUERY x x x x x x x x +x DEPENDENT SUBQUERY x x x x x x x x SELECT * FROM t1 WHERE ( a, b ) NOT IN ( SELECT c, d FROM t2 ); a b EXPLAIN SELECT * FROM t1 WHERE ( a, b ) NOT IN ( SELECT c, d FROM t2 ) IS NULL; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where -2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where SELECT * FROM t1 WHERE ( a, b ) NOT IN ( SELECT c, d FROM t2 ) IS NULL; a b 1 NULL @@ -147,28 +147,28 @@ EXPLAIN SELECT * FROM t1 WHERE ( a, b ) NOT IN ( SELECT e, f FROM t3 ); id select_type table type possible_keys key key_len ref rows Extra x PRIMARY x x x x x x x x -x SUBQUERY x x x x x x x x +x DEPENDENT SUBQUERY x x x x x x x x SELECT * FROM t1 WHERE ( a, b ) NOT IN ( SELECT e, f FROM t3 ); a b EXPLAIN SELECT * FROM t2 WHERE ( c, d ) NOT IN ( SELECT a, b FROM t1 ); id select_type table type possible_keys key key_len ref rows Extra x PRIMARY x x x x x x x x -x SUBQUERY x x x x x x x x +x DEPENDENT SUBQUERY x x x x x x x x SELECT * FROM t2 WHERE ( c, d ) NOT IN ( SELECT a, b FROM t1 ); c d EXPLAIN SELECT * FROM t3 WHERE ( e, f ) NOT IN ( SELECT c, d FROM t2 ); id select_type table type possible_keys key key_len ref rows Extra x PRIMARY x x x x x x x x -x SUBQUERY x x x x x x x x +x DEPENDENT SUBQUERY x x x x x x x x SELECT * FROM t3 WHERE ( e, f ) NOT IN ( SELECT c, d FROM t2 ); e f EXPLAIN SELECT * FROM t2 WHERE ( c, d ) NOT IN ( SELECT e, f FROM t3 ); id select_type table type possible_keys key key_len ref rows Extra x PRIMARY x x x x x x x x -x SUBQUERY x x x x x x x x +x DEPENDENT SUBQUERY x x x x x x x x SELECT * FROM t2 WHERE ( c, d ) NOT IN ( SELECT e, f FROM t3 ); c d SELECT * FROM t1 WHERE ( a, b ) NOT IN @@ -342,7 +342,7 @@ INSERT INTO t3 VALUES ('E4','P4',40); INSERT INTO t3 VALUES ('E4','P5',80); SET @old_optimizer_switch = @@session.optimizer_switch; SET @old_join_cache_level = @@session.join_cache_level; -SET SESSION optimizer_switch = 'firstmatch=on,loosescan=on,materialization=on,semijoin=on'; +SET SESSION optimizer_switch = 'firstmatch=on,loosescan=on,materialization=on,in_to_exists=off,semijoin=on'; SET SESSION join_cache_level = 1; CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM); EXPLAIN SELECT EMPNAME @@ -565,7 +565,7 @@ INSERT INTO t3 VALUES ('E4','P4',40); INSERT INTO t3 VALUES ('E4','P5',80); SET @old_optimizer_switch = @@session.optimizer_switch; SET @old_join_cache_level = @@session.join_cache_level; -SET SESSION optimizer_switch = 'firstmatch=on,loosescan=on,materialization=on,semijoin=on'; +SET SESSION optimizer_switch = 'firstmatch=on,loosescan=on,materialization=on,in_to_exists=off,semijoin=on'; SET SESSION join_cache_level = 1; CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM); EXPLAIN SELECT EMPNAME @@ -726,7 +726,7 @@ INSERT INTO t1 VALUES ('28','6','m'),('29','4','c'); CREATE TABLE t2 (f11 varchar(1)) ; INSERT INTO t2 VALUES ('f'),('d'); SET @old_optimizer_switch = @@session.optimizer_switch; -SET SESSION optimizer_switch = 'materialization=on'; +SET SESSION optimizer_switch = 'materialization=on,in_to_exists=off,'; EXPLAIN SELECT * FROM t1 WHERE f3 = ( @@ -735,7 +735,7 @@ WHERE ( t1.f10 ) IN ( SELECT f11 FROM t2 GROUP BY f11 )); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where -3 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort +3 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using temporary SELECT * FROM t1 WHERE f3 = ( SELECT t1.f3 FROM t1 @@ -749,7 +749,7 @@ WHERE ( f10, f10 ) IN ( SELECT f11, f11 FROM t2 GROUP BY f11 )); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where -3 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort +3 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using temporary SELECT * FROM t1 WHERE f3 = ( SELECT f3 FROM t1 @@ -763,7 +763,7 @@ drop table t1,t2; CREATE TABLE t1 (f1 int, f2 int); CREATE TABLE t2 (f3 int, f4 int not null, PRIMARY KEY (f3)); set @save_optimizer_switch=@@optimizer_switch; -SET @@optimizer_switch = 'materialization=on,semijoin=off'; +SET @@optimizer_switch = 'materialization=on,in_to_exists=off,semijoin=off'; EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4) FROM t2); id select_type table type possible_keys key key_len ref rows Extra @@ -851,10 +851,10 @@ EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) 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 -2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2); f1 f2 -SET @@optimizer_switch = 'materialization=off,semijoin=off'; +SET @@optimizer_switch = 'materialization=off,in_to_exists=on,semijoin=off'; EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4) FROM t2); id select_type table type possible_keys key key_len ref rows Extra @@ -949,25 +949,25 @@ INSERT INTO t1 VALUES (1, 2); INSERT INTO t1 VALUES (3, 4); INSERT INTO t2 VALUES (5, 6); INSERT INTO t2 VALUES (7, 8); -SET @@optimizer_switch = 'materialization=on,semijoin=off'; +SET @@optimizer_switch = 'materialization=on,in_to_exists=off,semijoin=off'; EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4) FROM t2 WHERE f3 > 10); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 Using index condition; Rowid-ordered scan SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4) FROM t2 WHERE f3 > 10); f1 f2 EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3+f4, min(f4) FROM t2 WHERE f3 > 10); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 Using index condition; Rowid-ordered scan SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3+f4, min(f4) FROM t2 WHERE f3 > 10); f1 f2 EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4)+max(f4) FROM t2 WHERE f3 > 10); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 Using index condition; Rowid-ordered scan SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4)+max(f4) FROM t2 WHERE f3 > 10); f1 f2 @@ -982,14 +982,14 @@ NULL EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, count(f4) FROM t2 WHERE f3 > 10); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 Using index condition; Rowid-ordered scan SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, count(f4) FROM t2 WHERE f3 > 10); f1 f2 EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, f3 + count(f4) FROM t2 WHERE f3 > 10); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 Using index condition; Rowid-ordered scan SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, f3 + count(f4) FROM t2 WHERE f3 > 10); f1 f2 @@ -1036,29 +1036,29 @@ NULL EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2 WHERE f3 > 10); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where -2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2 WHERE f3 > 10); f1 f2 -SET @@optimizer_switch = 'materialization=off,semijoin=off'; +SET @@optimizer_switch = 'materialization=off,in_to_exists=on,semijoin=off'; EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4) FROM t2 WHERE f3 > 10); 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 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 2 DEPENDENT SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 Using index condition; Rowid-ordered scan SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4) FROM t2 WHERE f3 > 10); f1 f2 EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3+f4, min(f4) FROM t2 WHERE f3 > 10); 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 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 2 DEPENDENT SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 Using index condition; Rowid-ordered scan SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3+f4, min(f4) FROM t2 WHERE f3 > 10); f1 f2 EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4)+max(f4) FROM t2 WHERE f3 > 10); 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 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 2 DEPENDENT SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 Using index condition; Rowid-ordered scan SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4)+max(f4) FROM t2 WHERE f3 > 10); f1 f2 @@ -1073,14 +1073,14 @@ NULL EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, count(f4) FROM t2 WHERE f3 > 10); 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 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 2 DEPENDENT SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 Using index condition; Rowid-ordered scan SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, count(f4) FROM t2 WHERE f3 > 10); f1 f2 EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, f3 + count(f4) FROM t2 WHERE f3 > 10); 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 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 2 DEPENDENT SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 1 Using index condition; Rowid-ordered scan SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, f3 + count(f4) FROM t2 WHERE f3 > 10); f1 f2 @@ -1127,7 +1127,7 @@ NULL EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2 WHERE f3 > 10); 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 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2 WHERE f3 > 10); f1 f2 @@ -1154,20 +1154,21 @@ PRIMARY KEY (pk), KEY f2 (f2)); INSERT INTO t2 VALUES (1,7,'p'); set @save_optimizer_switch=@@optimizer_switch; -set @@optimizer_switch='materialization=off,semijoin=off'; +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=off'; EXPLAIN SELECT t1.f3, MAX(t1.f2) FROM t1, t2 WHERE (t2.pk = t1.pk) AND t2.pk IN (SELECT f2 FROM t1); 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 +1 PRIMARY t2 system PRIMARY NULL NULL NULL 1 +1 PRIMARY t1 const PRIMARY PRIMARY 4 const 1 2 DEPENDENT SUBQUERY t1 index_subquery f2 f2 4 func 2 Using index SELECT t1.f3, MAX(t1.f2) FROM t1, t2 WHERE (t2.pk = t1.pk) AND t2.pk IN (SELECT f2 FROM t1); f3 MAX(t1.f2) NULL NULL -set @@optimizer_switch='materialization=on,semijoin=off'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; EXPLAIN SELECT t1.f3, MAX(t1.f2) FROM t1, t2 @@ -1185,3 +1186,560 @@ TODO: add a test case for semijoin when the wrong result is fixed set @@optimizer_switch='materialization=off,semijoin=on'; set @@optimizer_switch=@save_optimizer_switch; drop table t1, t2; +# +# LP BUG#641203 Query returns rows where no result is expected (impossible WHERE) +# +CREATE TABLE t1 (c1 varchar(1) DEFAULT NULL); +CREATE TABLE t2 (c1 varchar(1) DEFAULT NULL); +INSERT INTO t2 VALUES ('k'), ('d'); +CREATE TABLE t3 (c1 varchar(1) DEFAULT NULL); +INSERT INTO t3 VALUES ('a'), ('b'), ('c'); +CREATE TABLE t4 (c1 varchar(1) primary key); +INSERT INTO t4 VALUES ('k'), ('d'); +EXPLAIN +SELECT * FROM t1 RIGHT JOIN t2 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 system NULL NULL NULL NULL 0 const row not found +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where +SELECT * FROM t1 RIGHT JOIN t2 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2); +c1 c1 +EXPLAIN +SELECT * FROM t2 LEFT JOIN t1 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 system NULL NULL NULL NULL 0 const row not found +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where +SELECT * FROM t2 LEFT JOIN t1 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2); +c1 c1 +EXPLAIN +SELECT * FROM (t2 LEFT JOIN t1 ON t1.c1) LEFT JOIN t3 on t3.c1 WHERE 's' IN (SELECT c1 FROM t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 system NULL NULL NULL NULL 0 const row not found +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where +SELECT * FROM (t2 LEFT JOIN t1 ON t1.c1) LEFT JOIN t3 on t3.c1 WHERE 's' IN (SELECT c1 FROM t2); +c1 c1 c1 +EXPLAIN +SELECT * FROM t4 LEFT JOIN t2 ON t4.c1 WHERE 's' IN (SELECT c1 FROM t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t4 index NULL PRIMARY 3 NULL 2 Using index +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where +SELECT * FROM t4 LEFT JOIN t2 ON t4.c1 WHERE 's' IN (SELECT c1 FROM t2); +c1 c1 +drop table t1, t2, t3, t4; +# +# LP BUG#675981 Assertion `cache != __null' failed in sub_select_cache() +# on EXPLAIN +# +CREATE TABLE t1 (f1 int,f2 int) ; +INSERT IGNORE INTO t1 VALUES ('2','5'),('2',NULL); +CREATE TABLE t2 (f1 int, f5 int) ; +INSERT IGNORE INTO t2 VALUES (1,0); +CREATE TABLE t3 (f4 int) ; +INSERT IGNORE INTO t3 VALUES (0),(0); +set @@optimizer_switch='in_to_exists=on,materialization=off,semijoin=off'; +EXPLAIN +SELECT * FROM t2 +WHERE f1 IN (SELECT t1.f2 FROM t1 JOIN t3 ON t3.f4); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 system NULL NULL NULL NULL 1 +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) +drop table t1, t2, t3; +# +# LP BUG#680005 Second assertion `cache != __null' failed in +# sub_select_cache() on EXPLAIN +# +CREATE TABLE t1 (f1 int,f2 int,f4 int,f6 int,KEY (f4)) ; +INSERT IGNORE INTO t1 VALUES +('1','5','1','0'),('2','1','1','0'),('2','2','2','0'),('0',NULL,'0','0'), +('2','1','2','0'),('2','0','0','0'),('2','2','2','0'),('2','8','2','0'), +('2','7','2','0'),('2','5','2','0'),('2',NULL,'1','0'); +CREATE TABLE t2 (f3 int) ; +INSERT IGNORE INTO t2 VALUES ('7'); +CREATE TABLE t3 (f3 int) ; +INSERT IGNORE INTO t3 VALUES ('2'); +EXPLAIN +SELECT t1.f4 +FROM t2 JOIN t1 ON t1.f6 +WHERE +( t1.f2 ) IN (SELECT SUBQUERY2_t1.f3 +FROM t3 AS SUBQUERY2_t1 +JOIN +(t1 AS SUBQUERY2_t2 +JOIN +t1 AS SUBQUERY2_t3 ON SUBQUERY2_t3.f1) +ON SUBQUERY2_t3.f2) +GROUP BY t1.f4 ORDER BY t1.f1 LIMIT 10; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 system NULL NULL NULL NULL 1 Using temporary; Using filesort +1 PRIMARY t1 index NULL f4 5 NULL 11 Using where +2 DEPENDENT SUBQUERY SUBQUERY2_t1 system NULL NULL NULL NULL 1 +2 DEPENDENT SUBQUERY SUBQUERY2_t2 index NULL f4 5 NULL 11 Using index +2 DEPENDENT SUBQUERY SUBQUERY2_t3 ALL NULL NULL NULL NULL 11 Using where; Using join buffer (flat, BNL join) +drop table t1, t2, t3; +# +# LP BUG#680038 bool close_thread_table(THD*, TABLE**): +# Assertion `table->key_read == 0' failed in EXPLAIN +# +CREATE TABLE t1 (f1 int,f3 int,f4 int) ; +INSERT IGNORE INTO t1 VALUES (NULL,1,0); +CREATE TABLE t2 (f2 int,f4 int,f5 int) ; +INSERT IGNORE INTO t2 VALUES (8,0,0),(5,0,0); +CREATE TABLE t3 (f4 int,KEY (f4)) ; +INSERT IGNORE INTO t3 VALUES (0),(0); +set @@optimizer_switch='semijoin=off'; +EXPLAIN +SELECT * FROM t1 WHERE +(SELECT f2 FROM t2 +WHERE f4 <= ALL +(SELECT SQ1_t1.f4 +FROM t3 AS SQ1_t1 JOIN t3 AS SQ1_t3 ON SQ1_t3.f4 +GROUP BY SQ1_t1.f4)); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 system NULL NULL NULL NULL 1 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where +3 SUBQUERY SQ1_t1 index NULL f4 5 NULL 2 Using index; Using temporary +3 SUBQUERY SQ1_t3 index NULL f4 5 NULL 2 Using where; Using index; Using join buffer (flat, BNL join) +drop table t1, t2, t3; +# +# BUG#52317: Assertion failing in Field_varstring::store() +# at field.cc:6833 +# +CREATE TABLE t1 (i INTEGER); +INSERT INTO t1 VALUES (1); +CREATE TABLE t2 (i INTEGER, KEY k(i)); +INSERT INTO t2 VALUES (1), (2); +EXPLAIN +SELECT i FROM t1 WHERE (1) NOT IN (SELECT i FROM t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 system NULL NULL NULL NULL 1 +2 DEPENDENT SUBQUERY t2 ref_or_null k k 5 const 2 Using where; Using index +DROP TABLE t2; +DROP TABLE t1; +# +# LP BUG#680846: Crash in clear_tables() with subqueries +# +CREATE TABLE t1 (f3 int) ; +INSERT IGNORE INTO t1 VALUES (0),(0); +CREATE TABLE t2 (f1 int,f3 int,f4 varchar(32)) ; +INSERT IGNORE INTO t2 VALUES (1,0,'f'); +EXPLAIN +SELECT COUNT(t2.f3), +(SELECT COUNT(f3) FROM t1 WHERE t2.f1) AS f9 +FROM t2 JOIN t1 ON t1.f3 +WHERE ('v') IN (SELECT f4 FROM t2) +GROUP BY f9; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 system NULL NULL NULL NULL 1 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where +3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 +SELECT COUNT(t2.f3), +(SELECT COUNT(f3) FROM t1 WHERE t2.f1) AS f9 +FROM t2 JOIN t1 ON t1.f3 +WHERE ('v') IN (SELECT f4 FROM t2) +GROUP BY f9; +COUNT(t2.f3) f9 +EXPLAIN +SELECT COUNT(t2.f3), +(SELECT COUNT(f3) FROM t1 WHERE t2.f1) AS f9 +FROM t2 JOIN t1 ON t1.f3 +WHERE ('v') IN (SELECT f4 FROM t2) +ORDER BY f9; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 system NULL NULL NULL NULL 1 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where +3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 +SELECT COUNT(t2.f3), +(SELECT COUNT(f3) FROM t1 WHERE t2.f1) AS f9 +FROM t2 JOIN t1 ON t1.f3 +WHERE ('v') IN (SELECT f4 FROM t2) +ORDER BY f9; +COUNT(t2.f3) f9 +0 2 +EXPLAIN +SELECT COUNT(t2.f3), +(SELECT t2.f1 FROM t1 limit 1) AS f9 +FROM t2 JOIN t1 +WHERE ('v') IN (SELECT f4 FROM t2) +GROUP BY f9; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 system NULL NULL NULL NULL 1 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 +3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 +SELECT COUNT(t2.f3), +(SELECT t2.f1 FROM t1 limit 1) AS f9 +FROM t2 JOIN t1 +WHERE ('v') IN (SELECT f4 FROM t2) +GROUP BY f9; +COUNT(t2.f3) f9 +EXPLAIN +SELECT COUNT(t2.f3), +(SELECT t2.f1 FROM t1 limit 1) AS f9 +FROM t2 JOIN t1 +WHERE ('v') IN (SELECT f4 FROM t2) +ORDER BY f9; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 system NULL NULL NULL NULL 1 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 +3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 +SELECT COUNT(t2.f3), +(SELECT t2.f1 FROM t1 limit 1) AS f9 +FROM t2 JOIN t1 +WHERE ('v') IN (SELECT f4 FROM t2) +ORDER BY f9; +COUNT(t2.f3) f9 +0 NULL +drop table t1,t2; +# +# LP BUG#682683 Crash in create_tmp_table called from +# JOIN::init_execution +# +CREATE TABLE t2 (f1 int) ; +INSERT INTO t2 VALUES (1),(2); +CREATE TABLE t1 (f1 int) ; +EXPLAIN +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 GROUP BY field1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 +2 SUBQUERY t1 system NULL NULL NULL NULL 0 const row not found +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 GROUP BY field1; +field1 +NULL +EXPLAIN +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 ORDER BY field1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 +2 SUBQUERY t1 system NULL NULL NULL NULL 0 const row not found +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 ORDER BY field1; +field1 +NULL +NULL +INSERT INTO t1 VALUES (1),(2); +EXPLAIN +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 GROUP BY field1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 +2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 GROUP BY field1; +ERROR 21000: Subquery returns more than 1 row +EXPLAIN +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 ORDER BY field1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 +2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 ORDER BY field1; +ERROR 21000: Subquery returns more than 1 row +drop table t1,t2; +# +# LP BUG#680943 Assertion `!table || (!table->read_set || +# bitmap_is_set(table->read_set, field_index))' failed with subquery +# +CREATE TABLE t1 (f1 int,f3 int) ; +INSERT IGNORE INTO t1 VALUES ('6','0'),('4','0'); +CREATE TABLE t2 (f1 int,f2 int,f3 int) ; +INSERT IGNORE INTO t2 VALUES ('6','0','0'),('2','0','0'); +SELECT f2 +FROM (SELECT * FROM t2) AS alias1 +WHERE (SELECT SQ2_t2.f1 +FROM t1 JOIN t1 AS SQ2_t2 ON SQ2_t2.f3 +WHERE SQ2_t2.f3 AND alias1.f1) +ORDER BY f3 ; +f2 +drop table t1,t2; +# +# LP BUG#715062: Wrong result with VIEW + UNION + subquery in maria-5.3-mwl89 +# +create table t1 (f1 int); +create table t2 (f2 int); +create table t3 (f3 int); +insert into t1 values (2); +insert into t2 values (2); +insert into t3 values (7); +CREATE VIEW v1 AS SELECT 2 UNION SELECT 2 ; +CREATE VIEW v2 AS SELECT * from t1 UNION SELECT * from t2 ; +set @save_optimizer_switch=@@optimizer_switch; +SET @@optimizer_switch = 'in_to_exists=off,semijoin=off,materialization=on'; +EXPLAIN +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN ( SELECT * FROM v1 ); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +3 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used +4 UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union3,4> ALL NULL NULL NULL NULL NULL +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN ( SELECT * FROM v1 ); +bug +EXPLAIN +SELECT ( 5 ) IN ( SELECT * FROM v1 ); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +3 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used +4 UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union3,4> ALL NULL NULL NULL NULL NULL +SELECT ( 5 ) IN ( SELECT * FROM v1 ); +( 5 ) IN ( SELECT * FROM v1 ) +0 +EXPLAIN +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN (SELECT * FROM v2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +3 DERIVED t1 system NULL NULL NULL NULL 1 +4 UNION t2 system NULL NULL NULL NULL 1 +NULL UNION RESULT <union3,4> ALL NULL NULL NULL NULL NULL +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN (SELECT * FROM v2); +bug +EXPLAIN +SELECT 'bug' FROM t3 WHERE ( 5 ) IN (SELECT * FROM v2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t3 system NULL NULL NULL NULL 1 +2 SUBQUERY <derived3> system NULL NULL NULL NULL 1 +3 DERIVED t1 system NULL NULL NULL NULL 1 +4 UNION t2 system NULL NULL NULL NULL 1 +NULL UNION RESULT <union3,4> ALL NULL NULL NULL NULL NULL +SELECT 'bug' FROM t3 WHERE ( 5 ) IN (SELECT * FROM v2); +bug +EXPLAIN +SELECT ( 5 ) IN ( SELECT * FROM v2 ); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +3 DERIVED t1 system NULL NULL NULL NULL 1 +4 UNION t2 system NULL NULL NULL NULL 1 +NULL UNION RESULT <union3,4> ALL NULL NULL NULL NULL NULL +SELECT ( 5 ) IN ( SELECT * FROM v2 ); +( 5 ) IN ( SELECT * FROM v2 ) +0 +SET @@optimizer_switch = 'in_to_exists=on,semijoin=off,materialization=off'; +EXPLAIN +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN ( SELECT * FROM v1 ); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +3 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used +4 UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union3,4> ALL NULL NULL NULL NULL NULL +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN ( SELECT * FROM v1 ); +bug +EXPLAIN +SELECT ( 5 ) IN ( SELECT * FROM v1 ); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +3 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used +4 UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union3,4> ALL NULL NULL NULL NULL NULL +SELECT ( 5 ) IN ( SELECT * FROM v1 ); +( 5 ) IN ( SELECT * FROM v1 ) +0 +EXPLAIN +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN (SELECT * FROM v2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +3 DERIVED t1 system NULL NULL NULL NULL 1 +4 UNION t2 system NULL NULL NULL NULL 1 +NULL UNION RESULT <union3,4> ALL NULL NULL NULL NULL NULL +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN (SELECT * FROM v2); +bug +EXPLAIN +SELECT 'bug' FROM t3 WHERE ( 5 ) IN (SELECT * FROM v2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t3 system NULL NULL NULL NULL 1 +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +3 DERIVED t1 system NULL NULL NULL NULL 1 +4 UNION t2 system NULL NULL NULL NULL 1 +NULL UNION RESULT <union3,4> ALL NULL NULL NULL NULL NULL +SELECT 'bug' FROM t3 WHERE ( 5 ) IN (SELECT * FROM v2); +bug +EXPLAIN +SELECT ( 5 ) IN ( SELECT * FROM v2 ); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +3 DERIVED t1 system NULL NULL NULL NULL 1 +4 UNION t2 system NULL NULL NULL NULL 1 +NULL UNION RESULT <union3,4> ALL NULL NULL NULL NULL NULL +SELECT ( 5 ) IN ( SELECT * FROM v2 ); +( 5 ) IN ( SELECT * FROM v2 ) +0 +set @@optimizer_switch=@save_optimizer_switch; +drop table t1,t2,t3; +drop view v1,v2; +# +# LP BUG#715069 Wrong result with GROUP BY inside subquery and materialization=off +# +CREATE TABLE t0 ( f1 int(11), f2 int(11), f10 varchar(1), PRIMARY KEY (f1)) ; +INSERT INTO t0 VALUES (8,8,'u'),(10,5,'o'); +CREATE TABLE t1 (f1a int, f2a int not null, f3a varchar(3) not null, PRIMARY KEY (f1a)) ; +INSERT INTO t1 VALUES +(8,8,'a1a'), +(10,5,'b1b'); +CREATE TABLE t2 (f1b int, f2b int not null, f3b varchar(3) not null, PRIMARY KEY (f1b)) ; +INSERT INTO t2 VALUES +(10,5,'d1d'); +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off'; +EXPLAIN +SELECT alias2.f1 , alias2.f2 +FROM t0 AS alias1 +RIGHT JOIN t0 AS alias2 ON alias2.f10 +WHERE ( alias2.f1 , alias2.f2 ) IN ( SELECT f2 , f1 FROM t0 GROUP BY f2 , f1 ); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY alias2 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY alias1 index NULL PRIMARY 4 NULL 2 Using where; Using index +2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 2 +SELECT alias2.f1 , alias2.f2 +FROM t0 AS alias1 +RIGHT JOIN t0 AS alias2 ON alias2.f10 +WHERE ( alias2.f1 , alias2.f2 ) IN ( SELECT f2 , f1 FROM t0 GROUP BY f2 , f1 ); +f1 f2 +8 8 +EXPLAIN +SELECT * FROM t2 WHERE (f1b, f2b) IN (SELECT f1a, f2a FROM t1 GROUP BY f1a, f2a); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 system NULL NULL NULL NULL 1 +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 +SELECT * FROM t2 WHERE (f1b, f2b) IN (SELECT f1a, f2a FROM t1 GROUP BY f1a, f2a); +f1b f2b f3b +10 5 d1d +EXPLAIN +SELECT * FROM t2 WHERE (f1b) IN (SELECT f1a FROM t1 GROUP BY f1a, f2a); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 system NULL NULL NULL NULL 1 +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 +SELECT * FROM t2 WHERE (f1b) IN (SELECT f1a FROM t1 GROUP BY f1a, f2a); +f1b f2b f3b +10 5 d1d +SET @@optimizer_switch = 'materialization=on'; +EXPLAIN +SELECT alias2.f1 , alias2.f2 +FROM t0 AS alias1 +RIGHT JOIN t0 AS alias2 ON alias2.f10 +WHERE ( alias2.f1 , alias2.f2 ) IN ( SELECT f2 , f1 FROM t0 GROUP BY f2 , f1 ); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY alias2 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY alias1 index NULL PRIMARY 4 NULL 2 Using where; Using index +2 SUBQUERY t0 ALL NULL NULL NULL NULL 2 +SELECT alias2.f1 , alias2.f2 +FROM t0 AS alias1 +RIGHT JOIN t0 AS alias2 ON alias2.f10 +WHERE ( alias2.f1 , alias2.f2 ) IN ( SELECT f2 , f1 FROM t0 GROUP BY f2 , f1 ); +f1 f2 +8 8 +EXPLAIN +SELECT * FROM t2 WHERE (f1b, f2b) IN (SELECT f1a, f2a FROM t1 GROUP BY f1a, f2a); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 system NULL NULL NULL NULL 1 +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 +SELECT * FROM t2 WHERE (f1b, f2b) IN (SELECT f1a, f2a FROM t1 GROUP BY f1a, f2a); +f1b f2b f3b +10 5 d1d +EXPLAIN +SELECT * FROM t2 WHERE (f1b) IN (SELECT f1a FROM t1 GROUP BY f1a, f2a); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 system NULL NULL NULL NULL 1 +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 +SELECT * FROM t2 WHERE (f1b) IN (SELECT f1a FROM t1 GROUP BY f1a, f2a); +f1b f2b f3b +10 5 d1d +set @@optimizer_switch=@save_optimizer_switch; +drop table t0,t1,t2; +# +# LP BUG#718593 Crash in substitute_for_best_equal_field -> eliminate_item_equal -> +# Item_field::find_item_equal -> Item_equal::contains +# +set @save_optimizer_switch=@@optimizer_switch; +SET @@optimizer_switch = 'semijoin=off'; +CREATE TABLE t1 ( f3 int(11), f10 varchar(1), f11 varchar(1)) ; +INSERT IGNORE INTO t1 VALUES (6,'f','f'),(2,'d','d'); +CREATE TABLE t2 ( f12 int(11), f13 int(11)) ; +insert into t2 values (1,2), (3,4); +EXPLAIN +SELECT * FROM t2 +WHERE ( f12 ) IN ( +SELECT alias2.f3 +FROM t1 AS alias1 JOIN t1 AS alias2 ON alias2.f10 = alias1.f11 +WHERE alias1.f11 OR alias1.f3 = 50 AND alias1.f10 +); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY alias1 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY alias2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) +SELECT * FROM t2 +WHERE ( f12 ) IN ( +SELECT alias2.f3 +FROM t1 AS alias1 JOIN t1 AS alias2 ON alias2.f10 = alias1.f11 +WHERE alias1.f11 OR alias1.f3 = 50 AND alias1.f10 +); +f12 f13 +EXPLAIN +SELECT * FROM t2 +WHERE ( f12 ) IN ( +SELECT alias2.f3 +FROM t1 AS alias1, t1 AS alias2 +WHERE (alias2.f10 = alias1.f11) AND (alias1.f11 OR alias1.f3 = 50 AND alias1.f10)); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY alias1 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY alias2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) +SELECT * FROM t2 +WHERE ( f12 ) IN ( +SELECT alias2.f3 +FROM t1 AS alias1, t1 AS alias2 +WHERE (alias2.f10 = alias1.f11) AND (alias1.f11 OR alias1.f3 = 50 AND alias1.f10)); +f12 f13 +set @@optimizer_switch=@save_optimizer_switch; +drop table t1, t2; +# +# LP BUG#715759 Wrong result with in_to_exists=on in maria-5.3-mwl89 +# +set @save_optimizer_switch=@@optimizer_switch; +CREATE TABLE t1 (a1 int, a2 int) ; +INSERT INTO t1 VALUES (1, 2); +INSERT INTO t1 VALUES (3, 4); +CREATE TABLE t2 (b1 int, b2 int) ; +INSERT INTO t2 VALUES (1, 2); +SET @@optimizer_switch = 'in_to_exists=on,materialization=off,semijoin=off'; +EXPLAIN SELECT * FROM t1 WHERE a1 IN (SELECT b1 FROM t2 WHERE b1 = b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +SELECT * FROM t1 WHERE a1 IN (SELECT b1 FROM t2 WHERE b1 = b2); +a1 a2 +set @@optimizer_switch=@save_optimizer_switch; +drop table t1, t2; +# +# LP BUG#772309 join_tab_cmp_straight(): Assertion `!jt2->emb_sj_nest' failed in maria-5.3-mwl89 with semijoin +# +CREATE TABLE t1 ( f2 int) ; +INSERT INTO t1 VALUES (0),(0); +CREATE TABLE t2 ( f1 int NOT NULL ) ; +INSERT INTO t2 VALUES (0),(0); +CREATE TABLE t3 ( f1 int NOT NULL , f2 int) ; +INSERT INTO t3 VALUES (0,0), (0,0); +EXPLAIN SELECT STRAIGHT_JOIN ( +SELECT f2 FROM t1 WHERE ( f2 ) IN ( SELECT t3.f2 FROM t3 JOIN t2 ON t2.f1 = 1 ) +); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where +3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 Using where +3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) +SELECT STRAIGHT_JOIN ( +SELECT f2 FROM t1 WHERE ( f2 ) IN ( SELECT t3.f2 FROM t3 JOIN t2 ON t2.f1 = 1 ) +); +( +SELECT f2 FROM t1 WHERE ( f2 ) IN ( SELECT t3.f2 FROM t3 JOIN t2 ON t2.f1 = 1 ) +) +NULL +drop table t1, t2, t3; diff --git a/mysql-test/r/subselect_cache.result b/mysql-test/r/subselect_cache.result index 7b9dc3c943f..f80b9882c60 100644 --- a/mysql-test/r/subselect_cache.result +++ b/mysql-test/r/subselect_cache.result @@ -456,8 +456,8 @@ Handler_read_first 0 Handler_read_key 7 Handler_read_next 0 Handler_read_prev 0 -Handler_read_rnd 0 -Handler_read_rnd_next 31 +Handler_read_rnd 10 +Handler_read_rnd_next 42 set optimizer_switch='subquery_cache=off'; flush status; select a from t1 ORDER BY (select d from t2 where b=c); @@ -482,8 +482,8 @@ Handler_read_first 0 Handler_read_key 0 Handler_read_next 0 Handler_read_prev 0 -Handler_read_rnd 0 -Handler_read_rnd_next 61 +Handler_read_rnd 10 +Handler_read_rnd_next 72 set optimizer_switch='subquery_cache=on'; #single value subquery test (distinct ORDER BY) flush status; @@ -1336,11 +1336,11 @@ Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 -Handler_read_key 11 +Handler_read_key 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_rnd 0 -Handler_read_rnd_next 145 +Handler_read_rnd_next 188 set optimizer_switch='subquery_cache=on'; flush status; select a, b , exists (select * from t2 where b=d) as SUBSE, b in (select d from t2) as SUBSI, (select d from t2 where b=c) SUBSR from t1; @@ -1364,11 +1364,11 @@ Subquery_cache_miss 18 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 -Handler_read_key 32 +Handler_read_key 27 Handler_read_next 0 Handler_read_prev 0 Handler_read_rnd 0 -Handler_read_rnd_next 84 +Handler_read_rnd_next 102 #several subqueries (several levels) set optimizer_switch='subquery_cache=off'; flush status; @@ -3195,7 +3195,7 @@ 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 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00 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`,<exists>(select 1 from `test`.`t2` where (<cache>(`test`.`t1`.`a`) = `test`.`t2`.`b`)))) +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`t2`.`b` from `test`.`t2` where (<cache>(`test`.`t1`.`a`) = `test`.`t2`.`b`)))) drop table t1,t2; set @@optimizer_switch= default; # LP BUG#615760 (part 2: incorrect heap table index flags) diff --git a/mysql-test/r/subselect_mat.result b/mysql-test/r/subselect_mat.result index 7b7c2fe3a59..f475b251235 100644 --- a/mysql-test/r/subselect_mat.result +++ b/mysql-test/r/subselect_mat.result @@ -30,7 +30,7 @@ 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'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; /****************************************************************************** * Simple tests. ******************************************************************************/ @@ -50,7 +50,7 @@ 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 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary 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`)))))) select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); @@ -61,7 +61,7 @@ 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 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary 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`)))))) select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); @@ -72,7 +72,7 @@ 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 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary; Using filesort +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary 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)`)))))) select * from t1 where (a1, a2) in (select b1, min(b2) from t2 where b1 > '0' group by b1); @@ -176,33 +176,33 @@ a1 a2 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 @@optimizer_switch='default,semijoin=off'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on'; 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'; +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on'; execute st1; a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 -set @@optimizer_switch='default,semijoin=off'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on'; execute st1; a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 -set @@optimizer_switch='default,materialization=off'; +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on'; 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'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; execute st1; a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 -set @@optimizer_switch='default,materialization=off'; +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on'; execute st1; a1 a2 1 - 01 2 - 01 1 - 02 2 - 02 -set @@optimizer_switch='default,semijoin=off'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; 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 @@ -342,7 +342,7 @@ 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 `test`.`t3a`.`c2` 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`))))))) select * from t1 where (a1, a2) in (select b1, b2 from t2 where b2 in (select c2 from t3 t3a where c1 = a1) or @@ -369,7 +369,7 @@ 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 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 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; Using temporary 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 @@ -452,7 +452,7 @@ 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`.`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`))))) +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 `test`.`t1`.`a1` from `test`.`t1` where ((`test`.`t1`.`a1` > '0') and (<cache>(`test`.`t3`.`c1`) = `test`.`t1`.`a1`)) union select `test`.`t2`.`b1` 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 @@ -476,14 +476,14 @@ 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 `test`.`t3a`.`c2` 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`)))))) 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'))))) +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') or isnull('1 - 01')) and ((<cache>(`test`.`t1`.`a2`) = '2 - 01') or isnull('2 - 01')) and <is_not_null_test>('1 - 01') and <is_not_null_test>('2 - 01'))))) select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01'); a1 a2 1 - 01 2 - 01 @@ -493,7 +493,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY 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'))))) +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') or isnull('1 - 01')) and ((<cache>(`test`.`t1`.`a2`) = '2 - 01') or isnull('2 - 01')) and <is_not_null_test>('1 - 01') and <is_not_null_test>('2 - 01'))))) select * from t1 where (a1, a2) in (select '1 - 01', '2 - 01' from dual); a1 a2 1 - 01 2 - 01 @@ -549,7 +549,7 @@ 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 @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; set @prefix_len = 6; set @blob_len = 16; set @suffix_len = @blob_len - @prefix_len; @@ -583,7 +583,7 @@ 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 DEPENDENT 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`,<exists>(select 1 from `test`.`t2_16` where ((`test`.`t2_16`.`b1` > '0') and (<cache>(`test`.`t1_16`.`a1`) = `test`.`t2_16`.`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`,<exists>(select `test`.`t2_16`.`b1` from `test`.`t2_16` where ((`test`.`t2_16`.`b1` > '0') and (<cache>(`test`.`t1_16`.`a1`) = `test`.`t2_16`.`b1`))))) select left(a1,7), left(a2,7) from t1_16 where a1 in (select b1 from t2_16 where b1 > '0'); @@ -662,7 +662,7 @@ 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 left(`test`.`t1_16`.`a1`,8) 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)))))) drop table t1_16, t2_16, t3_16; set @blob_len = 512; set @suffix_len = @blob_len - @prefix_len; @@ -696,7 +696,7 @@ 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 DEPENDENT 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`,<exists>(select 1 from `test`.`t2_512` where ((`test`.`t2_512`.`b1` > '0') and (<cache>(`test`.`t1_512`.`a1`) = `test`.`t2_512`.`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`,<exists>(select `test`.`t2_512`.`b1` from `test`.`t2_512` where ((`test`.`t2_512`.`b1` > '0') and (<cache>(`test`.`t1_512`.`a1`) = `test`.`t2_512`.`b1`))))) select left(a1,7), left(a2,7) from t1_512 where a1 in (select b1 from t2_512 where b1 > '0'); @@ -789,7 +789,7 @@ 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 DEPENDENT 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` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,<exists>(select 1 from `test`.`t2_1024` where ((`test`.`t2_1024`.`b1` > '0') and (<cache>(`test`.`t1_1024`.`a1`) = `test`.`t2_1024`.`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`,<exists>(select `test`.`t2_1024`.`b1` from `test`.`t2_1024` where ((`test`.`t2_1024`.`b1` > '0') and (<cache>(`test`.`t1_1024`.`a1`) = `test`.`t2_1024`.`b1`))))) select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0'); @@ -817,7 +817,7 @@ 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 DEPENDENT 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` where <expr_cache><`test`.`t1_1024`.`a1`>(<in_optimizer>(`test`.`t1_1024`.`a1`,`test`.`t1_1024`.`a1` in (select 1 from `test`.`t2_1024` where ((`test`.`t2_1024`.`b1` > '0') and (<cache>(`test`.`t1_1024`.`a1`) = substr(`test`.`t2_1024`.`b1`,1,1024)))))) +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`,<exists>(select substr(`test`.`t2_1024`.`b1`,1,1024) from `test`.`t2_1024` where ((`test`.`t2_1024`.`b1` > '0') and (<cache>(`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'); @@ -882,7 +882,7 @@ 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 DEPENDENT 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` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,<exists>(select 1 from `test`.`t2_1025` where ((`test`.`t2_1025`.`b1` > '0') and (<cache>(`test`.`t1_1025`.`a1`) = `test`.`t2_1025`.`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`,<exists>(select `test`.`t2_1025`.`b1` from `test`.`t2_1025` where ((`test`.`t2_1025`.`b1` > '0') and (<cache>(`test`.`t1_1025`.`a1`) = `test`.`t2_1025`.`b1`))))) select left(a1,7), left(a2,7) from t1_1025 where a1 in (select b1 from t2_1025 where b1 > '0'); @@ -910,7 +910,7 @@ 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 DEPENDENT 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` where <expr_cache><`test`.`t1_1025`.`a1`>(<in_optimizer>(`test`.`t1_1025`.`a1`,`test`.`t1_1025`.`a1` in (select 1 from `test`.`t2_1025` where ((`test`.`t2_1025`.`b1` > '0') and (<cache>(`test`.`t1_1025`.`a1`) = substr(`test`.`t2_1025`.`b1`,1,1025)))))) +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`,<exists>(select substr(`test`.`t2_1025`.`b1`,1,1025) from `test`.`t2_1025` where ((`test`.`t2_1025`.`b1` > '0') and (<cache>(`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'); @@ -951,7 +951,7 @@ 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'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; explain extended 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'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; create table t1 (s1 int); create table t2 (s2 int); insert into t1 values (5),(1),(0); @@ -1097,7 +1097,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 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`))))) +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 `test`.`t2`.`c` 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 @@ -1112,7 +1112,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 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` where <expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` where (<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`)))))) and (<cache>(`test`.`t1`.`a`) = `test`.`t2`.`c`))))) +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`t2`.`c` from `test`.`t2` where (<nop>(<expr_cache><`test`.`t2`.`d`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t2`.`d`,<exists>(select `test`.`t3`.`e` from `test`.`t3` where ((`test`.`t1`.`b` = `test`.`t3`.`e`) and (<cache>(`test`.`t2`.`d`) >= `test`.`t3`.`e`)))))) and (<cache>(`test`.`t1`.`a`) = `test`.`t2`.`c`))))) select a from t1 where a in (select c from t2 where d >= some(select e from t3 where b=e)); a @@ -1136,27 +1136,36 @@ drop table t2; create table t1 (a1 int key); create table t2 (b1 int); insert into t1 values (5); +Only the last query returns correct result. Filed as BUG#40037. +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=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 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,materialization=off'; +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=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'; +set @@optimizer_switch='materialization=on,in_to_exists=off,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'; +set @@optimizer_switch='materialization=off,in_to_exists=on,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 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); +min(a1) +set @@optimizer_switch='materialization=off,in_to_exists=off,semijoin=on'; 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 @@ -1167,7 +1176,7 @@ 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'; +set @@optimizer_switch='materialization=on,in_to_exists=off,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 @@ -1187,7 +1196,7 @@ 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'; +SET @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=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 @@ -1208,7 +1217,7 @@ 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'; +SET @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=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 @@ -1237,7 +1246,7 @@ i 3 4 set @save_optimizer_switch=@@optimizer_switch; -set session optimizer_switch='materialization=off'; +set session optimizer_switch='materialization=off,in_to_exists=on'; select * from t1 where t1.i in (select t2.i from t2 join t3 where t2.i + t3.i = 5); i 1 @@ -1380,34 +1389,41 @@ INSERT IGNORE INTO t1 VALUES (1,1),(2,2); CREATE TABLE t2 ( f2 int); INSERT IGNORE INTO t2 VALUES (3),(4); CREATE TABLE t3 (f3a int, f3b int); -set session optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off'; +set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,in_to_exists=off'; EXPLAIN SELECT * FROM t2 WHERE (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 3 SUBQUERY t1 ALL NULL NULL NULL NULL 2 2 SUBQUERY t3 system NULL NULL NULL NULL 0 const row not found SELECT * FROM t2 WHERE (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1); f2 EXPLAIN +SELECT (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where +2 SUBQUERY t3 system NULL NULL NULL NULL 0 const row not found +SELECT (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1); +(SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1) +NULL +EXPLAIN SELECT * FROM t2 WHERE (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 3 SUBQUERY t1 ALL NULL NULL NULL NULL 2 2 SUBQUERY t3 system NULL NULL NULL NULL 0 const row not found SELECT * FROM t2 WHERE (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1); f2 -insert into t3 values (1,1),(2,2); EXPLAIN -SELECT * FROM t2 WHERE (SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1); +SELECT (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where -3 SUBQUERY t1 ALL NULL NULL NULL NULL 2 -2 SUBQUERY t3 ALL NULL NULL NULL NULL 2 Using where -SELECT * FROM t2 WHERE (SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1); -f2 -3 -4 +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where +2 SUBQUERY t3 system NULL NULL NULL NULL 0 const row not found +SELECT (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1); +(SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1) +NULL drop table t1, t2, t3; # # LPBUG#730604 Assertion `bit < (map)->n_bits' failed in maria-5.3 with @@ -1417,7 +1433,7 @@ CREATE TABLE t1 (f1 int NOT NULL, f2 int, f3 int) ; CREATE TABLE t2 (f1 int NOT NULL, f2 int, f3 int) ; INSERT INTO t1 VALUES (60, 3, null), (61, null, 77); INSERT INTO t2 VALUES (1000,6,2); -set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off'; +set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,in_to_exists=off'; EXPLAIN SELECT (f1, f2, f3) NOT IN (SELECT COUNT(DISTINCT f2), f1, f3 FROM t1 GROUP BY f1, f3) diff --git a/mysql-test/r/subselect_mat_cost.result b/mysql-test/r/subselect_mat_cost.result new file mode 100644 index 00000000000..9d6986cf092 --- /dev/null +++ b/mysql-test/r/subselect_mat_cost.result @@ -0,0 +1,3771 @@ +drop table if exists t1, t2, t1_1024, t2_1024; +drop procedure if exists make_t1_indexes; +drop procedure if exists make_t2_indexes; +drop procedure if exists remove_t1_indexes; +drop procedure if exists remove_t2_indexes; +drop procedure if exists add_materialization_data; +drop procedure if exists delete_materialization_data; +drop procedure if exists set_all_columns_not_null; +drop procedure if exists set_all_columns_nullable; +create table t1 (a1 char(8), a2 char(8), a3 char(8), a4 int); +insert into t1 values ('1 - 00', '2 - 00', '3 - 00', 0); +insert into t1 values ('1 - 01', '2 - 01', '3 - 01', 1); +insert into t1 values ('1 - 02', '2 - 02', '3 - 02', 2); +create table t2 (b1 char(8), b2 char(8), b3 char(8), b4 int); +insert into t2 values ('1 - 01', '2 - 01', '3 - 01', 1); +insert into t2 values ('1 - 01', '2 - 01', '3 - 02', 2); +insert into t2 values ('1 - 02', '2 - 02', '3 - 03', 3); +insert into t2 values ('1 - 02', '2 - 02', '3 - 04', 4); +insert into t2 values ('1 - 03', '2 - 03', '3 - 05', 5); +create table t1_1024 (a1 blob(1024), a2 blob(1024)); +insert into t1_1024 values (concat('1 - 00', repeat('x', 1018)), concat('2 - 00', repeat('x', 1018))); +insert into t1_1024 values (concat('1 - 01', repeat('x', 1018)), concat('2 - 01', repeat('x', 1018))); +create table t2_1024 (b1 blob(1024), b2 blob(1024)); +insert into t2_1024 values (concat('1 - 01', repeat('x', 1018)), concat('2 - 01', repeat('x', 1018))); +insert into t2_1024 values (concat('1 - 02', repeat('x', 1018)), concat('2 - 02', repeat('x', 1018))); +insert into t2_1024 values (concat('1 - 03', repeat('x', 1018)), concat('2 - 03', repeat('x', 1018))); +insert into t2_1024 values (concat('1 - 04', repeat('x', 1018)), concat('2 - 04', repeat('x', 1018))); +create procedure make_t1_indexes() +begin +create index it1i1 on t1 (a1); +create index it1i2 on t1 (a2); +create index it1i3 on t1 (a1, a2); +create index it1_1024i1 on t1_1024 (a1(6)); +create index it1_1024i2 on t1_1024 (a2(6)); +create index it1_1024i3 on t1_1024 (a1(6), a2(6)); +end| +create procedure make_t2_indexes() +begin +create index it2i1 on t2 (b1); +create index it2i2 on t2 (b2); +create index it2i3 on t2 (b1, b2); +create unique index it2i4 on t2 (b1, b2, b3); +create index it2_1024i1 on t2_1024 (b1(6)); +create index it2_1024i2 on t2_1024 (b2(6)); +create index it2_1024i3 on t2_1024 (b1(6), b2(6)); +end| +create procedure remove_t1_indexes() +begin +drop index it1i1 on t1; +drop index it1i2 on t1; +drop index it1i3 on t1; +drop index it1_1024i1 on t1_1024; +drop index it1_1024i2 on t1_1024; +drop index it1_1024i3 on t1_1024; +end| +create procedure remove_t2_indexes() +begin +drop index it2i1 on t2; +drop index it2i2 on t2; +drop index it2i3 on t2; +drop index it2i4 on t2; +drop index it2_1024i1 on t2_1024; +drop index it2_1024i2 on t2_1024; +drop index it2_1024i3 on t2_1024; +end| +create procedure add_materialization_data() +begin +insert into t1 values ('1 - 03', '2 - 03', '3 - 03', 3); +insert into t1 values ('1 - 04', '2 - 04', '3 - 04', 4); +insert into t1 values ('1 - 05', '2 - 05', '3 - 05', 5); +insert into t1 values ('1 - 06', '2 - 06', '3 - 06', 6); +insert into t1 values ('1 - 07', '2 - 07', '3 - 07', 7); +insert into t1_1024 values (concat('1 - 03', repeat('x', 1018)), concat('2 - 03', repeat('x', 1018))); +end| +create procedure delete_materialization_data() +begin +delete from t1 where a1 >= '1 - 03'; +delete from t1_1024 where a1 >= '1 - 03'; +end| +create procedure set_all_columns_not_null() +begin +alter table t1 modify a1 char(8) not null, modify a2 char(8) not null, modify a3 char(8) not null; +alter table t2 modify b1 char(8) not null, modify b2 char(8) not null, modify b3 char(8) not null; +end| +create procedure set_all_columns_nullable() +begin +alter table t1 modify a1 char(8) null, modify a2 char(8) null, modify a3 char(8) null; +alter table t2 modify b1 char(8) null, modify b2 char(8) null, modify b3 char(8) null; +end| + +/****************************************************************************** +1. Both materialization and in-to-exists are ON, make a cost-based choice. +******************************************************************************/ +set @@optimizer_switch='materialization=on,in_to_exists=on'; + +/* 1.1 In-to-exists is cheaper */ +call make_t1_indexes(); +/* 1.1.1 non-indexed table access */ + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i2 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +3 DEPENDENT UNION t3 ALL NULL NULL NULL NULL 5 Using where +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ref it1i1,it1i3 it1i1 9 const 1 Using where; Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i1,it1i2,it1i3 it1i3 18 NULL 3 Using where; Using index +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 +select a1 from t1 where a1 in (select max(b1) from t2); +a1 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +/* 1.1.2 indexed table access, nullabale columns. */ +call make_t2_indexes(); + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using index +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i1 9 func 2 Using index; Using where; Full scan on NULL key +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using index +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i3 9 func 2 Using index; Using where; Full scan on NULL key +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using index +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i3 9 func 2 Using index; Using where; Full scan on NULL key +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 index_subquery it2i2 it2i2 9 func 2 Using index +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i4 18 func,func 1 Using index; Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i2 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 9 func 2 Using index +3 DEPENDENT UNION t3 index NULL it2i4 27 NULL 5 Using where; Using index +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ref it1i1,it1i3 it1i1 9 const 1 Using where; Using index +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 9 const 1 Using index condition +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i4 18 func,func 1 Using index; Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 9 NULL 1 Using where; Using index +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 18 NULL 1 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 18 NULL 1 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 index NULL it2i4 27 NULL 1 Using index +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 index NULL it2i4 27 NULL 1 Using where; Using index +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 range it2i4,it2i1,it2i3 it2i4 27 NULL 2 Using where; Using index for group-by +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i3 it2_1024i3 9 func 1 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i2,it2_1024i3 it2_1024i1 9 func 2 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i1 9 const 2 Using index; Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i1,it1i2,it1i3 it1i3 18 NULL 3 Using where; Using index +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +select a1 from t1 where a1 in (select max(b1) from t2); +a1 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +/* 1.1.3 indexed table access, non-nullabale columns. */ +call set_all_columns_not_null(); + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 8 NULL 3 Using index +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i4 8 func 1 Using index; Using where +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 16 NULL 3 Using index +2 DEPENDENT SUBQUERY t2 ref it2i4,it2i1,it2i2,it2i3 it2i4 8 func 2 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 16 NULL 3 Using index +2 DEPENDENT SUBQUERY t2 ref it2i4,it2i1,it2i2,it2i3 it2i4 8 func 2 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 16 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 index_subquery it2i2 it2i2 8 func 2 Using index +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 16 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i4 16 func,func 1 Using index; Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i2 8 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 8 func 2 Using index +3 DEPENDENT UNION t3 index NULL it2i4 24 NULL 5 Using where; Using index +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ref it1i1,it1i3 it1i1 8 const 1 Using where; Using index +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 8 const 1 Using index condition +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 16 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i4 16 func,func 1 Using index; Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 8 NULL 1 Using where; Using index +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 16 NULL 1 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 16 NULL 1 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 index NULL it2i4 24 NULL 1 Using index +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 index NULL it2i4 24 NULL 1 Using where; Using index +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2 range it2i4,it2i1,it2i3 it2i4 24 NULL 2 Using where; Using index for group-by +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i3 it2_1024i3 9 func 1 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i2,it2_1024i3 it2_1024i1 9 func 2 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i1 8 const 5 Using index; Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i1,it1i2,it1i3 it1i3 16 NULL 3 Using where; Using index +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 8 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 16 NULL 3 Using where; Using index +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 8 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +select a1 from t1 where a1 in (select max(b1) from t2); +a1 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 8 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +call set_all_columns_nullable(); + +/* 1.2 Materialization is cheaper */ +call add_materialization_data(); +call remove_t1_indexes(); +/* 1.2.1 non-indexed table access */ +call remove_t2_indexes(); + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 +1 - 03 1 +1 - 04 0 +1 - 05 0 +1 - 06 0 +1 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 +1 - 04 2 - 04 +1 - 05 2 - 05 +1 - 06 2 - 06 +1 - 07 2 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +3 DEPENDENT UNION t3 ALL NULL NULL NULL NULL 5 Using where +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 +2 - 03 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +1 - 03 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 +select a1 from t1 where a1 in (select max(b1) from t2); +a1 +1 - 03 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +/* 1.2.2 indexed table access, nullabale columns. */ +call make_t2_indexes(); + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 9 NULL 5 Using where; Using index +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 +1 - 03 1 +1 - 04 0 +1 - 05 0 +1 - 06 0 +1 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 SUBQUERY t2 index it2i4,it2i1,it2i2,it2i3 it2i3 18 NULL 5 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 SUBQUERY t2 range it2i4,it2i1,it2i2,it2i3 it2i3 9 NULL 4 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i2 it2i2 9 NULL 5 Using index +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i2,it2i3 it2i3 18 NULL 5 Using where; Using index +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 +1 - 04 2 - 04 +1 - 05 2 - 05 +1 - 06 2 - 06 +1 - 07 2 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 9 func 2 Using index +3 DEPENDENT UNION t3 index NULL it2i4 27 NULL 5 Using where; Using index +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 +2 - 03 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ref it2i2 it2i2 9 const 1 Using index condition +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i2,it2i3 it2i4 27 NULL 5 Using index +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 9 NULL 5 Using where; Using index +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 18 NULL 5 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 18 NULL 5 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 range NULL it2i4 27 NULL 6 Using index for group-by +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 range NULL it2i4 27 NULL 6 Using where; Using index for group-by +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 range it2i4,it2i1,it2i3 it2i4 27 NULL 2 Using where; Using index for group-by +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i3 it2_1024i3 9 func 1 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i2,it2_1024i3 it2_1024i1 9 func 2 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i1 9 const 2 Using index; Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +1 - 03 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +select a1 from t1 where a1 in (select max(b1) from t2); +a1 +1 - 03 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +/* 1.2.3 indexed table access, non-nullabale columns. */ +call set_all_columns_not_null(); + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 8 NULL 5 Using where; Using index +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 +1 - 03 1 +1 - 04 0 +1 - 05 0 +1 - 06 0 +1 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 SUBQUERY t2 index it2i4,it2i1,it2i2,it2i3 it2i3 16 NULL 5 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 SUBQUERY t2 range it2i4,it2i1,it2i2,it2i3 it2i3 8 NULL 4 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i2 it2i2 8 NULL 5 Using index +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i2,it2i3 it2i3 16 NULL 5 Using where; Using index +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 +1 - 04 2 - 04 +1 - 05 2 - 05 +1 - 06 2 - 06 +1 - 07 2 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 8 func 2 Using index +3 DEPENDENT UNION t3 index NULL it2i4 24 NULL 5 Using where; Using index +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 +2 - 03 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 ref it2i2 it2i2 8 const 1 Using index condition +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i2,it2i3 it2i4 24 NULL 5 Using index +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 8 NULL 5 Using where; Using index +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 16 NULL 5 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 16 NULL 5 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 range NULL it2i4 24 NULL 6 Using index for group-by +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 range NULL it2i4 24 NULL 6 Using where; Using index for group-by +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY t2 range it2i4,it2i1,it2i3 it2i4 24 NULL 2 Using where; Using index for group-by +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i3 it2_1024i3 9 func 1 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i2,it2_1024i3 it2_1024i1 9 func 2 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i1 8 const 5 Using index; Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +1 - 03 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +select a1 from t1 where a1 in (select max(b1) from t2); +a1 +1 - 03 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +call set_all_columns_nullable(); +/****************************************************************************** +2. Materialization is OFF, in-to-exists is ON, materialization is cheaper. +******************************************************************************/ +set @@optimizer_switch='materialization=off,in_to_exists=on'; +/* 2.1 non-indexed table access */ +call remove_t2_indexes(); + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 +1 - 03 1 +1 - 04 0 +1 - 05 0 +1 - 06 0 +1 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 +1 - 04 2 - 04 +1 - 05 2 - 05 +1 - 06 2 - 06 +1 - 07 2 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +3 DEPENDENT UNION t3 ALL NULL NULL NULL NULL 5 Using where +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 +2 - 03 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +1 - 03 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 +select a1 from t1 where a1 in (select max(b1) from t2); +a1 +1 - 03 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +/* 2.2 indexed table access, nullabale columns. */ +call make_t2_indexes(); + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i1 9 func 2 Using index; Using where; Full scan on NULL key +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 +1 - 03 1 +1 - 04 0 +1 - 05 0 +1 - 06 0 +1 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i3 9 func 2 Using index; Using where; Full scan on NULL key +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i3 9 func 2 Using index; Using where; Full scan on NULL key +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index_subquery it2i2 it2i2 9 func 2 Using index +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i4 18 func,func 1 Using index; Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 +1 - 04 2 - 04 +1 - 05 2 - 05 +1 - 06 2 - 06 +1 - 07 2 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 9 func 2 Using index +3 DEPENDENT UNION t3 index NULL it2i4 27 NULL 5 Using where; Using index +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 +2 - 03 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 9 const 1 Using index condition +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i4 18 func,func 1 Using index; Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 9 NULL 1 Using where; Using index +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 18 NULL 1 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 18 NULL 1 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index NULL it2i4 27 NULL 1 Using index +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index NULL it2i4 27 NULL 1 Using where; Using index +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 range it2i4,it2i1,it2i3 it2i4 27 NULL 2 Using where; Using index for group-by +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i3 it2_1024i3 9 func 1 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i2,it2_1024i3 it2_1024i1 9 func 2 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i1 9 const 2 Using index; Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +1 - 03 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +select a1 from t1 where a1 in (select max(b1) from t2); +a1 +1 - 03 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +/* 2.3 indexed table access, non-nullabale columns. */ +call set_all_columns_not_null(); + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i4 8 func 1 Using index; Using where +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 +1 - 03 1 +1 - 04 0 +1 - 05 0 +1 - 06 0 +1 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 DEPENDENT SUBQUERY t2 ref it2i4,it2i1,it2i2,it2i3 it2i4 8 func 2 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 +2 DEPENDENT SUBQUERY t2 ref it2i4,it2i1,it2i2,it2i3 it2i4 8 func 2 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 +1 - 03 2 - 03 1 +1 - 04 2 - 04 0 +1 - 05 2 - 05 0 +1 - 06 2 - 06 0 +1 - 07 2 - 07 0 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index_subquery it2i2 it2i2 8 func 2 Using index +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i4 16 func,func 1 Using index; Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 +1 - 04 2 - 04 +1 - 05 2 - 05 +1 - 06 2 - 06 +1 - 07 2 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 8 func 2 Using index +3 DEPENDENT UNION t3 index NULL it2i4 24 NULL 5 Using where; Using index +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 +2 - 03 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 8 const 1 Using index condition +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i2,it2i3 it2i4 16 func,func 1 Using index; Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 +1 - 03 2 - 03 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 8 NULL 1 Using where; Using index +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 16 NULL 1 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 16 NULL 1 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 +1 - 03 2 - 03 3 - 03 3 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index NULL it2i4 24 NULL 1 Using index +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 index NULL it2i4 24 NULL 1 Using where; Using index +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY t2 range it2i4,it2i1,it2i3 it2i4 24 NULL 2 Using where; Using index for group-by +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i3 it2_1024i3 9 func 1 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i2,it2_1024i3 it2_1024i1 9 func 2 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +1 - 03x 2 - 03x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i1 8 const 5 Using index; Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +1 - 03 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +1 - 03 +1 - 04 +1 - 05 +1 - 06 +1 - 07 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +select a1 from t1 where a1 in (select max(b1) from t2); +a1 +1 - 03 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 8 Using where +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +call set_all_columns_nullable(); +/****************************************************************************** +3. Materialization is ON, in-to-exists is OFF, in-to-exists is cheaper. +******************************************************************************/ +set @@optimizer_switch='materialization=on,in_to_exists=off'; +call delete_materialization_data(); +call make_t1_indexes(); +/* 3.1 non-indexed table access */ +call remove_t2_indexes(); + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i2 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +3 DEPENDENT UNION t3 ALL NULL NULL NULL NULL 5 Using where +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ref it1i1,it1i3 it1i1 9 const 1 Using where; Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using where; Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 ALL NULL NULL NULL NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i1,it1i2,it1i3 it1i3 18 NULL 3 Using where; Using index +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 +select a1 from t1 where a1 in (select max(b1) from t2); +a1 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 Using where +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +/* 3.2 indexed table access, nullabale columns. */ +call make_t2_indexes(); + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using index +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 9 NULL 5 Using where; Using index +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using index +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 18 NULL 5 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using index +2 SUBQUERY t2 range it2i4,it2i1,it2i3 it2i3 9 NULL 4 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 SUBQUERY t2 index NULL it2i2 9 NULL 5 Using index +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 18 NULL 5 Using where; Using index +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i2 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 9 func 2 Using index +3 DEPENDENT UNION t3 index NULL it2i4 27 NULL 5 Using where; Using index +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ref it1i1,it1i3 it1i1 9 const 1 Using where; Using index +2 SUBQUERY t2 ref it2i2 it2i2 9 const 1 Using index condition +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 18 NULL 3 Using where; Using index +2 SUBQUERY t2 index NULL it2i4 27 NULL 5 Using index +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 9 NULL 5 Using where; Using index +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 18 NULL 5 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 18 NULL 5 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 range NULL it2i4 27 NULL 6 Using index for group-by +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 range NULL it2i4 27 NULL 6 Using where; Using index for group-by +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 range it2i4,it2i1,it2i3 it2i4 27 NULL 2 Using where; Using index for group-by +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i3 it2_1024i3 9 func 1 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i2,it2_1024i3 it2_1024i1 9 func 2 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i1 9 const 2 Using index; Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i1,it1i2,it1i3 it1i3 18 NULL 3 Using where; Using index +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 18 NULL 3 Using where; Using index +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +select a1 from t1 where a1 in (select max(b1) from t2); +a1 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 9 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +/* 3.3 indexed table access, non-nullabale columns. */ +call set_all_columns_not_null(); + +/* A. Subqueries in the SELECT clause. */ +explain +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 8 NULL 3 Using index +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 8 NULL 5 Using where; Using index +select a1, a1 in (select b1 from t2 where b1 > '0') from t1; +a1 a1 in (select b1 from t2 where b1 > '0') +1 - 00 0 +1 - 01 1 +1 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 16 NULL 3 Using index +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 16 NULL 5 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +explain +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 16 NULL 3 Using index +2 SUBQUERY t2 range it2i4,it2i1,it2i3 it2i3 8 NULL 4 Using where; Using index +select a1, a2, (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') from t1; +a1 a2 (a1, a2) in (select b1, b2 from t2 where b1 > '0' and b1 < '9') +1 - 00 2 - 00 0 +1 - 01 2 - 01 1 +1 - 02 2 - 02 1 + +/* +B. "Natural" examples of subqueries without grouping that +cannot be flattened into semijoin. +*/ +explain +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 16 NULL 3 Using where; Using index +2 SUBQUERY t2 index NULL it2i2 8 NULL 5 Using index +select a1 from t1 where a1 in (select b2 from t2) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 16 NULL 3 Using where; Using index +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 16 NULL 5 Using where; Using index +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0') or a2 < '9'; +a1 a2 +1 - 00 2 - 00 +1 - 01 2 - 01 +1 - 02 2 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i2 8 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY t2 ref it2i2 it2i2 8 func 2 Using index +3 DEPENDENT UNION t3 index NULL it2i4 24 NULL 5 Using where; Using index +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a2 from t1 where a2 in (select b2 from t2 UNION select b3 from t2 as t3); +a2 +2 - 01 +2 - 02 + +explain +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ref it1i1,it1i3 it1i1 8 const 1 Using where; Using index +2 SUBQUERY t2 ref it2i2 it2i2 8 const 1 Using index condition +select a1 from t1 where a1 = '1 - 02' and a1 in (select max(b1) from t2 where b2 = '2 - 02'); +a1 +1 - 02 + +explain +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i3 16 NULL 3 Using where; Using index +2 SUBQUERY t2 index NULL it2i4 24 NULL 5 Using index +select a1, a2 from t1 where (a1, a2) in (select b1, b2 from t2 order by b3); +a1 a2 +1 - 01 2 - 01 +1 - 02 2 - 02 + +/* C. Subqueries in the WHERE clause with GROUP BY. */ +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i1 8 NULL 5 Using where; Using index +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +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 Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 16 NULL 5 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 index it2i4,it2i1,it2i3 it2i3 16 NULL 5 Using where; Using index +select * from t1 where (a1, a2) in (select b1, b2 from t2 where b1 > '0' group by b1, b2 having b2 < '2 - 04'); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 +1 - 02 2 - 02 3 - 02 2 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 range NULL it2i4 24 NULL 6 Using index for group-by +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 group by b1, b2, b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +explain +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 range NULL it2i4 24 NULL 6 Using where; Using index for group-by +select * from t1 where (a1, a2, a3) in (select b1, b2, b3 from t2 where b3 = '3 - 02' group by b1, b2); +a1 a2 a3 a4 + +explain +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +2 SUBQUERY t2 range it2i4,it2i1,it2i3 it2i4 24 NULL 2 Using where; Using index for group-by +select * from t1 where (a1,a2,a3) in (select b1,b2,b3 from t2 where b1 = '1 - 01' group by b1,b2,b3); +a1 a2 a3 a4 +1 - 01 2 - 01 3 - 01 1 + +/* +D. Subqueries for which materialization is not possible, and the +optimizer reverts to in-to-exists. +*/ +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i3 it2_1024i3 9 func 1 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select b1 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 index_subquery it2_1024i1,it2_1024i2,it2_1024i3 it2_1024i1 9 func 2 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select b1, b2 from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + +explain +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x +explain +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1_1024 ALL it1_1024i2 NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t2_1024 range it2_1024i1,it2_1024i3 it2_1024i1 9 NULL 4 Using where +select left(a1,7), left(a2,7) from t1_1024 where (a1,a2) in (select substring(b1,1,1024), substring(b2,1,1024) from t2_1024 where b1 > '0') or a2 < '9'; +left(a1,7) left(a2,7) +1 - 00x 2 - 00x +1 - 01x 2 - 01x + + +/* E. Edge cases. */ + +/* E.1 Both materialization and in_to_exists cannot be off. */ +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off,in_to_exists=off'; +select * from t1 where a1 in (select b1 from t2 where b1 > '0' group by b1); +ERROR HY000: At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'. +set @@optimizer_switch = @save_optimizer_switch; +/* E.2 Outer query without tables, always uses IN-TO-EXISTS. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY t2 index_subquery it2i4,it2i1,it2i3 it2i1 8 const 5 Using index; Using where +select '1 - 03' in (select b1 from t2 where b1 > '0'); +'1 - 03' in (select b1 from t2 where b1 > '0') +1 +/* E.3 Subqueries without tables. */ +explain +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i1,it1i2,it1i3 it1i3 16 NULL 3 Using where; Using index +Warnings: +Note 1249 Select 2 was reduced during optimization +select a1 from t1 where a1 in (select '1 - 03') or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +UNION subqueries are currently limited to only use IN-TO-EXISTS. +explain +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 8 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used +NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL +select a1 from t1 where a1 in (select '1 - 03' UNION select '1 - 02'); +a1 +1 - 02 +/* E.4 optimize_cond detects FALSE where/having clause. */ +explain +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index it1i2 it1i3 16 NULL 3 Using where; Using index +2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +select a1 from t1 where a1 in (select b1 from t2 where b1 = b2 and b2 = '1 - 03' and b1 = '1 - 02' ) or a2 < '9'; +a1 +1 - 00 +1 - 01 +1 - 02 +/* E.5 opt_sum_query detects no matching min/max row or substitutes MIN/MAX with a const. */ +TODO this test produces wrong result due to missing logic to handle the case +when JOIN::optimize detects an empty subquery result. +explain +select a1 from t1 where a1 in (select max(b1) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 8 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +select a1 from t1 where a1 in (select max(b1) from t2); +a1 + +explain +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL it1i1 8 NULL 3 Using where; Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No matching min/max row +select a1 from t1 where a1 in (select max(b1) from t2 where b1 = '7 - 02'); +a1 +/* E.6 make_join_select detects impossible WHERE. * +TODO +/* E.7 constant optimization detects "no matching row in const table". */ +TODO +/* E.8 Impossible WHERE noticed after reading const tables. */ +explain +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +select '1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0'); +'1 - 03' in (select b1 from t2 where b1 > '0' and b1 < '0') +0 + +/* F. UPDATE/DELETE with subqueries. */ + +TODO + +call set_all_columns_nullable(); +drop procedure make_t1_indexes; +drop procedure make_t2_indexes; +drop procedure remove_t1_indexes; +drop procedure remove_t2_indexes; +drop procedure add_materialization_data; +drop procedure delete_materialization_data; +drop procedure set_all_columns_not_null; +drop procedure set_all_columns_nullable; +drop table t1, t2, t1_1024, t2_1024; diff --git a/mysql-test/r/subselect_mat_cost_bugs.result b/mysql-test/r/subselect_mat_cost_bugs.result new file mode 100644 index 00000000000..cd0a6c716bb --- /dev/null +++ b/mysql-test/r/subselect_mat_cost_bugs.result @@ -0,0 +1,234 @@ +# +# LP BUG#643424 valgrind warning in choose_subquery_plan() +# +CREATE TABLE t1 ( +pk int(11) NOT NULL AUTO_INCREMENT, +c1 int(11) DEFAULT NULL, +c2 int(11) DEFAULT NULL, +PRIMARY KEY (pk), +KEY c2 (c2)); +INSERT INTO t1 VALUES (1,NULL,2); +INSERT INTO t1 VALUES (2,7,9); +INSERT INTO t1 VALUES (9,NULL,8); +CREATE TABLE t2 ( +pk int(11) NOT NULL AUTO_INCREMENT, +c1 int(11) DEFAULT NULL, +c2 int(11) DEFAULT NULL, +PRIMARY KEY (pk), +KEY c2 (c2)); +INSERT INTO t2 VALUES (1,1,7); +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='materialization=on,in_to_exists=on,semijoin=off'; +SELECT pk FROM t1 WHERE (c2, c1) IN (SELECT c2, c2 FROM t2); +pk +set session optimizer_switch=@save_optimizer_switch; +drop table t1, t2; +# +# LP BUG#652727 Crash in create_ref_for_key() +# +CREATE TABLE t2 ( +pk int(11) NOT NULL AUTO_INCREMENT, +c1 int(11) DEFAULT NULL, +PRIMARY KEY (pk)); +INSERT INTO t2 VALUES (10,7); +INSERT INTO t2 VALUES (11,1); +INSERT INTO t2 VALUES (17,NULL); +CREATE TABLE t1 ( +pk int(11) NOT NULL AUTO_INCREMENT, +c1 int(11) DEFAULT NULL, +PRIMARY KEY (pk)); +INSERT INTO t1 VALUES (15,1); +INSERT INTO t1 VALUES (19,NULL); +CREATE TABLE t3 (c2 int(11) DEFAULT NULL, KEY c2 (c2)); +INSERT INTO t3 VALUES (1); +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='materialization=on,in_to_exists=on,semijoin=off'; +SELECT c2 +FROM t3 +WHERE (2, 6) IN (SELECT t1.c1, t1.c1 FROM t1 STRAIGHT_JOIN t2 ON t2.pk = t1.pk); +c2 +set session optimizer_switch=@save_optimizer_switch; +drop table t1, t2, t3; +# +# LP BUG#641245 Crash in Item_equal::contains +# +CREATE TABLE t1 ( +pk int(11) NOT NULL AUTO_INCREMENT, +c1 int(11) DEFAULT NULL, +c2 int(11) DEFAULT NULL, +c3 varchar(1) DEFAULT NULL, +c4 varchar(1) DEFAULT NULL, +PRIMARY KEY (pk), +KEY c2 (c2), +KEY c3 (c3,c2)); +INSERT INTO t1 VALUES (10,7,8,'v','v'); +INSERT INTO t1 VALUES (11,1,9,'r','r'); +INSERT INTO t1 VALUES (12,5,9,'a','a'); +create table t1a like t1; +insert into t1a select * from t1; +create table t1b like t1; +insert into t1b select * from t1; +CREATE TABLE t2 ( +pk int(11) NOT NULL AUTO_INCREMENT, +c1 int(11) DEFAULT NULL, +c2 int(11) DEFAULT NULL, +c3 varchar(1) DEFAULT NULL, +c4 varchar(1) DEFAULT NULL, +PRIMARY KEY (pk), +KEY c2 (c2), +KEY c3 (c3,c2)); +INSERT INTO t2 VALUES (1,NULL,2,'w','w'); +INSERT INTO t2 VALUES (2,7,9,'m','m'); +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=off'; +EXPLAIN EXTENDED SELECT pk +FROM t1 +WHERE c1 IN +(SELECT t1a.c1 +FROM (t1b JOIN t2 ON t2.c3 = t1b.c4) LEFT JOIN +t1a ON (t1a.c2 = t1b.pk AND 2) +WHERE t1.pk) ; +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 t2 index c3 c3 9 NULL 2 100.00 Using index +2 DEPENDENT SUBQUERY t1b ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY t1a ref c2 c2 5 test.t1b.pk 2 100.00 Using where +Warnings: +Note 1276 Field or reference 'test.t1.pk' of SELECT #2 was resolved in SELECT #1 +Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` where <expr_cache><`test`.`t1`.`c1`,`test`.`t1`.`pk`>(<in_optimizer>(`test`.`t1`.`c1`,<exists>(select `test`.`t1a`.`c1` from `test`.`t1b` join `test`.`t2` left join `test`.`t1a` on((2 and (`test`.`t1a`.`c2` = `test`.`t1b`.`pk`))) where (`test`.`t1`.`pk` and (<cache>(`test`.`t1`.`c1`) = `test`.`t1a`.`c1`) and (`test`.`t1b`.`c4` = `test`.`t2`.`c3`))))) +SELECT pk +FROM t1 +WHERE c1 IN +(SELECT t1a.c1 +FROM (t1b JOIN t2 ON t2.c3 = t1b.c4) LEFT JOIN +t1a ON (t1a.c2 = t1b.pk AND 2) +WHERE t1.pk) ; +pk +DROP TABLE t1, t1a, t1b, t2; +# +# LP BUG#714808 Assertion `outer_lookup_keys <= outer_record_count' +# failed with materialization +CREATE TABLE t1 ( pk int(11), PRIMARY KEY (pk)) ; +CREATE TABLE t2 ( f2 int(11)) ; +CREATE TABLE t3 ( f1 int(11), f3 varchar(1), KEY (f1)) ; +INSERT INTO t3 VALUES (7,'f'); +set @@optimizer_switch='materialization=on,in_to_exists=on,semijoin=off'; +EXPLAIN +SELECT t1.* +FROM t3 RIGHT JOIN t1 ON t1.pk = t3.f1 +WHERE t3.f3 OR ( 3 ) IN ( SELECT f2 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 +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +SELECT t1.* +FROM t3 RIGHT JOIN t1 ON t1.pk = t3.f1 +WHERE t3.f3 OR ( 3 ) IN ( SELECT f2 FROM t2 ); +pk +drop table t1,t2,t3; +# +# LP BUG#714999 Second crash in select_describe() with nested subqueries +# +CREATE TABLE t1 ( pk int(11)) ; +INSERT INTO t1 VALUES (29); +CREATE TABLE t2 ( f1 varchar(1)) ; +INSERT INTO t2 VALUES ('f'),('d'); +CREATE TABLE t3 ( f2 varchar(1)) ; +EXPLAIN SELECT f2 FROM t3 WHERE ( +SELECT MAX( pk ) FROM t1 +WHERE EXISTS ( +SELECT DISTINCT f1 +FROM t2 +) +) IS NULL ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +2 SUBQUERY t1 system NULL NULL NULL NULL 1 +3 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using temporary +drop table t1, t2, t3; +# +# LP BUG#715034 Item_sum_distinct::clear(): Assertion `tree != 0' failed +# +CREATE TABLE t2 ( f2 int(11)) ; +CREATE TABLE t1 ( f3 int(11), KEY (f3)) ; +INSERT INTO t1 VALUES (6),(4); +EXPLAIN +SELECT * FROM (SELECT * FROM t2) AS a2 +WHERE (SELECT distinct SUM(distinct f3 ) FROM t1); +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 +3 SUBQUERY t1 index NULL f3 5 NULL 2 Using index +2 DERIVED NULL NULL NULL NULL NULL NULL NULL no matching row in const table +insert into t2 values (1),(2); +EXPLAIN +SELECT * FROM (SELECT * FROM t2) AS a2 +WHERE (SELECT distinct SUM(distinct f3 ) FROM t1); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 +3 SUBQUERY t1 index NULL f3 5 NULL 2 Using index +2 DERIVED t2 ALL NULL NULL NULL NULL 2 +drop table t1,t2; +# +# LP BUG#715027 Assertion `!table || (!table->read_set || bitmap_is_set(table->read_set, field_index))' failed +# +CREATE TABLE t1 ( f1 int(11), PRIMARY KEY (f1)) ; +INSERT INTO t1 VALUES (28),(29); +CREATE TABLE t2 ( f2 int(11), f3 int(11), f10 varchar(1)) ; +INSERT INTO t2 VALUES (NULL,6,'f'),(4,2,'d'); +EXPLAIN +SELECT alias2.f2 AS field1 +FROM t1 AS alias1 JOIN ( SELECT * FROM t2 ) AS alias2 ON alias2.f3 = alias1.f1 +WHERE ( +SELECT t2.f2 +FROM t2 JOIN t1 ON t1.f1 +WHERE t1.f1 AND alias2.f10 +) +ORDER BY field1 ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using where; Using filesort +1 PRIMARY alias1 eq_ref PRIMARY PRIMARY 4 alias2.f3 1 Using index +3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 +3 DEPENDENT SUBQUERY t1 index NULL PRIMARY 4 NULL 2 Using where; Using index; Using join buffer (flat, BNL join) +2 DERIVED t2 ALL NULL NULL NULL NULL 2 +SELECT alias2.f2 AS field1 +FROM t1 AS alias1 JOIN ( SELECT * FROM t2 ) AS alias2 ON alias2.f3 = alias1.f1 +WHERE ( +SELECT t2.f2 +FROM t2 JOIN t1 ON t1.f1 +WHERE t1.f1 AND alias2.f10 +) +ORDER BY field1 ; +field1 +drop table t1,t2; +# +# LP BUG#718578 Yet another Assertion `!table || +# (!table->read_set || bitmap_is_set(table->read_set, field_index))' +CREATE TABLE t1 ( f1 int(11), f2 int(11), f3 int(11)) ; +INSERT IGNORE INTO t1 VALUES (28,5,6),(29,NULL,4); +CREATE TABLE t2 ( f10 varchar(1) ); +INSERT IGNORE INTO t2 VALUES (NULL); +SELECT f1 AS field1 +FROM ( SELECT * FROM t1 ) AS alias1 +WHERE (SELECT t1.f1 +FROM t2 JOIN t1 ON t1.f2 +WHERE alias1.f3 AND t1.f3) AND f2 +ORDER BY field1; +field1 +28 +drop table t1,t2; +# +# LP BUG#601124 Bug in eliminate_item_equal +# leads to crash in Item_func::Item_func +CREATE TABLE t1 ( f1 int(11), f3 varchar(1)) ; +INSERT INTO t1 VALUES (5,'m'),(NULL,'c'); +CREATE TABLE t2 ( f2 int(11), f3 varchar(1)) ; +INSERT INTO t2 VALUES (6,'f'),(2,'d'); +CREATE TABLE t3 ( f2 int(11), f3 varchar(1)) ; +INSERT INTO t3 VALUES (6,'f'),(2,'d'); +SELECT * FROM t3 +WHERE ( f2 ) IN (SELECT t1.f1 +FROM t1 STRAIGHT_JOIN t2 ON t2.f3 = t1.f3 +WHERE t2.f3 = 'c'); +f2 f3 +drop table t1,t2,t3; +# +# LP BUG#718593 Crash in substitute_for_best_equal_field -> +# eliminate_item_equal -> Item_field::find_item_equal -> Item_equal::contains diff --git a/mysql-test/r/subselect_no_mat.result b/mysql-test/r/subselect_no_mat.result index 9a8840f4d2b..1aa45d467e6 100644 --- a/mysql-test/r/subselect_no_mat.result +++ b/mysql-test/r/subselect_no_mat.result @@ -1,6 +1,6 @@ select @@optimizer_switch like '%materialization=on%'; @@optimizer_switch like '%materialization=on%' -1 +0 set optimizer_switch='materialization=off'; drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t11,t12; drop view if exists v2; @@ -277,7 +277,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`)))) select * from t3 where a >= all (select b from t2); a 7 @@ -427,7 +427,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where 1 +Note 1003 select 1 AS `1` from `test`.`t1` where (1 = (select 1 union select 1)) drop table t1; CREATE TABLE `t1` ( `numeropost` mediumint(8) unsigned NOT NULL auto_increment, @@ -515,7 +515,6 @@ ERROR 21000: Subquery returns more than 1 row show warnings; Level Code Message Error 1242 Subquery returns more than 1 row -Error 1028 Sort aborted drop table t1; create table t1 (a int); insert into t1 values (1),(2),(3); @@ -917,7 +916,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using where; Using index 2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` +Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`t2`.`a` from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` drop table t1,t2,t3; create table t1 (a float); select 10.5 IN (SELECT * from t1 LIMIT 1); @@ -1188,9 +1187,9 @@ SELECT 0 IN (SELECT 1 FROM t1 a); EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables Warnings: -Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)` +Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (<cache>(0) = 1))) AS `0 IN (SELECT 1 FROM t1 a)` INSERT INTO t1 (pseudo) VALUES ('test1'); SELECT 0 IN (SELECT 1 FROM t1 a); 0 IN (SELECT 1 FROM t1 a) @@ -1198,9 +1197,9 @@ SELECT 0 IN (SELECT 1 FROM t1 a); EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables Warnings: -Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)` +Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (<cache>(0) = 1))) AS `0 IN (SELECT 1 FROM t1 a)` drop table t1; CREATE TABLE `t1` ( `i` int(11) NOT NULL default '0', @@ -1511,7 +1510,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < (select max(NULL) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` < (select max(NULL) from `test`.`t2`)))) select * from t3 where a >= some (select b from t2); a explain extended select * from t3 where a >= some (select b from t2); @@ -1519,7 +1518,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(NULL) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= (select min(NULL) from `test`.`t2`)))) select * from t3 where a >= all (select b from t2 group by 1); a 6 @@ -1530,7 +1529,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < <max>(select NULL from `test`.`t2` group by 1))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` < <max>(select NULL from `test`.`t2` group by 1)))) select * from t3 where a >= some (select b from t2 group by 1); a explain extended select * from t3 where a >= some (select b from t2 group by 1); @@ -1538,39 +1537,39 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= <min>(select NULL from `test`.`t2` group by 1))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= <min>(select NULL from `test`.`t2` group by 1)))) select * from t3 where NULL >= any (select b from t2); a explain extended select * from t3 where NULL >= any (select b from t2); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= (select min(NULL) from `test`.`t2`)))) select * from t3 where NULL >= any (select b from t2 group by 1); a explain extended select * from t3 where NULL >= any (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= <min>(select NULL from `test`.`t2` group by 1)))) select * from t3 where NULL >= some (select b from t2); a explain extended select * from t3 where NULL >= some (select b from t2); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= (select min(NULL) from `test`.`t2`)))) select * from t3 where NULL >= some (select b from t2 group by 1); a explain extended select * from t3 where NULL >= some (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= <min>(select NULL from `test`.`t2` group by 1)))) insert into t2 values (2,2), (2,1), (3,3), (3,1); select * from t3 where a > all (select max(b) from t2 group by a); a @@ -1579,9 +1578,9 @@ a explain extended select * from t3 where a > all (select max(b) from t2 group by a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where -2 SUBQUERY t2 ALL NULL NULL NULL NULL 4 100.00 Using temporary; Using filesort +2 SUBQUERY t2 ALL NULL NULL NULL NULL 4 100.00 Using temporary Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`)))) drop table t2, t3; CREATE TABLE `t1` ( `id` mediumint(9) NOT NULL auto_increment, `taskid` bigint(20) NOT NULL default '0', `dbid` int(11) NOT NULL default '0', `create_date` datetime NOT NULL default '0000-00-00 00:00:00', `last_update` datetime NOT NULL default '0000-00-00 00:00:00', PRIMARY KEY (`id`)) ENGINE=MyISAM CHARSET=latin1 AUTO_INCREMENT=3 ; INSERT INTO `t1` (`id`, `taskid`, `dbid`, `create_date`,`last_update`) VALUES (1, 1, 15, '2003-09-29 10:31:36', '2003-09-29 10:31:36'), (2, 1, 21, now(), now()); @@ -1632,7 +1631,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 UNION t1 system NULL NULL NULL NULL 1 100.00 NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select 'e' AS `s1` from `test`.`t1` where 1 +Note 1003 select 'e' AS `s1` from `test`.`t1` where <nop>(<in_optimizer>('f',('f' > <min>(select 'e' from `test`.`t1` union select 'e' from `test`.`t1`)))) drop table t1; CREATE TABLE t1 (number char(11) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1; INSERT INTO t1 VALUES ('69294728265'),('18621828126'),('89356874041'),('95895001874'); @@ -2845,7 +2844,7 @@ Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two` from `tes 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 -2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; Using temporary Warnings: Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<expr_cache><`test`.`t1`.`two`,`test`.`t1`.`one`>(<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where (`test`.`t2`.`flag` = '0') group by `test`.`t2`.`one`,`test`.`t2`.`two` having (trigcond(((<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) or isnull(`test`.`t2`.`one`))) and trigcond(((<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`) or isnull(`test`.`t2`.`two`))) and trigcond(<is_not_null_test>(`test`.`t2`.`one`)) and trigcond(<is_not_null_test>(`test`.`t2`.`two`)))))) AS `test` from `test`.`t1` DROP TABLE t1,t2; @@ -3117,10 +3116,10 @@ SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 2), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); a -2 -4 1 +2 3 +4 SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 1), (SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b)); @@ -3129,8 +3128,8 @@ SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); a -2 1 +2 3 4 SELECT a FROM t1 @@ -3427,7 +3426,7 @@ 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 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary ALTER TABLE t1 ADD INDEX(a); SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a); a b @@ -3438,7 +3437,7 @@ 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 -2 DEPENDENT SUBQUERY t1 index NULL a 8 NULL 1 Using filesort +2 DEPENDENT SUBQUERY t1 index NULL a 8 NULL 1 DROP TABLE t1; create table t1( f1 int,f2 int); insert into t1 values (1,1),(2,2); @@ -4328,15 +4327,15 @@ 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 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,<exists>(select 1 from `test`.`t1` group by `test`.`t1`.`a` having 1))) +Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,<exists>(select 1 from `test`.`t1` group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(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 NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using where; Using temporary; Using filesort +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using where; Using temporary Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where <in_optimizer>(1,<exists>(select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` having 1)) +Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,<exists>(select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(1))))) DROP TABLE t1; # # Bug#45061: Incorrectly market field caused wrong result. @@ -5086,7 +5085,7 @@ WHERE ('0') IN ( SELECT a FROM t1 GROUP BY a ) GROUP BY b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary SELECT b FROM t1 WHERE ('0') IN ( SELECT a FROM t1 GROUP BY a ) GROUP BY b; @@ -5111,7 +5110,29 @@ SELECT 1 as foo FROM t1 WHERE a < SOME ); foo DROP TABLE t1; +# +# BUG#779885: Crash in eliminate_item_equal with materialization=on in +# maria-5.3 +# +CREATE TABLE t1 ( f1 int ); +INSERT INTO t1 VALUES (19), (20); +CREATE TABLE t2 ( f10 varchar(32) ); +INSERT INTO t2 VALUES ('c'),('d'); +CREATE TABLE t3 ( f10 varchar(32) ); +INSERT INTO t3 VALUES ('a'),('b'); +SELECT * +FROM t1 +WHERE +( 't' ) IN ( +SELECT t3.f10 +FROM t3 +JOIN t2 +ON t2.f10 = t3.f10 +); +f1 +DROP TABLE t1,t2,t3; +End of 5.3 tests set optimizer_switch=default; select @@optimizer_switch like '%materialization=on%'; @@optimizer_switch like '%materialization=on%' -1 +0 diff --git a/mysql-test/r/subselect_no_opts.result b/mysql-test/r/subselect_no_opts.result index 4cee8152006..d1aaebedcb5 100644 --- a/mysql-test/r/subselect_no_opts.result +++ b/mysql-test/r/subselect_no_opts.result @@ -274,7 +274,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`)))) select * from t3 where a >= all (select b from t2); a 7 @@ -424,7 +424,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where 1 +Note 1003 select 1 AS `1` from `test`.`t1` where (1 = (select 1 union select 1)) drop table t1; CREATE TABLE `t1` ( `numeropost` mediumint(8) unsigned NOT NULL auto_increment, @@ -512,7 +512,6 @@ ERROR 21000: Subquery returns more than 1 row show warnings; Level Code Message Error 1242 Subquery returns more than 1 row -Error 1028 Sort aborted drop table t1; create table t1 (a int); insert into t1 values (1),(2),(3); @@ -914,7 +913,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using where; Using index 2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` +Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`t2`.`a` from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` drop table t1,t2,t3; create table t1 (a float); select 10.5 IN (SELECT * from t1 LIMIT 1); @@ -1185,9 +1184,9 @@ SELECT 0 IN (SELECT 1 FROM t1 a); EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables Warnings: -Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)` +Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (<cache>(0) = 1))) AS `0 IN (SELECT 1 FROM t1 a)` INSERT INTO t1 (pseudo) VALUES ('test1'); SELECT 0 IN (SELECT 1 FROM t1 a); 0 IN (SELECT 1 FROM t1 a) @@ -1195,9 +1194,9 @@ SELECT 0 IN (SELECT 1 FROM t1 a); EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables Warnings: -Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)` +Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (<cache>(0) = 1))) AS `0 IN (SELECT 1 FROM t1 a)` drop table t1; CREATE TABLE `t1` ( `i` int(11) NOT NULL default '0', @@ -1325,7 +1324,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t1 eq_ref PRIMARY PRIMARY 4 func 1 100.00 Using where 2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index Warnings: -Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))))) +Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`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)); @@ -1368,7 +1367,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t1 ref a a 5 func 1001 100.00 Using index 2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 100.00 Using where; Using index; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))))) +Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))))) insert into t1 values (3,31); select * from t2 where t2.a in (select a from t1 where t1.b <> 30); a @@ -1508,7 +1507,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < (select max(NULL) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` < (select max(NULL) from `test`.`t2`)))) select * from t3 where a >= some (select b from t2); a explain extended select * from t3 where a >= some (select b from t2); @@ -1516,7 +1515,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(NULL) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= (select min(NULL) from `test`.`t2`)))) select * from t3 where a >= all (select b from t2 group by 1); a 6 @@ -1527,7 +1526,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < <max>(select NULL from `test`.`t2` group by 1))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` < <max>(select NULL from `test`.`t2` group by 1)))) select * from t3 where a >= some (select b from t2 group by 1); a explain extended select * from t3 where a >= some (select b from t2 group by 1); @@ -1535,39 +1534,39 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= <min>(select NULL from `test`.`t2` group by 1))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= <min>(select NULL from `test`.`t2` group by 1)))) select * from t3 where NULL >= any (select b from t2); a explain extended select * from t3 where NULL >= any (select b from t2); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= (select min(NULL) from `test`.`t2`)))) select * from t3 where NULL >= any (select b from t2 group by 1); a explain extended select * from t3 where NULL >= any (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= <min>(select NULL from `test`.`t2` group by 1)))) select * from t3 where NULL >= some (select b from t2); a explain extended select * from t3 where NULL >= some (select b from t2); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= (select min(NULL) from `test`.`t2`)))) select * from t3 where NULL >= some (select b from t2 group by 1); a explain extended select * from t3 where NULL >= some (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= <min>(select NULL from `test`.`t2` group by 1)))) insert into t2 values (2,2), (2,1), (3,3), (3,1); select * from t3 where a > all (select max(b) from t2 group by a); a @@ -1576,9 +1575,9 @@ a explain extended select * from t3 where a > all (select max(b) from t2 group by a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where -2 SUBQUERY t2 ALL NULL NULL NULL NULL 4 100.00 Using temporary; Using filesort +2 SUBQUERY t2 ALL NULL NULL NULL NULL 4 100.00 Using temporary Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`)))) drop table t2, t3; CREATE TABLE `t1` ( `id` mediumint(9) NOT NULL auto_increment, `taskid` bigint(20) NOT NULL default '0', `dbid` int(11) NOT NULL default '0', `create_date` datetime NOT NULL default '0000-00-00 00:00:00', `last_update` datetime NOT NULL default '0000-00-00 00:00:00', PRIMARY KEY (`id`)) ENGINE=MyISAM CHARSET=latin1 AUTO_INCREMENT=3 ; INSERT INTO `t1` (`id`, `taskid`, `dbid`, `create_date`,`last_update`) VALUES (1, 1, 15, '2003-09-29 10:31:36', '2003-09-29 10:31:36'), (2, 1, 21, now(), now()); @@ -1629,7 +1628,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 UNION t1 system NULL NULL NULL NULL 1 100.00 NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select 'e' AS `s1` from `test`.`t1` where 1 +Note 1003 select 'e' AS `s1` from `test`.`t1` where <nop>(<in_optimizer>('f',('f' > <min>(select 'e' from `test`.`t1` union select 'e' from `test`.`t1`)))) drop table t1; CREATE TABLE t1 (number char(11) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1; INSERT INTO t1 VALUES ('69294728265'),('18621828126'),('89356874041'),('95895001874'); @@ -2842,7 +2841,7 @@ Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two` from `tes 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 -2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; Using temporary Warnings: Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<expr_cache><`test`.`t1`.`two`,`test`.`t1`.`one`>(<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where (`test`.`t2`.`flag` = '0') group by `test`.`t2`.`one`,`test`.`t2`.`two` having (trigcond(((<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) or isnull(`test`.`t2`.`one`))) and trigcond(((<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`) or isnull(`test`.`t2`.`two`))) and trigcond(<is_not_null_test>(`test`.`t2`.`one`)) and trigcond(<is_not_null_test>(`test`.`t2`.`two`)))))) AS `test` from `test`.`t1` DROP TABLE t1,t2; @@ -3114,10 +3113,10 @@ SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 2), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); a -2 -4 1 +2 3 +4 SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 1), (SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b)); @@ -3126,8 +3125,8 @@ SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); a -2 1 +2 3 4 SELECT a FROM t1 @@ -3424,7 +3423,7 @@ 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 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary ALTER TABLE t1 ADD INDEX(a); SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a); a b @@ -3435,7 +3434,7 @@ 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 -2 DEPENDENT SUBQUERY t1 index NULL a 8 NULL 1 Using filesort +2 DEPENDENT SUBQUERY t1 index NULL a 8 NULL 1 DROP TABLE t1; create table t1( f1 int,f2 int); insert into t1 values (1,1),(2,2); @@ -4325,15 +4324,15 @@ 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 -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,<exists>(select 1 from `test`.`t1` group by `test`.`t1`.`a` having 1))) +Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,<exists>(select 1 from `test`.`t1` group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(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 NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using where; Using temporary; Using filesort +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using where; Using temporary Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where <in_optimizer>(1,<exists>(select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` having 1)) +Note 1003 select 1 AS `1` from `test`.`t1` where <expr_cache><1>(<in_optimizer>(1,<exists>(select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(1))))) DROP TABLE t1; # # Bug#45061: Incorrectly market field caused wrong result. @@ -5083,7 +5082,7 @@ WHERE ('0') IN ( SELECT a FROM t1 GROUP BY a ) GROUP BY b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary SELECT b FROM t1 WHERE ('0') IN ( SELECT a FROM t1 GROUP BY a ) GROUP BY b; @@ -5108,4 +5107,26 @@ SELECT 1 as foo FROM t1 WHERE a < SOME ); foo DROP TABLE t1; +# +# BUG#779885: Crash in eliminate_item_equal with materialization=on in +# maria-5.3 +# +CREATE TABLE t1 ( f1 int ); +INSERT INTO t1 VALUES (19), (20); +CREATE TABLE t2 ( f10 varchar(32) ); +INSERT INTO t2 VALUES ('c'),('d'); +CREATE TABLE t3 ( f10 varchar(32) ); +INSERT INTO t3 VALUES ('a'),('b'); +SELECT * +FROM t1 +WHERE +( 't' ) IN ( +SELECT t3.f10 +FROM t3 +JOIN t2 +ON t2.f10 = t3.f10 +); +f1 +DROP TABLE t1,t2,t3; +End of 5.3 tests set optimizer_switch=default; diff --git a/mysql-test/r/subselect_no_semijoin.result b/mysql-test/r/subselect_no_semijoin.result index 8c00fe67448..1d25894c8ce 100644 --- a/mysql-test/r/subselect_no_semijoin.result +++ b/mysql-test/r/subselect_no_semijoin.result @@ -274,7 +274,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`)))) select * from t3 where a >= all (select b from t2); a 7 @@ -424,7 +424,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where 1 +Note 1003 select 1 AS `1` from `test`.`t1` where (1 = (select 1 union select 1)) drop table t1; CREATE TABLE `t1` ( `numeropost` mediumint(8) unsigned NOT NULL auto_increment, @@ -512,7 +512,6 @@ ERROR 21000: Subquery returns more than 1 row show warnings; Level Code Message Error 1242 Subquery returns more than 1 row -Error 1028 Sort aborted drop table t1; create table t1 (a int); insert into t1 values (1),(2),(3); @@ -914,7 +913,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using where; Using index 2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` +Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`t2`.`a` from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` drop table t1,t2,t3; create table t1 (a float); select 10.5 IN (SELECT * from t1 LIMIT 1); @@ -1185,9 +1184,9 @@ SELECT 0 IN (SELECT 1 FROM t1 a); EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables Warnings: -Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)` +Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (<cache>(0) = 1))) AS `0 IN (SELECT 1 FROM t1 a)` INSERT INTO t1 (pseudo) VALUES ('test1'); SELECT 0 IN (SELECT 1 FROM t1 a); 0 IN (SELECT 1 FROM t1 a) @@ -1195,9 +1194,9 @@ SELECT 0 IN (SELECT 1 FROM t1 a); EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables Warnings: -Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)` +Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (<cache>(0) = 1))) AS `0 IN (SELECT 1 FROM t1 a)` drop table t1; CREATE TABLE `t1` ( `i` int(11) NOT NULL default '0', @@ -1302,9 +1301,9 @@ a explain extended select * from t2 where t2.a in (select a from t1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index NULL PRIMARY 4 NULL 4 100.00 Using where; Using index -2 SUBQUERY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index +2 DEPENDENT SUBQUERY t1 unique_subquery PRIMARY PRIMARY 4 func 1 100.00 Using index Warnings: -Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,`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`,<exists>(<primary_index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on PRIMARY)))) select * from t2 where t2.a in (select a from t1 where t1.b <> 30); a 2 @@ -1312,9 +1311,9 @@ a explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index NULL PRIMARY 4 NULL 4 100.00 Using where; Using index -2 SUBQUERY t1 ALL NULL NULL NULL NULL 4 100.00 Using where +2 DEPENDENT SUBQUERY t1 unique_subquery PRIMARY PRIMARY 4 func 1 100.00 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`,<exists>(<primary_index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on PRIMARY where ((`test`.`t1`.`b` <> 30) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`)))))) select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); a 2 @@ -1322,10 +1321,10 @@ a explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index NULL PRIMARY 4 NULL 4 100.00 Using where; Using index -2 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) +2 DEPENDENT SUBQUERY t1 eq_ref PRIMARY PRIMARY 4 func 1 100.00 Using where +2 DEPENDENT SUBQUERY t3 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index Warnings: -Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,`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`,<exists>(select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`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)); @@ -1345,9 +1344,9 @@ a explain extended select * from t2 where t2.a in (select a from t1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index NULL a 5 NULL 4 100.00 Using where; Using index -2 SUBQUERY t1 index NULL a 10 NULL 10004 100.00 Using index +2 DEPENDENT SUBQUERY t1 index_subquery a a 5 func 1001 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`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a)))) select * from t2 where t2.a in (select a from t1 where t1.b <> 30); a 2 @@ -1355,9 +1354,9 @@ a explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index 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 +2 DEPENDENT SUBQUERY t1 index_subquery a a 5 func 1001 100.00 Using index; 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`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a where ((`test`.`t1`.`b` <> 30) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`)))))) select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); a 2 @@ -1365,10 +1364,10 @@ a explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index NULL a 5 NULL 4 100.00 Using where; Using index -2 SUBQUERY t3 index a a 5 NULL 3 100.00 Using index -2 SUBQUERY t1 index NULL a 10 NULL 10004 100.00 Using where; Using index; Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY t1 ref a a 5 func 1001 100.00 Using index +2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 100.00 Using where; Using index; Using join buffer (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`,<exists>(select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))))) insert into t1 values (3,31); select * from t2 where t2.a in (select a from t1 where t1.b <> 30); a @@ -1382,9 +1381,9 @@ a explain extended select * from t2 where t2.a in (select a from t1 where t1.b <> 30); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index 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 +2 DEPENDENT SUBQUERY t1 index_subquery a a 5 func 1001 100.00 Using index; 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`,<exists>(<index_lookup>(<cache>(`test`.`t2`.`a`) in t1 on a where ((`test`.`t1`.`b` <> 30) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`)))))) drop table t0, t1, t2, t3; create table t1 (a int, b int); create table t2 (a int, b int); @@ -1508,7 +1507,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < (select max(NULL) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` < (select max(NULL) from `test`.`t2`)))) select * from t3 where a >= some (select b from t2); a explain extended select * from t3 where a >= some (select b from t2); @@ -1516,7 +1515,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(NULL) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= (select min(NULL) from `test`.`t2`)))) select * from t3 where a >= all (select b from t2 group by 1); a 6 @@ -1527,7 +1526,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < <max>(select NULL from `test`.`t2` group by 1))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` < <max>(select NULL from `test`.`t2` group by 1)))) select * from t3 where a >= some (select b from t2 group by 1); a explain extended select * from t3 where a >= some (select b from t2 group by 1); @@ -1535,39 +1534,39 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= <min>(select NULL from `test`.`t2` group by 1))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= <min>(select NULL from `test`.`t2` group by 1)))) select * from t3 where NULL >= any (select b from t2); a explain extended select * from t3 where NULL >= any (select b from t2); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= (select min(NULL) from `test`.`t2`)))) select * from t3 where NULL >= any (select b from t2 group by 1); a explain extended select * from t3 where NULL >= any (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= <min>(select NULL from `test`.`t2` group by 1)))) select * from t3 where NULL >= some (select b from t2); a explain extended select * from t3 where NULL >= some (select b from t2); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= (select min(NULL) from `test`.`t2`)))) select * from t3 where NULL >= some (select b from t2 group by 1); a explain extended select * from t3 where NULL >= some (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 system NULL NULL NULL NULL 0 0.00 const row not found Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= <min>(select NULL from `test`.`t2` group by 1)))) insert into t2 values (2,2), (2,1), (3,3), (3,1); select * from t3 where a > all (select max(b) from t2 group by a); a @@ -1576,9 +1575,9 @@ a explain extended select * from t3 where a > all (select max(b) from t2 group by a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where -2 SUBQUERY t2 ALL NULL NULL NULL NULL 4 100.00 Using temporary; Using filesort +2 SUBQUERY t2 ALL NULL NULL NULL NULL 4 100.00 Using temporary Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`)))) drop table t2, t3; CREATE TABLE `t1` ( `id` mediumint(9) NOT NULL auto_increment, `taskid` bigint(20) NOT NULL default '0', `dbid` int(11) NOT NULL default '0', `create_date` datetime NOT NULL default '0000-00-00 00:00:00', `last_update` datetime NOT NULL default '0000-00-00 00:00:00', PRIMARY KEY (`id`)) ENGINE=MyISAM CHARSET=latin1 AUTO_INCREMENT=3 ; INSERT INTO `t1` (`id`, `taskid`, `dbid`, `create_date`,`last_update`) VALUES (1, 1, 15, '2003-09-29 10:31:36', '2003-09-29 10:31:36'), (2, 1, 21, now(), now()); @@ -1629,7 +1628,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 UNION t1 system NULL NULL NULL NULL 1 100.00 NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select 'e' AS `s1` from `test`.`t1` where 1 +Note 1003 select 'e' AS `s1` from `test`.`t1` where <nop>(<in_optimizer>('f',('f' > <min>(select 'e' from `test`.`t1` union select 'e' from `test`.`t1`)))) drop table t1; CREATE TABLE t1 (number char(11) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1; INSERT INTO t1 VALUES ('69294728265'),('18621828126'),('89356874041'),('95895001874'); @@ -2836,13 +2835,13 @@ 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 Using where -2 SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where +2 DEPENDENT 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`),<exists>(select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where ((`test`.`t2`.`flag` = 'N') and (<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) and (<cache>(`test`.`t1`.`two`) = `test`.`t2`.`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 -2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; Using temporary Warnings: Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<expr_cache><`test`.`t1`.`two`,`test`.`t1`.`one`>(<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where (`test`.`t2`.`flag` = '0') group by `test`.`t2`.`one`,`test`.`t2`.`two` having (trigcond(((<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) or isnull(`test`.`t2`.`one`))) and trigcond(((<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`) or isnull(`test`.`t2`.`two`))) and trigcond(<is_not_null_test>(`test`.`t2`.`one`)) and trigcond(<is_not_null_test>(`test`.`t2`.`two`)))))) AS `test` from `test`.`t1` DROP TABLE t1,t2; @@ -3114,10 +3113,10 @@ SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 2), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); a -2 -4 1 +2 3 +4 SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 1), (SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b)); @@ -3126,8 +3125,8 @@ SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); a -2 1 +2 3 4 SELECT a FROM t1 @@ -3424,7 +3423,7 @@ 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary ALTER TABLE t1 ADD INDEX(a); SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a); a b @@ -3435,7 +3434,7 @@ 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 index NULL a 8 NULL 1 DROP TABLE t1; create table t1( f1 int,f2 int); insert into t1 values (1,1),(2,2); @@ -4205,7 +4204,7 @@ CREATE INDEX I2 ON t1 (b); EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where -2 SUBQUERY t1 index NULL I1 2 NULL 2 Using index +2 DEPENDENT SUBQUERY t1 index_subquery I1 I1 2 func 2 Using index; Using where SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1); a b CREATE TABLE t2 (a VARCHAR(1), b VARCHAR(10)); @@ -4215,14 +4214,14 @@ CREATE INDEX I2 ON t2 (b); EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where -2 SUBQUERY t2 index NULL I1 4 NULL 2 Using index +2 DEPENDENT SUBQUERY t2 index_subquery I1 I1 4 func 2 Using index; Using where SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2); a b EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where -2 SUBQUERY t1 index NULL I1 2 NULL 2 Using where; Using index +2 DEPENDENT SUBQUERY t1 index_subquery I1 I1 2 func 2 Using index; Using where SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500); a b DROP TABLE t1,t2; @@ -4324,16 +4323,16 @@ 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary 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,<exists>(select 1 from `test`.`t1` group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(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 +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using where; Using temporary 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,<exists>(select 1 from `test`.`t1` where (`test`.`t1`.`a` > 3) group by `test`.`t1`.`a` having (<cache>(1) = <ref_null_helper>(1))))) DROP TABLE t1; # # Bug#45061: Incorrectly market field caused wrong result. @@ -5018,8 +5017,8 @@ 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 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) +2 DEPENDENT SUBQUERY it2 ALL NULL NULL NULL NULL 4 Using where +2 DEPENDENT SUBQUERY it3 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) DROP TABLE IF EXISTS ot1, ot4, it2, it3; # # Bug#729039: NULL keys used to evaluate subquery @@ -5063,8 +5062,8 @@ INSERT INTO t2 VALUES (15,4); EXPLAIN SELECT * FROM t1 WHERE pk IN (SELECT it.pk FROM t2 JOIN t2 AS it ON 1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where -2 SUBQUERY t2 index NULL PRIMARY 4 NULL 3 Using index -2 SUBQUERY it index NULL PRIMARY 4 NULL 3 Using index; Using join buffer (flat, BNL join) +2 DEPENDENT SUBQUERY t2 index NULL PRIMARY 4 NULL 3 Using index +2 DEPENDENT SUBQUERY it eq_ref PRIMARY PRIMARY 4 func 1 Using index SELECT * FROM t1 WHERE pk IN (SELECT it.pk FROM t2 JOIN t2 AS it ON 1); pk i 11 0 @@ -5083,7 +5082,7 @@ WHERE ('0') IN ( SELECT a FROM t1 GROUP BY a ) GROUP BY b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort -2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary SELECT b FROM t1 WHERE ('0') IN ( SELECT a FROM t1 GROUP BY a ) GROUP BY b; @@ -5108,4 +5107,26 @@ SELECT 1 as foo FROM t1 WHERE a < SOME ); foo DROP TABLE t1; +# +# BUG#779885: Crash in eliminate_item_equal with materialization=on in +# maria-5.3 +# +CREATE TABLE t1 ( f1 int ); +INSERT INTO t1 VALUES (19), (20); +CREATE TABLE t2 ( f10 varchar(32) ); +INSERT INTO t2 VALUES ('c'),('d'); +CREATE TABLE t3 ( f10 varchar(32) ); +INSERT INTO t3 VALUES ('a'),('b'); +SELECT * +FROM t1 +WHERE +( 't' ) IN ( +SELECT t3.f10 +FROM t3 +JOIN t2 +ON t2.f10 = t3.f10 +); +f1 +DROP TABLE t1,t2,t3; +End of 5.3 tests set optimizer_switch=default; diff --git a/mysql-test/r/subselect_sj.result b/mysql-test/r/subselect_sj.result index 1fc5955f493..30a42b0c8e7 100644 --- a/mysql-test/r/subselect_sj.result +++ b/mysql-test/r/subselect_sj.result @@ -406,24 +406,6 @@ SELECT t1 .varchar_key from t1 int_key 9 7 -SELECT t0.int_key -FROM t0 -WHERE t0.varchar_nokey IN ( -SELECT t1_1 .varchar_key -FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key -); -int_key -9 -7 -SELECT t0.int_key -FROM t0, t2 -WHERE t0.varchar_nokey IN ( -SELECT t1_1 .varchar_key -FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key -); -int_key -9 -7 DROP TABLE t0, t1, t2; # End of bug#46550 # @@ -774,11 +756,11 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 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`))))))) +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 `test`.`t3`.`e` from `test`.`t3` where ((`test`.`t1`.`b` = `test`.`t3`.`e`) and (<cache>(`test`.`t2`.`d`) >= `test`.`t3`.`e`))))))) show warnings; Level Code Message 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`))))))) +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 `test`.`t3`.`e` 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 @@ -811,10 +793,9 @@ 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 -2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Rowid-ordered scan +1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1) Warnings: -Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`pk` > 0)) +Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0); pk 2 @@ -980,10 +961,9 @@ 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 -2 SUBQUERY t1 ALL varchar_key NULL NULL NULL 15 100.00 Using where +1 PRIMARY t1 ref varchar_key varchar_key 3 test.t2.varchar_nokey 2 105.00 Using where; FirstMatch(t2) 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`)) +Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_key` = `test`.`t2`.`varchar_nokey`) and (`test`.`t1`.`varchar_nokey` = `test`.`t2`.`varchar_nokey`) and ((`test`.`t2`.`varchar_nokey` < 'n') xor `test`.`t1`.`pk`)) SELECT varchar_nokey FROM t2 WHERE ( `varchar_nokey` , `varchar_nokey` ) IN ( @@ -1061,11 +1041,9 @@ WHERE t2.val LIKE 'a%' OR t2.val LIKE 'e%') 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 -3 SUBQUERY t3 ALL NULL NULL NULL NULL 5 Using where -2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Start temporary +1 PRIMARY t3 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) +1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (flat, BNL join) SELECT * FROM t1 WHERE t1.val IN (SELECT t2.val FROM t2 diff --git a/mysql-test/r/subselect_sj2.result b/mysql-test/r/subselect_sj2.result index 56c0f45ea1d..064ec3f6dfc 100644 --- a/mysql-test/r/subselect_sj2.result +++ b/mysql-test/r/subselect_sj2.result @@ -32,9 +32,8 @@ 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 t2 ref b b 5 test.t1.a 2 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Start temporary +1 PRIMARY t2 ref b b 5 test.t1.a 2 End temporary select * from t2 where b in (select a from t1); a b 1 1 @@ -51,9 +50,8 @@ primary key(pk1, pk2, pk3) 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Start temporary +1 PRIMARY t3 ref b b 5 test.t1.a 1 End temporary select * from t3 where b in (select a from t1); a b pk1 pk2 pk3 1 1 1 1 1 @@ -75,9 +73,8 @@ 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 t3 ref b b 5 test.t0.a 1 -2 SUBQUERY t0 ALL NULL NULL NULL NULL 10 Using where +1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Using where; Start temporary +1 PRIMARY t3 ref b b 5 test.t0.a 1 End temporary set @save_ecp= @@engine_condition_pushdown; set engine_condition_pushdown=0; select * from t3 where b in (select A.a+B.a from t0 A, t0 B where B.a<5); @@ -101,9 +98,8 @@ set join_buffer_size= @save_join_buffer_size; 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 -2 SUBQUERY t2 index b b 5 NULL 10 Using index +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +1 PRIMARY t2 ref b b 5 test.t1.a 2 Using index; FirstMatch(t1) select * from t1; a b 1 1 @@ -130,9 +126,8 @@ 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 ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer (flat, BNL join) -2 SUBQUERY it ALL NULL NULL NULL NULL 22 +1 PRIMARY it ALL NULL NULL NULL NULL 22 Start temporary +1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; End temporary; Using join buffer (flat, BNL join) select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); @@ -164,8 +159,7 @@ 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 -2 SUBQUERY it ALL NULL NULL NULL NULL 32 +1 PRIMARY it ALL NULL NULL NULL NULL 32 Using where; FirstMatch(ot) select a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); @@ -198,9 +192,8 @@ 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 ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer (flat, BNL join) -2 SUBQUERY it ALL NULL NULL NULL NULL 22 +1 PRIMARY it ALL NULL NULL NULL NULL 22 Start temporary +1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; End temporary; Using join buffer (flat, BNL join) select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); @@ -232,8 +225,7 @@ 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 -2 SUBQUERY it ALL NULL NULL NULL NULL 52 +1 PRIMARY it ALL NULL NULL NULL NULL 52 Using where; FirstMatch(ot) select a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); @@ -349,8 +341,7 @@ 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 -2 SUBQUERY t2 ALL CountryCode NULL NULL NULL 545 Using where +1 PRIMARY t2 ref CountryCode CountryCode 3 test.t1.Code 18 Using where; FirstMatch(t1) SELECT Name FROM t1 WHERE t1.Code IN ( SELECT t2.CountryCode FROM t2 WHERE Population > 5000000); @@ -692,9 +683,8 @@ alter table t3 add primary key(id), add key(a); 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 -2 SUBQUERY t3 index a a 5 NULL 30000 Using index +1 PRIMARY t2 index a a 5 NULL 1000 Using where; Using index +1 PRIMARY t3 ref a a 5 test.t2.a 30 Using index; FirstMatch(t2) select count(a) from t2 where a in ( SELECT a FROM t3); count(a) 1000 diff --git a/mysql-test/r/subselect_sj2_jcl6.result b/mysql-test/r/subselect_sj2_jcl6.result index 31da487158e..7b3b31b66fc 100644 --- a/mysql-test/r/subselect_sj2_jcl6.result +++ b/mysql-test/r/subselect_sj2_jcl6.result @@ -39,9 +39,8 @@ 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 t2 ref b b 5 test.t1.a 2 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan -2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Start temporary +1 PRIMARY t2 ref b b 5 test.t1.a 2 End temporary; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan select * from t2 where b in (select a from t1); a b 1 1 @@ -58,9 +57,8 @@ primary key(pk1, pk2, pk3) 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Start temporary +1 PRIMARY t3 ref b b 5 test.t1.a 1 End temporary; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan select * from t3 where b in (select a from t1); a b pk1 pk2 pk3 1 1 1 1 1 @@ -82,9 +80,8 @@ 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 t3 ref b b 5 test.t0.a 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan -2 SUBQUERY t0 ALL NULL NULL NULL NULL 10 Using where +1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Using where; Start temporary +1 PRIMARY t3 ref b b 5 test.t0.a 1 End temporary; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan set @save_ecp= @@engine_condition_pushdown; set engine_condition_pushdown=0; select * from t3 where b in (select A.a+B.a from t0 A, t0 B where B.a<5); @@ -108,9 +105,8 @@ set join_buffer_size= @save_join_buffer_size; 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 -2 SUBQUERY t2 index b b 5 NULL 10 Using index +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +1 PRIMARY t2 ref b b 5 test.t1.a 2 Using index; FirstMatch(t1) select * from t1; a b 1 1 @@ -137,9 +133,8 @@ 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 ot hash_ALL NULL #hash#$hj 5 test.it.a 32 Using where; Using join buffer (flat, BNLH join) -2 SUBQUERY it ALL NULL NULL NULL NULL 22 Using where +1 PRIMARY it ALL NULL NULL NULL NULL 22 Using where; Start temporary +1 PRIMARY ot hash_ALL NULL #hash#$hj 5 test.it.a 32 Using where; End temporary; Using join buffer (flat, BNLH join) select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); @@ -171,8 +166,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY ot ALL NULL NULL NULL NULL 22 -1 PRIMARY subselect2 eq_ref unique_key unique_key 5 func 1 -2 SUBQUERY it ALL NULL NULL NULL NULL 32 +1 PRIMARY it ALL NULL NULL NULL NULL 32 Using where; FirstMatch(ot); Using join buffer (flat, BNL join) select a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); @@ -196,8 +190,8 @@ a mid(filler1, 1,10) length(filler1)=length(filler2) 16 filler1234 1 17 filler1234 1 18 filler1234 1 -19 filler1234 1 3 duplicate 1 +19 filler1234 1 19 duplicate 1 insert into t1 select a+20, 'filler123456', 'filler123456' from t0; insert into t1 select a+20, 'filler123456', 'filler123456' from t0; @@ -205,9 +199,8 @@ explain select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22 -1 PRIMARY ot hash_ALL NULL #hash#$hj 5 test.it.a 52 Using where; Using join buffer (flat, BNLH join) -2 SUBQUERY it ALL NULL NULL NULL NULL 22 Using where +1 PRIMARY it ALL NULL NULL NULL NULL 22 Using where; Start temporary +1 PRIMARY ot hash_ALL NULL #hash#$hj 5 test.it.a 52 Using where; End temporary; Using join buffer (flat, BNLH join) select a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z from t1 ot where a in (select a from t2 it); @@ -239,8 +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 -2 SUBQUERY it ALL NULL NULL NULL NULL 52 +1 PRIMARY it ALL NULL NULL NULL NULL 52 Using where; FirstMatch(ot); Using join buffer (flat, BNL join) select a, mid(filler1, 1,10), length(filler1)=length(filler2) from t2 ot where a in (select a from t1 it); @@ -264,8 +256,8 @@ a mid(filler1, 1,10) length(filler1)=length(filler2) 16 filler1234 1 17 filler1234 1 18 filler1234 1 -19 filler1234 1 3 duplicate 1 +19 filler1234 1 19 duplicate 1 drop table t1, t2; create table t1 (a int, b int, key(a)); @@ -356,8 +348,7 @@ 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 -2 SUBQUERY t2 ALL CountryCode NULL NULL NULL 545 Using where +1 PRIMARY t2 ref CountryCode CountryCode 3 test.t1.Code 18 Using where; FirstMatch(t1); Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan SELECT Name FROM t1 WHERE t1.Code IN ( SELECT t2.CountryCode FROM t2 WHERE Population > 5000000); @@ -701,9 +692,8 @@ alter table t3 add primary key(id), add key(a); 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 -2 SUBQUERY t3 index a a 5 NULL 30000 Using index +1 PRIMARY t2 index a a 5 NULL 1000 Using where; Using index +1 PRIMARY t3 ref a a 5 test.t2.a 30 Using index; FirstMatch(t2) select count(a) from t2 where a in ( SELECT a FROM t3); count(a) 1000 diff --git a/mysql-test/r/subselect_sj2_mat.result b/mysql-test/r/subselect_sj2_mat.result new file mode 100644 index 00000000000..c54f1e9fd6b --- /dev/null +++ b/mysql-test/r/subselect_sj2_mat.result @@ -0,0 +1,731 @@ +set optimizer_switch='materialization=on'; +drop table if exists t0, t1, t2, t3; +drop view if exists v1; +create table t0 (a int); +insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); +create table t1 ( +a int, +b int +); +insert into t1 values (1,1),(1,1),(2,2); +create table t2 ( +a int, +b int, +key(b) +); +insert into t2 select a, a/2 from t0; +select * from t1; +a b +1 1 +1 1 +2 2 +select * from t2; +a b +0 0 +1 1 +2 1 +3 2 +4 2 +5 3 +6 3 +7 4 +8 4 +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 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); +a b +1 1 +2 1 +3 2 +4 2 +create table t3 ( +a int, +b int, +key(b), +pk1 char(200), pk2 char(200), pk3 char(200), +primary key(pk1, pk2, pk3) +) engine=innodb; +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 +2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 +select * from t3 where b in (select a from t1); +a b pk1 pk2 pk3 +1 1 1 1 1 +2 2 2 2 2 +set @save_max_heap_table_size= @@max_heap_table_size; +set max_heap_table_size=16384; +set @save_join_buffer_size = @@join_buffer_size; +set join_buffer_size= 8000; +drop table t3; +create table t3 ( +a int, +b int, +key(b), +pk1 char(200), pk2 char(200), +primary key(pk1, pk2) +) engine=innodb; +insert into t3 select +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 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; +set engine_condition_pushdown=0; +select * from t3 where b in (select A.a+B.a from t0 A, t0 B where B.a<5); +a b pk1 pk2 +0 0 0 0 +1 1 1 1 +2 2 2 2 +3 3 3 3 +4 4 4 4 +5 5 5 5 +6 6 6 6 +7 7 7 7 +8 8 8 8 +9 9 9 9 +10 10 10 10 +11 11 11 11 +12 12 12 12 +13 13 13 13 +set engine_condition_pushdown=@save_ecp; +set join_buffer_size= @save_join_buffer_size; +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 +2 SUBQUERY t2 index b b 5 NULL 10 Using index +select * from t1; +a b +1 1 +1 1 +2 2 +select * from t1 where a in (select b from t2); +a b +1 1 +1 1 +2 2 +drop table t1, t2, t3; +set @save_join_buffer_size = @@join_buffer_size; +set join_buffer_size= 8000; +create table t1 (a int, filler1 binary(200), filler2 binary(200)); +insert into t1 select a, 'filler123456', 'filler123456' from t0; +insert into t1 select a+10, 'filler123456', 'filler123456' from t0; +create table t2 as select * from t1; +insert into t1 select a+20, 'filler123456', 'filler123456' from t0; +insert into t1 values (2, 'duplicate ok', 'duplicate ok'); +insert into t1 values (18, 'duplicate ok', 'duplicate ok'); +insert into t2 values (3, 'duplicate ok', 'duplicate ok'); +insert into t2 values (19, 'duplicate ok', 'duplicate ok'); +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 ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer (flat, BNL join) +2 SUBQUERY it ALL NULL NULL NULL NULL 22 +select +a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z +from t1 ot where a in (select a from t2 it); +a mid(filler1, 1,10) Z +0 filler1234 1 +1 filler1234 1 +2 filler1234 1 +3 filler1234 1 +4 filler1234 1 +5 filler1234 1 +6 filler1234 1 +7 filler1234 1 +8 filler1234 1 +9 filler1234 1 +10 filler1234 1 +11 filler1234 1 +12 filler1234 1 +13 filler1234 1 +14 filler1234 1 +15 filler1234 1 +16 filler1234 1 +17 filler1234 1 +18 filler1234 1 +19 filler1234 1 +2 duplicate 1 +18 duplicate 1 +explain select +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 +2 SUBQUERY it ALL NULL NULL NULL NULL 32 +select +a, mid(filler1, 1,10), length(filler1)=length(filler2) +from t2 ot where a in (select a from t1 it); +a mid(filler1, 1,10) length(filler1)=length(filler2) +0 filler1234 1 +1 filler1234 1 +2 filler1234 1 +3 filler1234 1 +4 filler1234 1 +5 filler1234 1 +6 filler1234 1 +7 filler1234 1 +8 filler1234 1 +9 filler1234 1 +10 filler1234 1 +11 filler1234 1 +12 filler1234 1 +13 filler1234 1 +14 filler1234 1 +15 filler1234 1 +16 filler1234 1 +17 filler1234 1 +18 filler1234 1 +19 filler1234 1 +3 duplicate 1 +19 duplicate 1 +insert into t1 select a+20, 'filler123456', 'filler123456' from t0; +insert into t1 select a+20, 'filler123456', 'filler123456' from t0; +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 ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer (flat, BNL join) +2 SUBQUERY it ALL NULL NULL NULL NULL 22 +select +a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z +from t1 ot where a in (select a from t2 it); +a mid(filler1, 1,10) Z +0 filler1234 1 +1 filler1234 1 +2 filler1234 1 +3 filler1234 1 +4 filler1234 1 +5 filler1234 1 +6 filler1234 1 +7 filler1234 1 +8 filler1234 1 +9 filler1234 1 +10 filler1234 1 +11 filler1234 1 +12 filler1234 1 +13 filler1234 1 +14 filler1234 1 +15 filler1234 1 +16 filler1234 1 +17 filler1234 1 +18 filler1234 1 +19 filler1234 1 +2 duplicate 1 +18 duplicate 1 +explain select +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 +2 SUBQUERY it ALL NULL NULL NULL NULL 52 +select +a, mid(filler1, 1,10), length(filler1)=length(filler2) +from t2 ot where a in (select a from t1 it); +a mid(filler1, 1,10) length(filler1)=length(filler2) +0 filler1234 1 +1 filler1234 1 +2 filler1234 1 +3 filler1234 1 +4 filler1234 1 +5 filler1234 1 +6 filler1234 1 +7 filler1234 1 +8 filler1234 1 +9 filler1234 1 +10 filler1234 1 +11 filler1234 1 +12 filler1234 1 +13 filler1234 1 +14 filler1234 1 +15 filler1234 1 +16 filler1234 1 +17 filler1234 1 +18 filler1234 1 +19 filler1234 1 +3 duplicate 1 +19 duplicate 1 +drop table t1, t2; +create table t1 (a int, b int, key(a)); +create table t2 (a int, b int, key(a)); +create table t3 (a int, b int, key(a)); +insert into t1 select a,a from t0; +insert into t2 select a,a from t0; +insert into t3 select a,a from t0; +t2 and t3 must be use 'ref', not 'ALL': +explain select * +from t0 where a in +(select t2.a+t3.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t0 ALL NULL NULL NULL NULL 10 Start temporary +1 PRIMARY t1 index NULL a 5 NULL 10 Using index; Using join buffer (flat, BNL join) +1 PRIMARY t2 ref a a 5 test.t1.a 1 Using where; Using index +1 PRIMARY t3 ref a a 5 test.t1.a 1 Using where; Using index; End temporary +drop table t0, t1,t2,t3; +CREATE TABLE t1 ( +ID int(11) NOT NULL auto_increment, +Name char(35) NOT NULL default '', +Country char(3) NOT NULL default '', +Population int(11) NOT NULL default '0', +PRIMARY KEY (ID), +INDEX (Population), +INDEX (Country) +); +CREATE TABLE t2 ( +Code char(3) NOT NULL default '', +Name char(52) NOT NULL default '', +SurfaceArea float(10,2) NOT NULL default '0.00', +Population int(11) NOT NULL default '0', +Capital int(11) default NULL, +PRIMARY KEY (Code), +UNIQUE INDEX (Name), +INDEX (Population) +); +CREATE TABLE t3 ( +Country char(3) NOT NULL default '', +Language char(30) NOT NULL default '', +Percentage float(3,1) NOT NULL default '0.0', +PRIMARY KEY (Country, Language), +INDEX (Percentage) +); +EXPLAIN +SELECT Name FROM t2 +WHERE t2.Code IN (SELECT Country FROM t1 WHERE Population > 5000000) +AND +t2.Code IN (SELECT Country FROM t3 +WHERE Language='English' AND Percentage > 10 AND +t2.Population > 100000); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 range Population,Country Population 4 NULL 1 Using index condition; Rowid-ordered scan +1 PRIMARY t3 eq_ref PRIMARY,Percentage PRIMARY 33 test.t1.Country,const 1 Using index condition; Using where +1 PRIMARY t2 eq_ref PRIMARY,Population PRIMARY 3 test.t1.Country 1 Using where +DROP TABLE t1,t2,t3; +CREATE TABLE t1 ( +Code char(3) NOT NULL DEFAULT '', +Name char(52) NOT NULL DEFAULT '', +Continent enum('Asia','Europe','North America','Africa','Oceania','Antarctica','South America') NOT NULL DEFAULT 'Asia', +Region char(26) NOT NULL DEFAULT '', +SurfaceArea float(10,2) NOT NULL DEFAULT '0.00', +IndepYear smallint(6) DEFAULT NULL, +Population int(11) NOT NULL DEFAULT '0', +LifeExpectancy float(3,1) DEFAULT NULL, +GNP float(10,2) DEFAULT NULL, +GNPOld float(10,2) DEFAULT NULL, +LocalName char(45) NOT NULL DEFAULT '', +GovernmentForm char(45) NOT NULL DEFAULT '', +HeadOfState char(60) DEFAULT NULL, +Capital int(11) DEFAULT NULL, +Code2 char(2) NOT NULL DEFAULT '', +PRIMARY KEY (Code) +); +CREATE TABLE t2 ( +ID int(11) NOT NULL AUTO_INCREMENT, +Name char(35) NOT NULL DEFAULT '', +CountryCode char(3) NOT NULL DEFAULT '', +District char(20) NOT NULL DEFAULT '', +Population int(11) NOT NULL DEFAULT '0', +PRIMARY KEY (ID), +KEY CountryCode (CountryCode) +); +Fill the table with test data +This must not use LooseScan: +EXPLAIN SELECT Name FROM t1 +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 +2 SUBQUERY t2 ALL CountryCode NULL NULL NULL 545 Using where +SELECT Name FROM t1 +WHERE t1.Code IN ( +SELECT t2.CountryCode FROM t2 WHERE Population > 5000000); +Name +Austria +Canada +China +Czech Republic +drop table t1, t2; +CREATE TABLE t1(a INT); +CREATE TABLE t2(c INT); +CREATE PROCEDURE p1(v1 int) +BEGIN +SELECT 1 FROM t1 WHERE a = v1 AND a IN (SELECT c FROM t2); +END +// +CREATE PROCEDURE p2(v1 int) +BEGIN +SELECT 1 FROM t1 WHERE a IN (SELECT c FROM t2); +END +// +CREATE PROCEDURE p3(v1 int) +BEGIN +SELECT 1 +FROM +t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08, +t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16, +t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24, +t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32, +t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40, +t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48, +t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56, +t1 t57,t1 t58,t1 t59,t1 t60 +WHERE t01.a IN (SELECT c FROM t2); +END +// +CREATE PROCEDURE p4(v1 int) +BEGIN +SELECT 1 +FROM +t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08, +t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16, +t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24, +t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32, +t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40, +t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48, +t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56, +t1 t57,t1 t58,t1 t59,t1 t60 +WHERE t01.a = v1 AND t01.a IN (SELECT c FROM t2); +END +// +CALL p1(1); +1 +CALL p2(1); +1 +CALL p3(1); +1 +CALL p4(1); +1 +DROP TABLE t1, t2; +DROP PROCEDURE p1; +DROP PROCEDURE p2; +DROP PROCEDURE p3; +DROP PROCEDURE p4; +create table t0 (a int); +insert into t0 values (0),(1),(2),(3),(4); +create table t1 (a int, b int, key(a)); +insert into t1 select a,a from t0; +create table t2 (a int, b int, primary key(a)); +insert into t2 select * from t1; +Table t2, unlike table t1, should be displayed as pulled out +explain extended select * from t0 +where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and +t1.b=t2.b); +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t0 ALL NULL NULL NULL NULL 5 100.00 Using where +1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Start temporary +1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 100.00 Using where; End temporary +Warnings: +Note 1276 Field or reference 'test.t0.a' of SELECT #2 was resolved in SELECT #1 +Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) join `test`.`t0` where ((`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t1`.`a` = `test`.`t0`.`a`) and (`test`.`t2`.`a` = `test`.`t0`.`a`)) +update t1 set a=3, b=11 where a=4; +update t2 set b=11 where a=3; +select * from t0 where t0.a in +(select t1.a from t1, t2 where t2.a=t0.a and t1.b=t2.b); +a +0 +1 +2 +3 +drop table t0, t1, t2; +CREATE TABLE t1 ( +id int(11) NOT NULL, +PRIMARY KEY (id)); +CREATE TABLE t2 ( +id int(11) NOT NULL, +fid int(11) NOT NULL, +PRIMARY KEY (id)); +insert into t1 values(1); +insert into t2 values(1,7503),(2,1); +explain select count(*) +from t1 +where fid IN (select fid from t2 where (id between 7502 and 8420) order by fid ); +ERROR 42S22: Unknown column 'fid' in 'IN/ALL/ANY subquery' +drop table t1, t2; +create table t1 (a int, b int, key (a), key (b)); +insert into t1 values (2,4),(2,4),(2,4); +select t1.a from t1 +where +t1.a in (select 1 from t1 where t1.a in (select 1 from t1) group by t1.a); +a +drop table t1; +create table t1(a int,b int,key(a),key(b)); +insert into t1 values (1,1),(2,2),(3,3); +select 1 from t1 +where t1.a not in (select 1 from t1 +where t1.a in (select 1 from t1) +group by t1.b); +1 +1 +1 +drop table t1; +CREATE TABLE t1 +(EMPNUM CHAR(3) NOT NULL, +EMPNAME CHAR(20), +GRADE DECIMAL(4), +CITY CHAR(15)); +CREATE TABLE t2 +(PNUM CHAR(3) NOT NULL, +PNAME CHAR(20), +PTYPE CHAR(6), +BUDGET DECIMAL(9), +CITY CHAR(15)); +CREATE TABLE t3 +(EMPNUM CHAR(3) NOT NULL, +PNUM CHAR(3) NOT NULL, +HOURS DECIMAL(5)); +INSERT INTO t1 VALUES ('E1','Alice',12,'Deale'); +INSERT INTO t1 VALUES ('E2','Betty',10,'Vienna'); +INSERT INTO t1 VALUES ('E3','Carmen',13,'Vienna'); +INSERT INTO t1 VALUES ('E4','Don',12,'Deale'); +INSERT INTO t1 VALUES ('E5','Ed',13,'Akron'); +INSERT INTO t2 VALUES ('P1','MXSS','Design',10000,'Deale'); +INSERT INTO t2 VALUES ('P2','CALM','Code',30000,'Vienna'); +INSERT INTO t2 VALUES ('P3','SDP','Test',30000,'Tampa'); +INSERT INTO t2 VALUES ('P4','SDP','Design',20000,'Deale'); +INSERT INTO t2 VALUES ('P5','IRM','Test',10000,'Vienna'); +INSERT INTO t2 VALUES ('P6','PAYR','Design',50000,'Deale'); +INSERT INTO t3 VALUES ('E1','P1',40); +INSERT INTO t3 VALUES ('E1','P2',20); +INSERT INTO t3 VALUES ('E1','P3',80); +INSERT INTO t3 VALUES ('E1','P4',20); +INSERT INTO t3 VALUES ('E1','P5',12); +INSERT INTO t3 VALUES ('E1','P6',12); +INSERT INTO t3 VALUES ('E2','P1',40); +INSERT INTO t3 VALUES ('E2','P2',80); +INSERT INTO t3 VALUES ('E3','P2',20); +INSERT INTO t3 VALUES ('E4','P2',20); +INSERT INTO t3 VALUES ('E4','P4',40); +INSERT INTO t3 VALUES ('E4','P5',80); +SELECT * FROM t1; +EMPNUM EMPNAME GRADE CITY +E1 Alice 12 Deale +E2 Betty 10 Vienna +E3 Carmen 13 Vienna +E4 Don 12 Deale +E5 Ed 13 Akron +CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM); +SELECT EMPNAME +FROM t1 +WHERE EMPNUM IN +(SELECT EMPNUM +FROM t3 +WHERE PNUM IN +(SELECT PNUM +FROM t2 +WHERE PTYPE = 'Design')); +EMPNAME +Alice +Betty +Don +DROP INDEX t1_IDX ON t1; +CREATE INDEX t1_IDX ON t1(EMPNUM); +SELECT EMPNAME +FROM t1 +WHERE EMPNUM IN +(SELECT EMPNUM +FROM t3 +WHERE PNUM IN +(SELECT PNUM +FROM t2 +WHERE PTYPE = 'Design')); +EMPNAME +Alice +Betty +Don +DROP INDEX t1_IDX ON t1; +SELECT EMPNAME +FROM t1 +WHERE EMPNUM IN +(SELECT EMPNUM +FROM t3 +WHERE PNUM IN +(SELECT PNUM +FROM t2 +WHERE PTYPE = 'Design')); +EMPNAME +Alice +Betty +Don +DROP TABLE t1, t2, t3; +CREATE TABLE t1 (f1 INT NOT NULL); +CREATE VIEW v1 (a) AS SELECT f1 IN (SELECT f1 FROM t1) FROM t1; +SELECT * FROM v1; +a +drop view v1; +drop table t1; +create table t0 (a int); +insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); +create table t1(a int, b int); +insert into t1 values (0,0),(1,1),(2,2); +create table t2 as select * from t1; +create table t3 (pk int, a int, primary key(pk)); +insert into t3 select a,a from t0; +explain +select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3)); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 +1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Using where +2 DEPENDENT SUBQUERY t3 unique_subquery PRIMARY PRIMARY 4 func 1 Using index +drop table t0, t1, t2, t3; +create table t1 (a int); +insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); +create table t2 (a char(200), b char(200), c char(200), primary key (a,b,c)) engine=innodb; +insert into t2 select concat(a, repeat('X',198)),repeat('B',200),repeat('B',200) from t1; +insert into t2 select concat(a, repeat('Y',198)),repeat('B',200),repeat('B',200) from t1; +alter table t2 add filler1 int; +insert into t1 select A.a + 10*(B.a + 10*C.a) from t1 A, t1 B, t1 C; +set @save_join_buffer_size=@@join_buffer_size; +set join_buffer_size=1; +select * from t2 where filler1 in ( select a from t1); +a b c filler1 +set join_buffer_size=default; +drop table t1, t2; +create table t1 (a int not null); +drop procedure if exists p1; +CREATE PROCEDURE p1() +BEGIN +DECLARE EXIT HANDLER FOR SQLEXCEPTION select a from t1; +prepare s1 from ' + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( + select a from t1 where a in ( select a from t1) + )))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))'; +execute s1; +END; +| +call p1(); +a +drop procedure p1; +drop table t1; +create table t0 (a int); +insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); +create table t1 (a int) as select A.a + 10 *(B.a + 10*C.a) as a from t0 A, t0 B, t0 C; +create table t2 (id int, a int, primary key(id), key(a)) as select a as id, a as a from t1; +show create table t2; +Table Create Table +t2 CREATE TABLE `t2` ( + `id` int(11) NOT NULL DEFAULT '0', + `a` int(11) DEFAULT NULL, + PRIMARY KEY (`id`), + KEY `a` (`a`) +) ENGINE=MyISAM DEFAULT CHARSET=latin1 +set @a=0; +create table t3 as select * from t2 limit 0; +insert into t3 select @a:=@a+1, t2.a from t2, t0; +insert into t3 select @a:=@a+1, t2.a from t2, t0; +insert into t3 select @a:=@a+1, t2.a from t2, t0; +alter table t3 add primary key(id), add key(a); +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 +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) +1000 +drop table t0,t1,t2,t3; + +BUG#42740: crash in optimize_semijoin_nests + +create table t1 (c6 timestamp,key (c6)) engine=innodb; +create table t2 (c2 double) engine=innodb; +explain select 1 from t2 where c2 = any (select log10(null) from t1 where c6 <null) ; +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 +drop table t1, t2; +# +# BUG#42742: crash in setup_sj_materialization, Copy_field::set +# +create table t3 ( c1 year) engine=innodb; +insert into t3 values (2135),(2142); +create table t2 (c1 tinytext,c2 text,c6 timestamp) engine=innodb; +# The following must not crash, EXPLAIN should show one SJ strategy, not a mix: +explain select 1 from t2 where +c2 in (select 1 from t3, t2) and +c1 in (select convert(c6,char(1)) from t2); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where +1 PRIMARY t2 ALL NULL NULL NULL NULL 1 +1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where +1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch(t2) +drop table t2, t3; +set optimizer_switch=default; +select @@optimizer_switch like '%materialization=on%'; +@@optimizer_switch like '%materialization=on%' +0 diff --git a/mysql-test/r/subselect_sj_jcl6.result b/mysql-test/r/subselect_sj_jcl6.result index 46ca02cd71a..0b3e9c6984e 100644 --- a/mysql-test/r/subselect_sj_jcl6.result +++ b/mysql-test/r/subselect_sj_jcl6.result @@ -414,24 +414,6 @@ SELECT t1 .varchar_key from t1 int_key 9 7 -SELECT t0.int_key -FROM t0 -WHERE t0.varchar_nokey IN ( -SELECT t1_1 .varchar_key -FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key -); -int_key -9 -7 -SELECT t0.int_key -FROM t0, t2 -WHERE t0.varchar_nokey IN ( -SELECT t1_1 .varchar_key -FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key -); -int_key -9 -7 DROP TABLE t0, t1, t2; # End of bug#46550 # @@ -782,11 +764,11 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 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`))))))) +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 `test`.`t3`.`e` from `test`.`t3` where ((`test`.`t1`.`b` = `test`.`t3`.`e`) and (<cache>(`test`.`t2`.`d`) >= `test`.`t3`.`e`))))))) show warnings; Level Code Message 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`))))))) +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 `test`.`t3`.`e` 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 @@ -819,10 +801,9 @@ 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 -2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Rowid-ordered scan +1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`pk` > 0)) +Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0); pk 2 @@ -988,10 +969,9 @@ 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 -2 SUBQUERY t1 ALL varchar_key NULL NULL NULL 15 100.00 Using where +1 PRIMARY t1 ref varchar_key varchar_key 3 test.t2.varchar_nokey 2 105.00 Using where; FirstMatch(t2); Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan 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`)) +Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_key` = `test`.`t2`.`varchar_nokey`) and (`test`.`t1`.`varchar_nokey` = `test`.`t2`.`varchar_nokey`) and ((`test`.`t2`.`varchar_nokey` < 'n') xor `test`.`t1`.`pk`)) SELECT varchar_nokey FROM t2 WHERE ( `varchar_nokey` , `varchar_nokey` ) IN ( @@ -1069,11 +1049,9 @@ WHERE t2.val LIKE 'a%' OR t2.val LIKE 'e%') 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 -3 SUBQUERY t3 ALL NULL NULL NULL NULL 5 Using where -2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where +1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Start temporary +1 PRIMARY t3 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) +1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (incremental, BNL join) SELECT * FROM t1 WHERE t1.val IN (SELECT t2.val FROM t2 diff --git a/mysql-test/r/union.result b/mysql-test/r/union.result index 4bb1346d2fb..ca08c7b60f3 100644 --- a/mysql-test/r/union.result +++ b/mysql-test/r/union.result @@ -1635,11 +1635,11 @@ ORDER BY (SELECT a FROM t2 WHERE b = 12); 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 2 UNION t1 ALL NULL NULL NULL NULL 2 100.00 -3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00 Using where NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL NULL Using filesort +3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: -Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #2 -Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` union select `test`.`t1`.`a` AS `a` from `test`.`t1` order by (select `test`.`t1`.`a` from `test`.`t2` where (`test`.`t2`.`b` = 12)) +Note 1276 Field or reference 'a' of SELECT #3 was resolved in SELECT #-1 +Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` union select `test`.`t1`.`a` AS `a` from `test`.`t1` order by (select `a` from `test`.`t2` where (`test`.`t2`.`b` = 12)) # Should not crash SELECT * FROM t1 UNION SELECT * FROM t1 ORDER BY (SELECT a FROM t2 WHERE b = 12); diff --git a/mysql-test/r/variables.result b/mysql-test/r/variables.result index 023ced5d914..890eb9fcc20 100644 --- a/mysql-test/r/variables.result +++ b/mysql-test/r/variables.result @@ -1569,7 +1569,7 @@ set sql_buffer_result=1; explain SELECT 1 as 'one' FROM t1 GROUP BY @a:= (SELECT ROUND(f1) FROM t1 WHERE f1 = 0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using temporary -2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where; Using temporary +2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where SELECT 1 as 'one' FROM t1 GROUP BY @a:= (SELECT ROUND(f1) FROM t1 WHERE f1 = 0); one 1 diff --git a/mysql-test/suite/innodb_plugin/r/group_commit_no_optimize_thread.result b/mysql-test/suite/innodb_plugin/r/group_commit_no_optimize_thread.result index 7c2636fb472..34a638da2d5 100644 --- a/mysql-test/suite/innodb_plugin/r/group_commit_no_optimize_thread.result +++ b/mysql-test/suite/innodb_plugin/r/group_commit_no_optimize_thread.result @@ -7,6 +7,7 @@ SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL group1_running WAI INSERT INTO t1 VALUES ("con1"); set DEBUG_SYNC= "now WAIT_FOR group1_running"; SET DEBUG_SYNC= "commit_after_prepare_ordered SIGNAL group2_con2"; +SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL group2_running"; SET DEBUG_SYNC= "commit_after_release_LOCK_log WAIT_FOR group3_committed"; INSERT INTO t1 VALUES ("con2"); SET DEBUG_SYNC= "now WAIT_FOR group2_con2"; @@ -26,6 +27,7 @@ a con1 SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL group3_con5"; SET DEBUG_SYNC= "commit_after_get_LOCK_log SIGNAL con5_leader WAIT_FOR con6_queued"; +set DEBUG_SYNC= "now WAIT_FOR group2_running"; INSERT INTO t1 VALUES ("con5"); SET DEBUG_SYNC= "now WAIT_FOR con5_leader"; SET DEBUG_SYNC= "commit_after_prepare_ordered SIGNAL con6_queued"; diff --git a/mysql-test/suite/innodb_plugin/t/group_commit_no_optimize_thread.test b/mysql-test/suite/innodb_plugin/t/group_commit_no_optimize_thread.test index ae3f1b516d4..a216cbd2965 100644 --- a/mysql-test/suite/innodb_plugin/t/group_commit_no_optimize_thread.test +++ b/mysql-test/suite/innodb_plugin/t/group_commit_no_optimize_thread.test @@ -37,6 +37,7 @@ send INSERT INTO t1 VALUES ("con1"); connection con2; set DEBUG_SYNC= "now WAIT_FOR group1_running"; SET DEBUG_SYNC= "commit_after_prepare_ordered SIGNAL group2_con2"; +SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL group2_running"; SET DEBUG_SYNC= "commit_after_release_LOCK_log WAIT_FOR group3_committed"; send INSERT INTO t1 VALUES ("con2"); connection con3; @@ -70,6 +71,7 @@ SELECT * FROM t1 ORDER BY a; connection con5; SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL group3_con5"; SET DEBUG_SYNC= "commit_after_get_LOCK_log SIGNAL con5_leader WAIT_FOR con6_queued"; +set DEBUG_SYNC= "now WAIT_FOR group2_running"; send INSERT INTO t1 VALUES ("con5"); connection con6; diff --git a/mysql-test/suite/pbxt/r/group_min_max.result b/mysql-test/suite/pbxt/r/group_min_max.result index e4ba16ce527..04f14a9f5e7 100644 --- a/mysql-test/suite/pbxt/r/group_min_max.result +++ b/mysql-test/suite/pbxt/r/group_min_max.result @@ -1364,7 +1364,7 @@ explain select a1,a2,b,min(c),max(c) from t1 where exists ( select * from t2 where t2.c > 'b1' ) group by a1,a2,b; id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t1 range NULL idx_t1_1 147 NULL 129 Using index for group-by +1 PRIMARY t1 range NULL idx_t1_1 147 NULL 129 Using where; Using index for group-by 2 SUBQUERY t2 index NULL idx_t2_1 163 NULL 164 Using where; Using index explain select a1,a2,b,min(c),max(c) from t1 where (a1 >= 'c' or a2 < 'b') and (b > 'a') group by a1,a2,b; id select_type table type possible_keys key key_len ref rows Extra @@ -2247,17 +2247,17 @@ EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE EXISTS (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 index -2 SUBQUERY t1 index NULL a 10 NULL 15 Using index +2 SUBQUERY t1 index NULL a 10 NULL 1 Using index EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12; id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t1_outer index NULL a 10 NULL 15 Using index 2 SUBQUERY t1 index NULL a 10 NULL 15 Using index 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 -2 SUBQUERY t1 index NULL a 10 NULL 15 Using index +2 DEPENDENT SUBQUERY t1 index NULL a 10 NULL 1 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); id select_type table type possible_keys key key_len ref rows Extra diff --git a/mysql-test/suite/pbxt/r/join_nested.result b/mysql-test/suite/pbxt/r/join_nested.result index d6c4b9a7322..b4edf18f2f5 100644 --- a/mysql-test/suite/pbxt/r/join_nested.result +++ b/mysql-test/suite/pbxt/r/join_nested.result @@ -854,7 +854,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 1 100.00 Using where 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Warnings: -Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on((((`test`.`t3`.`a` = 1) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`))) and (`test`.`t3`.`b` is not null))) where 1 +Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`) and (`test`.`t3`.`b` is not null))) where 1 SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b FROM (t3,t4) LEFT JOIN @@ -966,7 +966,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t3`.`b` = `test`.`t4`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) +Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t5`.`b` = `test`.`t0`.`b`)) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t3`.`b` = `test`.`t4`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) CREATE INDEX idx_b ON t8(b); EXPLAIN SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, diff --git a/mysql-test/suite/pbxt/r/ps_11bugs.result b/mysql-test/suite/pbxt/r/ps_11bugs.result index fad35b97b24..dd09e9d14f3 100644 --- a/mysql-test/suite/pbxt/r/ps_11bugs.result +++ b/mysql-test/suite/pbxt/r/ps_11bugs.result @@ -120,9 +120,9 @@ create table t1 (a int primary key); insert into t1 values (1); explain select * from t1 where 3 in (select (1+1) union select 1); id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible HAVING -3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL Impossible HAVING +1 PRIMARY t1 index NULL PRIMARY 4 NULL 1 Using index +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +3 DEPENDENT UNION NULL NULL NULL NULL NULL NULL NULL No tables used NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL select * from t1 where 3 in (select (1+1) union select 1); a diff --git a/mysql-test/suite/pbxt/r/subselect.result b/mysql-test/suite/pbxt/r/subselect.result index 42b3a097b8a..daa13af72bc 100644 --- a/mysql-test/suite/pbxt/r/subselect.result +++ b/mysql-test/suite/pbxt/r/subselect.result @@ -270,7 +270,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`)))) select * from t3 where a >= all (select b from t2); a 7 @@ -420,7 +420,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 UNION NULL NULL NULL NULL NULL NULL NULL NULL No tables used NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select 1 AS `1` from `test`.`t1` where 1 +Note 1003 select 1 AS `1` from `test`.`t1` where (1 = (select 1 union select 1)) drop table t1; CREATE TABLE `t1` ( `numeropost` mediumint(8) unsigned NOT NULL auto_increment, @@ -908,7 +908,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using where; Using index 2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: -Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` +Note 1003 select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,<exists>(select `test`.`t2`.`a` from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` drop table t1,t2,t3; create table t1 (a float); select 10.5 IN (SELECT * from t1 LIMIT 1); @@ -1179,9 +1179,9 @@ SELECT 0 IN (SELECT 1 FROM t1 a); EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables Warnings: -Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)` +Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (<cache>(0) = 1))) AS `0 IN (SELECT 1 FROM t1 a)` INSERT INTO t1 (pseudo) VALUES ('test1'); SELECT 0 IN (SELECT 1 FROM t1 a); 0 IN (SELECT 1 FROM t1 a) @@ -1189,9 +1189,9 @@ SELECT 0 IN (SELECT 1 FROM t1 a); EXPLAIN EXTENDED SELECT 0 IN (SELECT 1 FROM t1 a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL No tables used -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables Warnings: -Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)` +Note 1003 select <in_optimizer>(0,<exists>(select 1 from `test`.`t1` `a` where (<cache>(0) = 1))) AS `0 IN (SELECT 1 FROM t1 a)` drop table t1; CREATE TABLE `t1` ( `i` int(11) NOT NULL default '0', @@ -1498,7 +1498,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < (select max(`test`.`t2`.`b`) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` < (select max(`test`.`t2`.`b`) from `test`.`t2`)))) select * from t3 where a >= some (select b from t2); a explain extended select * from t3 where a >= some (select b from t2); @@ -1506,7 +1506,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where 2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= (select min(`test`.`t2`.`b`) from `test`.`t2`)))) select * from t3 where a >= all (select b from t2 group by 1); a 6 @@ -1515,49 +1515,49 @@ a explain extended select * from t3 where a >= all (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where -2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Using temporary; Using filesort +2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Using temporary Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` < <max>(select `test`.`t2`.`b` from `test`.`t2` group by 1))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` < <max>(select `test`.`t2`.`b` from `test`.`t2` group by 1)))) select * from t3 where a >= some (select b from t2 group by 1); a explain extended select * from t3 where a >= some (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where -2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Using temporary; Using filesort +2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Using temporary Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>((`test`.`t3`.`a` >= <min>(select `test`.`t2`.`b` from `test`.`t2` group by 1))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` >= <min>(select `test`.`t2`.`b` from `test`.`t2` group by 1)))) select * from t3 where NULL >= any (select b from t2); a explain extended select * from t3 where NULL >= any (select b from t2); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= (select min(`test`.`t2`.`b`) from `test`.`t2`)))) select * from t3 where NULL >= any (select b from t2 group by 1); a explain extended select * from t3 where NULL >= any (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE -2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Using temporary; Using filesort +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Using temporary Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= <min>(select `test`.`t2`.`b` from `test`.`t2` group by 1)))) select * from t3 where NULL >= some (select b from t2); a explain extended select * from t3 where NULL >= some (select b from t2); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= (select min(`test`.`t2`.`b`) from `test`.`t2`)))) select * from t3 where NULL >= some (select b from t2 group by 1); a explain extended select * from t3 where NULL >= some (select b from t2 group by 1); id select_type table type possible_keys key key_len ref rows filtered Extra -1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE -2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Using temporary; Using filesort +1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 0 0.00 Using temporary Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0 +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <nop>(<in_optimizer>(NULL,(NULL >= <min>(select `test`.`t2`.`b` from `test`.`t2` group by 1)))) insert into t2 values (2,2), (2,1), (3,3), (3,1); select * from t3 where a > all (select max(b) from t2 group by a); a @@ -1566,9 +1566,9 @@ a explain extended select * from t3 where a > all (select max(b) from t2 group by a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00 Using where -2 SUBQUERY t2 ALL NULL NULL NULL NULL 4 100.00 Using temporary; Using filesort +2 SUBQUERY t2 ALL NULL NULL NULL NULL 4 100.00 Using temporary Warnings: -Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>((`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`))) +Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where <not>(<in_optimizer>(`test`.`t3`.`a`,(`test`.`t3`.`a` <= <max>(select max(`test`.`t2`.`b`) from `test`.`t2` group by `test`.`t2`.`a`)))) drop table t2, t3; CREATE TABLE `t1` ( `id` mediumint(9) NOT NULL auto_increment, `taskid` bigint(20) NOT NULL default '0', `dbid` int(11) NOT NULL default '0', `create_date` datetime NOT NULL default '0000-00-00 00:00:00', `last_update` datetime NOT NULL default '0000-00-00 00:00:00', PRIMARY KEY (`id`)) ENGINE=MyISAM CHARSET=latin1 AUTO_INCREMENT=3 ; INSERT INTO `t1` (`id`, `taskid`, `dbid`, `create_date`,`last_update`) VALUES (1, 1, 15, '2003-09-29 10:31:36', '2003-09-29 10:31:36'), (2, 1, 21, now(), now()); @@ -1619,7 +1619,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 UNION t1 ALL NULL NULL NULL NULL 1 100.00 NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL Warnings: -Note 1003 select `test`.`t1`.`s1` AS `s1` from `test`.`t1` where 1 +Note 1003 select `test`.`t1`.`s1` AS `s1` from `test`.`t1` where <nop>(<in_optimizer>('f',('f' > <min>(select `test`.`t1`.`s1` from `test`.`t1` union select `test`.`t1`.`s1` from `test`.`t1`)))) drop table t1; CREATE TABLE t1 (number char(11) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1; INSERT INTO t1 VALUES ('69294728265'),('18621828126'),('89356874041'),('95895001874'); @@ -2829,14 +2829,13 @@ 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 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where +1 PRIMARY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; FirstMatch(t1) 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')) +Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`two` = `test`.`t1`.`two`) and (`test`.`t2`.`one` = `test`.`t1`.`one`) and (`test`.`t2`.`flag` = 'N')) 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 -2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; Using temporary; Using filesort +2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 9 100.00 Using where; Using temporary Warnings: Note 1003 select `test`.`t1`.`one` AS `one`,`test`.`t1`.`two` AS `two`,<expr_cache><`test`.`t1`.`two`,`test`.`t1`.`one`>(<in_optimizer>((`test`.`t1`.`one`,`test`.`t1`.`two`),<exists>(select `test`.`t2`.`one`,`test`.`t2`.`two` from `test`.`t2` where (`test`.`t2`.`flag` = '0') group by `test`.`t2`.`one`,`test`.`t2`.`two` having (trigcond(((<cache>(`test`.`t1`.`one`) = `test`.`t2`.`one`) or isnull(`test`.`t2`.`one`))) and trigcond(((<cache>(`test`.`t1`.`two`) = `test`.`t2`.`two`) or isnull(`test`.`t2`.`two`))) and trigcond(<is_not_null_test>(`test`.`t2`.`one`)) and trigcond(<is_not_null_test>(`test`.`t2`.`two`)))))) AS `test` from `test`.`t1` DROP TABLE t1,t2; @@ -3112,10 +3111,10 @@ SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 2), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); a -2 -4 1 +2 3 +4 SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 1), (SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b)); @@ -3124,8 +3123,8 @@ SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); a -2 1 +2 3 4 SELECT a FROM t1 @@ -3422,7 +3421,7 @@ 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary ALTER TABLE t1 ADD INDEX(a); SELECT * FROM t1 WHERE (a,b) = ANY (SELECT a, max(b) FROM t1 GROUP BY a); a b @@ -3433,7 +3432,7 @@ 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 -2 SUBQUERY t1 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort +2 DEPENDENT SUBQUERY t1 index NULL a 8 NULL 1 DROP TABLE t1; create table t1( f1 int,f2 int); insert into t1 values (1,1),(2,2); diff --git a/mysql-test/suite/pbxt/t/subselect.test b/mysql-test/suite/pbxt/t/subselect.test index 19658cb202e..3f4d6a9a870 100644 --- a/mysql-test/suite/pbxt/t/subselect.test +++ b/mysql-test/suite/pbxt/t/subselect.test @@ -2052,7 +2052,7 @@ SELECT b, MAX(c) FROM t2 GROUP BY b, (SELECT c FROM t2 WHERE b > 2); --error 1242 SELECT b, MAX(c) FROM t2 GROUP BY b, (SELECT c FROM t2 WHERE b > 1); - +--sorted_result SELECT a FROM t1 GROUP BY a HAVING IFNULL((SELECT b FROM t2 WHERE b > 2), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3; @@ -2060,7 +2060,7 @@ SELECT a FROM t1 GROUP BY a SELECT a FROM t1 GROUP BY a HAVING IFNULL((SELECT b FROM t2 WHERE b > 1), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3; - +--sorted_result SELECT a FROM t1 GROUP BY a HAVING IFNULL((SELECT b FROM t2 WHERE b > 4), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3; @@ -2068,7 +2068,7 @@ SELECT a FROM t1 GROUP BY a SELECT a FROM t1 GROUP BY a HAVING IFNULL((SELECT b FROM t2 WHERE b > 4), (SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b)) > 3; - +--sorted_result SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 2), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); @@ -2076,7 +2076,7 @@ SELECT a FROM t1 SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 1), (SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b)); - +--sorted_result SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); diff --git a/mysql-test/t/disabled.def b/mysql-test/t/disabled.def index c244d08e308..c4eb6bf829e 100644 --- a/mysql-test/t/disabled.def +++ b/mysql-test/t/disabled.def @@ -13,3 +13,4 @@ kill : Bug#37780 2008-12-03 HHunger need some changes to be query_cache_28249 : Bug#43861 2009-03-25 main.query_cache_28249 fails sporadically log_tables-big : Bug#48646 2010-11-15 mattiasj report already exists read_many_rows_innodb : Bug#37635 2010-11-15 mattiasj report already exists +main.subselect_mat_cost : MWL#89 tests that must be adjusted to the cost model introduced after the code review diff --git a/mysql-test/t/explain.test b/mysql-test/t/explain.test index 8380aa668b0..1cfd78143c7 100644 --- a/mysql-test/t/explain.test +++ b/mysql-test/t/explain.test @@ -158,7 +158,10 @@ SELECT @@session.sql_mode INTO @old_sql_mode; SET SESSION sql_mode='ONLY_FULL_GROUP_BY'; # EXPLAIN EXTENDED (with subselect). used to crash. should give NOTICE. ---error ER_MIX_OF_GROUP_FUNC_AND_FIELDS +# Before moving max/min optimization to optimize phase this statement +# generated error, but as far as original query do not contain aggregate +# function user should not see error +# --error ER_MIX_OF_GROUP_FUNC_AND_FIELDS EXPLAIN EXTENDED SELECT 1 FROM t1 WHERE f1 > ALL( SELECT t.f1 FROM t1,t1 AS t ); SHOW WARNINGS; diff --git a/mysql-test/t/func_group.test b/mysql-test/t/func_group.test index 85ebc92d6c3..19f87fae3d2 100644 --- a/mysql-test/t/func_group.test +++ b/mysql-test/t/func_group.test @@ -1163,6 +1163,9 @@ INSERT INTO t1 VALUES (1,'c'),(2,NULL); INSERT INTO t2 VALUES (3,'m'),(4,NULL); INSERT INTO t3 VALUES (1,'n'); +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; + --echo --echo # --echo # 1) Test that subquery materialization is setup for query with @@ -1210,10 +1213,6 @@ FROM t2); --echo # 3) Test that subquery materialization is setup for query with --echo # premature optimize() exit due to "Select tables optimized away" --echo # ---echo # NOTE: The result of this query is actually wrong; it should be NULL ---echo # See BUG#47762. Even so, the test case is still needed to test ---echo # that the HAVING subquery does not crash the server ---echo # SELECT MIN(pk) FROM t1 WHERE pk=NULL @@ -1272,6 +1271,8 @@ HAVING ('m') IN ( SELECT v FROM t2); +set @@optimizer_switch=@save_optimizer_switch; + --echo # --echo # Cleanup for BUG#46680 --echo # diff --git a/mysql-test/t/group_min_max.test b/mysql-test/t/group_min_max.test index 8ab7e1c9cb4..1ba06bee942 100644 --- a/mysql-test/t/group_min_max.test +++ b/mysql-test/t/group_min_max.test @@ -406,11 +406,61 @@ explain select a1,a2,b,min(c),max(c) from t1 where exists ( select * from t2 where t2.c = t1.c ) group by a1,a2,b; +select a1,a2,b,min(c),max(c) from t1 +where exists ( select * from t2 where t2.c = t1.c ) +group by a1,a2,b; + # the sub-select is unrelated to MIN/MAX explain select a1,a2,b,min(c),max(c) from t1 where exists ( select * from t2 where t2.c > 'b1' ) group by a1,a2,b; +select a1,a2,b,min(c),max(c) from t1 +where exists ( select * from t2 where t2.c > 'b1' ) +group by a1,a2,b; + +# correlated subselect that doesn't reference the min/max argument +explain select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 where t1.b > 'a' and t2.c > 'b1' ) +group by a1,a2,b; + +select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 where t1.b > 'a' and t2.c > 'b1' ) +group by a1,a2,b; + +explain select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 + where t2.c in (select c from t3 where t3.c > t1.b) and + t2.c > 'b1' ) +group by a1,a2,b; + +select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 + where t2.c in (select c from t3 where t3.c > t1.b) and + t2.c > 'b1' ) +group by a1,a2,b; + +# correlated subselect that references the min/max argument +explain select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 where t1.c > 'a' and t2.c > 'b1' ) +group by a1,a2,b; + +select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 where t1.c > 'a' and t2.c > 'b1' ) +group by a1,a2,b; + +explain select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 + where t2.c in (select c from t3 where t3.c > t1.c) and + t2.c > 'b1' ) +group by a1,a2,b; + +select a1,a2,b,c,min(c), max(c) from t1 +where exists ( select * from t2 + where t2.c in (select c from t3 where t3.c > t1.c) and + t2.c > 'b1' ) +group by a1,a2,b; + # A,B,C) Predicates referencing mixed classes of attributes # plans diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test index 92280718b71..5f46f3c3076 100644 --- a/mysql-test/t/subselect.test +++ b/mysql-test/t/subselect.test @@ -2079,7 +2079,7 @@ SELECT b, MAX(c) FROM t2 GROUP BY b, (SELECT c FROM t2 WHERE b > 2); --error ER_SUBQUERY_NO_1_ROW SELECT b, MAX(c) FROM t2 GROUP BY b, (SELECT c FROM t2 WHERE b > 1); - +--sorted_result SELECT a FROM t1 GROUP BY a HAVING IFNULL((SELECT b FROM t2 WHERE b > 2), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3; @@ -2087,7 +2087,7 @@ SELECT a FROM t1 GROUP BY a SELECT a FROM t1 GROUP BY a HAVING IFNULL((SELECT b FROM t2 WHERE b > 1), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3; - +--sorted_result SELECT a FROM t1 GROUP BY a HAVING IFNULL((SELECT b FROM t2 WHERE b > 4), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)) > 3; @@ -2095,7 +2095,7 @@ SELECT a FROM t1 GROUP BY a SELECT a FROM t1 GROUP BY a HAVING IFNULL((SELECT b FROM t2 WHERE b > 4), (SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b)) > 3; - +--sorted_result SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 2), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); @@ -2103,7 +2103,7 @@ SELECT a FROM t1 SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 1), (SELECT c FROM t2 WHERE c=a AND b > 1 ORDER BY b)); - +--sorted_result SELECT a FROM t1 ORDER BY IFNULL((SELECT b FROM t2 WHERE b > 4), (SELECT c FROM t2 WHERE c=a AND b > 2 ORDER BY b)); @@ -4375,3 +4375,30 @@ SELECT 1 as foo FROM t1 WHERE a < SOME ); DROP TABLE t1; + +--echo # +--echo # BUG#779885: Crash in eliminate_item_equal with materialization=on in +--echo # maria-5.3 +--echo # + +CREATE TABLE t1 ( f1 int ); +INSERT INTO t1 VALUES (19), (20); + +CREATE TABLE t2 ( f10 varchar(32) ); +INSERT INTO t2 VALUES ('c'),('d'); + +CREATE TABLE t3 ( f10 varchar(32) ); +INSERT INTO t3 VALUES ('a'),('b'); + +SELECT * +FROM t1 +WHERE +( 't' ) IN ( + SELECT t3.f10 + FROM t3 + JOIN t2 + ON t2.f10 = t3.f10 +); +DROP TABLE t1,t2,t3; + +--echo End of 5.3 tests diff --git a/mysql-test/t/subselect3.test b/mysql-test/t/subselect3.test index dc625239e84..0c1523a04ca 100644 --- a/mysql-test/t/subselect3.test +++ b/mysql-test/t/subselect3.test @@ -683,7 +683,8 @@ SELECT a, ROW(11, 12) = (SELECT a, 12), ROW(11, 12) IN (SELECT a, 12) FROM t1; # The x alias is used below to workaround bug #40674. # Regression tests for sum function on outer column in subselect from dual: SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 22), ROW(11, 12) IN (SELECT MAX(x), 22) FROM t1; ---echo # 2nd and 3rd columns should be same for x == 11 only +--echo # 2nd and 3rd columns should be same +EXPLAIN SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1; SELECT a AS x, ROW(11, 12) = (SELECT MAX(x), 12), ROW(11, 12) IN (SELECT MAX(x), 12) FROM t1; DROP TABLE t1; diff --git a/mysql-test/t/subselect4.test b/mysql-test/t/subselect4.test index 5cc44ca5557..c57cdf27444 100644 --- a/mysql-test/t/subselect4.test +++ b/mysql-test/t/subselect4.test @@ -318,7 +318,7 @@ INSERT INTO t3 VALUES ('E4','P5',80); SET @old_optimizer_switch = @@session.optimizer_switch; SET @old_join_cache_level = @@session.join_cache_level; -SET SESSION optimizer_switch = 'firstmatch=on,loosescan=on,materialization=on,semijoin=on'; +SET SESSION optimizer_switch = 'firstmatch=on,loosescan=on,materialization=on,in_to_exists=off,semijoin=on'; SET SESSION join_cache_level = 1; CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM); @@ -528,7 +528,7 @@ INSERT INTO t3 VALUES ('E4','P5',80); SET @old_optimizer_switch = @@session.optimizer_switch; SET @old_join_cache_level = @@session.join_cache_level; -SET SESSION optimizer_switch = 'firstmatch=on,loosescan=on,materialization=on,semijoin=on'; +SET SESSION optimizer_switch = 'firstmatch=on,loosescan=on,materialization=on,in_to_exists=off,semijoin=on'; SET SESSION join_cache_level = 1; CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM); @@ -661,7 +661,7 @@ CREATE TABLE t2 (f11 varchar(1)) ; INSERT INTO t2 VALUES ('f'),('d'); SET @old_optimizer_switch = @@session.optimizer_switch; -SET SESSION optimizer_switch = 'materialization=on'; +SET SESSION optimizer_switch = 'materialization=on,in_to_exists=off,'; EXPLAIN SELECT * FROM t1 @@ -695,7 +695,7 @@ CREATE TABLE t2 (f3 int, f4 int not null, PRIMARY KEY (f3)); set @save_optimizer_switch=@@optimizer_switch; -SET @@optimizer_switch = 'materialization=on,semijoin=off'; +SET @@optimizer_switch = 'materialization=on,in_to_exists=off,semijoin=off'; EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4) FROM t2); @@ -746,7 +746,7 @@ SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2); -SET @@optimizer_switch = 'materialization=off,semijoin=off'; +SET @@optimizer_switch = 'materialization=off,in_to_exists=on,semijoin=off'; EXPLAIN @@ -803,7 +803,7 @@ INSERT INTO t1 VALUES (3, 4); INSERT INTO t2 VALUES (5, 6); INSERT INTO t2 VALUES (7, 8); -SET @@optimizer_switch = 'materialization=on,semijoin=off'; +SET @@optimizer_switch = 'materialization=on,in_to_exists=off,semijoin=off'; EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4) FROM t2 WHERE f3 > 10); @@ -853,7 +853,7 @@ EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2 WHERE f3 > 10); SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2 WHERE f3 > 10); -SET @@optimizer_switch = 'materialization=off,semijoin=off'; +SET @@optimizer_switch = 'materialization=off,in_to_exists=on,semijoin=off'; EXPLAIN SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT f3, min(f4) FROM t2 WHERE f3 > 10); @@ -934,7 +934,7 @@ INSERT INTO t2 VALUES (1,7,'p'); set @save_optimizer_switch=@@optimizer_switch; -set @@optimizer_switch='materialization=off,semijoin=off'; +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=off'; EXPLAIN SELECT t1.f3, MAX(t1.f2) @@ -945,7 +945,7 @@ SELECT t1.f3, MAX(t1.f2) FROM t1, t2 WHERE (t2.pk = t1.pk) AND t2.pk IN (SELECT f2 FROM t1); -set @@optimizer_switch='materialization=on,semijoin=off'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; EXPLAIN SELECT t1.f3, MAX(t1.f2) @@ -963,3 +963,452 @@ WHERE (t2.pk = t1.pk) AND t2.pk IN (SELECT f2 FROM t1); set @@optimizer_switch=@save_optimizer_switch; drop table t1, t2; + +--echo # +--echo # LP BUG#641203 Query returns rows where no result is expected (impossible WHERE) +--echo # + +CREATE TABLE t1 (c1 varchar(1) DEFAULT NULL); +CREATE TABLE t2 (c1 varchar(1) DEFAULT NULL); +INSERT INTO t2 VALUES ('k'), ('d'); +CREATE TABLE t3 (c1 varchar(1) DEFAULT NULL); +INSERT INTO t3 VALUES ('a'), ('b'), ('c'); +CREATE TABLE t4 (c1 varchar(1) primary key); +INSERT INTO t4 VALUES ('k'), ('d'); + +EXPLAIN +SELECT * FROM t1 RIGHT JOIN t2 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2); +SELECT * FROM t1 RIGHT JOIN t2 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2); +EXPLAIN +SELECT * FROM t2 LEFT JOIN t1 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2); +SELECT * FROM t2 LEFT JOIN t1 ON t1.c1 WHERE 's' IN (SELECT c1 FROM t2); +EXPLAIN +SELECT * FROM (t2 LEFT JOIN t1 ON t1.c1) LEFT JOIN t3 on t3.c1 WHERE 's' IN (SELECT c1 FROM t2); +SELECT * FROM (t2 LEFT JOIN t1 ON t1.c1) LEFT JOIN t3 on t3.c1 WHERE 's' IN (SELECT c1 FROM t2); +EXPLAIN +SELECT * FROM t4 LEFT JOIN t2 ON t4.c1 WHERE 's' IN (SELECT c1 FROM t2); +SELECT * FROM t4 LEFT JOIN t2 ON t4.c1 WHERE 's' IN (SELECT c1 FROM t2); +drop table t1, t2, t3, t4; + +--echo # +--echo # LP BUG#675981 Assertion `cache != __null' failed in sub_select_cache() +--echo # on EXPLAIN +--echo # + +CREATE TABLE t1 (f1 int,f2 int) ; +INSERT IGNORE INTO t1 VALUES ('2','5'),('2',NULL); + +CREATE TABLE t2 (f1 int, f5 int) ; +INSERT IGNORE INTO t2 VALUES (1,0); + +CREATE TABLE t3 (f4 int) ; +INSERT IGNORE INTO t3 VALUES (0),(0); + +set @@optimizer_switch='in_to_exists=on,materialization=off,semijoin=off'; +EXPLAIN +SELECT * FROM t2 +WHERE f1 IN (SELECT t1.f2 FROM t1 JOIN t3 ON t3.f4); + +drop table t1, t2, t3; + +--echo # +--echo # LP BUG#680005 Second assertion `cache != __null' failed in +--echo # sub_select_cache() on EXPLAIN +--echo # + +CREATE TABLE t1 (f1 int,f2 int,f4 int,f6 int,KEY (f4)) ; +INSERT IGNORE INTO t1 VALUES +('1','5','1','0'),('2','1','1','0'),('2','2','2','0'),('0',NULL,'0','0'), +('2','1','2','0'),('2','0','0','0'),('2','2','2','0'),('2','8','2','0'), +('2','7','2','0'),('2','5','2','0'),('2',NULL,'1','0'); + +CREATE TABLE t2 (f3 int) ; +INSERT IGNORE INTO t2 VALUES ('7'); + +CREATE TABLE t3 (f3 int) ; +INSERT IGNORE INTO t3 VALUES ('2'); + +EXPLAIN +SELECT t1.f4 +FROM t2 JOIN t1 ON t1.f6 +WHERE +( t1.f2 ) IN (SELECT SUBQUERY2_t1.f3 + FROM t3 AS SUBQUERY2_t1 + JOIN + (t1 AS SUBQUERY2_t2 + JOIN + t1 AS SUBQUERY2_t3 ON SUBQUERY2_t3.f1) + ON SUBQUERY2_t3.f2) +GROUP BY t1.f4 ORDER BY t1.f1 LIMIT 10; + +drop table t1, t2, t3; + +--echo # +--echo # LP BUG#680038 bool close_thread_table(THD*, TABLE**): +--echo # Assertion `table->key_read == 0' failed in EXPLAIN +--echo # + +CREATE TABLE t1 (f1 int,f3 int,f4 int) ; +INSERT IGNORE INTO t1 VALUES (NULL,1,0); + +CREATE TABLE t2 (f2 int,f4 int,f5 int) ; +INSERT IGNORE INTO t2 VALUES (8,0,0),(5,0,0); + +CREATE TABLE t3 (f4 int,KEY (f4)) ; +INSERT IGNORE INTO t3 VALUES (0),(0); + +set @@optimizer_switch='semijoin=off'; + +EXPLAIN +SELECT * FROM t1 WHERE +(SELECT f2 FROM t2 + WHERE f4 <= ALL + (SELECT SQ1_t1.f4 + FROM t3 AS SQ1_t1 JOIN t3 AS SQ1_t3 ON SQ1_t3.f4 + GROUP BY SQ1_t1.f4)); + +drop table t1, t2, t3; + +--echo # +--echo # BUG#52317: Assertion failing in Field_varstring::store() +--echo # at field.cc:6833 +--echo # + +CREATE TABLE t1 (i INTEGER); +INSERT INTO t1 VALUES (1); +CREATE TABLE t2 (i INTEGER, KEY k(i)); +INSERT INTO t2 VALUES (1), (2); + +EXPLAIN +SELECT i FROM t1 WHERE (1) NOT IN (SELECT i FROM t2); + +DROP TABLE t2; +DROP TABLE t1; + +--echo # +--echo # LP BUG#680846: Crash in clear_tables() with subqueries +--echo # + +CREATE TABLE t1 (f3 int) ; +INSERT IGNORE INTO t1 VALUES (0),(0); + +CREATE TABLE t2 (f1 int,f3 int,f4 varchar(32)) ; +INSERT IGNORE INTO t2 VALUES (1,0,'f'); + +EXPLAIN +SELECT COUNT(t2.f3), + (SELECT COUNT(f3) FROM t1 WHERE t2.f1) AS f9 +FROM t2 JOIN t1 ON t1.f3 +WHERE ('v') IN (SELECT f4 FROM t2) +GROUP BY f9; + +SELECT COUNT(t2.f3), + (SELECT COUNT(f3) FROM t1 WHERE t2.f1) AS f9 +FROM t2 JOIN t1 ON t1.f3 +WHERE ('v') IN (SELECT f4 FROM t2) +GROUP BY f9; + +EXPLAIN +SELECT COUNT(t2.f3), + (SELECT COUNT(f3) FROM t1 WHERE t2.f1) AS f9 +FROM t2 JOIN t1 ON t1.f3 +WHERE ('v') IN (SELECT f4 FROM t2) +ORDER BY f9; + +SELECT COUNT(t2.f3), + (SELECT COUNT(f3) FROM t1 WHERE t2.f1) AS f9 +FROM t2 JOIN t1 ON t1.f3 +WHERE ('v') IN (SELECT f4 FROM t2) +ORDER BY f9; + +# these queries are like the ones above, but without the ON clause, +# resulting in a different crash (failed assert) +EXPLAIN +SELECT COUNT(t2.f3), + (SELECT t2.f1 FROM t1 limit 1) AS f9 +FROM t2 JOIN t1 +WHERE ('v') IN (SELECT f4 FROM t2) +GROUP BY f9; + +SELECT COUNT(t2.f3), + (SELECT t2.f1 FROM t1 limit 1) AS f9 +FROM t2 JOIN t1 +WHERE ('v') IN (SELECT f4 FROM t2) +GROUP BY f9; + +EXPLAIN +SELECT COUNT(t2.f3), + (SELECT t2.f1 FROM t1 limit 1) AS f9 +FROM t2 JOIN t1 +WHERE ('v') IN (SELECT f4 FROM t2) +ORDER BY f9; + +SELECT COUNT(t2.f3), + (SELECT t2.f1 FROM t1 limit 1) AS f9 +FROM t2 JOIN t1 +WHERE ('v') IN (SELECT f4 FROM t2) +ORDER BY f9; + +drop table t1,t2; + +--echo # +--echo # LP BUG#682683 Crash in create_tmp_table called from +--echo # JOIN::init_execution +--echo # + +CREATE TABLE t2 (f1 int) ; +INSERT INTO t2 VALUES (1),(2); + +CREATE TABLE t1 (f1 int) ; + +EXPLAIN +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 GROUP BY field1; +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 GROUP BY field1; +EXPLAIN +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 ORDER BY field1; +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 ORDER BY field1; + +INSERT INTO t1 VALUES (1),(2); + +EXPLAIN +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 GROUP BY field1; +--error ER_SUBQUERY_NO_1_ROW +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 GROUP BY field1; +EXPLAIN +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 ORDER BY field1; +--error ER_SUBQUERY_NO_1_ROW +SELECT (SELECT f1 FROM t1) AS field1 FROM t2 ORDER BY field1; + +drop table t1,t2; + +--echo # +--echo # LP BUG#680943 Assertion `!table || (!table->read_set || +--echo # bitmap_is_set(table->read_set, field_index))' failed with subquery +--echo # + +CREATE TABLE t1 (f1 int,f3 int) ; +INSERT IGNORE INTO t1 VALUES ('6','0'),('4','0'); + +CREATE TABLE t2 (f1 int,f2 int,f3 int) ; +INSERT IGNORE INTO t2 VALUES ('6','0','0'),('2','0','0'); + +SELECT f2 +FROM (SELECT * FROM t2) AS alias1 +WHERE (SELECT SQ2_t2.f1 + FROM t1 JOIN t1 AS SQ2_t2 ON SQ2_t2.f3 + WHERE SQ2_t2.f3 AND alias1.f1) +ORDER BY f3 ; + +drop table t1,t2; + +--echo # +--echo # LP BUG#715062: Wrong result with VIEW + UNION + subquery in maria-5.3-mwl89 +--echo # + +create table t1 (f1 int); +create table t2 (f2 int); +create table t3 (f3 int); +insert into t1 values (2); +insert into t2 values (2); +insert into t3 values (7); + +CREATE VIEW v1 AS SELECT 2 UNION SELECT 2 ; +CREATE VIEW v2 AS SELECT * from t1 UNION SELECT * from t2 ; + +set @save_optimizer_switch=@@optimizer_switch; +SET @@optimizer_switch = 'in_to_exists=off,semijoin=off,materialization=on'; + +EXPLAIN +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN ( SELECT * FROM v1 ); +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN ( SELECT * FROM v1 ); + +EXPLAIN +SELECT ( 5 ) IN ( SELECT * FROM v1 ); +SELECT ( 5 ) IN ( SELECT * FROM v1 ); + +EXPLAIN +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN (SELECT * FROM v2); +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN (SELECT * FROM v2); + +EXPLAIN +SELECT 'bug' FROM t3 WHERE ( 5 ) IN (SELECT * FROM v2); +SELECT 'bug' FROM t3 WHERE ( 5 ) IN (SELECT * FROM v2); + +EXPLAIN +SELECT ( 5 ) IN ( SELECT * FROM v2 ); +SELECT ( 5 ) IN ( SELECT * FROM v2 ); + +SET @@optimizer_switch = 'in_to_exists=on,semijoin=off,materialization=off'; + +EXPLAIN +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN ( SELECT * FROM v1 ); +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN ( SELECT * FROM v1 ); + +EXPLAIN +SELECT ( 5 ) IN ( SELECT * FROM v1 ); +SELECT ( 5 ) IN ( SELECT * FROM v1 ); + +EXPLAIN +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN (SELECT * FROM v2); +SELECT 'bug' FROM DUAL WHERE ( 5 ) IN (SELECT * FROM v2); + +EXPLAIN +SELECT 'bug' FROM t3 WHERE ( 5 ) IN (SELECT * FROM v2); +SELECT 'bug' FROM t3 WHERE ( 5 ) IN (SELECT * FROM v2); + +EXPLAIN +SELECT ( 5 ) IN ( SELECT * FROM v2 ); +SELECT ( 5 ) IN ( SELECT * FROM v2 ); + +set @@optimizer_switch=@save_optimizer_switch; + +drop table t1,t2,t3; +drop view v1,v2; + +--echo # +--echo # LP BUG#715069 Wrong result with GROUP BY inside subquery and materialization=off +--echo # + +CREATE TABLE t0 ( f1 int(11), f2 int(11), f10 varchar(1), PRIMARY KEY (f1)) ; +INSERT INTO t0 VALUES (8,8,'u'),(10,5,'o'); + +CREATE TABLE t1 (f1a int, f2a int not null, f3a varchar(3) not null, PRIMARY KEY (f1a)) ; +INSERT INTO t1 VALUES +(8,8,'a1a'), +(10,5,'b1b'); + +CREATE TABLE t2 (f1b int, f2b int not null, f3b varchar(3) not null, PRIMARY KEY (f1b)) ; +INSERT INTO t2 VALUES +(10,5,'d1d'); + +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch = 'materialization=off'; + +EXPLAIN +SELECT alias2.f1 , alias2.f2 +FROM t0 AS alias1 +RIGHT JOIN t0 AS alias2 ON alias2.f10 +WHERE ( alias2.f1 , alias2.f2 ) IN ( SELECT f2 , f1 FROM t0 GROUP BY f2 , f1 ); + +SELECT alias2.f1 , alias2.f2 +FROM t0 AS alias1 +RIGHT JOIN t0 AS alias2 ON alias2.f10 +WHERE ( alias2.f1 , alias2.f2 ) IN ( SELECT f2 , f1 FROM t0 GROUP BY f2 , f1 ); + +EXPLAIN +SELECT * FROM t2 WHERE (f1b, f2b) IN (SELECT f1a, f2a FROM t1 GROUP BY f1a, f2a); +SELECT * FROM t2 WHERE (f1b, f2b) IN (SELECT f1a, f2a FROM t1 GROUP BY f1a, f2a); + +EXPLAIN +SELECT * FROM t2 WHERE (f1b) IN (SELECT f1a FROM t1 GROUP BY f1a, f2a); +SELECT * FROM t2 WHERE (f1b) IN (SELECT f1a FROM t1 GROUP BY f1a, f2a); + +SET @@optimizer_switch = 'materialization=on'; + +EXPLAIN +SELECT alias2.f1 , alias2.f2 +FROM t0 AS alias1 +RIGHT JOIN t0 AS alias2 ON alias2.f10 +WHERE ( alias2.f1 , alias2.f2 ) IN ( SELECT f2 , f1 FROM t0 GROUP BY f2 , f1 ); + +SELECT alias2.f1 , alias2.f2 +FROM t0 AS alias1 +RIGHT JOIN t0 AS alias2 ON alias2.f10 +WHERE ( alias2.f1 , alias2.f2 ) IN ( SELECT f2 , f1 FROM t0 GROUP BY f2 , f1 ); + +EXPLAIN +SELECT * FROM t2 WHERE (f1b, f2b) IN (SELECT f1a, f2a FROM t1 GROUP BY f1a, f2a); +SELECT * FROM t2 WHERE (f1b, f2b) IN (SELECT f1a, f2a FROM t1 GROUP BY f1a, f2a); + +EXPLAIN +SELECT * FROM t2 WHERE (f1b) IN (SELECT f1a FROM t1 GROUP BY f1a, f2a); +SELECT * FROM t2 WHERE (f1b) IN (SELECT f1a FROM t1 GROUP BY f1a, f2a); + +set @@optimizer_switch=@save_optimizer_switch; + +drop table t0,t1,t2; + +--echo # +--echo # LP BUG#718593 Crash in substitute_for_best_equal_field -> eliminate_item_equal -> +--echo # Item_field::find_item_equal -> Item_equal::contains +--echo # + +set @save_optimizer_switch=@@optimizer_switch; +SET @@optimizer_switch = 'semijoin=off'; + +CREATE TABLE t1 ( f3 int(11), f10 varchar(1), f11 varchar(1)) ; +INSERT IGNORE INTO t1 VALUES (6,'f','f'),(2,'d','d'); + +CREATE TABLE t2 ( f12 int(11), f13 int(11)) ; +insert into t2 values (1,2), (3,4); + +EXPLAIN +SELECT * FROM t2 +WHERE ( f12 ) IN ( + SELECT alias2.f3 + FROM t1 AS alias1 JOIN t1 AS alias2 ON alias2.f10 = alias1.f11 + WHERE alias1.f11 OR alias1.f3 = 50 AND alias1.f10 +); +SELECT * FROM t2 +WHERE ( f12 ) IN ( + SELECT alias2.f3 + FROM t1 AS alias1 JOIN t1 AS alias2 ON alias2.f10 = alias1.f11 + WHERE alias1.f11 OR alias1.f3 = 50 AND alias1.f10 +); + +EXPLAIN +SELECT * FROM t2 +WHERE ( f12 ) IN ( + SELECT alias2.f3 + FROM t1 AS alias1, t1 AS alias2 + WHERE (alias2.f10 = alias1.f11) AND (alias1.f11 OR alias1.f3 = 50 AND alias1.f10)); +SELECT * FROM t2 +WHERE ( f12 ) IN ( + SELECT alias2.f3 + FROM t1 AS alias1, t1 AS alias2 + WHERE (alias2.f10 = alias1.f11) AND (alias1.f11 OR alias1.f3 = 50 AND alias1.f10)); + +set @@optimizer_switch=@save_optimizer_switch; +drop table t1, t2; + +--echo # +--echo # LP BUG#715759 Wrong result with in_to_exists=on in maria-5.3-mwl89 +--echo # + +set @save_optimizer_switch=@@optimizer_switch; +CREATE TABLE t1 (a1 int, a2 int) ; +INSERT INTO t1 VALUES (1, 2); +INSERT INTO t1 VALUES (3, 4); + +CREATE TABLE t2 (b1 int, b2 int) ; +INSERT INTO t2 VALUES (1, 2); + +SET @@optimizer_switch = 'in_to_exists=on,materialization=off,semijoin=off'; + +EXPLAIN SELECT * FROM t1 WHERE a1 IN (SELECT b1 FROM t2 WHERE b1 = b2); +SELECT * FROM t1 WHERE a1 IN (SELECT b1 FROM t2 WHERE b1 = b2); + +set @@optimizer_switch=@save_optimizer_switch; +drop table t1, t2; + +--echo # +--echo # LP BUG#772309 join_tab_cmp_straight(): Assertion `!jt2->emb_sj_nest' failed in maria-5.3-mwl89 with semijoin +--echo # + +CREATE TABLE t1 ( f2 int) ; +INSERT INTO t1 VALUES (0),(0); + +CREATE TABLE t2 ( f1 int NOT NULL ) ; +INSERT INTO t2 VALUES (0),(0); + +CREATE TABLE t3 ( f1 int NOT NULL , f2 int) ; +INSERT INTO t3 VALUES (0,0), (0,0); + +EXPLAIN SELECT STRAIGHT_JOIN ( + SELECT f2 FROM t1 WHERE ( f2 ) IN ( SELECT t3.f2 FROM t3 JOIN t2 ON t2.f1 = 1 ) +); +SELECT STRAIGHT_JOIN ( + SELECT f2 FROM t1 WHERE ( f2 ) IN ( SELECT t3.f2 FROM t3 JOIN t2 ON t2.f1 = 1 ) +); + +drop table t1, t2, t3; diff --git a/mysql-test/t/subselect_mat.test b/mysql-test/t/subselect_mat.test index c18585d0478..90ece548b58 100644 --- a/mysql-test/t/subselect_mat.test +++ b/mysql-test/t/subselect_mat.test @@ -48,7 +48,7 @@ insert into t2i select * from t2; insert into t3i select * from t3; # force the use of materialization -set @@optimizer_switch='semijoin=off'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; /****************************************************************************** * Simple tests. @@ -111,22 +111,22 @@ 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'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on'; 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'; +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on'; execute st1; -set @@optimizer_switch='default,semijoin=off'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=on'; execute st1; -set @@optimizer_switch='default,materialization=off'; +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on'; 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'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; execute st1; -set @@optimizer_switch='default,materialization=off'; +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=on'; execute st1; -set @@optimizer_switch='default,semijoin=off'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; # materialize the result of ORDER BY # non-indexed fields @@ -327,7 +327,7 @@ select * from t1 order by (select col from columns limit 1); Test that BLOBs are not materialized (except when arguments of some functions). */ # force materialization to be always considered -set @@optimizer_switch='semijoin=off'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; set @prefix_len = 6; # BLOB == 16 (small blobs that could be stored in HEAP tables) @@ -680,7 +680,7 @@ 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'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; explain extended select bin(a1), bin(a2) from t1bit @@ -718,7 +718,7 @@ drop table t1, t2, t3, t1i, t2i, t3i, columns; /****************************************************************************** * Test the cache of the left operand of IN. ******************************************************************************/ -set @@optimizer_switch='semijoin=off'; +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=off'; # Test that default values of Cached_item are not used for comparison create table t1 (s1 int); @@ -812,23 +812,28 @@ drop table t2; create table t1 (a1 int key); create table t2 (b1 int); insert into t1 values (5); - +-- echo Only the last query returns correct result. Filed as BUG#40037. # Query with group by, executed via materialization +set @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=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); # Query with group by, executed via IN=>EXISTS -set @@optimizer_switch='default,materialization=off'; +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=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'; +set @@optimizer_switch='materialization=on,in_to_exists=off,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 via IN=>EXISTS +set @@optimizer_switch='materialization=off,in_to_exists=on,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 +# This is the only correct result of all five queries. This difference is # filed as BUG#40037. -set @@optimizer_switch='default,materialization=off'; +set @@optimizer_switch='materialization=off,in_to_exists=off,semijoin=on'; 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; @@ -840,7 +845,7 @@ 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'; +set @@optimizer_switch='materialization=on,in_to_exists=off,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)"; @@ -861,7 +866,7 @@ 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'; +SET @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=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); @@ -883,7 +888,7 @@ 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'; +SET @@optimizer_switch='materialization=on,in_to_exists=off,semijoin=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); @@ -900,7 +905,7 @@ 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'; +set session optimizer_switch='materialization=off,in_to_exists=on'; 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; @@ -1022,21 +1027,23 @@ CREATE TABLE t2 ( f2 int); INSERT IGNORE INTO t2 VALUES (3),(4); CREATE TABLE t3 (f3a int, f3b int); -set session optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off'; +set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,in_to_exists=off'; EXPLAIN SELECT * FROM t2 WHERE (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1); SELECT * FROM t2 WHERE (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1); EXPLAIN +SELECT (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1); +SELECT (SELECT f3a FROM t3) NOT IN (SELECT f1a FROM t1); + +EXPLAIN SELECT * FROM t2 WHERE (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1); SELECT * FROM t2 WHERE (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1); -insert into t3 values (1,1),(2,2); - EXPLAIN -SELECT * FROM t2 WHERE (SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1); -SELECT * FROM t2 WHERE (SELECT f3a FROM t3 where f3a > 3) NOT IN (SELECT f1a FROM t1); +SELECT (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1); +SELECT (SELECT f3a, f3b FROM t3) NOT IN (SELECT f1a, f1b FROM t1); drop table t1, t2, t3; @@ -1051,7 +1058,7 @@ CREATE TABLE t2 (f1 int NOT NULL, f2 int, f3 int) ; INSERT INTO t1 VALUES (60, 3, null), (61, null, 77); INSERT INTO t2 VALUES (1000,6,2); -set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off'; +set @@optimizer_switch='materialization=on,partial_match_rowid_merge=on,partial_match_table_scan=off,in_to_exists=off'; EXPLAIN SELECT (f1, f2, f3) NOT IN diff --git a/mysql-test/t/subselect_mat_cost.test b/mysql-test/t/subselect_mat_cost.test new file mode 100644 index 00000000000..ced99bccea3 --- /dev/null +++ b/mysql-test/t/subselect_mat_cost.test @@ -0,0 +1,204 @@ +# +# Tets of cost-based choice between the materialization and in-to-exists +# subquery execution strategies (MWL#89) +# + +--disable_warnings +drop table if exists t1, t2, t1_1024, t2_1024; +drop procedure if exists make_t1_indexes; +drop procedure if exists make_t2_indexes; +drop procedure if exists remove_t1_indexes; +drop procedure if exists remove_t2_indexes; +drop procedure if exists add_materialization_data; +drop procedure if exists delete_materialization_data; +drop procedure if exists set_all_columns_not_null; +drop procedure if exists set_all_columns_nullable; +--enable_warnings + +create table t1 (a1 char(8), a2 char(8), a3 char(8), a4 int); +insert into t1 values ('1 - 00', '2 - 00', '3 - 00', 0); +insert into t1 values ('1 - 01', '2 - 01', '3 - 01', 1); + +create table t2 (b1 char(8), b2 char(8), b3 char(8), b4 int); +insert into t2 values ('1 - 01', '2 - 01', '3 - 01', 1); +insert into t2 values ('1 - 01', '2 - 01', '3 - 02', 2); +insert into t2 values ('1 - 02', '2 - 02', '3 - 03', 3); +insert into t2 values ('1 - 02', '2 - 02', '3 - 04', 4); +insert into t2 values ('1 - 03', '2 - 03', '3 - 05', 5); + +create table t1_1024 (a1 blob(1024), a2 blob(1024)); +insert into t1_1024 values (concat('1 - 00', repeat('x', 1018)), concat('2 - 00', repeat('x', 1018))); +insert into t1_1024 values (concat('1 - 01', repeat('x', 1018)), concat('2 - 01', repeat('x', 1018))); + +create table t2_1024 (b1 blob(1024), b2 blob(1024)); +insert into t2_1024 values (concat('1 - 01', repeat('x', 1018)), concat('2 - 01', repeat('x', 1018))); +insert into t2_1024 values (concat('1 - 02', repeat('x', 1018)), concat('2 - 02', repeat('x', 1018))); +insert into t2_1024 values (concat('1 - 03', repeat('x', 1018)), concat('2 - 03', repeat('x', 1018))); +insert into t2_1024 values (concat('1 - 04', repeat('x', 1018)), concat('2 - 04', repeat('x', 1018))); + +delimiter |; +create procedure make_t1_indexes() +begin + create index it1i1 on t1 (a1); + create index it1i2 on t1 (a2); + create index it1i3 on t1 (a1, a2); + create index it1_1024i1 on t1_1024 (a1(6)); + create index it1_1024i2 on t1_1024 (a2(6)); + create index it1_1024i3 on t1_1024 (a1(6), a2(6)); +end| + +create procedure make_t2_indexes() +begin + create index it2i1 on t2 (b1); + create index it2i2 on t2 (b2); + create index it2i3 on t2 (b1, b2); + create unique index it2i4 on t2 (b1, b2, b3); + create index it2_1024i1 on t2_1024 (b1(6)); + create index it2_1024i2 on t2_1024 (b2(6)); + create index it2_1024i3 on t2_1024 (b1(6), b2(6)); +end| + +create procedure remove_t1_indexes() +begin + drop index it1i1 on t1; + drop index it1i2 on t1; + drop index it1i3 on t1; + drop index it1_1024i1 on t1_1024; + drop index it1_1024i2 on t1_1024; + drop index it1_1024i3 on t1_1024; +end| + +create procedure remove_t2_indexes() +begin + drop index it2i1 on t2; + drop index it2i2 on t2; + drop index it2i3 on t2; + drop index it2i4 on t2; + drop index it2_1024i1 on t2_1024; + drop index it2_1024i2 on t2_1024; + drop index it2_1024i3 on t2_1024; +end| + +create procedure add_materialization_data() +begin +insert into t1 values ('1 - 03', '2 - 03', '3 - 03', 3); +insert into t1 values ('1 - 04', '2 - 04', '3 - 04', 4); +insert into t1 values ('1 - 05', '2 - 05', '3 - 05', 5); +insert into t1 values ('1 - 06', '2 - 06', '3 - 06', 6); +insert into t1 values ('1 - 07', '2 - 07', '3 - 07', 7); +insert into t1_1024 values (concat('1 - 03', repeat('x', 1018)), concat('2 - 03', repeat('x', 1018))); +end| + +create procedure delete_materialization_data() +begin +delete from t1 where a1 >= '1 - 03'; +delete from t1_1024 where a1 >= '1 - 03'; +end| + +create procedure set_all_columns_not_null() +begin +alter table t1 modify a1 char(8) not null, modify a2 char(8) not null, modify a3 char(8) not null; +alter table t2 modify b1 char(8) not null, modify b2 char(8) not null, modify b3 char(8) not null; +end| + +create procedure set_all_columns_nullable() +begin +alter table t1 modify a1 char(8) null, modify a2 char(8) null, modify a3 char(8) null; +alter table t2 modify b1 char(8) null, modify b2 char(8) null, modify b3 char(8) null; +end| + +delimiter ;| +-- echo + +-- echo /****************************************************************************** +-- echo 1. Both materialization and in-to-exists are ON, make a cost-based choice. +-- echo ******************************************************************************/ +set @@optimizer_switch='materialization=on,in_to_exists=on'; +-- echo +-- echo /* 1.1 In-to-exists is cheaper */ +call make_t1_indexes(); + +-- echo /* 1.1.1 non-indexed table access */ +-- source include/subselect_mat_cost.inc + +-- echo /* 1.1.2 indexed table access, nullabale columns. */ +call make_t2_indexes(); +-- source include/subselect_mat_cost.inc + +-- echo /* 1.1.3 indexed table access, non-nullabale columns. */ +call set_all_columns_not_null(); +-- source include/subselect_mat_cost.inc +call set_all_columns_nullable(); + +-- echo +-- echo /* 1.2 Materialization is cheaper */ +# make materialization cheaper +call add_materialization_data(); +call remove_t1_indexes(); + +-- echo /* 1.2.1 non-indexed table access */ +call remove_t2_indexes(); +-- source include/subselect_mat_cost.inc + +-- echo /* 1.2.2 indexed table access, nullabale columns. */ +call make_t2_indexes(); +-- source include/subselect_mat_cost.inc + +-- echo /* 1.2.3 indexed table access, non-nullabale columns. */ +call set_all_columns_not_null(); +-- source include/subselect_mat_cost.inc +call set_all_columns_nullable(); + + +insert into t1 values ('1 - 02', '2 - 02', '3 - 02', 2); + +-- echo /****************************************************************************** +-- echo 2. Materialization is OFF, in-to-exists is ON, materialization is cheaper. +-- echo ******************************************************************************/ +set @@optimizer_switch='materialization=off,in_to_exists=on'; + +-- echo /* 2.1 non-indexed table access */ +call remove_t2_indexes(); +-- source include/subselect_mat_cost.inc + +-- echo /* 2.2 indexed table access, nullabale columns. */ +call make_t2_indexes(); +-- source include/subselect_mat_cost.inc + +-- echo /* 2.3 indexed table access, non-nullabale columns. */ +call set_all_columns_not_null(); +-- source include/subselect_mat_cost.inc +call set_all_columns_nullable(); + + +-- echo /****************************************************************************** +-- echo 3. Materialization is ON, in-to-exists is OFF, in-to-exists is cheaper. +-- echo ******************************************************************************/ +set @@optimizer_switch='materialization=on,in_to_exists=off'; +# make IN-TO-EXISTS cheaper +call delete_materialization_data(); +call make_t1_indexes(); + +-- echo /* 3.1 non-indexed table access */ +call remove_t2_indexes(); +-- source include/subselect_mat_cost.inc + +-- echo /* 3.2 indexed table access, nullabale columns. */ +call make_t2_indexes(); +-- source include/subselect_mat_cost.inc + +-- echo /* 3.3 indexed table access, non-nullabale columns. */ +call set_all_columns_not_null(); +-- source include/subselect_mat_cost.inc +call set_all_columns_nullable(); + + +drop procedure make_t1_indexes; +drop procedure make_t2_indexes; +drop procedure remove_t1_indexes; +drop procedure remove_t2_indexes; +drop procedure add_materialization_data; +drop procedure delete_materialization_data; +drop procedure set_all_columns_not_null; +drop procedure set_all_columns_nullable; +drop table t1, t2, t1_1024, t2_1024; diff --git a/mysql-test/t/subselect_mat_cost_bugs.test b/mysql-test/t/subselect_mat_cost_bugs.test new file mode 100644 index 00000000000..bc052ea04b1 --- /dev/null +++ b/mysql-test/t/subselect_mat_cost_bugs.test @@ -0,0 +1,311 @@ +# +# Test cases for bugs related to the implementation of +# MWL#89 cost-based choice between the materialization and in-to-exists +# + +--echo # +--echo # LP BUG#643424 valgrind warning in choose_subquery_plan() +--echo # + +CREATE TABLE t1 ( + pk int(11) NOT NULL AUTO_INCREMENT, + c1 int(11) DEFAULT NULL, + c2 int(11) DEFAULT NULL, + PRIMARY KEY (pk), + KEY c2 (c2)); + +INSERT INTO t1 VALUES (1,NULL,2); +INSERT INTO t1 VALUES (2,7,9); +INSERT INTO t1 VALUES (9,NULL,8); + +CREATE TABLE t2 ( + pk int(11) NOT NULL AUTO_INCREMENT, + c1 int(11) DEFAULT NULL, + c2 int(11) DEFAULT NULL, + PRIMARY KEY (pk), + KEY c2 (c2)); + +INSERT INTO t2 VALUES (1,1,7); + +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='materialization=on,in_to_exists=on,semijoin=off'; + +SELECT pk FROM t1 WHERE (c2, c1) IN (SELECT c2, c2 FROM t2); + +set session optimizer_switch=@save_optimizer_switch; + +drop table t1, t2; + + +--echo # +--echo # LP BUG#652727 Crash in create_ref_for_key() +--echo # + +CREATE TABLE t2 ( + pk int(11) NOT NULL AUTO_INCREMENT, + c1 int(11) DEFAULT NULL, + PRIMARY KEY (pk)); + +INSERT INTO t2 VALUES (10,7); +INSERT INTO t2 VALUES (11,1); +INSERT INTO t2 VALUES (17,NULL); + +CREATE TABLE t1 ( + pk int(11) NOT NULL AUTO_INCREMENT, + c1 int(11) DEFAULT NULL, + PRIMARY KEY (pk)); + +INSERT INTO t1 VALUES (15,1); +INSERT INTO t1 VALUES (19,NULL); + +CREATE TABLE t3 (c2 int(11) DEFAULT NULL, KEY c2 (c2)); +INSERT INTO t3 VALUES (1); + +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='materialization=on,in_to_exists=on,semijoin=off'; + +SELECT c2 +FROM t3 +WHERE (2, 6) IN (SELECT t1.c1, t1.c1 FROM t1 STRAIGHT_JOIN t2 ON t2.pk = t1.pk); + +set session optimizer_switch=@save_optimizer_switch; +drop table t1, t2, t3; + + +--echo # +--echo # LP BUG#641245 Crash in Item_equal::contains +--echo # + +CREATE TABLE t1 ( + pk int(11) NOT NULL AUTO_INCREMENT, + c1 int(11) DEFAULT NULL, + c2 int(11) DEFAULT NULL, + c3 varchar(1) DEFAULT NULL, + c4 varchar(1) DEFAULT NULL, + PRIMARY KEY (pk), + KEY c2 (c2), + KEY c3 (c3,c2)); + +INSERT INTO t1 VALUES (10,7,8,'v','v'); +INSERT INTO t1 VALUES (11,1,9,'r','r'); +INSERT INTO t1 VALUES (12,5,9,'a','a'); + +create table t1a like t1; +insert into t1a select * from t1; + +create table t1b like t1; +insert into t1b select * from t1; + +CREATE TABLE t2 ( + pk int(11) NOT NULL AUTO_INCREMENT, + c1 int(11) DEFAULT NULL, + c2 int(11) DEFAULT NULL, + c3 varchar(1) DEFAULT NULL, + c4 varchar(1) DEFAULT NULL, + PRIMARY KEY (pk), + KEY c2 (c2), + KEY c3 (c3,c2)); + +INSERT INTO t2 VALUES (1,NULL,2,'w','w'); +INSERT INTO t2 VALUES (2,7,9,'m','m'); + +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=off'; + +let $query= +SELECT pk +FROM t1 +WHERE c1 IN + (SELECT t1a.c1 + FROM (t1b JOIN t2 ON t2.c3 = t1b.c4) LEFT JOIN + t1a ON (t1a.c2 = t1b.pk AND 2) + WHERE t1.pk) ; +eval EXPLAIN EXTENDED $query; +eval $query; + +DROP TABLE t1, t1a, t1b, t2; + +--echo # +--echo # LP BUG#714808 Assertion `outer_lookup_keys <= outer_record_count' +--echo # failed with materialization + +CREATE TABLE t1 ( pk int(11), PRIMARY KEY (pk)) ; +CREATE TABLE t2 ( f2 int(11)) ; +CREATE TABLE t3 ( f1 int(11), f3 varchar(1), KEY (f1)) ; +INSERT INTO t3 VALUES (7,'f'); + +set @@optimizer_switch='materialization=on,in_to_exists=on,semijoin=off'; + +EXPLAIN +SELECT t1.* +FROM t3 RIGHT JOIN t1 ON t1.pk = t3.f1 +WHERE t3.f3 OR ( 3 ) IN ( SELECT f2 FROM t2 ); + +SELECT t1.* +FROM t3 RIGHT JOIN t1 ON t1.pk = t3.f1 +WHERE t3.f3 OR ( 3 ) IN ( SELECT f2 FROM t2 ); + +drop table t1,t2,t3; + +--echo # +--echo # LP BUG#714999 Second crash in select_describe() with nested subqueries +--echo # + +CREATE TABLE t1 ( pk int(11)) ; +INSERT INTO t1 VALUES (29); + +CREATE TABLE t2 ( f1 varchar(1)) ; +INSERT INTO t2 VALUES ('f'),('d'); + +CREATE TABLE t3 ( f2 varchar(1)) ; + +EXPLAIN SELECT f2 FROM t3 WHERE ( + SELECT MAX( pk ) FROM t1 + WHERE EXISTS ( + SELECT DISTINCT f1 + FROM t2 + ) +) IS NULL ; + +drop table t1, t2, t3; + +--echo # +--echo # LP BUG#715034 Item_sum_distinct::clear(): Assertion `tree != 0' failed +--echo # + +CREATE TABLE t2 ( f2 int(11)) ; + +CREATE TABLE t1 ( f3 int(11), KEY (f3)) ; +INSERT INTO t1 VALUES (6),(4); + +EXPLAIN +SELECT * FROM (SELECT * FROM t2) AS a2 +WHERE (SELECT distinct SUM(distinct f3 ) FROM t1); + +insert into t2 values (1),(2); +EXPLAIN +SELECT * FROM (SELECT * FROM t2) AS a2 +WHERE (SELECT distinct SUM(distinct f3 ) FROM t1); + +drop table t1,t2; + +--echo # +--echo # LP BUG#715027 Assertion `!table || (!table->read_set || bitmap_is_set(table->read_set, field_index))' failed +--echo # + +CREATE TABLE t1 ( f1 int(11), PRIMARY KEY (f1)) ; +INSERT INTO t1 VALUES (28),(29); + +CREATE TABLE t2 ( f2 int(11), f3 int(11), f10 varchar(1)) ; +INSERT INTO t2 VALUES (NULL,6,'f'),(4,2,'d'); + +EXPLAIN +SELECT alias2.f2 AS field1 +FROM t1 AS alias1 JOIN ( SELECT * FROM t2 ) AS alias2 ON alias2.f3 = alias1.f1 +WHERE ( + SELECT t2.f2 + FROM t2 JOIN t1 ON t1.f1 + WHERE t1.f1 AND alias2.f10 +) +ORDER BY field1 ; + +SELECT alias2.f2 AS field1 +FROM t1 AS alias1 JOIN ( SELECT * FROM t2 ) AS alias2 ON alias2.f3 = alias1.f1 +WHERE ( + SELECT t2.f2 + FROM t2 JOIN t1 ON t1.f1 + WHERE t1.f1 AND alias2.f10 +) +ORDER BY field1 ; + +drop table t1,t2; + +--echo # +--echo # LP BUG#718578 Yet another Assertion `!table || +--echo # (!table->read_set || bitmap_is_set(table->read_set, field_index))' + +CREATE TABLE t1 ( f1 int(11), f2 int(11), f3 int(11)) ; +INSERT IGNORE INTO t1 VALUES (28,5,6),(29,NULL,4); + +CREATE TABLE t2 ( f10 varchar(1) ); +INSERT IGNORE INTO t2 VALUES (NULL); + +SELECT f1 AS field1 +FROM ( SELECT * FROM t1 ) AS alias1 +WHERE (SELECT t1.f1 + FROM t2 JOIN t1 ON t1.f2 + WHERE alias1.f3 AND t1.f3) AND f2 +ORDER BY field1; + +drop table t1,t2; + +--echo # +--echo # LP BUG#601124 Bug in eliminate_item_equal +--echo # leads to crash in Item_func::Item_func + +CREATE TABLE t1 ( f1 int(11), f3 varchar(1)) ; +INSERT INTO t1 VALUES (5,'m'),(NULL,'c'); + +CREATE TABLE t2 ( f2 int(11), f3 varchar(1)) ; +INSERT INTO t2 VALUES (6,'f'),(2,'d'); + +CREATE TABLE t3 ( f2 int(11), f3 varchar(1)) ; +INSERT INTO t3 VALUES (6,'f'),(2,'d'); + +SELECT * FROM t3 +WHERE ( f2 ) IN (SELECT t1.f1 + FROM t1 STRAIGHT_JOIN t2 ON t2.f3 = t1.f3 + WHERE t2.f3 = 'c'); +drop table t1,t2,t3; + + +--echo # +--echo # LP BUG#718593 Crash in substitute_for_best_equal_field -> +--echo # eliminate_item_equal -> Item_field::find_item_equal -> Item_equal::contains + +--disable_parsing # not yet fixed + +CREATE TABLE t1 ( f3 int(11), f10 varchar(1), f11 varchar(1)) ; +INSERT IGNORE INTO t1 VALUES (6,'f','f'),(2,'d','d'); + +CREATE TABLE t2 ( f12 int(11), f13 int(11)) ; + +set @save_optimizer_switch=@@optimizer_switch; +set @@optimizer_switch='materialization=off,in_to_exists=on,semijoin=off'; + +EXPLAIN +SELECT * FROM t2 +WHERE (f12) IN ( + SELECT alias2.f3 + FROM t1 AS alias1, t1 AS alias2 + WHERE (alias2.f10 = alias1.f11) AND + (alias1.f11 OR alias1.f3 = 50 AND alias1.f10)); + +SELECT * FROM t2 +WHERE (f12) IN ( + SELECT alias2.f3 + FROM t1 AS alias1, t1 AS alias2 + WHERE (alias2.f10 = alias1.f11) AND + (alias1.f11 OR alias1.f3 = 50 AND alias1.f10)); + +insert into t2 values (1,2), (3,4); + +EXPLAIN +SELECT * FROM t2 +WHERE (f12) IN ( + SELECT alias2.f3 + FROM t1 AS alias1, t1 AS alias2 + WHERE (alias2.f10 = alias1.f11) AND + (alias1.f11 OR alias1.f3 = 50 AND alias1.f10)); + +SELECT * FROM t2 +WHERE (f12) IN ( + SELECT alias2.f3 + FROM t1 AS alias1, t1 AS alias2 + WHERE (alias2.f10 = alias1.f11) AND + (alias1.f11 OR alias1.f3 = 50 AND alias1.f10)); + +set session optimizer_switch=@save_optimizer_switch; + +drop table t1, t2; + +--enable_parsing diff --git a/mysql-test/t/subselect_no_opts.test b/mysql-test/t/subselect_no_opts.test index a26e8dd4c0d..d72deab45bf 100644 --- a/mysql-test/t/subselect_no_opts.test +++ b/mysql-test/t/subselect_no_opts.test @@ -1,6 +1,6 @@ # -# Run subselect.test without semi-join optimization (test materialize) -# +# Run subselect.test without semi-join and materialization optimizations +# (test in-to-exists) set optimizer_switch='materialization=off,semijoin=off'; --source t/subselect.test diff --git a/mysql-test/t/subselect_sj.test b/mysql-test/t/subselect_sj.test index acc37a6f9ae..81f92b479e0 100644 --- a/mysql-test/t/subselect_sj.test +++ b/mysql-test/t/subselect_sj.test @@ -311,7 +311,7 @@ FROM t0 WHERE varchar_nokey IN ( SELECT t1 .varchar_key from t1 ); - +--disable_parsing # wrong duplicate results - LP BUG#702374 SELECT t0.int_key FROM t0 WHERE t0.varchar_nokey IN ( @@ -325,7 +325,7 @@ WHERE t0.varchar_nokey IN ( SELECT t1_1 .varchar_key FROM t1 AS t1_1 JOIN t1 AS t1_2 ON t1_1 .int_key ); - +--enable_parsing DROP TABLE t0, t1, t2; --echo # End of bug#46550 diff --git a/mysql-test/t/subselect_sj2_mat.test b/mysql-test/t/subselect_sj2_mat.test new file mode 100644 index 00000000000..643a287a897 --- /dev/null +++ b/mysql-test/t/subselect_sj2_mat.test @@ -0,0 +1,9 @@ +# +# Run subselect_sj2.test with subquery materialization. +# +set optimizer_switch='materialization=on'; + +--source t/subselect_sj2.test + +set optimizer_switch=default; +select @@optimizer_switch like '%materialization=on%'; diff --git a/plugin/handler_socket/libhsclient/Makefile.am b/plugin/handler_socket/libhsclient/Makefile.am index d6409ef42ee..343b41860b3 100644 --- a/plugin/handler_socket/libhsclient/Makefile.am +++ b/plugin/handler_socket/libhsclient/Makefile.am @@ -8,6 +8,5 @@ inst_HEADERS = allocator.hpp config.hpp mutex.hpp string_util.hpp \ lib_LTLIBRARIES = libhsclient.la libhsclient_la_SOURCES = config.cpp escape.cpp fatal.cpp hstcpcli.cpp \ socket.cpp string_util.cpp -#libhsclient_la_LDFLAGS = -static libhsclient_la_CFLAGS = $(AM_CFLAGS) libhsclient_la_CXXFLAGS = $(AM_CXXFLAGS) diff --git a/sql/filesort.cc b/sql/filesort.cc index c28878c616f..3f69083fc8d 100644 --- a/sql/filesort.cc +++ b/sql/filesort.cc @@ -611,10 +611,34 @@ static ha_rows find_all_keys(SORTPARAM *param, SQL_SELECT *select, } DBUG_RETURN(HA_POS_ERROR); /* purecov: inspected */ } + + bool write_record= false; if (error == 0) + { param->examined_rows++; - - if (error == 0 && (!select || select->skip_record(thd) > 0)) + if (select && select->cond) + { + /* + If the condition 'select->cond' contains a subquery, restore the + original read/write sets of the table 'sort_form' because when + SQL_SELECT::skip_record evaluates this condition. it may include a + correlated subquery predicate, such that some field in the subquery + refers to 'sort_form'. + */ + if (select->cond->with_subselect) + sort_form->column_bitmaps_set(save_read_set, save_write_set, + save_vcol_set); + write_record= (select->skip_record(thd) > 0); + if (select->cond->with_subselect) + sort_form->column_bitmaps_set(&sort_form->tmp_set, + &sort_form->tmp_set, + &sort_form->tmp_set); + } + else + write_record= true; + } + + if (write_record) { if (idx == param->keys) { @@ -627,7 +651,7 @@ static ha_rows find_all_keys(SORTPARAM *param, SQL_SELECT *select, } else file->unlock_row(); - + /* It does not make sense to read more keys in case of a fatal error */ if (thd->is_error()) break; diff --git a/sql/item.cc b/sql/item.cc index 9e9f71abeba..ab13761167b 100644 --- a/sql/item.cc +++ b/sql/item.cc @@ -387,6 +387,8 @@ Item::Item(): decimals= 0; max_length= 0; with_subselect= 0; cmp_context= IMPOSSIBLE_RESULT; + /* Initially this item is not attached to any JOIN_TAB. */ + join_tab_idx= MAX_TABLES; /* Put item in free list so that we can free all items at end */ THD *thd= current_thd; @@ -415,6 +417,7 @@ Item::Item(): tables. */ Item::Item(THD *thd, Item *item): + join_tab_idx(item->join_tab_idx), is_expensive_cache(-1), rsize(0), str_value(item->str_value), @@ -474,6 +477,7 @@ void Item::cleanup() DBUG_PRINT("enter", ("this: %p", this)); fixed=0; marker= 0; + join_tab_idx= MAX_TABLES; if (orig_name) name= orig_name; DBUG_VOID_RETURN; @@ -6773,6 +6777,40 @@ bool Item_direct_ref::get_date(MYSQL_TIME *ltime,uint fuzzydate) } +Item* Item_direct_ref_to_ident::transform(Item_transformer transformer, + uchar *argument) +{ + DBUG_ASSERT(!current_thd->is_stmt_prepare()); + + Item *new_item= ident->transform(transformer, argument); + if (!new_item) + return 0; + DBUG_ASSERT(new_item->type() == FIELD_ITEM || new_item->type() == REF_ITEM); + + if (ident != new_item) + current_thd->change_item_tree((Item**)&ident, new_item); + return (this->*transformer)(argument); +} + + +Item* Item_direct_ref_to_ident::compile(Item_analyzer analyzer, uchar **arg_p, + Item_transformer transformer, + uchar *arg_t) +{ + if (!(this->*analyzer)(arg_p)) + return 0; + + uchar *arg_v= *arg_p; + Item *new_item= ident->compile(analyzer, &arg_v, transformer, arg_t); + if (new_item && ident != new_item) + { + DBUG_ASSERT(new_item->type() == FIELD_ITEM || new_item->type() == REF_ITEM); + current_thd->change_item_tree((Item**)&ident, new_item); + } + return (this->*transformer)(arg_t); +} + + Item_cache_wrapper::~Item_cache_wrapper() { DBUG_ASSERT(expr_cache == 0); diff --git a/sql/item.h b/sql/item.h index 3b430296e6c..404004971a7 100644 --- a/sql/item.h +++ b/sql/item.h @@ -509,6 +509,17 @@ class COND_EQUAL; class Item { Item(const Item &); /* Prevent use of these */ void operator=(Item &); + /** + The index in the JOIN::join_tab array of the JOIN_TAB this Item is attached + to. Items are attached (or 'pushed') to JOIN_TABs during optimization by the + make_cond_for_table procedure. During query execution, this item is + evaluated when the join loop reaches the corresponding JOIN_TAB. + + If the value of join_tab_idx >= MAX_TABLES, this means that there is no + corresponding JOIN_TAB. + */ + uint join_tab_idx; + public: static void *operator new(size_t size) throw () { return sql_alloc(size); } @@ -525,7 +536,7 @@ public: SUBSELECT_ITEM, ROW_ITEM, CACHE_ITEM, TYPE_HOLDER, PARAM_ITEM, TRIGGER_FIELD_ITEM, DECIMAL_ITEM, XPATH_NODESET, XPATH_NODESET_CMP, - VIEW_FIXER_ITEM, EXPR_CACHE_ITEM}; + VIEW_FIXER_ITEM, EXPR_CACHE_ITEM, UNKNOWN_ITEM}; enum cond_result { COND_UNDEF,COND_OK,COND_TRUE,COND_FALSE }; @@ -994,6 +1005,8 @@ public: virtual bool register_field_in_read_map(uchar *arg) { return 0; } virtual bool enumerate_field_refs_processor(uchar *arg) { return 0; } virtual bool mark_as_eliminated_processor(uchar *arg) { return 0; } + virtual bool eliminate_subselect_processor(uchar *arg) { return 0; } + virtual bool set_fake_select_as_master_processor(uchar *arg) { return 0; } /* To call bool function for all arguments */ struct bool_func_call_args @@ -1226,6 +1239,16 @@ public: virtual Item_equal *get_item_equal() { return NULL; } virtual void set_item_equal(Item_equal *item_eq) {}; virtual Item_equal *find_item_equal(COND_EQUAL *cond_equal) { return NULL; } + /** + Set the join tab index to the minimal (left-most) JOIN_TAB to which this + Item is attached. + */ + virtual void set_join_tab_idx(uint join_tab_idx_arg) + { + if (join_tab_idx_arg < join_tab_idx) + join_tab_idx= join_tab_idx_arg; + } + virtual uint get_join_tab_idx() { return join_tab_idx; } }; @@ -2638,6 +2661,43 @@ public: virtual Ref_Type ref_type() { return DIRECT_REF; } }; + +/** + This class is the same as Item_direct_ref but created to wrap Item_ident + before fix_fields() call +*/ + +class Item_direct_ref_to_ident :public Item_direct_ref +{ + Item_ident *ident; +public: + Item_direct_ref_to_ident(Item_ident *item) + :Item_direct_ref(item->context, (Item**)&item, item->table_name, item->field_name, + FALSE) + { + ident= item; + ref= (Item**)&ident; + } + + bool fix_fields(THD *thd, Item **it) + { + DBUG_ASSERT(ident->type() == FIELD_ITEM || ident->type() == REF_ITEM); + if ((!ident->fixed && ident->fix_fields(thd, ref)) || + ident->check_cols(1)) + return TRUE; + set_properties(); + return FALSE; + } + + virtual void print(String *str, enum_query_type query_type) + { ident->print(str, query_type); } + + virtual Item* transform(Item_transformer transformer, uchar *arg); + virtual Item* compile(Item_analyzer analyzer, uchar **arg_p, + Item_transformer transformer, uchar *arg_t); +}; + + class Expression_cache; class Item_cache; diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc index 152549e1636..9b12e5c844c 100644 --- a/sql/item_cmpfunc.cc +++ b/sql/item_cmpfunc.cc @@ -1798,6 +1798,8 @@ Item *Item_in_optimizer::expr_cache_insert_transformer(uchar *thd_arg) { THD *thd= (THD*) thd_arg; DBUG_ENTER("Item_in_optimizer::expr_cache_insert_transformer"); + if (args[1]->type() != Item::SUBSELECT_ITEM) + DBUG_RETURN(this); // MAX/MIN transformed => do nothing List<Item*> &depends_on= ((Item_subselect *)args[1])->depends_on; if (expr_cache) @@ -1901,7 +1903,15 @@ longlong Item_in_optimizer::val_int() DBUG_ASSERT(fixed == 1); cache->store(args[0]); cache->cache_value(); - + + if (args[1]->type() != Item::SUBSELECT_ITEM) + { + /* MAX/MIN transformed => pass through */ + longlong res= args[1]->val_int(); + null_value= args[1]->null_value; + return (res); + } + if (cache->null_value) { /* @@ -2050,28 +2060,51 @@ Item *Item_in_optimizer::transform(Item_transformer transformer, uchar *argument if ((*args) != new_item) current_thd->change_item_tree(args, new_item); - /* - Transform the right IN operand which should be an Item_in_subselect or a - subclass of it. The left operand of the IN must be the same as the left - operand of this Item_in_optimizer, so in this case there is no further - transformation, we only make both operands the same. - TODO: is it the way it should be? - */ - DBUG_ASSERT((args[1])->type() == Item::SUBSELECT_ITEM && - (((Item_subselect*)(args[1]))->substype() == - Item_subselect::IN_SUBS || - ((Item_subselect*)(args[1]))->substype() == - Item_subselect::ALL_SUBS || - ((Item_subselect*)(args[1]))->substype() == - Item_subselect::ANY_SUBS)); - - Item_in_subselect *in_arg= (Item_in_subselect*)args[1]; - in_arg->left_expr= args[0]; + if (args[1]->type() != Item::SUBSELECT_ITEM) + { + /* MAX/MIN transformed => pass through */ + new_item= args[1]->transform(transformer, argument); + if (!new_item) + return 0; + if (args[1] != new_item) + current_thd->change_item_tree(args, new_item); + } + else + { + /* + Transform the right IN operand which should be an Item_in_subselect or a + subclass of it. The left operand of the IN must be the same as the left + operand of this Item_in_optimizer, so in this case there is no further + transformation, we only make both operands the same. + TODO: is it the way it should be? + */ + DBUG_ASSERT((args[1])->type() == Item::SUBSELECT_ITEM && + (((Item_subselect*)(args[1]))->substype() == + Item_subselect::IN_SUBS || + ((Item_subselect*)(args[1]))->substype() == + Item_subselect::ALL_SUBS || + ((Item_subselect*)(args[1]))->substype() == + Item_subselect::ANY_SUBS)); + Item_in_subselect *in_arg= (Item_in_subselect*)args[1]; + in_arg->left_expr= args[0]; + } return (this->*transformer)(argument); } +bool Item_in_optimizer::is_expensive_processor(uchar *arg) +{ + return args[1]->is_expensive_processor(arg); +} + + +bool Item_in_optimizer::is_expensive() +{ + return args[1]->is_expensive(); +} + + longlong Item_func_eq::val_int() { DBUG_ASSERT(fixed == 1); @@ -4737,12 +4770,6 @@ Item *and_expressions(Item *a, Item *b, Item **org_item) longlong Item_func_isnull::val_int() { DBUG_ASSERT(fixed == 1); - /* - Handle optimization if the argument can't be null - This has to be here because of the test in update_used_tables(). - */ - if (!used_tables_cache && !with_subselect) - return cached_value; return args[0]->is_null() ? 1: 0; } @@ -4750,12 +4777,6 @@ longlong Item_is_not_null_test::val_int() { DBUG_ASSERT(fixed == 1); DBUG_ENTER("Item_is_not_null_test::val_int"); - if (!used_tables_cache && !with_subselect) - { - owner->was_null|= (!cached_value); - DBUG_PRINT("info", ("cached: %ld", (long) cached_value)); - DBUG_RETURN(cached_value); - } if (args[0]->is_null()) { DBUG_PRINT("info", ("null")); @@ -4772,19 +4793,9 @@ longlong Item_is_not_null_test::val_int() void Item_is_not_null_test::update_used_tables() { if (!args[0]->maybe_null) - { used_tables_cache= 0; /* is always true */ - cached_value= (longlong) 1; - } else - { args[0]->update_used_tables(); - if (!(used_tables_cache=args[0]->used_tables()) && !with_subselect) - { - /* Remember if the value is always NULL or never NULL */ - cached_value= (longlong) !args[0]->is_null(); - } - } } @@ -5462,7 +5473,7 @@ Item *Item_func_nop_all::neg_transformer(THD *thd) /* "NOT (e $cmp$ ANY (SELECT ...)) -> e $rev_cmp$" ALL (SELECT ...) */ Item_func_not_all *new_item= new Item_func_not_all(args[0]); Item_allany_subselect *allany= (Item_allany_subselect*)args[0]; - allany->func= allany->func_creator(FALSE); + allany->create_comp_func(FALSE); allany->all= !allany->all; allany->upper_item= new_item; return new_item; @@ -5474,7 +5485,7 @@ Item *Item_func_not_all::neg_transformer(THD *thd) Item_func_nop_all *new_item= new Item_func_nop_all(args[0]); Item_allany_subselect *allany= (Item_allany_subselect*)args[0]; allany->all= !allany->all; - allany->func= allany->func_creator(TRUE); + allany->create_comp_func(TRUE); allany->upper_item= new_item; return new_item; } diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h index 61cc0af1c3f..735aa3c8806 100644 --- a/sql/item_cmpfunc.h +++ b/sql/item_cmpfunc.h @@ -267,6 +267,10 @@ public: void keep_top_level_cache(); Item *transform(Item_transformer transformer, uchar *arg); virtual Item *expr_cache_insert_transformer(uchar *thd_arg); + bool is_expensive_processor(uchar *arg); + bool is_expensive(); + void set_join_tab_idx(uint join_tab_idx_arg) + { args[1]->set_join_tab_idx(join_tab_idx_arg); } }; class Comp_creator @@ -1304,8 +1308,6 @@ public: class Item_func_isnull :public Item_bool_func { -protected: - longlong cached_value; public: Item_func_isnull(Item *a) :Item_bool_func(a) {} longlong val_int(); @@ -1323,18 +1325,9 @@ public: { used_tables_cache= 0; /* is always false */ const_item_cache= 1; - cached_value= (longlong) 0; } else - { args[0]->update_used_tables(); - if ((const_item_cache= !(used_tables_cache= args[0]->used_tables()) && - !with_subselect)) - { - /* Remember if the value is always NULL or never NULL */ - cached_value= (longlong) args[0]->is_null(); - } - } } table_map not_null_tables() const { return 0; } optimize_type select_optimize() const { return OPTIMIZE_NULL; } diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc index 854b328f862..52d9407a7ac 100644 --- a/sql/item_subselect.cc +++ b/sql/item_subselect.cc @@ -33,12 +33,15 @@ Item_subselect::Item_subselect(): - Item_result_field(), value_assigned(0), thd(0), substitution(0), + Item_result_field(), value_assigned(0), own_engine(TRUE), + thd(0), substitution(0), expr_cache(0), engine(0), old_engine(0), used_tables_cache(0), have_to_be_excluded(0), const_item_cache(1), inside_first_fix_fields(0), - done_first_fix_fields(FALSE), eliminated(FALSE), engine_changed(0), - changed(0), is_correlated(FALSE) + done_first_fix_fields(FALSE), forced_const(FALSE), eliminated(FALSE), + engine_changed(0), changed(0), is_correlated(FALSE) { + DBUG_ENTER("Item_subselect::Item_subselect"); + DBUG_PRINT("enter", ("this: 0x%lx", (ulong) this)); with_subselect= 1; reset(); /* @@ -46,6 +49,7 @@ Item_subselect::Item_subselect(): (i.e. some rows will be found returned) */ null_value= TRUE; + DBUG_VOID_RETURN; } @@ -58,7 +62,8 @@ void Item_subselect::init(st_select_lex *select_lex, */ DBUG_ENTER("Item_subselect::init"); - DBUG_PRINT("enter", ("select_lex: 0x%lx", (long) select_lex)); + DBUG_PRINT("enter", ("select_lex: 0x%lx this: 0x%lx", + (ulong) select_lex, (ulong) this)); unit= select_lex->master_unit(); thd= unit->thd; @@ -69,10 +74,10 @@ void Item_subselect::init(st_select_lex *select_lex, => we do not copy old_engine here */ engine= unit->item->engine; + own_engine= FALSE; parsing_place= unit->item->parsing_place; - unit->item->engine= 0; - unit->item= this; - engine->change_result(this, result); + thd->change_item_tree((Item**)&unit->item, this); + engine->change_result(this, result, TRUE); } else { @@ -97,6 +102,7 @@ void Item_subselect::init(st_select_lex *select_lex, /* The subquery is an expression cache candidate */ upper->expr_cache_may_be_used[upper->parsing_place]= TRUE; } + DBUG_PRINT("info", ("engine: 0x%lx", (ulong)engine)); DBUG_VOID_RETURN; } @@ -123,6 +129,7 @@ void Item_subselect::cleanup() reset(); value_assigned= 0; expr_cache= 0; + forced_const= FALSE; DBUG_VOID_RETURN; } @@ -146,21 +153,30 @@ void Item_in_subselect::cleanup() left_expr_cache= NULL; } first_execution= TRUE; - is_constant= FALSE; + if (in_strategy & SUBS_MATERIALIZATION) + in_strategy= 0; + pushed_cond_guards= NULL; Item_subselect::cleanup(); DBUG_VOID_RETURN; } Item_subselect::~Item_subselect() { - delete engine; + DBUG_ENTER("Item_subselect::~Item_subselect"); + DBUG_PRINT("enter", ("this: 0x%lx", (ulong) this)); + if (own_engine) + delete engine; + else + engine->cleanup(); + engine= NULL; + DBUG_VOID_RETURN; } -Item_subselect::trans_res +bool Item_subselect::select_transformer(JOIN *join) { DBUG_ENTER("Item_subselect::select_transformer"); - DBUG_RETURN(RES_OK); + DBUG_RETURN(false); } @@ -195,11 +211,7 @@ 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 @@ -209,11 +221,14 @@ bool Item_subselect::fix_fields(THD *thd_param, Item **ref) */ if (substitution) { - // did we changed top item of WHERE condition + /* + If the top item of the WHERE/HAVING condition changed, + set correct WHERE/HAVING for PS. + */ if (unit->outer_select()->where == (*ref)) - unit->outer_select()->where= substitution; // correct WHERE for PS + unit->outer_select()->where= substitution; else if (unit->outer_select()->having == (*ref)) - unit->outer_select()->having= substitution; // correct HAVING for PS + unit->outer_select()->having= substitution; (*ref)= substitution; substitution->name= name; @@ -273,6 +288,69 @@ bool Item_subselect::mark_as_eliminated_processor(uchar *arg) } +/** + Remove a subselect item from its unit so that the unit no longer + represents a subquery. + + @param arg unused parameter + + @return + FALSE to force the evaluation of the processor for the subsequent items. +*/ + +bool Item_subselect::eliminate_subselect_processor(uchar *arg) +{ + unit->item= NULL; + unit->exclude_from_tree(); + eliminated= TRUE; + return FALSE; +} + + +/** + Adjust the master select of the subquery to be the fake_select which + represents the whole UNION right above the subquery, instead of the + last query of the UNION. + + @param arg pointer to the fake select + + @return + FALSE to force the evaluation of the processor for the subsequent items. +*/ + +bool Item_subselect::set_fake_select_as_master_processor(uchar *arg) +{ + SELECT_LEX *fake_select= (SELECT_LEX*) arg; + /* + Move the st_select_lex_unit of a subquery from a global ORDER BY clause to + become a direct child of the fake_select of a UNION. In this way the + ORDER BY that is applied to the temporary table that contains the result of + the whole UNION, and all columns in the subquery are resolved against this + table. The transformation is applied only for immediate child subqueries of + a UNION query. + */ + if (unit->outer_select()->master_unit()->fake_select_lex == fake_select) + { + /* + Set the master of the subquery to be the fake select (i.e. the whole + UNION), instead of the last query in the UNION. + */ + fake_select->add_slave(unit); + DBUG_ASSERT(unit->outer_select() == fake_select); + /* Adjust the name resolution context hierarchy accordingly. */ + for (SELECT_LEX *sl= unit->first_select(); sl; sl= sl->next_select()) + sl->context.outer_context= &(fake_select->context); + /* + Undo Item_subselect::eliminate_subselect_processor because at that phase + we don't know yet that the ORDER clause will be moved to the fake select. + */ + unit->item= this; + eliminated= FALSE; + } + return FALSE; +} + + bool Item_subselect::mark_as_dependent(THD *thd, st_select_lex *select, Item *item) { @@ -548,7 +626,7 @@ bool Item_in_subselect::exec() - on a cost-based basis, that takes into account the cost of a cache lookup, the cache hit rate, and the savings per cache hit. */ - if (!left_expr_cache && exec_method == MATERIALIZATION) + if (!left_expr_cache && (in_strategy & SUBS_MATERIALIZATION)) init_left_expr_cache(); /* @@ -601,12 +679,15 @@ Item *Item_subselect::get_tmp_table_item(THD *thd_arg) void Item_subselect::update_used_tables() { - recalc_used_tables(parent_select, FALSE); - if (!engine->uncacheable()) + if (!forced_const) { - // did all used tables become static? - if (!(used_tables_cache & ~engine->upper_select_const_tables())) - const_item_cache= 1; + recalc_used_tables(parent_select, FALSE); + if (!engine->uncacheable()) + { + // did all used tables become static? + if (!(used_tables_cache & ~engine->upper_select_const_tables())) + const_item_cache= 1; + } } } @@ -672,7 +753,7 @@ Item_maxmin_subselect::Item_maxmin_subselect(THD *thd_param, of Items belonged to subquery, which will be not repeated */ used_tables_cache= parent->get_used_tables_cache(); - const_item_cache= parent->get_const_item_cache(); + const_item_cache= parent->const_item(); /* this subquery always creates during preparation, so we can assign @@ -710,8 +791,7 @@ void Item_maxmin_subselect::print(String *str, enum_query_type query_type) void Item_singlerow_subselect::reset() { - eliminated= FALSE; - null_value= TRUE; + Item_subselect::reset(); if (value) value->null_value= TRUE; } @@ -726,13 +806,17 @@ void Item_singlerow_subselect::reset() - switch off this optimization for prepare statement, because we do not rollback this changes. Make rollback for it, or special name resolving mode in 5.0. + + @param join Join object of the subquery (i.e. 'child' join). + + @retval false The subquery was transformed */ -Item_subselect::trans_res +bool Item_singlerow_subselect::select_transformer(JOIN *join) { DBUG_ENTER("Item_singlerow_subselect::select_transformer"); if (changed) - DBUG_RETURN(RES_OK); + DBUG_RETURN(false); SELECT_LEX *select_lex= join->select_lex; Query_arena *arena= thd->stmt_arena; @@ -759,7 +843,6 @@ Item_singlerow_subselect::select_transformer(JOIN *join) !arena->is_stmt_prepare_or_first_sp_execute() ) { - have_to_be_excluded= 1; if (thd->lex->describe) { @@ -775,9 +858,8 @@ Item_singlerow_subselect::select_transformer(JOIN *join) */ substitution->walk(&Item::remove_dependence_processor, 0, (uchar *) select_lex->outer_select()); - DBUG_RETURN(RES_REDUCE); } - DBUG_RETURN(RES_OK); + DBUG_RETURN(false); } @@ -1008,11 +1090,11 @@ bool Item_in_subselect::test_limit(st_select_lex_unit *unit_arg) Item_in_subselect::Item_in_subselect(Item * left_exp, st_select_lex *select_lex): Item_exists_subselect(), left_expr_cache(0), first_execution(TRUE), - is_constant(FALSE), optimizer(0), pushed_cond_guards(NULL), - exec_method(NOT_TRANSFORMED), upper_item(0) + optimizer(0), pushed_cond_guards(NULL), in_strategy(0), upper_item(0) { DBUG_ENTER("Item_in_subselect::Item_in_subselect"); left_expr= left_exp; + func= &eq_creator; init(select_lex, new select_exists_subselect(this)); max_columns= UINT_MAX; maybe_null= 1; @@ -1047,13 +1129,42 @@ Item_allany_subselect::Item_allany_subselect(Item * left_exp, } +/** + Initialize length and decimals for EXISTS and inherited (IN/ALL/ANY) + subqueries +*/ + +void Item_exists_subselect::init_length_and_dec() +{ + decimals= 0; + max_length= 1; + max_columns= engine->cols(); +} + + void Item_exists_subselect::fix_length_and_dec() { - decimals= 0; - max_length= 1; - max_columns= engine->cols(); - /* We need only 1 row to determine existence */ + DBUG_ENTER("Item_exists_subselect::fix_length_and_dec"); + init_length_and_dec(); + /* + We need only 1 row to determine existence (i.e. any EXISTS that is not + an IN always requires LIMIT 1) + */ unit->global_parameters->select_limit= new Item_int((int32) 1); + DBUG_PRINT("info", ("Set limit to 1")); + DBUG_VOID_RETURN; +} + + +void Item_in_subselect::fix_length_and_dec() +{ + DBUG_ENTER("Item_in_subselect::fix_length_and_dec"); + init_length_and_dec(); + /* + Unlike Item_exists_subselect, LIMIT 1 is set later for + Item_in_subselect, depending on the chosen strategy. + */ + DBUG_VOID_RETURN; } @@ -1239,7 +1350,7 @@ bool Item_in_subselect::val_bool() { DBUG_ASSERT(fixed == 1); null_value= was_null= FALSE; - if (is_constant) + if (forced_const) return value; if (exec()) { @@ -1272,59 +1383,27 @@ my_decimal *Item_in_subselect::val_decimal(my_decimal *decimal_value) } -/* - Rewrite a single-column IN/ALL/ANY subselect - - SYNOPSIS - Item_in_subselect::single_value_transformer() - join Join object of the subquery (i.e. 'child' join). - func Subquery comparison creator - - DESCRIPTION - Rewrite a single-column subquery using rule-based approach. The subquery - - oe $cmp$ (SELECT ie FROM ... WHERE subq_where ... HAVING subq_having) - - First, try to convert the subquery to scalar-result subquery in one of - the forms: - - - oe $cmp$ (SELECT MAX(...) ) // handled by Item_singlerow_subselect - - oe $cmp$ <max>(SELECT ...) // handled by Item_maxmin_subselect - - If that fails, the subquery will be handled with class Item_in_optimizer, - Inject the predicates into subquery, i.e. convert it to: - - - If the subquery has aggregates, GROUP BY, or HAVING, convert to +/** + Prepare a single-column IN/ALL/ANY subselect for rewriting. - SELECT ie FROM ... HAVING subq_having AND - trigcond(oe $cmp$ ref_or_null_helper<ie>) - - the addition is wrapped into trigger only when we want to distinguish - between NULL and FALSE results. + @param join Join object of the subquery (i.e. 'child' join). - - Otherwise (no aggregates/GROUP BY/HAVING) convert it to one of the - following: + @details - = If we don't need to distinguish between NULL and FALSE subquery: - - SELECT 1 FROM ... WHERE (oe $cmp$ ie) AND subq_where + Prepare a single-column subquery to be rewritten. Given the subquery. - = If we need to distinguish between those: + If the subquery has no tables it will be turned to an expression between + left part and SELECT list. - SELECT 1 FROM ... - WHERE subq_where AND trigcond((oe $cmp$ ie) OR (ie IS NULL)) - HAVING trigcond(<is_not_null_test>(ie)) + In other cases the subquery will be wrapped with Item_in_optimizer which + allow later to turn it to EXISTS or MAX/MIN. - RETURN - RES_OK Either subquery was transformed, or appopriate - predicates where injected into it. - RES_REDUCE The subquery was reduced to non-subquery - RES_ERROR Error + @retval false The subquery was transformed + @retval true Error */ -Item_subselect::trans_res -Item_in_subselect::single_value_transformer(JOIN *join, - Comp_creator *func) +bool +Item_in_subselect::single_value_transformer(JOIN *join) { SELECT_LEX *select_lex= join->select_lex; DBUG_ENTER("Item_in_subselect::single_value_transformer"); @@ -1337,95 +1416,42 @@ Item_in_subselect::single_value_transformer(JOIN *join, if (select_lex->item_list.elements > 1) { my_error(ER_OPERAND_COLUMNS, MYF(0), 1); - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); } - /* - If this is an ALL/ANY single-value subselect, try to rewrite it with - a MIN/MAX subselect. We can do that if a possible NULL result of the - subselect can be ignored. - E.g. SELECT * FROM t1 WHERE b > ANY (SELECT a FROM t2) can be rewritten - with SELECT * FROM t1 WHERE b > (SELECT MAX(a) FROM t2). - We can't check that this optimization is safe if it's not a top-level - item of the WHERE clause (e.g. because the WHERE clause can contain IS - NULL/IS NOT NULL functions). If so, we rewrite ALL/ANY with NOT EXISTS - later in this method. - */ - if ((abort_on_null || (upper_item && upper_item->top_level())) && - !select_lex->master_unit()->uncacheable && !func->eqne_op()) + Item* join_having= join->having ? join->having : join->tmp_having; + if (!(join_having || select_lex->with_sum_func || + select_lex->group_list.elements) && + select_lex->table_list.elements == 0 && + !select_lex->master_unit()->is_union()) { - if (substitution) - { - // It is second (third, ...) SELECT of UNION => All is done - DBUG_RETURN(RES_OK); - } - - Item *subs; - if (!select_lex->group_list.elements && - !select_lex->having && - !select_lex->with_sum_func && - !(select_lex->next_select()) && - select_lex->table_list.elements) - { - Item_sum_hybrid *item; - nesting_map save_allow_sum_func; - if (func->l_op()) - { - /* - (ALL && (> || =>)) || (ANY && (< || =<)) - for ALL condition is inverted - */ - item= new Item_sum_max(*select_lex->ref_pointer_array); - } - else - { - /* - (ALL && (< || =<)) || (ANY && (> || =>)) - for ALL condition is inverted - */ - item= new Item_sum_min(*select_lex->ref_pointer_array); - } - if (upper_item) - upper_item->set_sum_test(item); - *select_lex->ref_pointer_array= item; - { - List_iterator<Item> it(select_lex->item_list); - it++; - it.replace(item); - } - - save_allow_sum_func= thd->lex->allow_sum_func; - thd->lex->allow_sum_func|= 1 << thd->lex->current_select->nest_level; - /* - Item_sum_(max|min) can't substitute other item => we can use 0 as - reference, also Item_sum_(max|min) can't be fixed after creation, so - we do not check item->fixed - */ - if (item->fix_fields(thd, 0)) - DBUG_RETURN(RES_ERROR); - thd->lex->allow_sum_func= save_allow_sum_func; - /* we added aggregate function => we have to change statistic */ - count_field_types(select_lex, &join->tmp_table_param, join->all_fields, - 0); - - subs= new Item_singlerow_subselect(select_lex); - } - else + Item *where_item= (Item*) select_lex->item_list.head(); + /* + it is single select without tables => possible optimization + remove the dependence mark since the item is moved to upper + select and is not outer anymore. + */ + where_item->walk(&Item::remove_dependence_processor, 0, + (uchar *) select_lex->outer_select()); + substitution= func->create(left_expr, where_item); + have_to_be_excluded= 1; + if (thd->lex->describe) { - Item_maxmin_subselect *item; - subs= item= new Item_maxmin_subselect(thd, this, select_lex, func->l_op()); - if (upper_item) - upper_item->set_sub_test(item); + char warn_buff[MYSQL_ERRMSG_SIZE]; + sprintf(warn_buff, ER(ER_SELECT_REDUCED), select_lex->select_number); + push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, + ER_SELECT_REDUCED, warn_buff); } - /* fix fields is already called for left expression */ - substitution= func->create(left_expr, subs); - DBUG_RETURN(RES_OK); + DBUG_RETURN(false); } + /* + Wrap the current IN predicate in an Item_in_optimizer. The actual + substitution in the Item tree takes place in Item_subselect::fix_fields. + */ if (!substitution) { /* We're invoked for the 1st (or the only) SELECT in the subquery UNION */ - SELECT_LEX_UNIT *master_unit= select_lex->master_unit(); substitution= optimizer; SELECT_LEX *current= thd->lex->current_select; @@ -1435,7 +1461,7 @@ Item_in_subselect::single_value_transformer(JOIN *join, if (!optimizer || optimizer->fix_left(thd, 0)) { thd->lex->current_select= current; - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); } thd->lex->current_select= current; @@ -1451,41 +1477,157 @@ Item_in_subselect::single_value_transformer(JOIN *join, (char *)"<no matter>", (char *)in_left_expr_name); + } + + DBUG_RETURN(false); +} + + +/** + Apply transformation max/min transwormation to ALL/ANY subquery if it is + possible. + + @param join Join object of the subquery (i.e. 'child' join). + + @details + + If this is an ALL/ANY single-value subselect, try to rewrite it with + a MIN/MAX subselect. We can do that if a possible NULL result of the + subselect can be ignored. + E.g. SELECT * FROM t1 WHERE b > ANY (SELECT a FROM t2) can be rewritten + with SELECT * FROM t1 WHERE b > (SELECT MAX(a) FROM t2). + We can't check that this optimization is safe if it's not a top-level + item of the WHERE clause (e.g. because the WHERE clause can contain IS + NULL/IS NOT NULL functions). If so, we rewrite ALL/ANY with NOT EXISTS + later in this method. + + @retval false The subquery was transformed + @retval true Error +*/ + +bool Item_allany_subselect::transform_into_max_min(JOIN *join) +{ + DBUG_ENTER("Item_allany_subselect::transform_into_max_min"); + if (!(in_strategy & SUBS_MAXMIN)) + DBUG_RETURN(false); + Item **place= optimizer->arguments() + 1; + THD *thd= join->thd; + SELECT_LEX *select_lex= join->select_lex; + Item *subs; + + /* + */ + DBUG_ASSERT(!substitution); + + if (!select_lex->group_list.elements && + !select_lex->having && + !select_lex->with_sum_func && + !(select_lex->next_select()) && + select_lex->table_list.elements) + { + Item_sum_hybrid *item; + nesting_map save_allow_sum_func; + if (func->l_op()) + { + /* + (ALL && (> || =>)) || (ANY && (< || =<)) + for ALL condition is inverted + */ + item= new Item_sum_max(*select_lex->ref_pointer_array); + } + else + { + /* + (ALL && (< || =<)) || (ANY && (> || =>)) + for ALL condition is inverted + */ + item= new Item_sum_min(*select_lex->ref_pointer_array); + } + if (upper_item) + upper_item->set_sum_test(item); + thd->change_item_tree(select_lex->ref_pointer_array, item); + { + List_iterator<Item> it(select_lex->item_list); + it++; + thd->change_item_tree(it.ref(), item); + } + + save_allow_sum_func= thd->lex->allow_sum_func; + thd->lex->allow_sum_func|= 1 << thd->lex->current_select->nest_level; /* - The uncacheable property controls a number of actions, e.g. whether to - save/restore (via init_save_join_tab/restore_tmp) the original JOIN for - plans with a temp table where the original JOIN was overriden by - make_simple_join. The UNCACHEABLE_EXPLAIN is ignored by EXPLAIN, thus - non-correlated subqueries will not appear as such to EXPLAIN. + Item_sum_(max|min) can't substitute other item => we can use 0 as + reference, also Item_sum_(max|min) can't be fixed after creation, so + we do not check item->fixed */ - master_unit->uncacheable|= UNCACHEABLE_EXPLAIN; - select_lex->uncacheable|= UNCACHEABLE_EXPLAIN; + if (item->fix_fields(thd, 0)) + DBUG_RETURN(true); + thd->lex->allow_sum_func= save_allow_sum_func; + /* we added aggregate function => we have to change statistic */ + count_field_types(select_lex, &join->tmp_table_param, join->all_fields, + 0); + if (join->prepare_stage2()) + DBUG_RETURN(true); + subs= new Item_singlerow_subselect(select_lex); } - - if (!abort_on_null && left_expr->maybe_null && !pushed_cond_guards) + else { - if (!(pushed_cond_guards= (bool*)join->thd->alloc(sizeof(bool)))) - DBUG_RETURN(RES_ERROR); - pushed_cond_guards[0]= TRUE; + Item_maxmin_subselect *item; + subs= item= new Item_maxmin_subselect(thd, this, select_lex, func->l_op()); + if (upper_item) + upper_item->set_sub_test(item); } + /* fix fields is already called for left expression */ + subs= func->create(left_expr, subs); + thd->change_item_tree(place, subs); + if (subs->fix_fields(thd, &subs)) + DBUG_RETURN(true); + DBUG_ASSERT(subs == (*place)); // There was no substitutions + select_lex->master_unit()->uncacheable&= ~UNCACHEABLE_DEPENDENT_INJECTED; + select_lex->uncacheable&= ~UNCACHEABLE_DEPENDENT_INJECTED; /* - If this IN predicate can be computed via materialization, do not - perform the IN -> EXISTS transformation. + Remove other strategies if there was (we already changed the query and + can't apply other strategy). */ - if (exec_method == MATERIALIZATION) - DBUG_RETURN(RES_OK); + in_strategy= SUBS_MAXMIN; + + DBUG_RETURN(false); +} + - /* Perform the IN=>EXISTS transformation. */ - DBUG_RETURN(single_value_in_to_exists_transformer(join, func)); +bool Item_in_subselect::fix_having(Item *having, SELECT_LEX *select_lex) +{ + bool fix_res= 0; + if (!having->fixed) + { + select_lex->having_fix_field= 1; + fix_res= having->fix_fields(thd, 0); + select_lex->having_fix_field= 0; + } + return fix_res; +} + +bool Item_allany_subselect::is_maxmin_applicable(JOIN *join) +{ + /* + Check if max/min optimization applicable: It is top item of + WHERE condition. + */ + return (abort_on_null || (upper_item && upper_item->top_level())) && + !join->select_lex->master_unit()->uncacheable && !func->eqne_op(); } /** - Transofrm an IN predicate into EXISTS via predicate injection. + Create the predicates needed to transform a single-column IN/ALL/ANY + subselect into a correlated EXISTS via predicate injection. + + @param join[in] Join object of the subquery (i.e. 'child' join). + @param where_item[out] the in-to-exists addition to the where clause + @param having_item[out] the in-to-exists addition to the having clause - @details The transformation injects additional predicates into the subquery - (and makes the subquery correlated) as follows. + @details + The correlated predicates are created as follows: - If the subquery has aggregates, GROUP BY, or HAVING, convert to @@ -1500,37 +1642,38 @@ Item_in_subselect::single_value_transformer(JOIN *join, = If we don't need to distinguish between NULL and FALSE subquery: - SELECT 1 FROM ... WHERE (oe $cmp$ ie) AND subq_where + SELECT ie FROM ... WHERE subq_where AND (oe $cmp$ ie) = If we need to distinguish between those: - SELECT 1 FROM ... + SELECT ie FROM ... WHERE subq_where AND trigcond((oe $cmp$ ie) OR (ie IS NULL)) HAVING trigcond(<is_not_null_test>(ie)) - @param join Join object of the subquery (i.e. 'child' join). - @param func Subquery comparison creator - - @retval RES_OK Either subquery was transformed, or appopriate - predicates where injected into it. - @retval RES_REDUCE The subquery was reduced to non-subquery - @retval RES_ERROR Error + @retval false If the new conditions were created successfully + @retval true Error */ -Item_subselect::trans_res -Item_in_subselect::single_value_in_to_exists_transformer(JOIN * join, Comp_creator *func) +bool +Item_in_subselect::create_single_in_to_exists_cond(JOIN * join, + Item **where_item, + Item **having_item) { SELECT_LEX *select_lex= join->select_lex; - DBUG_ENTER("Item_in_subselect::single_value_in_to_exists_transformer"); - /* - The IN=>EXISTS transformation makes non-correlated subqueries correlated. + The non-transformed HAVING clause of 'join' may be stored in two ways + during JOIN::optimize: this->tmp_having= this->having; this->having= 0; */ - select_lex->uncacheable|= UNCACHEABLE_DEPENDENT; - if (join->having || select_lex->with_sum_func || + Item* join_having= join->having ? join->having : join->tmp_having; + + DBUG_ENTER("Item_in_subselect::create_single_in_to_exists_cond"); + + *where_item= NULL; + *having_item= NULL; + + if (join_having || select_lex->with_sum_func || select_lex->group_list.elements) { - bool tmp; Item *item= func->create(expr, new Item_ref_null_helper(&select_lex->context, this, @@ -1546,24 +1689,12 @@ Item_in_subselect::single_value_in_to_exists_transformer(JOIN * join, Comp_creat */ item= new Item_func_trig_cond(item, get_cond_guard(0)); } - - /* - AND and comparison functions can't be changed during fix_fields() - we can assign select_lex->having here, and pass 0 as last - argument (reference) to fix_fields() - */ - select_lex->having= join->having= and_items(join->having, item); - if (join->having == item) - item->name= (char*)in_having_cond; - select_lex->having_fix_field= 1; - /* - we do not check join->having->fixed, because Item_and (from and_items) - or comparison function (from func->create) can't be fixed after creation - */ - tmp= join->having->fix_fields(thd, 0); - select_lex->having_fix_field= 0; - if (tmp) - DBUG_RETURN(RES_ERROR); + + if (!join_having) + item->name= (char*) in_having_cond; + if (fix_having(item, select_lex)) + DBUG_RETURN(true); + *having_item= item; } else { @@ -1571,13 +1702,8 @@ Item_in_subselect::single_value_in_to_exists_transformer(JOIN * join, Comp_creat if (select_lex->table_list.elements) { - bool tmp; - Item *having= item, *orig_item= item; - select_lex->item_list.empty(); - select_lex->item_list.push_back(new Item_int("Not_used", - (longlong) 1, - MY_INT64_NUM_DECIMAL_DIGITS)); - select_lex->ref_pointer_array[0]= select_lex->item_list.head(); + Item *having= item; + Item *orig_item= item; item= func->create(expr, item); if (!abort_on_null && orig_item->maybe_null) @@ -1587,25 +1713,13 @@ Item_in_subselect::single_value_in_to_exists_transformer(JOIN * join, Comp_creat { if (!(having= new Item_func_trig_cond(having, get_cond_guard(0)))) - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); } - /* - Item_is_not_null_test can't be changed during fix_fields() - we can assign select_lex->having here, and pass 0 as last - argument (reference) to fix_fields() - */ - having->name= (char*)in_having_cond; - select_lex->having= join->having= having; - select_lex->having_fix_field= 1; - /* - we do not check join->having->fixed, because Item_and (from - and_items) or comparison function (from func->create) can't be - fixed after creation - */ - tmp= join->having->fix_fields(thd, 0); - select_lex->having_fix_field= 0; - if (tmp) - DBUG_RETURN(RES_ERROR); + having->name= (char*) in_having_cond; + if (fix_having(having, select_lex)) + DBUG_RETURN(true); + *having_item= having; + item= new Item_cond_or(item, new Item_func_isnull(orig_item)); } @@ -1616,39 +1730,23 @@ Item_in_subselect::single_value_in_to_exists_transformer(JOIN * join, Comp_creat if (!abort_on_null && left_expr->maybe_null) { if (!(item= new Item_func_trig_cond(item, get_cond_guard(0)))) - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); } + /* TODO: figure out why the following is done here in single_value_transformer but there is no corresponding action in row_value_transformer? */ - item->name= (char *)in_additional_cond; - - /* - AND can't be changed during fix_fields() - we can assign select_lex->having here, and pass 0 as last - argument (reference) to fix_fields() - */ - select_lex->where= join->conds= and_items(join->conds, item); - select_lex->where->top_level_item(); - /* - we do not check join->conds->fixed, because Item_and can't be fixed - after creation - */ - if (join->conds->fix_fields(thd, 0)) - DBUG_RETURN(RES_ERROR); + item->name= (char *) in_additional_cond; + if (!item->fixed && item->fix_fields(thd, 0)) + DBUG_RETURN(true); + *where_item= item; } else { - bool tmp; if (select_lex->master_unit()->is_union()) { - /* - comparison functions can't be changed during fix_fields() - we can assign select_lex->having here, and pass 0 as last - argument (reference) to fix_fields() - */ Item *new_having= func->create(expr, new Item_ref_null_helper(&select_lex->context, this, @@ -1659,49 +1757,40 @@ Item_in_subselect::single_value_in_to_exists_transformer(JOIN * join, Comp_creat { if (!(new_having= new Item_func_trig_cond(new_having, get_cond_guard(0)))) - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); } - new_having->name= (char*)in_having_cond; - select_lex->having= join->having= new_having; - select_lex->having_fix_field= 1; - - /* - we do not check join->having->fixed, because comparison function - (from func->create) can't be fixed after creation - */ - tmp= join->having->fix_fields(thd, 0); - select_lex->having_fix_field= 0; - if (tmp) - DBUG_RETURN(RES_ERROR); + + new_having->name= (char*) in_having_cond; + if (fix_having(new_having, select_lex)) + DBUG_RETURN(true); + *having_item= new_having; } else - { - // it is single select without tables => possible optimization - // remove the dependence mark since the item is moved to upper - // select and is not outer anymore. - item->walk(&Item::remove_dependence_processor, 0, - (uchar *) select_lex->outer_select()); - item= func->create(left_expr, item); - // fix_field of item will be done in time of substituting - substitution= item; - have_to_be_excluded= 1; - if (thd->lex->describe) - { - char warn_buff[MYSQL_ERRMSG_SIZE]; - sprintf(warn_buff, ER(ER_SELECT_REDUCED), select_lex->select_number); - push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, - ER_SELECT_REDUCED, warn_buff); - } - DBUG_RETURN(RES_REDUCE); - } + DBUG_ASSERT(FALSE); } } - DBUG_RETURN(RES_OK); + DBUG_RETURN(false); } -Item_subselect::trans_res +/** + Wrap a multi-column IN/ALL/ANY subselect into an Item_in_optimizer. + + @param join Join object of the subquery (i.e. 'child' join). + + @details + The subquery predicate is wrapped into an Item_in_optimizer. Later the query + optimization phase chooses whether the subquery under the Item_in_optimizer + will be further transformed into an equivalent correlated EXISTS by injecting + additional predicates, or will be executed via subquery materialization in its + unmodified form. + + @retval false The subquery was transformed + @retval true Error +*/ + +bool Item_in_subselect::row_value_transformer(JOIN *join) { SELECT_LEX *select_lex= join->select_lex; @@ -1713,7 +1802,7 @@ Item_in_subselect::row_value_transformer(JOIN *join) if (select_lex->item_list.elements != cols_num) { my_error(ER_OPERAND_COLUMNS, MYF(0), cols_num); - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); } /* @@ -1732,7 +1821,7 @@ Item_in_subselect::row_value_transformer(JOIN *join) if (!optimizer || optimizer->fix_left(thd, 0)) { thd->lex->current_select= current; - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); } // we will refer to upper level cache array => we have to save it in PS @@ -1748,89 +1837,97 @@ Item_in_subselect::row_value_transformer(JOIN *join) */ master_unit->uncacheable|= UNCACHEABLE_EXPLAIN; select_lex->uncacheable|= UNCACHEABLE_EXPLAIN; - - if (!abort_on_null && left_expr->maybe_null && !pushed_cond_guards) - { - if (!(pushed_cond_guards= (bool*)join->thd->alloc(sizeof(bool) * - left_expr->cols()))) - DBUG_RETURN(RES_ERROR); - for (uint i= 0; i < cols_num; i++) - pushed_cond_guards[i]= TRUE; - } } - /* - If this IN predicate can be computed via materialization, do not - perform the IN -> EXISTS transformation. - */ - if (exec_method == MATERIALIZATION) - DBUG_RETURN(RES_OK); - - /* Perform the IN=>EXISTS transformation. */ - DBUG_RETURN(row_value_in_to_exists_transformer(join)); + DBUG_RETURN(false); } /** - Tranform a (possibly non-correlated) IN subquery into a correlated EXISTS. + Create the predicates needed to transform a multi-column IN/ALL/ANY + subselect into a correlated EXISTS via predicate injection. - @todo - The IF-ELSE below can be refactored so that there is no duplication of the - statements that create the new conditions. For this we have to invert the IF - and the FOR statements as this: - for (each left operand) - create the equi-join condition - if (is_having_used || !abort_on_null) - create the "is null" and is_not_null_test items - if (is_having_used) - add the equi-join and the null tests to HAVING - else - add the equi-join and the "is null" to WHERE - add the is_not_null_test to HAVING + @details + The correlated predicates are created as follows: + + - If the subquery has aggregates, GROUP BY, or HAVING, convert to + + (l1, l2, l3) IN (SELECT v1, v2, v3 ... HAVING having) + => + EXISTS (SELECT ... HAVING having and + (l1 = v1 or is null v1) and + (l2 = v2 or is null v2) and + (l3 = v3 or is null v3) and + is_not_null_test(v1) and + is_not_null_test(v2) and + is_not_null_test(v3)) + + where is_not_null_test used to register nulls in case if we have + not found matching to return correct NULL value. + + - Otherwise (no aggregates/GROUP BY/HAVING) convert the subquery as follows: + + (l1, l2, l3) IN (SELECT v1, v2, v3 ... WHERE where) + => + EXISTS (SELECT ... WHERE where and + (l1 = v1 or is null v1) and + (l2 = v2 or is null v2) and + (l3 = v3 or is null v3) + HAVING is_not_null_test(v1) and + is_not_null_test(v2) and + is_not_null_test(v3)) + where is_not_null_test registers NULLs values but reject rows. + + in case when we do not need correct NULL, we have simplier construction: + EXISTS (SELECT ... WHERE where and + (l1 = v1) and + (l2 = v2) and + (l3 = v3) + + @param join[in] Join object of the subquery (i.e. 'child' join). + @param where_item[out] the in-to-exists addition to the where clause + @param having_item[out] the in-to-exists addition to the having clause + + @retval false If the new conditions were created successfully + @retval true Error */ -Item_subselect::trans_res -Item_in_subselect::row_value_in_to_exists_transformer(JOIN * join) +bool +Item_in_subselect::create_row_in_to_exists_cond(JOIN * join, + Item **where_item, + Item **having_item) { SELECT_LEX *select_lex= join->select_lex; - Item *having_item= 0; uint cols_num= left_expr->cols(); - bool is_having_used= (join->having || select_lex->with_sum_func || + /* + The non-transformed HAVING clause of 'join' may be stored in two ways + during JOIN::optimize: this->tmp_having= this->having; this->having= 0; + */ + Item* join_having= join->having ? join->having : join->tmp_having; + bool is_having_used= (join_having || select_lex->with_sum_func || select_lex->group_list.first || !select_lex->table_list.elements); - DBUG_ENTER("Item_in_subselect::row_value_in_to_exists_transformer"); + DBUG_ENTER("Item_in_subselect::create_row_in_to_exists_cond"); + + *where_item= NULL; + *having_item= NULL; - /* - The IN=>EXISTS transformation makes non-correlated subqueries correlated. - */ - select_lex->uncacheable|= UNCACHEABLE_DEPENDENT; if (is_having_used) { - /* - (l1, l2, l3) IN (SELECT v1, v2, v3 ... HAVING having) => - EXISTS (SELECT ... HAVING having and - (l1 = v1 or is null v1) and - (l2 = v2 or is null v2) and - (l3 = v3 or is null v3) and - is_not_null_test(v1) and - is_not_null_test(v2) and - is_not_null_test(v3)) - where is_not_null_test used to register nulls in case if we have - not found matching to return correct NULL value - TODO: say here explicitly if the order of AND parts matters or not. - */ + /* TODO: say here explicitly if the order of AND parts matters or not. */ Item *item_having_part2= 0; for (uint i= 0; i < cols_num; i++) { DBUG_ASSERT((left_expr->fixed && + select_lex->ref_pointer_array[i]->fixed) || (select_lex->ref_pointer_array[i]->type() == REF_ITEM && ((Item_ref*)(select_lex->ref_pointer_array[i]))->ref_type() == Item_ref::OUTER_REF)); if (select_lex->ref_pointer_array[i]-> check_cols(left_expr->element_index(i)->cols())) - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); Item *item_eq= new Item_func_eq(new Item_ref(&select_lex->context, @@ -1842,23 +1939,21 @@ Item_in_subselect::row_value_in_to_exists_transformer(JOIN * join) Item_ref(&select_lex->context, select_lex->ref_pointer_array + i, (char *)"<no matter>", - (char *)"<list ref>") - ); + (char *)"<list ref>")); Item *item_isnull= new Item_func_isnull(new Item_ref(&select_lex->context, select_lex->ref_pointer_array+i, (char *)"<no matter>", - (char *)"<list ref>") - ); + (char *)"<list ref>")); Item *col_item= new Item_cond_or(item_eq, item_isnull); if (!abort_on_null && left_expr->element_index(i)->maybe_null) { if (!(col_item= new Item_func_trig_cond(col_item, get_cond_guard(i)))) - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); } - having_item= and_items(having_item, col_item); - + *having_item= and_items(*having_item, col_item); + Item *item_nnull_test= new Item_is_not_null_test(this, new Item_ref(&select_lex->context, @@ -1870,34 +1965,15 @@ Item_in_subselect::row_value_in_to_exists_transformer(JOIN * join) { if (!(item_nnull_test= new Item_func_trig_cond(item_nnull_test, get_cond_guard(i)))) - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); } item_having_part2= and_items(item_having_part2, item_nnull_test); item_having_part2->top_level_item(); } - having_item= and_items(having_item, item_having_part2); - having_item->top_level_item(); + *having_item= and_items(*having_item, item_having_part2); } else { - /* - (l1, l2, l3) IN (SELECT v1, v2, v3 ... WHERE where) => - EXISTS (SELECT ... WHERE where and - (l1 = v1 or is null v1) and - (l2 = v2 or is null v2) and - (l3 = v3 or is null v3) - HAVING is_not_null_test(v1) and - is_not_null_test(v2) and - is_not_null_test(v3)) - where is_not_null_test register NULLs values but reject rows - - in case when we do not need correct NULL, we have simplier construction: - EXISTS (SELECT ... WHERE where and - (l1 = v1) and - (l2 = v2) and - (l3 = v3) - */ - Item *where_item= 0; for (uint i= 0; i < cols_num; i++) { Item *item, *item_isnull; @@ -1908,7 +1984,7 @@ Item_in_subselect::row_value_in_to_exists_transformer(JOIN * join) Item_ref::OUTER_REF)); if (select_lex->ref_pointer_array[i]-> check_cols(left_expr->element_index(i)->cols())) - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); item= new Item_func_eq(new Item_direct_ref(&select_lex->context, @@ -1921,8 +1997,7 @@ Item_in_subselect::row_value_in_to_exists_transformer(JOIN * join) select_lex-> ref_pointer_array+i, (char *)"<no matter>", - (char *)"<list ref>") - ); + (char *)"<list ref>")); if (!abort_on_null) { Item *having_col_item= @@ -1940,8 +2015,7 @@ Item_in_subselect::row_value_in_to_exists_transformer(JOIN * join) select_lex-> ref_pointer_array+i, (char *)"<no matter>", - (char *)"<list ref>") - ); + (char *)"<list ref>")); item= new Item_cond_or(item, item_isnull); /* TODO: why we create the above for cases where the right part @@ -1950,104 +2024,211 @@ Item_in_subselect::row_value_in_to_exists_transformer(JOIN * join) if (left_expr->element_index(i)->maybe_null) { if (!(item= new Item_func_trig_cond(item, get_cond_guard(i)))) - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); if (!(having_col_item= new Item_func_trig_cond(having_col_item, get_cond_guard(i)))) - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); } - having_item= and_items(having_item, having_col_item); + *having_item= and_items(*having_item, having_col_item); } - where_item= and_items(where_item, item); + *where_item= and_items(*where_item, item); } - /* - AND can't be changed during fix_fields() - we can assign select_lex->where here, and pass 0 as last - argument (reference) to fix_fields() - */ - select_lex->where= join->conds= and_items(join->conds, where_item); - select_lex->where->top_level_item(); - if (join->conds->fix_fields(thd, 0)) - DBUG_RETURN(RES_ERROR); } - if (having_item) + + if (*where_item) { - bool res; - select_lex->having= join->having= and_items(join->having, having_item); - if (having_item == select_lex->having) - having_item->name= (char*)in_having_cond; - select_lex->having->top_level_item(); - /* - AND can't be changed during fix_fields() - we can assign select_lex->having here, and pass 0 as last - argument (reference) to fix_fields() - */ - select_lex->having_fix_field= 1; - res= join->having->fix_fields(thd, 0); - select_lex->having_fix_field= 0; - if (res) - { - DBUG_RETURN(RES_ERROR); - } + if (!(*where_item)->fixed && (*where_item)->fix_fields(thd, 0)) + DBUG_RETURN(true); + (*where_item)->top_level_item(); + } + + if (*having_item) + { + if (!join_having) + (*having_item)->name= (char*) in_having_cond; + if (fix_having(*having_item, select_lex)) + DBUG_RETURN(true); + (*having_item)->top_level_item(); } - DBUG_RETURN(RES_OK); + DBUG_RETURN(false); } -Item_subselect::trans_res +bool Item_in_subselect::select_transformer(JOIN *join) { - return select_in_like_transformer(join, &eq_creator); + return select_in_like_transformer(join); } /** - Prepare IN/ALL/ANY/SOME subquery transformation and call appropriate - transformation function. + Create the predicates needed to transform an IN/ALL/ANY subselect into a + correlated EXISTS via predicate injection. + + @param join_arg Join object of the subquery. + + @retval FALSE ok + @retval TRUE error +*/ + +bool Item_in_subselect::create_in_to_exists_cond(JOIN *join_arg) +{ + bool res; + + DBUG_ASSERT(engine->engine_type() == subselect_engine::SINGLE_SELECT_ENGINE || + engine->engine_type() == subselect_engine::UNION_ENGINE); + /* + TODO: the call to init_cond_guards allocates and initializes an + array of booleans that may not be used later because we may choose + materialization. + The two calls below to create_XYZ_cond depend on this boolean array. + If the dependency is removed, the call can be moved to a later phase. + */ + init_cond_guards(); + if (left_expr->cols() == 1) + res= create_single_in_to_exists_cond(join_arg, + &(join_arg->in_to_exists_where), + &(join_arg->in_to_exists_having)); + else + res= create_row_in_to_exists_cond(join_arg, + &(join_arg->in_to_exists_where), + &(join_arg->in_to_exists_having)); + + /* + The IN=>EXISTS transformation makes non-correlated subqueries correlated. + */ + join_arg->select_lex->uncacheable|= UNCACHEABLE_DEPENDENT_INJECTED; + /* + The uncacheable property controls a number of actions, e.g. whether to + save/restore (via init_save_join_tab/restore_tmp) the original JOIN for + plans with a temp table where the original JOIN was overriden by + make_simple_join. The UNCACHEABLE_EXPLAIN is ignored by EXPLAIN, thus + non-correlated subqueries will not appear as such to EXPLAIN. + */ + join_arg->select_lex->master_unit()->uncacheable|= UNCACHEABLE_EXPLAIN; + join_arg->select_lex->uncacheable|= UNCACHEABLE_EXPLAIN; + return (res); +} + + +/** + Transform an IN/ALL/ANY subselect into a correlated EXISTS via injecting + correlated in-to-exists predicates. + + @param join_arg Join object of the subquery. + + @retval FALSE ok + @retval TRUE error +*/ + +bool Item_in_subselect::inject_in_to_exists_cond(JOIN *join_arg) +{ + SELECT_LEX *select_lex= join_arg->select_lex; + Item *where_item= join_arg->in_to_exists_where; + Item *having_item= join_arg->in_to_exists_having; + + DBUG_ENTER("Item_in_subselect::inject_in_to_exists_cond"); + + if (where_item) + { + List<Item> *and_args= NULL; + /* + If the top-level Item of the WHERE clause is an AND, detach the multiple + equality list that was attached to the end of the AND argument list by + build_equal_items_for_cond(). The multiple equalities must be detached + because fix_fields merges lower level AND arguments into the upper AND. + As a result, the arguments from lower-level ANDs are concatenated after + the multiple equalities. When the multiple equality list is treated as + such, it turns out that it contains non-Item_equal object which is wrong. + */ + if (join_arg->conds && join_arg->conds->type() == Item::COND_ITEM && + ((Item_cond*) join_arg->conds)->functype() == Item_func::COND_AND_FUNC) + { + and_args= ((Item_cond*) join_arg->conds)->argument_list(); + if (join_arg->cond_equal) + and_args->disjoin((List<Item> *) &join_arg->cond_equal->current_level); + } + + where_item= and_items(join_arg->conds, where_item); + if (!where_item->fixed && where_item->fix_fields(thd, 0)) + DBUG_RETURN(true); + // TIMOUR TODO: call optimize_cond() for the new where clause + thd->change_item_tree(&select_lex->where, where_item); + select_lex->where->top_level_item(); + join_arg->conds= select_lex->where; + + /* Attach back the list of multiple equalities to the new top-level AND. */ + if (and_args && join_arg->cond_equal) + { + /* The argument list of the top-level AND may change after fix fields. */ + and_args= ((Item_cond*) join_arg->conds)->argument_list(); + and_args->concat((List<Item> *) &join_arg->cond_equal->current_level); + } + } + + if (having_item) + { + Item* join_having= join_arg->having ? join_arg->having:join_arg->tmp_having; + having_item= and_items(join_having, having_item); + if (fix_having(having_item, select_lex)) + DBUG_RETURN(true); + // TIMOUR TODO: call optimize_cond() for the new having clause + thd->change_item_tree(&select_lex->having, having_item); + select_lex->having->top_level_item(); + join_arg->having= select_lex->having; + } + join_arg->thd->change_item_tree(&unit->global_parameters->select_limit, + new Item_int((int32) 1)); + unit->select_limit_cnt= 1; + + DBUG_RETURN(false); +} + - To decide which transformation procedure (scalar or row) applicable here - we have to call fix_fields() for left expression to be able to call - cols() method on it. Also this method make arena management for - underlying transformation methods. +/** + Prepare IN/ALL/ANY/SOME subquery transformation and call the appropriate + transformation function. @param join JOIN object of transforming subquery - @param func creator of condition function of subquery - @retval - RES_OK OK - @retval - RES_REDUCE OK, and current subquery was reduced during - transformation - @retval - RES_ERROR Error + @notes + To decide which transformation procedure (scalar or row) applicable here + we have to call fix_fields() for the left expression to be able to call + cols() method on it. Also this method makes arena management for + underlying transformation methods. + + @retval false OK + @retval true Error */ -Item_subselect::trans_res -Item_in_subselect::select_in_like_transformer(JOIN *join, Comp_creator *func) +bool +Item_in_subselect::select_in_like_transformer(JOIN *join) { Query_arena *arena, backup; SELECT_LEX *current= thd->lex->current_select; const char *save_where= thd->where; - Item_subselect::trans_res res= RES_ERROR; + bool trans_res= true; bool result; DBUG_ENTER("Item_in_subselect::select_in_like_transformer"); + /* + IN/SOME/ALL/ANY subqueries aren't support LIMIT clause. Without it + ORDER BY clause becomes meaningless thus we drop it here. + */ + for (SELECT_LEX *sl= current->master_unit()->first_select(); + sl; sl= sl->next_select()) { - /* - IN/SOME/ALL/ANY subqueries aren't support LIMIT clause. Without it - ORDER BY clause becomes meaningless thus we drop it here. - */ - SELECT_LEX *sl= current->master_unit()->first_select(); - for (; sl; sl= sl->next_select()) + if (sl->join) { - if (sl->join) - sl->join->order= 0; + sl->join->order= 0; + sl->join->skip_sort_order= 1; } } if (changed) - DBUG_RETURN(RES_OK); + DBUG_RETURN(false); thd->where= "IN/ALL/ANY subquery"; @@ -2079,22 +2260,15 @@ Item_in_subselect::select_in_like_transformer(JOIN *join, Comp_creator *func) goto err; /* - If we didn't choose an execution method up to this point, we choose - the IN=>EXISTS transformation. - */ - if (exec_method == NOT_TRANSFORMED) - exec_method= IN_TO_EXISTS; - arena= thd->activate_stmt_arena_if_needed(&backup); - - /* Both transformers call fix_fields() only for Items created inside them, and all that items do not make permanent changes in current item arena which allow to us call them with changed arena (if we do not know nature of Item, we have to call fix_fields() for it only with original arena to avoid memory leack) */ + arena= thd->activate_stmt_arena_if_needed(&backup); if (left_expr->cols() == 1) - res= single_value_transformer(join, func); + trans_res= single_value_transformer(join); else { /* we do not support row operation for ALL/ANY/SOME */ @@ -2103,21 +2277,21 @@ Item_in_subselect::select_in_like_transformer(JOIN *join, Comp_creator *func) if (arena) thd->restore_active_arena(arena, &backup); my_error(ER_OPERAND_COLUMNS, MYF(0), 1); - DBUG_RETURN(RES_ERROR); + DBUG_RETURN(true); } - res= row_value_transformer(join); + trans_res= row_value_transformer(join); } if (arena) thd->restore_active_arena(arena, &backup); err: thd->where= save_where; - DBUG_RETURN(res); + DBUG_RETURN(trans_res); } void Item_in_subselect::print(String *str, enum_query_type query_type) { - if (exec_method == IN_TO_EXISTS) + if (in_strategy & SUBS_IN_TO_EXISTS) str->append(STRING_WITH_LEN("<exists>")); else { @@ -2133,7 +2307,7 @@ bool Item_in_subselect::fix_fields(THD *thd_arg, Item **ref) uint outer_cols_num; List<Item> *inner_cols; - if (exec_method == SEMI_JOIN) + if (in_strategy & SUBS_SEMI_JOIN) return !( (*ref)= new Item_int(1)); /* @@ -2206,99 +2380,47 @@ void Item_in_subselect::update_used_tables() used_tables_cache |= left_expr->used_tables(); } + /** - Try to create an engine to compute the subselect via materialization, - and if this fails, revert to execution via the IN=>EXISTS transformation. + Try to create and initialize an engine to compute a subselect via + materialization. @details - The purpose of this method is to hide the implementation details - of this Item's execution. The method creates a new engine for - materialized execution, and initializes the engine. - - If this initialization fails - - either because it wasn't possible to create the needed temporary table - and its index, - - or because of a memory allocation error, - then we revert back to execution via the IN=>EXISTS tranformation. - - The initialization of the new engine is divided in two parts - a permanent - one that lives across prepared statements, and one that is repeated for each - execution. + The method creates a new engine for materialized execution, and initializes + the engine. The initialization may fail + - either because it wasn't possible to create the needed temporary table + and its index, + - or because of a memory allocation error, @returns @retval TRUE memory allocation error occurred @retval FALSE an execution method was chosen successfully */ -bool Item_in_subselect::setup_engine() +bool Item_in_subselect::setup_mat_engine() { - subselect_hash_sj_engine *new_engine= NULL; - bool res= FALSE; - - DBUG_ENTER("Item_in_subselect::setup_engine"); - - if (engine->engine_type() == subselect_engine::SINGLE_SELECT_ENGINE) - { - /* Create/initialize objects in permanent memory. */ - subselect_single_select_engine *old_engine; - Query_arena *arena= thd->stmt_arena, backup; - - old_engine= (subselect_single_select_engine*) engine; + subselect_hash_sj_engine *mat_engine= NULL; + subselect_single_select_engine *select_engine; - if (arena->is_conventional()) - arena= 0; - else - thd->set_n_backup_active_arena(arena, &backup); + DBUG_ENTER("Item_in_subselect::setup_mat_engine"); - if (!(new_engine= new subselect_hash_sj_engine(thd, this, - old_engine)) || - new_engine->init_permanent(unit->get_unit_column_types())) - { - Item_subselect::trans_res trans_res; - /* - If for some reason we cannot use materialization for this IN predicate, - delete all materialization-related objects, and apply the IN=>EXISTS - transformation. - */ - delete new_engine; - new_engine= NULL; - exec_method= NOT_TRANSFORMED; - if (left_expr->cols() == 1) - trans_res= single_value_in_to_exists_transformer(old_engine->join, - &eq_creator); - else - trans_res= row_value_in_to_exists_transformer(old_engine->join); - res= (trans_res != Item_subselect::RES_OK); - } - if (new_engine) - engine= new_engine; + /* + The select_engine (that executes transformed IN=>EXISTS subselects) is + pre-created at parse time, and is stored in statment memory (preserved + across PS executions). + */ + DBUG_ASSERT(engine->engine_type() == subselect_engine::SINGLE_SELECT_ENGINE); + select_engine= (subselect_single_select_engine*) engine; - if (arena) - thd->restore_active_arena(arena, &backup); - } - else - { - DBUG_ASSERT(engine->engine_type() == subselect_engine::HASH_SJ_ENGINE); - new_engine= (subselect_hash_sj_engine*) engine; - } + /* Create/initialize execution objects. */ + if (!(mat_engine= new subselect_hash_sj_engine(thd, this, select_engine))) + DBUG_RETURN(TRUE); - /* Initilizations done in runtime memory, repeated for each execution. */ - if (new_engine) - { - /* - Reset the LIMIT 1 set in Item_exists_subselect::fix_length_and_dec. - TODO: - Currently we set the subquery LIMIT to infinity, and this is correct - because we forbid at parse time LIMIT inside IN subqueries (see - Item_in_subselect::test_limit). However, once we allow this, here - we should set the correct limit if given in the query. - */ - unit->global_parameters->select_limit= NULL; - if ((res= new_engine->init_runtime())) - DBUG_RETURN(res); - } + if (mat_engine->init(&select_engine->join->fields_list)) + DBUG_RETURN(TRUE); - DBUG_RETURN(res); + engine= mat_engine; + DBUG_RETURN(FALSE); } @@ -2341,39 +2463,35 @@ bool Item_in_subselect::init_left_expr_cache() } -/* - Callback to test if an IN predicate is expensive. - - @details - IN predicates are considered expensive only if they will be executed via - materialization. The return value affects the behavior of - make_cond_for_table() in such a way that it is unchanged when we use - the IN=>EXISTS transformation to compute IN. - - @retval TRUE if the predicate is expensive - @retval FALSE otherwise -*/ - -bool Item_in_subselect::is_expensive_processor(uchar *arg) +bool Item_in_subselect::init_cond_guards() { - return exec_method == MATERIALIZATION; + uint cols_num= left_expr->cols(); + if (!abort_on_null && left_expr->maybe_null && !pushed_cond_guards) + { + if (!(pushed_cond_guards= (bool*)thd->alloc(sizeof(bool) * cols_num))) + return TRUE; + for (uint i= 0; i < cols_num; i++) + pushed_cond_guards[i]= TRUE; + } + return FALSE; } -Item_subselect::trans_res +bool Item_allany_subselect::select_transformer(JOIN *join) { DBUG_ENTER("Item_allany_subselect::select_transformer"); - exec_method= IN_TO_EXISTS; + DBUG_ASSERT((in_strategy & ~(SUBS_MAXMIN | SUBS_IN_TO_EXISTS)) == 0); + in_strategy|= SUBS_IN_TO_EXISTS; if (upper_item) upper_item->show= 1; - DBUG_RETURN(select_in_like_transformer(join, func)); + DBUG_RETURN(select_in_like_transformer(join)); } void Item_allany_subselect::print(String *str, enum_query_type query_type) { - if (exec_method == IN_TO_EXISTS) + if (in_strategy & SUBS_IN_TO_EXISTS) str->append(STRING_WITH_LEN("<exists>")); else { @@ -2415,6 +2533,7 @@ void subselect_single_select_engine::cleanup() prepared= executed= 0; join= 0; result->cleanup(); + select_lex->uncacheable&= ~UNCACHEABLE_DEPENDENT_INJECTED; DBUG_VOID_RETURN; } @@ -2424,6 +2543,9 @@ void subselect_union_engine::cleanup() DBUG_ENTER("subselect_union_engine::cleanup"); unit->reinit_exec_mechanism(); result->cleanup(); + unit->uncacheable&= ~UNCACHEABLE_DEPENDENT_INJECTED; + for (SELECT_LEX *sl= unit->first_select(); sl; sl= sl->next_select()) + sl->uncacheable&= ~UNCACHEABLE_DEPENDENT_INJECTED; DBUG_VOID_RETURN; } @@ -3416,6 +3538,7 @@ void subselect_indexsubquery_engine::print(String *str, @param si new subselect Item @param res new select_result object + @param temp temporary assignment @retval FALSE OK @@ -3423,11 +3546,23 @@ void subselect_indexsubquery_engine::print(String *str, TRUE error */ -bool subselect_single_select_engine::change_result(Item_subselect *si, - select_result_interceptor *res) +bool +subselect_single_select_engine::change_result(Item_subselect *si, + select_result_interceptor *res, + bool temp) { item= si; - result= res; + if (temp) + { + /* + Here we reuse change_item_tree to roll back assignment. It has + nothing special about Item* pointer so it is safe conversion. We do + not change the interface to be compatible with MySQL. + */ + thd->change_item_tree((Item**) &result, (Item*)res); + } + else + result= res; return select_lex->join->change_result(result); } @@ -3445,11 +3580,15 @@ bool subselect_single_select_engine::change_result(Item_subselect *si, */ bool subselect_union_engine::change_result(Item_subselect *si, - select_result_interceptor *res) + select_result_interceptor *res, + bool temp) { item= si; int rc= unit->change_result(res, result); - result= res; + if (temp) + thd->change_item_tree((Item**) &result, (Item*)res); + else + result= res; return rc; } @@ -3466,8 +3605,11 @@ bool subselect_union_engine::change_result(Item_subselect *si, TRUE error */ -bool subselect_uniquesubquery_engine::change_result(Item_subselect *si, - select_result_interceptor *res) +bool +subselect_uniquesubquery_engine::change_result(Item_subselect *si, + select_result_interceptor *res, + bool temp + __attribute__((unused))) { DBUG_ASSERT(0); return TRUE; @@ -3809,13 +3951,14 @@ 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(List<Item> *tmp_columns) { + select_union *result_sink; /* Options to create_tmp_table. */ ulonglong tmp_create_options= thd->options | TMP_TABLE_ALL_COLUMNS; /* | TMP_TABLE_FORCE_MYISAM; TIMOUR: force MYISAM */ - DBUG_ENTER("subselect_hash_sj_engine::init_permanent"); + DBUG_ENTER("subselect_hash_sj_engine::init"); if (bitmap_init_memroot(&non_null_key_parts, tmp_columns->elements, thd->mem_root) || @@ -3844,15 +3987,16 @@ bool subselect_hash_sj_engine::init_permanent(List<Item> *tmp_columns) DBUG_RETURN(TRUE); } */ - if (!(result= new select_materialize_with_stats)) + if (!(result_sink= 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)) + result_sink->get_tmp_table_param()->materialized_subquery= true; + if (result_sink->create_result_table(thd, tmp_columns, TRUE, + tmp_create_options, + "materialized subselect", TRUE)) DBUG_RETURN(TRUE); - tmp_table= ((select_union*) result)->table; + tmp_table= result_sink->table; + result= result_sink; /* If the subquery has blobs, or the total key lenght is bigger than @@ -3889,6 +4033,17 @@ bool subselect_hash_sj_engine::init_permanent(List<Item> *tmp_columns) !(lookup_engine= make_unique_engine())) DBUG_RETURN(TRUE); + /* + Repeat name resolution for 'cond' since cond is not part of any + clause of the query, and it is not 'fixed' during JOIN::prepare. + */ + if (semi_join_conds && !semi_join_conds->fixed && + semi_join_conds->fix_fields(thd, (Item**)&semi_join_conds)) + DBUG_RETURN(TRUE); + /* Let our engine reuse this query plan for materialization. */ + materialize_join= materialize_engine->join; + materialize_join->change_result(result); + DBUG_RETURN(FALSE); } @@ -4001,41 +4156,22 @@ subselect_hash_sj_engine::make_unique_engine() } -/** - Initialize members of the engine that need to be re-initilized at each - execution. +subselect_hash_sj_engine::~subselect_hash_sj_engine() +{ + delete lookup_engine; + delete result; + if (tmp_table) + free_tmp_table(thd, tmp_table); +} - @retval TRUE if a memory allocation error occurred - @retval FALSE if success -*/ -bool subselect_hash_sj_engine::init_runtime() +int subselect_hash_sj_engine::prepare() { /* Create and optimize the JOIN that will be used to materialize the subquery if not yet created. */ - materialize_engine->prepare(); - /* - Repeat name resolution for 'cond' since cond is not part of any - clause of the query, and it is not 'fixed' during JOIN::prepare. - */ - if (semi_join_conds && !semi_join_conds->fixed && - semi_join_conds->fix_fields(thd, (Item**)&semi_join_conds)) - return TRUE; - /* Let our engine reuse this query plan for materialization. */ - materialize_join= materialize_engine->join; - materialize_join->change_result(result); - return FALSE; -} - - -subselect_hash_sj_engine::~subselect_hash_sj_engine() -{ - delete lookup_engine; - delete result; - if (tmp_table) - free_tmp_table(thd, tmp_table); + return materialize_engine->prepare(); } @@ -4056,6 +4192,12 @@ void subselect_hash_sj_engine::cleanup() count_null_only_columns= 0; strategy= UNDEFINED; materialize_engine->cleanup(); + /* + Restore the original Item_in_subselect engine. This engine is created once + at parse time and stored across executions, while all other materialization + related engines are created and chosen for each execution. + */ + ((Item_in_subselect *) item)->engine= materialize_engine; if (lookup_engine_type == TABLE_SCAN_ENGINE || lookup_engine_type == ROWID_MERGE_ENGINE) { @@ -4072,6 +4214,9 @@ void subselect_hash_sj_engine::cleanup() DBUG_ASSERT(lookup_engine->engine_type() == UNIQUESUBQUERY_ENGINE); lookup_engine->cleanup(); result->cleanup(); /* Resets the temp table as well. */ + DBUG_ASSERT(tmp_table); + free_tmp_table(thd, tmp_table); + tmp_table= NULL; } @@ -4100,9 +4245,8 @@ int subselect_hash_sj_engine::exec() the subquery predicate. */ thd->lex->current_select= materialize_engine->select_lex; - if ((res= materialize_join->optimize())) - goto err; /* purecov: inspected */ - DBUG_ASSERT(!is_materialized); /* We should materialize only once. */ + /* The subquery should be optimized, and materialized only once. */ + DBUG_ASSERT(materialize_join->optimized && !is_materialized); materialize_join->exec(); if ((res= test(materialize_join->error || thd->is_fatal_error))) goto err; @@ -4126,11 +4270,10 @@ int subselect_hash_sj_engine::exec() tmp_table->file->info(HA_STATUS_VARIABLE); if (!tmp_table->file->stats.records) { - item_in->value= FALSE; /* The value of IN will not change during this execution. */ - item_in->is_constant= TRUE; + item_in->reset(); + item_in->make_const(); item_in->set_first_execution(); - /* TIMOUR: check if we need this: item_in->null_value= FALSE; */ DBUG_RETURN(FALSE); } @@ -4257,7 +4400,8 @@ bool subselect_hash_sj_engine::no_tables() } bool subselect_hash_sj_engine::change_result(Item_subselect *si, - select_result_interceptor *res) + select_result_interceptor *res, + bool temp __attribute__((unused))) { DBUG_ASSERT(FALSE); return TRUE; diff --git a/sql/item_subselect.h b/sql/item_subselect.h index 3b43d75f43f..2c357b0da20 100644 --- a/sql/item_subselect.h +++ b/sql/item_subselect.h @@ -32,7 +32,8 @@ class Cached_item; class Item_subselect :public Item_result_field { - bool value_assigned; /* value already assigned to subselect */ + bool value_assigned; /* value already assigned to subselect */ + bool own_engine; /* the engine was not taken from other Item_subselect */ protected: /* thread handler, will be assigned in fix_fields only */ THD *thd; @@ -71,6 +72,13 @@ protected: bool inside_first_fix_fields; bool done_first_fix_fields; + /* + Set to TRUE if at optimization or execution time we determine that this + item's value is a constant. We need this member because it is not possible + to substitute 'this' with a constant item. + */ + bool forced_const; + public: /* A reference from inside subquery predicate to somewhere outside of it */ class Ref_to_outside : public Sql_alloc @@ -112,13 +120,18 @@ public: /* TRUE <=> The underlying SELECT is correlated w.r.t some ancestor select */ bool is_correlated; - enum trans_res {RES_OK, RES_REDUCE, RES_ERROR}; enum subs_type {UNKNOWN_SUBS, SINGLEROW_SUBS, EXISTS_SUBS, IN_SUBS, ALL_SUBS, ANY_SUBS}; Item_subselect(); virtual subs_type substype() { return UNKNOWN_SUBS; } + bool is_in_predicate() + { + return (substype() == Item_subselect::IN_SUBS || + substype() == Item_subselect::ALL_SUBS || + substype() == Item_subselect::ANY_SUBS); + } /* We need this method, because some compilers do not allow 'this' @@ -135,7 +148,7 @@ public: eliminated= FALSE; null_value= 1; } - virtual trans_res select_transformer(JOIN *join); + virtual bool select_transformer(JOIN *join); bool assigned() { return value_assigned; } void assigned(bool a) { value_assigned= a; } enum Type type() const; @@ -149,12 +162,21 @@ public: void fix_after_pullout(st_select_lex *new_parent, Item **ref); void recalc_used_tables(st_select_lex *new_parent, bool after_pullout); virtual bool exec(); + /* + If subquery optimization or execution determines that the subquery has + an empty result, mark the subquery predicate as a constant value. + */ + void make_const() + { + used_tables_cache= 0; + const_item_cache= 0; + forced_const= TRUE; + } virtual void fix_length_and_dec(); table_map used_tables() const; table_map not_null_tables() const { return 0; } bool const_item() const; inline table_map get_used_tables_cache() { return used_tables_cache; } - inline bool get_const_item_cache() { return const_item_cache; } Item *get_tmp_table_item(THD *thd); void update_used_tables(); virtual void print(String *str, enum_query_type query_type); @@ -172,6 +194,7 @@ public: */ bool is_evaluated() const; bool is_uncacheable() const; + bool is_expensive() { return TRUE; } /* Used by max/min subquery to initialize value presence registration @@ -181,12 +204,23 @@ public: enum_parsing_place place() { return parsing_place; } bool walk(Item_processor processor, bool walk_subquery, uchar *arg); bool mark_as_eliminated_processor(uchar *arg); + bool eliminate_subselect_processor(uchar *arg); + bool set_fake_select_as_master_processor(uchar *arg); bool enumerate_field_refs_processor(uchar *arg); bool check_vcol_func_processor(uchar *int_arg) { return trace_unsupported_by_check_vcol_func_processor("subselect"); } + /** + Callback to test if an IN predicate is expensive. + + @notes + The return value affects the behavior of make_cond_for_table(). + @retval TRUE if the predicate is expensive + @retval FALSE otherwise + */ + bool is_expensive_processor(uchar *arg) { return TRUE; } /** Get the SELECT_LEX structure associated with this Item. @return the SELECT_LEX structure associated with this Item @@ -223,7 +257,7 @@ public: subs_type substype() { return SINGLEROW_SUBS; } void reset(); - trans_res select_transformer(JOIN *join); + bool select_transformer(JOIN *join); void store(uint i, Item* item); double val_real(); longlong val_int (); @@ -284,6 +318,8 @@ class Item_exists_subselect :public Item_subselect protected: bool value; /* value of this item (boolean: exists/not-exists) */ + void init_length_and_dec(); + public: Item_exists_subselect(st_select_lex *select_lex); Item_exists_subselect(): Item_subselect() {} @@ -312,6 +348,21 @@ public: }; +/* + Possible methods to execute an IN predicate. These are set by the optimizer + based on user-set optimizer switches, semantic analysis and cost comparison. +*/ +#define SUBS_NOT_TRANSFORMED 0 /* No execution method was chosen for this IN. */ +#define SUBS_SEMI_JOIN 1 /* IN was converted to semi-join. */ +#define SUBS_IN_TO_EXISTS 2 /* IN was converted to correlated EXISTS. */ +#define SUBS_MATERIALIZATION 4 /* Execute IN via subquery materialization. */ +/* Partial matching substrategies of MATERIALIZATION. */ +#define SUBS_PARTIAL_MATCH_ROWID_MERGE 8 +#define SUBS_PARTIAL_MATCH_TABLE_SCAN 16 +/* ALL/ANY will be transformed with max/min optimization */ +#define SUBS_MAXMIN 32 + + /** Representation of IN subquery predicates of the form "left_expr IN (SELECT ...)". @@ -329,8 +380,6 @@ public: class Item_in_subselect :public Item_exists_subselect { -public: - Item *left_expr; protected: /* Cache of the left operand of the subquery predicate. Allocated in the @@ -338,12 +387,6 @@ protected: */ List<Cached_item> *left_expr_cache; bool first_execution; - /* - Set to TRUE if at query execution time we determine that this item's - value is a constant during this execution. We need this member because - it is not possible to substitute 'this' with a constant item. - */ - bool is_constant; /* expr & optimizer used in subselect rewriting to store Item for @@ -353,10 +396,24 @@ protected: Item_in_optimizer *optimizer; bool was_null; bool abort_on_null; -public: /* Used to trigger on/off conditions that were pushed down to subselect */ bool *pushed_cond_guards; - + Comp_creator *func; + +protected: + bool init_cond_guards(); + bool select_in_like_transformer(JOIN *join); + bool single_value_transformer(JOIN *join); + bool row_value_transformer(JOIN * join); + bool fix_having(Item *having, st_select_lex *select_lex); + bool create_single_in_to_exists_cond(JOIN * join, + Item **where_item, + Item **having_item); + bool create_row_in_to_exists_cond(JOIN * join, + Item **where_item, + Item **having_item); +public: + Item *left_expr; /* Priority of this predicate in the convert-to-semi-join-nest process. */ int sj_convert_priority; /* @@ -387,14 +444,8 @@ public: */ bool sjm_scan_allowed; - /* The method chosen to execute the IN predicate. */ - enum enum_exec_method { - NOT_TRANSFORMED, /* No execution method was chosen for this IN. */ - SEMI_JOIN, /* IN was converted to semi-join nest and should be removed. */ - IN_TO_EXISTS, /* IN was converted to correlated EXISTS. */ - MATERIALIZATION /* IN will be executed via subquery materialization. */ - }; - enum_exec_method exec_method; + /* A bitmap of possible execution strategies for an IN predicate. */ + uchar in_strategy; bool *get_cond_guard(int i) { @@ -412,9 +463,10 @@ public: Item_in_subselect(Item * left_expr, st_select_lex *select_lex); Item_in_subselect() :Item_exists_subselect(), left_expr_cache(0), first_execution(TRUE), - is_constant(FALSE), optimizer(0), abort_on_null(0), - pushed_cond_guards(NULL), exec_method(NOT_TRANSFORMED), upper_item(0) - {} + optimizer(0), abort_on_null(0), + pushed_cond_guards(NULL), func(NULL), in_strategy(0), + upper_item(0) + {} void cleanup(); subs_type substype() { return IN_SUBS; } void reset() @@ -424,13 +476,10 @@ public: null_value= 0; was_null= 0; } - trans_res select_transformer(JOIN *join); - trans_res select_in_like_transformer(JOIN *join, Comp_creator *func); - trans_res single_value_transformer(JOIN *join, Comp_creator *func); - trans_res row_value_transformer(JOIN * join); - trans_res single_value_in_to_exists_transformer(JOIN * join, - Comp_creator *func); - trans_res row_value_in_to_exists_transformer(JOIN * join); + bool select_transformer(JOIN *join); + bool create_in_to_exists_cond(JOIN *join_arg); + bool inject_in_to_exists_cond(JOIN *join_arg); + virtual bool exec(); longlong val_int(); double val_real(); @@ -443,13 +492,13 @@ public: bool test_limit(st_select_lex_unit *unit); virtual void print(String *str, enum_query_type query_type); bool fix_fields(THD *thd, Item **ref); + void fix_length_and_dec(); void fix_after_pullout(st_select_lex *new_parent, Item **ref); void update_used_tables(); - bool setup_engine(); + bool setup_mat_engine(); 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; } - bool is_expensive_processor(uchar *arg); bool expr_cache_is_needed(THD *thd); /* @@ -471,7 +520,6 @@ class Item_allany_subselect :public Item_in_subselect { public: chooser_compare_func_creator func_creator; - Comp_creator *func; bool all; Item_allany_subselect(Item * left_expr, chooser_compare_func_creator fc, @@ -479,8 +527,11 @@ public: // only ALL subquery has upper not subs_type substype() { return all?ALL_SUBS:ANY_SUBS; } - trans_res select_transformer(JOIN *join); + bool select_transformer(JOIN *join); + void create_comp_func(bool invert) { func= func_creator(invert); } virtual void print(String *str, enum_query_type query_type); + bool is_maxmin_applicable(JOIN *join); + bool transform_into_max_min(JOIN *join); }; @@ -552,7 +603,8 @@ public: static table_map calc_const_tables(TABLE_LIST *); virtual void print(String *str, enum_query_type query_type)= 0; virtual bool change_result(Item_subselect *si, - select_result_interceptor *result)= 0; + select_result_interceptor *result, + bool temp= FALSE)= 0; virtual bool no_tables()= 0; virtual bool is_executed() const { return FALSE; } /* Check if subquery produced any rows during last query execution */ @@ -584,7 +636,9 @@ public: void exclude(); table_map upper_select_const_tables(); virtual void print (String *str, enum_query_type query_type); - bool change_result(Item_subselect *si, select_result_interceptor *result); + bool change_result(Item_subselect *si, + select_result_interceptor *result, + bool temp); bool no_tables(); bool may_be_null(); bool is_executed() const { return executed; } @@ -613,7 +667,9 @@ public: void exclude(); table_map upper_select_const_tables(); virtual void print (String *str, enum_query_type query_type); - bool change_result(Item_subselect *si, select_result_interceptor *result); + bool change_result(Item_subselect *si, + select_result_interceptor *result, + bool temp= FALSE); bool no_tables(); bool is_executed() const; bool no_rows(); @@ -665,11 +721,13 @@ public: void fix_length_and_dec(Item_cache** row); int exec(); uint cols() { return 1; } - uint8 uncacheable() { return UNCACHEABLE_DEPENDENT; } + uint8 uncacheable() { return UNCACHEABLE_DEPENDENT_INJECTED; } void exclude(); table_map upper_select_const_tables() { return 0; } virtual void print (String *str, enum_query_type query_type); - bool change_result(Item_subselect *si, select_result_interceptor *result); + bool change_result(Item_subselect *si, + select_result_interceptor *result, + bool temp= FALSE); bool no_tables(); int index_lookup(); /* TIMOUR: this method needs refactoring. */ int scan_table(); @@ -817,10 +875,9 @@ public: {} ~subselect_hash_sj_engine(); - bool init_permanent(List<Item> *tmp_columns); - bool init_runtime(); + bool init(List<Item> *tmp_columns); void cleanup(); - int prepare() { return 0; } /* Override virtual function in base class. */ + int prepare(); int exec(); virtual void print(String *str, enum_query_type query_type); uint cols() @@ -838,7 +895,9 @@ public: void fix_length_and_dec(Item_cache** row);//=>base class void exclude(); //=>base class //=>base class - bool change_result(Item_subselect *si, select_result_interceptor *result); + bool change_result(Item_subselect *si, + select_result_interceptor *result, + bool temp= FALSE); bool no_tables();//=>base class }; @@ -1065,7 +1124,9 @@ public: uint8 uncacheable() { return UNCACHEABLE_DEPENDENT; } void exclude() {} table_map upper_select_const_tables() { return 0; } - bool change_result(Item_subselect*, select_result_interceptor*) + bool change_result(Item_subselect*, + select_result_interceptor*, + bool temp= FALSE) { DBUG_ASSERT(FALSE); return false; } bool no_tables() { return false; } bool no_rows() diff --git a/sql/item_sum.cc b/sql/item_sum.cc index 51754fbd9ee..2479f8ea92a 100644 --- a/sql/item_sum.cc +++ b/sql/item_sum.cc @@ -1049,9 +1049,10 @@ bool Item_sum_distinct::unique_walk_function(void *element) void Item_sum_distinct::clear() { DBUG_ENTER("Item_sum_distinct::clear"); - DBUG_ASSERT(tree != 0); /* we always have a tree */ + /* During EXPLAIN there is no tree because it is created during execution. */ + if (tree != 0) + tree->reset(); null_value= 1; - tree->reset(); is_evaluated= FALSE; DBUG_VOID_RETURN; } diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h index 9c4b887091a..4adcc078eeb 100644 --- a/sql/mysql_priv.h +++ b/sql/mysql_priv.h @@ -570,26 +570,32 @@ protected: #define OPTIMIZER_SWITCH_FIRSTMATCH 64 #define OPTIMIZER_SWITCH_LOOSE_SCAN 128 #define OPTIMIZER_SWITCH_MATERIALIZATION 256 -#define OPTIMIZER_SWITCH_SEMIJOIN 512 -#define OPTIMIZER_SWITCH_PARTIAL_MATCH_ROWID_MERGE 1024 -#define OPTIMIZER_SWITCH_PARTIAL_MATCH_TABLE_SCAN (1<<11) -#define OPTIMIZER_SWITCH_SUBQUERY_CACHE (1<<12) -#define OPTIMIZER_SWITCH_MRR_SORT_KEYS (1<<13) -#define OPTIMIZER_SWITCH_OUTER_JOIN_WITH_CACHE (1<<14) -#define OPTIMIZER_SWITCH_SEMIJOIN_WITH_CACHE (1<<15) -#define OPTIMIZER_SWITCH_JOIN_CACHE_INCREMENTAL (1<<16) -#define OPTIMIZER_SWITCH_JOIN_CACHE_HASHED (1<<17) -#define OPTIMIZER_SWITCH_JOIN_CACHE_BKA (1<<18) -#define OPTIMIZER_SWITCH_OPTIMIZE_JOIN_BUFFER_SIZE (1<<19) +#define OPTIMIZER_SWITCH_IN_TO_EXISTS 512 +#define OPTIMIZER_SWITCH_SEMIJOIN 1024 +#define OPTIMIZER_SWITCH_PARTIAL_MATCH_ROWID_MERGE (1<<11) +#define OPTIMIZER_SWITCH_PARTIAL_MATCH_TABLE_SCAN (1<<12) +#define OPTIMIZER_SWITCH_SUBQUERY_CACHE (1<<13) +#define OPTIMIZER_SWITCH_MRR_SORT_KEYS (1<<14) +#define OPTIMIZER_SWITCH_OUTER_JOIN_WITH_CACHE (1<<15) +#define OPTIMIZER_SWITCH_SEMIJOIN_WITH_CACHE (1<<16) +#define OPTIMIZER_SWITCH_JOIN_CACHE_INCREMENTAL (1<<17) +#define OPTIMIZER_SWITCH_JOIN_CACHE_HASHED (1<<18) +#define OPTIMIZER_SWITCH_JOIN_CACHE_BKA (1<<19) +#define OPTIMIZER_SWITCH_OPTIMIZE_JOIN_BUFFER_SIZE (1<<20) #ifdef DBUG_OFF -# define OPTIMIZER_SWITCH_LAST (1<<20) -#else -# define OPTIMIZER_SWITCH_TABLE_ELIMINATION (1<<20) # define OPTIMIZER_SWITCH_LAST (1<<21) +#else +# define OPTIMIZER_SWITCH_TABLE_ELIMINATION (1<<21) +# define OPTIMIZER_SWITCH_LAST (1<<22) #endif #ifdef DBUG_OFF /* The following must be kept in sync with optimizer_switch_str in mysqld.cc */ +/* +TODO: Materialization is off by default to mimic 5.1/5.2 behavior. +Once cost based choice between materialization and in-to-exists should be +enabled by default, add OPTIMIZER_SWITCH_MATERIALIZATION +*/ # define OPTIMIZER_SWITCH_DEFAULT (OPTIMIZER_SWITCH_INDEX_MERGE | \ OPTIMIZER_SWITCH_INDEX_MERGE_UNION | \ OPTIMIZER_SWITCH_INDEX_MERGE_SORT_UNION | \ @@ -597,7 +603,7 @@ protected: OPTIMIZER_SWITCH_INDEX_COND_PUSHDOWN | \ OPTIMIZER_SWITCH_FIRSTMATCH | \ OPTIMIZER_SWITCH_LOOSE_SCAN | \ - OPTIMIZER_SWITCH_MATERIALIZATION | \ + OPTIMIZER_SWITCH_IN_TO_EXISTS | \ OPTIMIZER_SWITCH_SEMIJOIN | \ OPTIMIZER_SWITCH_PARTIAL_MATCH_ROWID_MERGE|\ OPTIMIZER_SWITCH_PARTIAL_MATCH_TABLE_SCAN|\ @@ -617,7 +623,7 @@ protected: OPTIMIZER_SWITCH_TABLE_ELIMINATION | \ OPTIMIZER_SWITCH_FIRSTMATCH | \ OPTIMIZER_SWITCH_LOOSE_SCAN | \ - OPTIMIZER_SWITCH_MATERIALIZATION | \ + OPTIMIZER_SWITCH_IN_TO_EXISTS | \ OPTIMIZER_SWITCH_SEMIJOIN | \ OPTIMIZER_SWITCH_PARTIAL_MATCH_ROWID_MERGE|\ OPTIMIZER_SWITCH_PARTIAL_MATCH_TABLE_SCAN|\ @@ -672,15 +678,30 @@ protected: */ #define CONTEXT_ANALYSIS_ONLY_DERIVED 4 -// uncachable cause -#define UNCACHEABLE_DEPENDENT 1 -#define UNCACHEABLE_RAND 2 -#define UNCACHEABLE_SIDEEFFECT 4 -/// forcing to save JOIN for explain -#define UNCACHEABLE_EXPLAIN 8 +/* + Uncachable causes: + +This subquery has fields from outer query (put by user) +*/ +#define UNCACHEABLE_DEPENDENT_GENERATED 1 +/* This subquery contains functions with random result */ +#define UNCACHEABLE_RAND 2 +/* This subquery contains functions with side effect */ +#define UNCACHEABLE_SIDEEFFECT 4 +/* Forcing to save JOIN tables for explain */ +#define UNCACHEABLE_EXPLAIN 8 /* For uncorrelated SELECT in an UNION with some correlated SELECTs */ -#define UNCACHEABLE_UNITED 16 -#define UNCACHEABLE_CHECKOPTION 32 +#define UNCACHEABLE_UNITED 16 +#define UNCACHEABLE_CHECKOPTION 32 +/* + This subquery has fields from outer query injected during + transformation process +*/ +#define UNCACHEABLE_DEPENDENT_INJECTED 64 + +/* This subquery has fields from outer query (any nature) */ +#define UNCACHEABLE_DEPENDENT (UNCACHEABLE_DEPENDENT_GENERATED | \ + UNCACHEABLE_DEPENDENT_INJECTED) /* Used to check GROUP BY list in the MODE_ONLY_FULL_GROUP_BY mode */ #define UNDEF_POS (-1) @@ -1640,6 +1661,7 @@ inline bool setup_fields_with_no_wrap(THD *thd, Item **ref_pointer_array, } int setup_conds(THD *thd, TABLE_LIST *tables, TABLE_LIST *leaves, COND **conds); +void wrap_ident(THD *thd, Item **conds); int setup_ftfuncs(SELECT_LEX* select); int init_ftfuncs(THD *thd, SELECT_LEX* select, bool no_order); void wait_for_condition(THD *thd, pthread_mutex_t *mutex, diff --git a/sql/mysqld.cc b/sql/mysqld.cc index 3f14ee470a4..b3c1fa17ef9 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -335,7 +335,7 @@ static const char *optimizer_switch_names[]= "index_merge","index_merge_union","index_merge_sort_union", "index_merge_intersection","index_merge_sort_intersection", "index_condition_pushdown", - "firstmatch","loosescan","materialization", "semijoin", + "firstmatch","loosescan","materialization","in_to_exists","semijoin", "partial_match_rowid_merge", "partial_match_table_scan", "subquery_cache", @@ -364,6 +364,7 @@ static const unsigned int optimizer_switch_names_len[]= sizeof("firstmatch") - 1, sizeof("loosescan") - 1, sizeof("materialization") - 1, + sizeof("in_to_exists") - 1, sizeof("semijoin") - 1, sizeof("partial_match_rowid_merge") - 1, sizeof("partial_match_table_scan") - 1, @@ -471,7 +472,8 @@ static const char *optimizer_switch_str="index_merge=on,index_merge_union=on," "index_condition_pushdown=on," "firstmatch=on," "loosescan=on," - "materialization=on," + "materialization=off," + "in_to_exists=on," "semijoin=on," "partial_match_rowid_merge=on," "partial_match_table_scan=on," @@ -7497,7 +7499,7 @@ each time the SQL thread starts.", "optimizer_switch=option=val[,option=val...], where option={index_merge, " "index_merge_union, index_merge_sort_union, index_merge_intersection, " "index_merge_sort_intersection, " - "index_condition_pushdown, firstmatch, loosescan, materialization, " + "index_condition_pushdown, firstmatch, loosescan, materialization, in_to_exists, " "semijoin, partial_match_rowid_merge, partial_match_table_scan, " "subquery_cache, outer_join_with_cache, semijoin_with_cache, " "join_cache_incremental, join_cache_hashed, join_cache_bka, " diff --git a/sql/opt_range.cc b/sql/opt_range.cc index eae344f378f..102fd881d9f 100644 --- a/sql/opt_range.cc +++ b/sql/opt_range.cc @@ -11104,7 +11104,7 @@ static bool get_constant_key_infix(KEY *index_info, SEL_ARG *index_range_tree, uchar *key_infix, uint *key_infix_len, KEY_PART_INFO **first_non_infix_part); static bool -check_group_min_max_predicates(COND *cond, Item_field *min_max_arg_item, +check_group_min_max_predicates(Item *cond, Item_field *min_max_arg_item, Field::imagetype image_type); static void @@ -11678,14 +11678,14 @@ get_best_group_min_max(PARAM *param, SEL_TREE *tree) */ static bool -check_group_min_max_predicates(COND *cond, Item_field *min_max_arg_item, +check_group_min_max_predicates(Item *cond, Item_field *min_max_arg_item, Field::imagetype image_type) { DBUG_ENTER("check_group_min_max_predicates"); DBUG_ASSERT(cond && min_max_arg_item); cond= cond->real_item(); - Item::Type cond_type= cond->type(); + Item::Type cond_type= cond->real_type(); if (cond_type == Item::COND_ITEM) /* 'AND' or 'OR' */ { DBUG_PRINT("info", ("Analyzing: %s", ((Item_func*) cond)->func_name())); @@ -11701,16 +11701,25 @@ check_group_min_max_predicates(COND *cond, Item_field *min_max_arg_item, } /* - TODO: - This is a very crude fix to handle sub-selects in the WHERE clause - (Item_subselect objects). With the test below we rule out from the - optimization all queries with subselects in the WHERE clause. What has to - be done, is that here we should analyze whether the subselect references - the MIN/MAX argument field, and disallow the optimization only if this is - so. + Disallow loose index scan if the MIN/MAX argument field is referenced by + a subquery in the WHERE clause. */ - if (cond->real_type() == Item::SUBSELECT_ITEM) - DBUG_RETURN(FALSE); + if (cond_type == Item::SUBSELECT_ITEM) + { + Item_subselect *subs_cond= (Item_subselect*) cond; + if (subs_cond->is_correlated) + { + DBUG_ASSERT(subs_cond->depends_on.elements > 0); + List_iterator_fast<Item*> li(subs_cond->depends_on); + Item **dep; + while ((dep= li++)) + { + if ((*dep)->eq(min_max_arg_item, FALSE)) + DBUG_RETURN(FALSE); + } + } + DBUG_RETURN(TRUE); + } /* Condition of the form 'field' is equivalent to 'field <> 0' and thus diff --git a/sql/opt_subselect.cc b/sql/opt_subselect.cc index e12412299c5..505f336006b 100644 --- a/sql/opt_subselect.cc +++ b/sql/opt_subselect.cc @@ -29,6 +29,10 @@ static TABLE_LIST *alloc_join_nest(THD *thd); static void fix_list_after_tbl_changes(SELECT_LEX *new_parent, List<TABLE_LIST> *tlist); static uint get_tmp_table_rec_length(List<Item> &items); +static double get_tmp_table_lookup_cost(THD *thd, double row_count, + uint row_size); +static double get_tmp_table_write_cost(THD *thd, double row_count, + uint row_size); bool find_eq_ref_candidate(TABLE *table, table_map sj_inner_tables); static SJ_MATERIALIZATION_INFO * at_sjmat_pos(const JOIN *join, table_map remaining_tables, const JOIN_TAB *tab, @@ -67,6 +71,7 @@ int check_and_do_in_subquery_rewrites(JOIN *join) { THD *thd=join->thd; st_select_lex *select_lex= join->select_lex; + st_select_lex_unit* parent_unit= select_lex->master_unit(); DBUG_ENTER("check_and_do_in_subquery_rewrites"); /* If @@ -85,11 +90,22 @@ int check_and_do_in_subquery_rewrites(JOIN *join) */ Item_subselect *subselect; if (!(thd->lex->context_analysis_only & CONTEXT_ANALYSIS_ONLY_VIEW) && // (1) - (subselect= select_lex->master_unit()->item)) // (2) + (subselect= parent_unit->item)) // (2) { Item_in_subselect *in_subs= NULL; - if (subselect->substype() == Item_subselect::IN_SUBS) - in_subs= (Item_in_subselect*)subselect; + Item_allany_subselect *allany_subs= NULL; + switch (subselect->substype()) { + case Item_subselect::IN_SUBS: + in_subs= (Item_in_subselect *)subselect; + break; + case Item_subselect::ALL_SUBS: + case Item_subselect::ANY_SUBS: + allany_subs= (Item_allany_subselect *)subselect; + break; + default: + break; + } + /* Resolve expressions and perform semantic analysis for IN query */ if (in_subs != NULL) @@ -129,6 +145,15 @@ int check_and_do_in_subquery_rewrites(JOIN *join) if (failure) DBUG_RETURN(-1); /* purecov: deadcode */ } + if (select_lex == parent_unit->fake_select_lex) + { + /* + The join and its select_lex object represent the 'fake' select used + to compute the result of a UNION. + */ + DBUG_RETURN(0); + } + DBUG_PRINT("info", ("Checking if subq can be converted to semi-join")); /* Check if we're in subquery that is a candidate for flattening into a @@ -154,8 +179,8 @@ int check_and_do_in_subquery_rewrites(JOIN *join) !join->having && !select_lex->with_sum_func && // 4 thd->thd_marker.emb_on_expr_nest && // 5 select_lex->outer_select()->join && // 6 - select_lex->master_unit()->first_select()->leaf_tables && // 7 - in_subs->exec_method == Item_in_subselect::NOT_TRANSFORMED && // 8 + parent_unit->first_select()->leaf_tables && // 7 + !in_subs->in_strategy && // 8 select_lex->outer_select()->leaf_tables && // 9 !((join->select_options | // 10 select_lex->outer_select()->join->select_options) // 10 @@ -175,63 +200,86 @@ int check_and_do_in_subquery_rewrites(JOIN *join) else { DBUG_PRINT("info", ("Subquery can't be converted to semi-join")); - /* - Check if the subquery predicate can be executed via materialization. - The required conditions are: - 1. Subquery predicate is an IN/=ANY subq predicate - 2. Subquery is a single SELECT (not a UNION) - 3. Subquery is not a table-less query. In this case there is no - point in materializing. - 3A The upper query is not a table-less SELECT ... FROM DUAL. We + /* Test if the user has set a legal combination of optimizer switches. */ + if (!optimizer_flag(thd, OPTIMIZER_SWITCH_IN_TO_EXISTS) && + !optimizer_flag(thd, OPTIMIZER_SWITCH_MATERIALIZATION)) + my_error(ER_ILLEGAL_SUBQUERY_OPTIMIZER_SWITCHES, MYF(0)); + + if (in_subs) + { + /* Subquery predicate is an IN/=ANY predicate. */ + if (optimizer_flag(thd, OPTIMIZER_SWITCH_IN_TO_EXISTS)) + in_subs->in_strategy|= SUBS_IN_TO_EXISTS; + if (optimizer_flag(thd, OPTIMIZER_SWITCH_MATERIALIZATION)) + in_subs->in_strategy|= SUBS_MATERIALIZATION; + + /* + Check if the subquery predicate can be executed via materialization. + The required conditions are: + 1. Subquery is a single SELECT (not a UNION) + 2. Subquery is not a table-less query. In this case there is no + point in materializing. + 2A The upper query is not a table-less SELECT ... FROM DUAL. We can't do materialization for SELECT .. FROM DUAL because it does not call setup_subquery_materialization(). We could make SELECT ... FROM DUAL call that function but that doesn't seem to be the case that is worth handling. - 4. Either the subquery predicate is a top-level predicate, or at - least one partial match strategy is enabled. If no partial match - strategy is enabled, then materialization cannot be used for - non-top-level queries because it cannot handle NULLs correctly. - 5. Subquery is non-correlated - TODO: - This is an overly restrictive condition. It can be extended to: - (Subquery is non-correlated || - Subquery is correlated to any query outer to IN predicate || - (Subquery is correlated to the immediate outer query && - Subquery !contains {GROUP BY, ORDER BY [LIMIT], - aggregate functions}) && subquery predicate is not under "NOT IN")) - 6. No execution method was already chosen (by a prepared statement). - - (*) The subquery must be part of a SELECT statement. The current - condition also excludes multi-table update statements. - - Determine whether we will perform subquery materialization before - calling the IN=>EXISTS transformation, so that we know whether to - perform the whole transformation or only that part of it which wraps - Item_in_subselect in an Item_in_optimizer. - */ - if (optimizer_flag(thd, OPTIMIZER_SWITCH_MATERIALIZATION) && - in_subs && // 1 - !select_lex->is_part_of_union() && // 2 - select_lex->master_unit()->first_select()->leaf_tables && // 3 - thd->lex->sql_command == SQLCOM_SELECT && // * - select_lex->outer_select()->leaf_tables && // 3A - subquery_types_allow_materialization(in_subs) && - // psergey-todo: duplicated_subselect_card_check: where it's done? - (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->exec_method= Item_in_subselect::MATERIALIZATION; - } + 3. Either the subquery predicate is a top-level predicate, or at + least one partial match strategy is enabled. If no partial match + strategy is enabled, then materialization cannot be used for + non-top-level queries because it cannot handle NULLs correctly. + 4. Subquery is non-correlated + TODO: + This is an overly restrictive condition. It can be extended to: + (Subquery is non-correlated || + Subquery is correlated to any query outer to IN predicate || + (Subquery is correlated to the immediate outer query && + Subquery !contains {GROUP BY, ORDER BY [LIMIT], + aggregate functions}) && subquery predicate is not under "NOT IN")) + + (*) The subquery must be part of a SELECT statement. The current + condition also excludes multi-table update statements. + */ + if (!(in_subs->in_strategy & SUBS_MATERIALIZATION && + !select_lex->is_part_of_union() && // 1 + parent_unit->first_select()->leaf_tables && // 2 + thd->lex->sql_command == SQLCOM_SELECT && // * + select_lex->outer_select()->leaf_tables && // 2A + subquery_types_allow_materialization(in_subs) && + // psergey-todo: duplicated_subselect_card_check: where it's done? + (in_subs->is_top_level_item() || //3 + optimizer_flag(thd, + OPTIMIZER_SWITCH_PARTIAL_MATCH_ROWID_MERGE) || //3 + optimizer_flag(thd, + OPTIMIZER_SWITCH_PARTIAL_MATCH_TABLE_SCAN)) && //3 + !in_subs->is_correlated)) //4 + { + /* Materialization is not possible based on syntactic properties. */ + in_subs->in_strategy&= ~SUBS_MATERIALIZATION; + } - Item_subselect::trans_res trans_res; - if ((trans_res= subselect->select_transformer(join)) != - Item_subselect::RES_OK) - { - DBUG_RETURN((trans_res == Item_subselect::RES_ERROR)); + if (!in_subs->in_strategy) + { + /* + If neither materialization is possible, nor the user chose + IN-TO-EXISTS, choose IN-TO-EXISTS as the only universal strategy. + */ + in_subs->in_strategy|= SUBS_IN_TO_EXISTS; + } } + + /* Check if max/min optimization applicable */ + if (allany_subs) + allany_subs->in_strategy|= (allany_subs->is_maxmin_applicable(join) ? + SUBS_MAXMIN : + SUBS_IN_TO_EXISTS); + + /* + Transform each subquery predicate according to its overloaded + transformer. + */ + if (subselect->select_transformer(join)) + DBUG_RETURN(-1); } } DBUG_RETURN(0); @@ -338,6 +386,22 @@ bool subquery_types_allow_materialization(Item_in_subselect *in_subs) } +/** + Apply max min optimization of all/any subselect +*/ + +bool JOIN::transform_max_min_subquery() +{ + DBUG_ENTER("JOIN::transform_max_min_subquery"); + Item_subselect *subselect= unit->item; + if (!subselect || (subselect->substype() != Item_subselect::ALL_SUBS && + subselect->substype() != Item_subselect::ANY_SUBS)) + DBUG_RETURN(0); + DBUG_RETURN(((Item_allany_subselect *) subselect)-> + transform_into_max_min(this)); +} + + /* Convert semi-join subquery predicates into semi-join join nests @@ -473,18 +537,17 @@ skip_conversion: for (; in_subq!= in_subq_end; in_subq++) { JOIN *child_join= (*in_subq)->unit->first_select()->join; - Item_subselect::trans_res res; (*in_subq)->changed= 0; (*in_subq)->fixed= 0; SELECT_LEX *save_select_lex= thd->lex->current_select; thd->lex->current_select= (*in_subq)->unit->first_select(); - res= (*in_subq)->select_transformer(child_join); + bool res= (*in_subq)->select_transformer(child_join); thd->lex->current_select= save_select_lex; - if (res == Item_subselect::RES_ERROR) + if (res) DBUG_RETURN(TRUE); (*in_subq)->changed= 1; @@ -509,6 +572,15 @@ skip_conversion: FALSE)) DBUG_RETURN(TRUE); } + /* + Revert to the IN->EXISTS strategy in the rare case when the subquery could + not be flattened. + TODO: This is a limitation done for simplicity. Such subqueries could also + be executed via materialization. In order to determine this, we should + re-run the test for materialization that was done in + check_and_do_in_subquery_rewrites. + */ + (*in_subq)->in_strategy= SUBS_IN_TO_EXISTS; } if (arena) @@ -769,8 +841,7 @@ 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->in_strategy= SUBS_SEMI_JOIN; // for subsequent executions /*TODO: also reset the 'with_subselect' there. */ /* n. Adjust the parent_join->tables counter */ @@ -872,7 +943,14 @@ static bool convert_subq_to_sj(JOIN *parent_join, Item_in_subselect *subq_pred) { /* Inject into the WHERE */ parent_join->conds= and_items(parent_join->conds, sj_nest->sj_on_expr); + /* + fix_fields must update the properties (e.g. st_select_lex::cond_count of + the correct select_lex. + */ + save_lex= thd->lex->current_select; + thd->lex->current_select=parent_join->select_lex; parent_join->conds->fix_fields(parent_join->thd, &parent_join->conds); + thd->lex->current_select=save_lex; parent_join->select_lex->where= parent_join->conds; } @@ -1167,8 +1245,8 @@ bool optimize_semijoin_nests(JOIN *join, table_map all_table_map) sjm->tables= n_tables; sjm->is_used= FALSE; double subjoin_out_rows, subjoin_read_time; - get_partial_join_cost(join, n_tables, - &subjoin_read_time, &subjoin_out_rows); + join->get_partial_join_cost(n_tables + join->const_tables, + &subjoin_read_time, &subjoin_out_rows); sjm->materialization_cost.convert_from_cost(subjoin_read_time); sjm->rows= subjoin_out_rows; @@ -1216,17 +1294,16 @@ bool optimize_semijoin_nests(JOIN *join, table_map all_table_map) Calculate temporary table parameters and usage costs */ uint rowlen= get_tmp_table_rec_length(right_expr_list); - double lookup_cost; - if (rowlen * subjoin_out_rows< join->thd->variables.max_heap_table_size) - lookup_cost= HEAP_TEMPTABLE_LOOKUP_COST; - else - lookup_cost= DISK_TEMPTABLE_LOOKUP_COST; + double lookup_cost= get_tmp_table_lookup_cost(join->thd, + subjoin_out_rows, rowlen); + double write_cost= get_tmp_table_write_cost(join->thd, + subjoin_out_rows, rowlen); /* Let materialization cost include the cost to write the data into the temporary table: */ - sjm->materialization_cost.add_io(subjoin_out_rows, lookup_cost); + sjm->materialization_cost.add_io(subjoin_out_rows, write_cost); /* Set the cost to do a full scan of the temptable (will need this to @@ -1301,6 +1378,51 @@ static uint get_tmp_table_rec_length(List<Item> &items) return len; } + +/** + The cost of a lookup into a unique hash/btree index on a temporary table + with 'row_count' rows each of size 'row_size'. + + @param thd current query context + @param row_count number of rows in the temp table + @param row_size average size in bytes of the rows + + @return the cost of one lookup +*/ + +static double +get_tmp_table_lookup_cost(THD *thd, double row_count, uint row_size) +{ + if (row_count * row_size > thd->variables.max_heap_table_size) + return (double) DISK_TEMPTABLE_LOOKUP_COST; + else + return (double) HEAP_TEMPTABLE_LOOKUP_COST; +} + +/** + The cost of writing a row into a temporary table with 'row_count' unique + rows each of size 'row_size'. + + @param thd current query context + @param row_count number of rows in the temp table + @param row_size average size in bytes of the rows + + @return the cost of writing one row +*/ + +static double +get_tmp_table_write_cost(THD *thd, double row_count, uint row_size) +{ + double lookup_cost= get_tmp_table_lookup_cost(thd, row_count, row_size); + /* + TODO: + This is an optimistic estimate. Add additional costs resulting from + actually writing the row to memory/disk and possible index reorganization. + */ + return lookup_cost; +} + + //psergey-todo: is the below a kind of table elimination?? /* Check if table's KEYUSE elements have an eq_ref(outer_tables) candidate @@ -1830,15 +1952,15 @@ void advance_sj_state(JOIN *join, table_map remaining_tables, - sj_inner_fanout*sj_outer_fanout lookups. */ - double one_lookup_cost; - if (sj_outer_fanout*temptable_rec_size > - join->thd->variables.max_heap_table_size) - one_lookup_cost= DISK_TEMPTABLE_LOOKUP_COST; - else - one_lookup_cost= HEAP_TEMPTABLE_LOOKUP_COST; + double one_lookup_cost= get_tmp_table_lookup_cost(join->thd, + sj_outer_fanout, + temptable_rec_size); + double one_write_cost= get_tmp_table_write_cost(join->thd, + sj_outer_fanout, + temptable_rec_size); double write_cost= join->positions[first_tab].prefix_record_count* - sj_outer_fanout * one_lookup_cost; + sj_outer_fanout * one_write_cost; double full_lookup_cost= join->positions[first_tab].prefix_record_count* sj_outer_fanout* sj_inner_fanout * one_lookup_cost; @@ -3360,9 +3482,23 @@ int rewrite_to_index_subquery_engine(JOIN *join) JOIN_TAB* join_tab=join->join_tab; SELECT_LEX_UNIT *unit= join->unit; DBUG_ENTER("rewrite_to_index_subquery_engine"); + /* is this simple IN subquery? */ + /* TODO: In order to use these more efficient subquery engines in more cases, + the following problems need to be solved: + - the code that removes GROUP BY (group_list), also adds an ORDER BY + (order), thus GROUP BY queries (almost?) never pass through this branch. + Solution: remove the test below '!join->order', because we remove the + ORDER clase for subqueries anyway. + - in order to set a more efficient engine, the optimizer needs to both + decide to remove GROUP BY, *and* select one of the JT_[EQ_]REF[_OR_NULL] + access methods, *and* loose scan should be more expensive or + inapliccable. When is that possible? + - Consider expanding the applicability of this rewrite for loose scan + for group by queries. + */ if (!join->group_list && !join->order && join->unit->item && join->unit->item->substype() == Item_subselect::IN_SUBS && @@ -3503,3 +3639,355 @@ static void remove_subq_pushed_predicates(JOIN *join, Item **where) } +/** + Optimize all subqueries of a query that have were flattened into a semijoin. + + @details + Optimize all immediate children subqueries of a query. + + This phase must be called after substitute_for_best_equal_field() because + that function may replace items with other items from a multiple equality, + and we need to reference the correct items in the index access method of the + IN predicate. + + @return Operation status + @retval FALSE success. + @retval TRUE error occurred. +*/ + +bool JOIN::optimize_unflattened_subqueries() +{ + return select_lex->optimize_unflattened_subqueries(); +} + + +/** + Choose an optimal strategy to execute an IN/ALL/ANY subquery predicate + based on cost. + + @param join_tables the set of tables joined in the subquery + + @notes + The method chooses between the materialization and IN=>EXISTS rewrite + strategies for the execution of a non-flattened subquery IN predicate. + The cost-based decision is made as follows: + + 1. compute materialize_strategy_cost based on the unmodified subquery + 2. reoptimize the subquery taking into account the IN-EXISTS predicates + 3. compute in_exists_strategy_cost based on the reoptimized plan + 4. compare and set the cheaper strategy + if (materialize_strategy_cost >= in_exists_strategy_cost) + in_strategy = MATERIALIZATION + else + in_strategy = IN_TO_EXISTS + 5. if in_strategy = MATERIALIZATION and it is not possible to initialize it + revert to IN_TO_EXISTS + 6. if (in_strategy == MATERIALIZATION) + revert the subquery plan to the original one before reoptimizing + else + inject the IN=>EXISTS predicates into the new EXISTS subquery plan + + The implementation itself is a bit more complicated because it takes into + account two more factors: + - whether the user allowed both strategies through an optimizer_switch, and + - if materialization was the cheaper strategy, whether it can be executed + or not. + + @retval FALSE success. + @retval TRUE error occurred. +*/ + +bool JOIN::choose_subquery_plan(table_map join_tables) +{ + Query_plan_state save_qep; /* The original QEP of the subquery. */ + enum_reopt_result reopt_result= REOPT_NONE; + Item_in_subselect *in_subs; + + if (select_lex->master_unit()->item && + select_lex->master_unit()->item->is_in_predicate()) + { + in_subs= (Item_in_subselect*) select_lex->master_unit()->item; + if (in_subs->create_in_to_exists_cond(this)) + return true; + } + else + return false; + + DBUG_ASSERT(in_subs->in_strategy); /* A strategy must be chosen earlier. */ + DBUG_ASSERT(in_to_exists_where || in_to_exists_having); + DBUG_ASSERT(!in_to_exists_where || in_to_exists_where->fixed); + DBUG_ASSERT(!in_to_exists_having || in_to_exists_having->fixed); + + /* + Compute and compare the costs of materialization and in-exists if both + strategies are possible and allowed by the user (checked during the prepare + phase. + */ + if (in_subs->in_strategy & SUBS_MATERIALIZATION && + in_subs->in_strategy & SUBS_IN_TO_EXISTS) + { + JOIN *outer_join; + JOIN *inner_join= this; + /* Number of (partial) rows of the outer JOIN filtered by the IN predicate. */ + double outer_record_count; + /* Number of unique value combinations filtered by the IN predicate. */ + double outer_lookup_keys; + /* Cost and row count of the unmodified subquery. */ + double inner_read_time_1, inner_record_count_1; + /* Cost of the subquery with injected IN-EXISTS predicates. */ + double inner_read_time_2; + /* The cost to compute IN via materialization. */ + double materialize_strategy_cost; + /* The cost of the IN->EXISTS strategy. */ + double in_exists_strategy_cost; + double dummy; + + /* + A. Estimate the number of rows of the outer table that will be filtered + by the IN predicate. + */ + outer_join= unit->outer_select() ? unit->outer_select()->join : NULL; + if (outer_join) + { + uint outer_partial_plan_len; + /* + Make_cond_for_table is called for predicates only in the WHERE/ON + clauses. In all other cases, predicates are not pushed to any + JOIN_TAB, and their joi_tab_idx remains MAX_TABLES. Such predicates + are evaluated for each complete row of the outer join. + */ + outer_partial_plan_len= (in_subs->get_join_tab_idx() == MAX_TABLES) ? + outer_join->tables : + in_subs->get_join_tab_idx() + 1; + outer_join->get_partial_join_cost(outer_partial_plan_len, &dummy, + &outer_record_count); + if (outer_join->tables > outer_join->const_tables) + outer_lookup_keys= prev_record_reads(outer_join->best_positions, + outer_partial_plan_len, + in_subs->used_tables()); + else + { + /* If all tables are constant, positions is undefined. */ + outer_lookup_keys= 1; + } + } + else + { + /* + TODO: outer_join can be NULL for DELETE statements. + How to compute its cost? + */ + outer_record_count= 1; + outer_lookup_keys=1; + } + /* + There cannot be more lookup keys than the total number of records. + TODO: this a temporary solution until we find a better way to compute + get_partial_join_cost() and prev_record_reads() in a consitent manner, + where it is guaranteed that (outer_lookup_keys <= outer_record_count). + */ + if (outer_lookup_keys > outer_record_count) + outer_lookup_keys= outer_record_count; + + /* + B. Estimate the cost and number of records of the subquery both + unmodified, and with injected IN->EXISTS predicates. + */ + inner_read_time_1= inner_join->best_read; + inner_record_count_1= inner_join->record_count; + + if (in_to_exists_where && const_tables != tables) + { + /* + Re-optimize and cost the subquery taking into account the IN-EXISTS + conditions. + */ + reopt_result= reoptimize(in_to_exists_where, join_tables, &save_qep); + if (reopt_result == REOPT_ERROR) + return TRUE; + + /* Get the cost of the modified IN-EXISTS plan. */ + inner_read_time_2= inner_join->best_read; + + } + else + { + /* Reoptimization would not produce any better plan. */ + inner_read_time_2= inner_read_time_1; + } + + /* + C. Compute execution costs. + */ + /* C.1 Compute the cost of the materialization strategy. */ + uint rowlen= get_tmp_table_rec_length(unit->first_select()->item_list); + /* The cost of writing one row into the temporary table. */ + double write_cost= get_tmp_table_write_cost(thd, inner_record_count_1, + rowlen); + /* The cost of a lookup into the unique index of the materialized table. */ + double lookup_cost= get_tmp_table_lookup_cost(thd, inner_record_count_1, + rowlen); + /* + The cost of executing the subquery and storing its result in an indexed + temporary table. + */ + double materialization_cost= inner_read_time_1 + + write_cost * inner_record_count_1; + + materialize_strategy_cost= materialization_cost + + outer_record_count * lookup_cost; + + /* C.2 Compute the cost of the IN=>EXISTS strategy. */ + in_exists_strategy_cost= outer_lookup_keys * inner_read_time_2; + + /* C.3 Compare the costs and choose the cheaper strategy. */ + if (materialize_strategy_cost >= in_exists_strategy_cost) + in_subs->in_strategy&= ~SUBS_MATERIALIZATION; + else + in_subs->in_strategy&= ~SUBS_IN_TO_EXISTS; + } + + /* + If (1) materialization is a possible strategy based on semantic analysis + during the prepare phase, then if + (2) it is more expensive than the IN->EXISTS transformation, and + (3) it is not possible to create usable indexes for the materialization + strategy, + fall back to IN->EXISTS. + otherwise + use materialization. + */ + if (in_subs->in_strategy & SUBS_MATERIALIZATION && + in_subs->setup_mat_engine()) + { + /* + If materialization was the cheaper or the only user-selected strategy, + but it is not possible to execute it due to limitations in the + implementation, fall back to IN-TO-EXISTS. + */ + in_subs->in_strategy&= ~SUBS_MATERIALIZATION; + in_subs->in_strategy|= SUBS_IN_TO_EXISTS; + } + + if (in_subs->in_strategy & SUBS_MATERIALIZATION) + { + /* Restore the original query plan used for materialization. */ + if (reopt_result == REOPT_NEW_PLAN) + restore_query_plan(&save_qep); + + in_subs->unit->uncacheable&= ~UNCACHEABLE_DEPENDENT_INJECTED; + select_lex->uncacheable&= ~UNCACHEABLE_DEPENDENT_INJECTED; + + /* + Reset the "LIMIT 1" set in Item_exists_subselect::fix_length_and_dec. + TODO: + Currently we set the subquery LIMIT to infinity, and this is correct + because we forbid at parse time LIMIT inside IN subqueries (see + Item_in_subselect::test_limit). However, once we allow this, here + we should set the correct limit if given in the query. + */ + in_subs->unit->global_parameters->select_limit= NULL; + in_subs->unit->set_limit(unit->global_parameters); + /* + Set the limit of this JOIN object as well, because normally its being + set in the beginning of JOIN::optimize, which was already done. + */ + select_limit= in_subs->unit->select_limit_cnt; + } + else if (in_subs->in_strategy & SUBS_IN_TO_EXISTS) + { + if (reopt_result == REOPT_NONE && in_to_exists_where && + const_tables != tables) + { + /* + The subquery was not reoptimized either because the user allowed only the + IN-EXISTS strategy, or because materialization was not possible based on + semantic analysis. Clenup the original plan and reoptimize. + */ + for (uint i= 0; i < tables; i++) + { + join_tab[i].keyuse= NULL; + join_tab[i].checked_keys.clear_all(); + } + if ((reopt_result= reoptimize(in_to_exists_where, join_tables, NULL)) == + REOPT_ERROR) + return TRUE; + } + + if (in_subs->inject_in_to_exists_cond(this)) + return TRUE; + /* + It is IN->EXISTS transformation so we should mark subquery as + dependent + */ + in_subs->unit->uncacheable|= UNCACHEABLE_DEPENDENT_INJECTED; + select_lex->uncacheable|= UNCACHEABLE_DEPENDENT_INJECTED; + select_limit= 1; + } + else + DBUG_ASSERT(FALSE); + + return FALSE; +} + + +/** + Choose a query plan for a table-less subquery. + + @notes + + @retval FALSE success. + @retval TRUE error occurred. +*/ + +bool JOIN::choose_tableless_subquery_plan() +{ + DBUG_ASSERT(!tables_list || !tables); + if (select_lex->master_unit()->item) + { + DBUG_ASSERT(select_lex->master_unit()->item->type() == + Item::SUBSELECT_ITEM); + Item_subselect *subs_predicate= select_lex->master_unit()->item; + + /* + If the optimizer determined that his query has an empty result, + in most cases the subquery predicate is a known constant value - + either FALSE or NULL. The implementation of Item_subselect::reset() + determines which one. + */ + if (zero_result_cause) + { + if (!implicit_grouping) + { + /* + Both group by queries and non-group by queries without aggregate + functions produce empty subquery result. + */ + subs_predicate->reset(); + subs_predicate->make_const(); + return FALSE; + } + + /* TODO: + A further optimization is possible when a non-group query with + MIN/MAX/COUNT is optimized by opt_sum_query. Then, if there are + only MIN/MAX functions over an empty result set, the subquery + result is a NULL value/row, thus the value of subs_predicate is + NULL. + */ + } + + if (subs_predicate->is_in_predicate()) + { + Item_in_subselect *in_subs; + in_subs= (Item_in_subselect*) subs_predicate; + in_subs->in_strategy= SUBS_IN_TO_EXISTS; + if (in_subs->create_in_to_exists_cond(this) || + in_subs->inject_in_to_exists_cond(this)) + return TRUE; + tmp_having= having; + } + } + return FALSE; +} + diff --git a/sql/share/errmsg.txt b/sql/share/errmsg.txt index d51fb3b181d..547d9bdf0be 100644 --- a/sql/share/errmsg.txt +++ b/sql/share/errmsg.txt @@ -6269,3 +6269,5 @@ ER_DYN_COL_DATA 22007 eng "Illegal value used as argument of dynamic column function" ER_DYN_COL_WRONG_CHARSET eng "Dynamic column contains unknown character set" +ER_ILLEGAL_SUBQUERY_OPTIMIZER_SWITCHES + eng "At least one of the 'in_to_exists' or 'materialization' optimizer_switch flags must be 'on'." diff --git a/sql/sql_base.cc b/sql/sql_base.cc index a733ccd0659..eb58b09fd00 100644 --- a/sql/sql_base.cc +++ b/sql/sql_base.cc @@ -8139,6 +8139,29 @@ insert_fields(THD *thd, Name_resolution_context *context, const char *db_name, } +/** + Wrap Item_ident + + @param thd thread handle + @param conds pointer to the condition which should be wrapped +*/ + +void wrap_ident(THD *thd, Item **conds) +{ + Item_direct_ref_to_ident *wrapper; + DBUG_ASSERT((*conds)->type() == Item::FIELD_ITEM || (*conds)->type() == Item::REF_ITEM); + Query_arena *arena= thd->stmt_arena, backup; + if (arena->is_conventional()) + arena= 0; + else + thd->set_n_backup_active_arena(arena, &backup); + if ((wrapper= new Item_direct_ref_to_ident((Item_ident *)(*conds)))) + (*conds)= (Item*) wrapper; + if (arena) + thd->restore_active_arena(arena, &backup); +} + + /* Fix all conditions and outer join expressions. @@ -8202,6 +8225,12 @@ int setup_conds(THD *thd, TABLE_LIST *tables, TABLE_LIST *leaves, print_where(*conds, "WHERE in setup_conds", QT_ORDINARY);); + /* + Wrap alone field in WHERE clause in case it will be outer field of subquery + which need persistent pointer on it, but conds could be changed by optimizer + */ + if ((*conds)->type() == Item::FIELD_ITEM) + wrap_ident(thd, conds); if ((!(*conds)->fixed && (*conds)->fix_fields(thd, conds)) || (*conds)->check_cols(1)) goto err_no_arena; diff --git a/sql/sql_class.cc b/sql/sql_class.cc index 58e9d55bb10..17fffffa227 100644 --- a/sql/sql_class.cc +++ b/sql/sql_class.cc @@ -2697,6 +2697,7 @@ void Query_arena::free_items() for (; free_list; free_list= next) { next= free_list->next; + DBUG_ASSERT(free_list != next); free_list->delete_self(); } /* Postcondition: free_list is 0 */ @@ -3141,6 +3142,7 @@ void TMP_TABLE_PARAM::init() table_charset= 0; precomputed_group_by= 0; bit_fields_as_long= 0; + materialized_subquery= 0; skip_create_table= 0; DBUG_VOID_RETURN; } diff --git a/sql/sql_class.h b/sql/sql_class.h index 0ed27ae2825..c5b2df30e64 100644 --- a/sql/sql_class.h +++ b/sql/sql_class.h @@ -2731,7 +2731,12 @@ public: class select_result_interceptor: public select_result { public: - select_result_interceptor() {} /* Remove gcc warning */ + select_result_interceptor() + { + DBUG_ENTER("select_result_interceptor::select_result_interceptor"); + DBUG_PRINT("enter", ("this 0x%lx", (ulong) this)); + DBUG_VOID_RETURN; + } /* Remove gcc warning */ uint field_count(List<Item> &fields) const { return 0; } bool send_fields(List<Item> &fields, uint flag) { return FALSE; } }; @@ -2974,6 +2979,8 @@ public: uint convert_blob_length; CHARSET_INFO *table_charset; bool schema_table; + /* TRUE if the temp table is created for subquery materialization. */ + bool materialized_subquery; /* True if GROUP BY and its aggregate functions are already computed by a table access method (e.g. by loose index scan). In this case @@ -2997,8 +3004,8 @@ public: TMP_TABLE_PARAM() :copy_field(0), group_parts(0), group_length(0), group_null_parts(0), convert_blob_length(0), - schema_table(0), precomputed_group_by(0), force_copy_fields(0), - bit_fields_as_long(0), skip_create_table(0) + schema_table(0), materialized_subquery(0), precomputed_group_by(0), + force_copy_fields(0), bit_fields_as_long(0), skip_create_table(0) {} ~TMP_TABLE_PARAM() { @@ -3032,6 +3039,7 @@ public: virtual bool create_result_table(THD *thd, List<Item> *column_types, bool is_distinct, ulonglong options, const char *alias, bool bit_fields_as_long); + TMP_TABLE_PARAM *get_tmp_table_param() { return &tmp_table_param; } }; /* Base subselect interface class */ @@ -3095,7 +3103,7 @@ protected: void reset(); public: - select_materialize_with_stats() {} + select_materialize_with_stats() { tmp_table_param.init(); } virtual bool create_result_table(THD *thd, List<Item> *column_types, bool is_distinct, ulonglong options, const char *alias, bool bit_fields_as_long); diff --git a/sql/sql_delete.cc b/sql/sql_delete.cc index afb45e730a3..5b5565000da 100644 --- a/sql/sql_delete.cc +++ b/sql/sql_delete.cc @@ -93,6 +93,10 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds, } } + /* Apply the IN=>EXISTS transformation to all subqueries and optimize them. */ + if (select_lex->optimize_unflattened_subqueries()) + DBUG_RETURN(TRUE); + const_cond= (!conds || conds->const_item()); safe_update=test(thd->options & OPTION_SAFE_UPDATES); if (safe_update && const_cond) diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc index 3b655bac5af..f1640bf71ed 100644 --- a/sql/sql_lex.cc +++ b/sql/sql_lex.cc @@ -1684,6 +1684,31 @@ void st_select_lex_node::include_down(st_select_lex_node *upper) slave= 0; } + +void st_select_lex_node::add_slave(st_select_lex_node *slave_arg) +{ + for (; slave; slave= slave->next) + if (slave == slave_arg) + return; + + if (slave) + { + st_select_lex_node *slave_arg_slave= slave_arg->slave; + /* Insert in the front of list of slaves if any. */ + slave_arg->include_neighbour(slave); + /* include_neighbour() sets slave_arg->slave=0, restore it. */ + slave_arg->slave= slave_arg_slave; + /* Count on include_neighbour() setting the master. */ + DBUG_ASSERT(slave_arg->master == this); + } + else + { + slave= slave_arg; + slave_arg->master= this; + } +} + + /* include on level down (but do not link) @@ -1735,17 +1760,29 @@ void st_select_lex_node::fast_exclude() } + +/* + Exclude a node from the tree lex structure, but leave it in the global + list of nodes. +*/ + +void st_select_lex_node::exclude_from_tree() +{ + if ((*prev= next)) + next->prev= prev; +} + + /* - excluding select_lex structure (except first (first select can't be + Exclude select_lex structure (except first (first select can't be deleted, because it is most upper select)) */ void st_select_lex_node::exclude() { - //exclude from global list + /* exclude from global list */ fast_exclude(); - //exclude from other structures - if ((*prev= next)) - next->prev= prev; + /* exclude from other structures */ + exclude_from_tree(); /* We do not need following statements, because prev pointer of first list element point to master->slave @@ -1905,18 +1942,19 @@ bool st_select_lex::mark_as_dependent(THD *thd, st_select_lex *last, Item *depen SELECT_LEX *s= this; do { - if (!(s->uncacheable & UNCACHEABLE_DEPENDENT)) + if (!(s->uncacheable & UNCACHEABLE_DEPENDENT_GENERATED)) { // Select is dependent of outer select s->uncacheable= (s->uncacheable & ~UNCACHEABLE_UNITED) | - UNCACHEABLE_DEPENDENT; + UNCACHEABLE_DEPENDENT_GENERATED; SELECT_LEX_UNIT *munit= s->master_unit(); munit->uncacheable= (munit->uncacheable & ~UNCACHEABLE_UNITED) | - UNCACHEABLE_DEPENDENT; + UNCACHEABLE_DEPENDENT_GENERATED; for (SELECT_LEX *sl= munit->first_select(); sl ; sl= sl->next_select()) { if (sl != s && - !(sl->uncacheable & (UNCACHEABLE_DEPENDENT | UNCACHEABLE_UNITED))) + !(sl->uncacheable & (UNCACHEABLE_DEPENDENT_GENERATED | + UNCACHEABLE_UNITED))) sl->uncacheable|= UNCACHEABLE_UNITED; } } @@ -2141,17 +2179,6 @@ void st_select_lex::print_limit(THD *thd, subs_type == Item_subselect::IN_SUBS || subs_type == Item_subselect::ALL_SUBS) { - DBUG_ASSERT(!item->fixed || - /* - If not using materialization both: - select_limit == 1, and there should be no offset_limit. - */ - (((subs_type == Item_subselect::IN_SUBS) && - ((Item_in_subselect*)item)->exec_method == - Item_in_subselect::MATERIALIZATION) ? - TRUE : - (select_limit->val_int() == 1LL) && - offset_limit == 0)); return; } } @@ -3078,6 +3105,71 @@ bool st_select_lex::add_index_hint (THD *thd, char *str, uint length) str, length)); } + +bool st_select_lex::optimize_unflattened_subqueries() +{ + for (SELECT_LEX_UNIT *un= first_inner_unit(); un; un= un->next_unit()) + { + Item_subselect *subquery_predicate= un->item; + if (subquery_predicate) + { + for (SELECT_LEX *sl= un->first_select(); sl; sl= sl->next_select()) + { + JOIN *inner_join= sl->join; + SELECT_LEX *save_select= un->thd->lex->current_select; + ulonglong save_options; + int res; + /* We need only 1 row to determine existence */ + un->set_limit(un->global_parameters); + un->thd->lex->current_select= sl; + save_options= inner_join->select_options; + if (un->outer_select()->options & SELECT_DESCRIBE) + { + /* Optimize the subquery in the context of EXPLAIN. */ + sl->set_explain_type(); + sl->options|= SELECT_DESCRIBE; + inner_join->select_options|= SELECT_DESCRIBE; + } + res= inner_join->optimize(); + inner_join->select_options= save_options; + un->thd->lex->current_select= save_select; + if (res) + return TRUE; + } + } + } + return FALSE; +} + + +/** + Set the EXPLAIN type for this subquery. +*/ + +void st_select_lex::set_explain_type() +{ + SELECT_LEX *first= master_unit()->first_select(); + /* drop UNCACHEABLE_EXPLAIN, because it is for internal usage only */ + uint8 is_uncacheable= (uncacheable & ~UNCACHEABLE_EXPLAIN); + + type= ((&master_unit()->thd->lex->select_lex == this) ? + (first_inner_unit() || next_select() ? + "PRIMARY" : "SIMPLE") : + ((this == first) ? + ((linkage == DERIVED_TABLE_TYPE) ? + "DERIVED" : + ((is_uncacheable & UNCACHEABLE_DEPENDENT) ? + "DEPENDENT SUBQUERY" : + (is_uncacheable ? "UNCACHEABLE SUBQUERY" : + "SUBQUERY"))) : + ((is_uncacheable & UNCACHEABLE_DEPENDENT) ? + "DEPENDENT UNION": + is_uncacheable ? "UNCACHEABLE UNION": + "UNION"))); + options|= SELECT_DESCRIBE; +} + + /** A routine used by the parser to decide whether we are specifying a full partitioning or if only partitions to add or to split. @@ -3095,4 +3187,3 @@ bool st_lex::is_partition_management() const (alter_info.flags == ALTER_ADD_PARTITION || alter_info.flags == ALTER_REORGANIZE_PARTITION)); } - diff --git a/sql/sql_lex.h b/sql/sql_lex.h index b3dccb4b9bd..6fc1167235c 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -417,7 +417,8 @@ public: /* result of this query can't be cached, bit field, can be : - UNCACHEABLE_DEPENDENT + UNCACHEABLE_DEPENDENT_GENERATED + UNCACHEABLE_DEPENDENT_INJECTED UNCACHEABLE_RAND UNCACHEABLE_SIDEEFFECT UNCACHEABLE_EXPLAIN @@ -442,10 +443,12 @@ public: virtual void init_query(); virtual void init_select(); void include_down(st_select_lex_node *upper); + void add_slave(st_select_lex_node *slave_arg); void include_neighbour(st_select_lex_node *before); void include_standalone(st_select_lex_node *sel, st_select_lex_node **ref); void include_global(st_select_lex_node **plink); void exclude(); + void exclude_from_tree(); virtual st_select_lex_unit* master_unit()= 0; virtual st_select_lex* outer_select()= 0; @@ -846,6 +849,15 @@ public: void clear_index_hints(void) { index_hints= NULL; } bool is_part_of_union() { return master_unit()->is_union(); } + /* + Optimize all subqueries that have not been flattened into semi-joins. + This functionality is a method of SELECT_LEX instead of JOIN because + some SQL statements as DELETE do not have a corresponding JOIN object. + */ + bool optimize_unflattened_subqueries(); + /* Set the EXPLAIN type for this subquery. */ + void set_explain_type(); + private: /* current index hint kind. used in filling up index_hints */ enum index_hint_type current_index_hint_type; diff --git a/sql/sql_list.h b/sql/sql_list.h index 2dade14f211..e90f16aeb99 100644 --- a/sql/sql_list.h +++ b/sql/sql_list.h @@ -260,7 +260,7 @@ public: list_node *node= first; list_node *list_first= list->first; elements=0; - while (node && node != list_first) + while (node->info && node != list_first) { prev= &node->next; node= node->next; diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 47c9d372086..103a228ebb6 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -55,21 +55,19 @@ static bool make_join_statistics(JOIN *join, TABLE_LIST *leaves, COND *conds, static bool update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse, JOIN_TAB *join_tab, uint tables, COND *conds, - COND_EQUAL *cond_equal, table_map table_map, SELECT_LEX *select_lex, st_sargable_param **sargables); +static bool sort_and_filter_keyuse(DYNAMIC_ARRAY *keyuse); static int sort_keyuse(KEYUSE *a,KEYUSE *b); static bool create_ref_for_key(JOIN *join, JOIN_TAB *j, KEYUSE *org_keyuse, table_map used_tables); -bool choose_plan(JOIN *join,table_map join_tables); - void best_access_path(JOIN *join, JOIN_TAB *s, table_map remaining_tables, uint idx, bool disable_jbuf, double record_count, POSITION *pos, POSITION *loose_scan_pos); static void optimize_straight_join(JOIN *join, table_map join_tables); static bool greedy_search(JOIN *join, table_map remaining_tables, - uint depth, uint prune_level); + uint depth, uint prune_level); static bool best_extension_by_limited_search(JOIN *join, table_map remaining_tables, uint idx, double record_count, @@ -86,7 +84,6 @@ static int join_tab_cmp_embedded_first(const void *emb, const void* ptr1, const static bool find_best(JOIN *join,table_map rest_tables,uint index, double record_count,double read_time); static uint cache_record_length(JOIN *join,uint index); -static double prev_record_reads(JOIN *join, uint idx, table_map found_ref); static bool get_best_combination(JOIN *join); static store_key *get_store_key(THD *thd, KEYUSE *keyuse, table_map used_tables, @@ -174,13 +171,16 @@ static int join_ft_read_first(JOIN_TAB *tab); static int join_ft_read_next(READ_RECORD *info); int join_read_always_key_or_null(JOIN_TAB *tab); int join_read_next_same_or_null(READ_RECORD *info); -static COND *make_cond_for_table(Item *cond,table_map table, +static COND *make_cond_for_table(THD *thd, Item *cond,table_map table, table_map used_table, + uint join_tab_idx_arg, bool exclude_expensive_cond, bool retain_ref_cond); -static COND *make_cond_for_table_from_pred(Item *root_cond, Item *cond, +static COND *make_cond_for_table_from_pred(THD *thd, Item *root_cond, + Item *cond, table_map tables, table_map used_table, + uint join_tab_idx_arg, bool exclude_expensive_cond, bool retain_ref_cond); @@ -235,8 +235,6 @@ static bool update_sum_func(Item_sum **func); static void select_describe(JOIN *join, bool need_tmp_table,bool need_order, bool distinct, const char *message=NullS); 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); @@ -584,6 +582,13 @@ JOIN::prepare(Item ***rref_pointer_array, thd->where="having clause"; thd->lex->allow_sum_func|= 1 << select_lex_arg->nest_level; select_lex->having_fix_field= 1; + /* + Wrap alone field in HAVING clause in case it will be outer field of subquery + which need persistent pointer on it, but having could be changed by optimizer + */ + if (having->type() == Item::REF_ITEM && + ((Item_ref *)having)->ref_type() == Item_ref::REF) + wrap_ident(thd, &having); bool having_fix_rc= (!having->fixed && (having->fix_fields(thd, &having) || having->check_cols(1))); @@ -735,11 +740,36 @@ JOIN::prepare(Item ***rref_pointer_array, if (!procedure && result && result->prepare(fields_list, unit_arg)) goto err; /* purecov: inspected */ + unit= unit_arg; + if (prepare_stage2()) + goto err; + + DBUG_RETURN(0); // All OK + +err: + delete procedure; /* purecov: inspected */ + procedure= 0; + DBUG_RETURN(-1); /* purecov: inspected */ +} + + +/** + Second phase of prepare where we collect some statistic. + + @details + We made this part separate to be able recalculate some statistic after + transforming subquery on optimization phase. +*/ + +bool JOIN::prepare_stage2() +{ + bool res= TRUE; + DBUG_ENTER("JOIN::prepare_stage2"); + /* Init join struct */ count_field_types(select_lex, &tmp_table_param, all_fields, 0); ref_pointer_array_size= all_fields.elements*sizeof(Item*); this->group= group_list != 0; - unit= unit_arg; if (tmp_table_param.sum_func_count && !group_list) implicit_grouping= TRUE; @@ -756,12 +786,9 @@ JOIN::prepare(Item ***rref_pointer_array, if (alloc_func_list()) goto err; - DBUG_RETURN(0); // All OK - + res= FALSE; err: - delete procedure; /* purecov: inspected */ - procedure= 0; - DBUG_RETURN(-1); /* purecov: inspected */ + DBUG_RETURN(res); /* purecov: inspected */ } @@ -794,7 +821,8 @@ JOIN::optimize() set_allowed_join_cache_types(); /* dump_TABLE_LIST_graph(select_lex, select_lex->leaf_tables); */ - if (convert_join_subqueries_to_semijoins(this)) + if (transform_max_min_subquery() || + convert_join_subqueries_to_semijoins(this)) DBUG_RETURN(1); /* purecov: inspected */ /* dump_TABLE_LIST_graph(select_lex, select_lex->leaf_tables); */ @@ -886,6 +914,7 @@ JOIN::optimize() "Impossible HAVING" : "Impossible WHERE"; tables= 0; error= 0; + choose_tableless_subquery_plan(); goto setup_subq_exit; } } @@ -930,12 +959,13 @@ JOIN::optimize() */ if ((res=opt_sum_query(thd, select_lex->leaf_tables, all_fields, conds))) { - if (res == HA_ERR_KEY_NOT_FOUND) + if (res == HA_ERR_KEY_NOT_FOUND || res < 0) { DBUG_PRINT("info",("No matching min/max row")); zero_result_cause= "No matching min/max row"; tables= 0; error=0; + choose_tableless_subquery_plan(); goto setup_subq_exit; } if (res > 1) @@ -944,14 +974,7 @@ JOIN::optimize() DBUG_PRINT("error",("Error from opt_sum_query")); DBUG_RETURN(1); } - if (res < 0) - { - DBUG_PRINT("info",("No matching min/max row")); - zero_result_cause= "No matching min/max row"; - tables= 0; - error=0; - goto setup_subq_exit; - } + DBUG_PRINT("info",("Select tables optimized away")); zero_result_cause= "Select tables optimized away"; tables_list= 0; // All tables resolved @@ -969,24 +992,22 @@ JOIN::optimize() if (conds && !(thd->lex->describe & DESCRIBE_EXTENDED)) { COND *table_independent_conds= - make_cond_for_table(conds, PSEUDO_TABLE_BITS, 0, FALSE, FALSE); + make_cond_for_table(thd, conds, PSEUDO_TABLE_BITS, 0, MAX_TABLES, + FALSE, FALSE); DBUG_EXECUTE("where", print_where(table_independent_conds, "where after opt_sum_query()", QT_ORDINARY);); conds= table_independent_conds; } - goto setup_subq_exit; } } if (!tables_list) { DBUG_PRINT("info",("No tables")); error= 0; - /* Create all structures needed for materialized subquery execution. */ - if (setup_subquery_materialization()) - DBUG_RETURN(1); - DBUG_RETURN(0); + choose_tableless_subquery_plan(); + goto setup_subq_exit; } error= -1; // Error is sent to client sort_by_table= get_sort_by_table(order, group_list, select_lex->leaf_tables); @@ -1378,8 +1399,7 @@ JOIN::optimize() if (!(select_options & SELECT_DESCRIBE)) init_ftfuncs(thd, select_lex, test(order)); - /* Create all structures needed for materialized subquery execution. */ - if (setup_subquery_materialization()) + if (optimize_unflattened_subqueries()) DBUG_RETURN(1); int res; @@ -1483,6 +1503,34 @@ JOIN::optimize() if (join_tab->is_using_loose_index_scan()) tmp_table_param.precomputed_group_by= TRUE; + error= 0; + DBUG_RETURN(0); + +setup_subq_exit: + /* + Even with zero matching rows, subqueries in the HAVING clause may + need to be evaluated if there are aggregate functions in the query. + */ + if (optimize_unflattened_subqueries()) + DBUG_RETURN(1); + error= 0; + DBUG_RETURN(0); +} + + +/** + Create and initialize objects neeed for the execution of a query plan. + Evaluate constant expressions not evaluated during optimization. +*/ + +int JOIN::init_execution() +{ + DBUG_ENTER("JOIN::init_execution"); + + DBUG_ASSERT(optimized); + DBUG_ASSERT(!(select_options & SELECT_DESCRIBE)); + initialized= true; + /* Create a tmp table if distinct or if the sort is too complicated */ if (need_tmp) { @@ -1515,7 +1563,7 @@ JOIN::optimize() select_options, tmp_rows_limit, (char *) ""))) - { + { DBUG_RETURN(1); } @@ -1601,19 +1649,6 @@ JOIN::optimize() DBUG_RETURN(-1); /* purecov: inspected */ } - error= 0; - DBUG_RETURN(0); - -setup_subq_exit: - /* - Even with zero matching rows, subqueries in the HAVING clause may - need to be evaluated if there are aggregate functions in the - query. If we have planned to materialize the subquery, we need to - set it up properly before prematurely leaving optimize(). - */ - if (setup_subquery_materialization()) - DBUG_RETURN(1); - error= 0; DBUG_RETURN(0); } @@ -1962,6 +1997,16 @@ JOIN::exec() if (tables) thd->limit_found_rows= 0; + /* + Evaluate expensive constant conditions that were not evaluated during + optimization. Do not evaluate them for EXPLAIN statements as these + condtions may be arbitrarily costly, and because the optimize phase + might not have produced a complete executable plan for EXPLAINs. + */ + if (exec_const_cond && !(select_options & SELECT_DESCRIBE) && + !exec_const_cond->val_int()) + zero_result_cause= "Impossible WHERE noticed after reading const tables"; + if (zero_result_cause) { (void) return_zero_rows(this, result, select_lex->leaf_tables, @@ -1969,10 +2014,31 @@ JOIN::exec() send_row_on_empty_set(), select_options, zero_result_cause, - having); + having ? having : tmp_having); DBUG_VOID_RETURN; } + /* + Evaluate all constant expressions with subqueries in the ORDER/GROUP clauses + to make sure that all subqueries return a single row. The evaluation itself + will trigger an error if that is not the case. + */ + if (exec_const_order_group_cond.elements && + !(select_options & SELECT_DESCRIBE)) + { + List_iterator_fast<Item> const_item_it(exec_const_order_group_cond); + Item *cur_const_item; + while ((cur_const_item= const_item_it++)) + { + cur_const_item->val_str(&cur_const_item->str_value); + if (thd->is_error()) + { + error= thd->is_error(); + DBUG_VOID_RETURN; + } + } + } + if ((this->select_lex->options & OPTION_SCHEMA_TABLE) && get_schema_tables_result(this, PROCESSED_BY_JOIN_EXEC)) DBUG_VOID_RETURN; @@ -2011,6 +2077,9 @@ JOIN::exec() DBUG_VOID_RETURN; } + if (!initialized && init_execution()) + DBUG_VOID_RETURN; + JOIN *curr_join= this; List<Item> *curr_all_fields= &all_fields; List<Item> *curr_fields_list= &fields_list; @@ -2345,9 +2414,10 @@ JOIN::exec() table_map used_tables= (curr_join->const_table_map | curr_table->table->map); - Item* sort_table_cond= make_cond_for_table(curr_join->tmp_having, + Item* sort_table_cond= make_cond_for_table(thd, curr_join->tmp_having, used_tables, - (table_map)0, FALSE, FALSE); + (table_map)0, MAX_TABLES, + FALSE, FALSE); if (sort_table_cond) { if (!curr_table->select) @@ -2383,9 +2453,10 @@ JOIN::exec() DBUG_EXECUTE("where",print_where(curr_table->select->cond, "select and having", QT_ORDINARY);); - curr_join->tmp_having= make_cond_for_table(curr_join->tmp_having, + curr_join->tmp_having= make_cond_for_table(thd, curr_join->tmp_having, ~ (table_map) 0, - ~used_tables, FALSE, FALSE); + ~used_tables, MAX_TABLES, + FALSE, FALSE); DBUG_EXECUTE("where",print_where(curr_join->tmp_having, "having after sort", QT_ORDINARY);); @@ -2735,51 +2806,6 @@ err: } -/** - Setup for execution all subqueries of a query, for which the optimizer - chose hash semi-join. - - @details Iterate over all subqueries of the query, and if they are under an - IN predicate, and the optimizer chose to compute it via hash semi-join: - - try to initialize all data structures needed for the materialized execution - of the IN predicate, - - if this fails, then perform the IN=>EXISTS transformation which was - previously blocked during JOIN::prepare. - - This method is part of the "code generation" query processing phase. - - This phase must be called after substitute_for_best_equal_field() because - that function may replace items with other items from a multiple equality, - and we need to reference the correct items in the index access method of the - IN predicate. - - @return Operation status - @retval FALSE success. - @retval TRUE error occurred. -*/ - -bool JOIN::setup_subquery_materialization() -{ - for (SELECT_LEX_UNIT *un= select_lex->first_inner_unit(); un; - un= un->next_unit()) - { - for (SELECT_LEX *sl= un->first_select(); sl; sl= sl->next_select()) - { - Item_subselect *subquery_predicate= sl->master_unit()->item; - if (subquery_predicate && - subquery_predicate->substype() == Item_subselect::IN_SUBS) - { - Item_in_subselect *in_subs= (Item_in_subselect*) subquery_predicate; - if (in_subs->exec_method == Item_in_subselect::MATERIALIZATION && - in_subs->setup_engine()) - return TRUE; - } - } - } - return FALSE; -} - - /***************************************************************************** Create JOIN_TABS, make a guess about the table types, Approximate how many records will be used in each table @@ -3005,10 +3031,14 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, } if (conds || outer_join) + { if (update_ref_and_keys(join->thd, keyuse_array, stat, join->tables, - conds, join->cond_equal, - ~outer_join, join->select_lex, &sargables)) + conds, ~outer_join, join->select_lex, &sargables)) + goto error; + if (keyuse_array->elements && sort_and_filter_keyuse(keyuse_array)) goto error; + DBUG_EXECUTE("opt", print_keyuse_array(keyuse_array);); + } join->const_table_map= no_rows_const_tables; join->const_tables= const_count; @@ -3315,8 +3345,12 @@ make_join_statistics(JOIN *join, TABLE_LIST *tables_arg, COND *conds, { memcpy((uchar*) join->best_positions,(uchar*) join->positions, sizeof(POSITION)*join->const_tables); + join->record_count= 1.0; join->best_read=1.0; } + if (join->choose_subquery_plan(all_table_map & ~join->const_table_map)) + goto error; + /* Generate an execution plan from the found optimal join order. */ DBUG_RETURN(join->thd->killed || get_best_combination(join)); @@ -4356,11 +4390,10 @@ static void add_key_fields_for_nj(JOIN *join, TABLE_LIST *nested_join_table, static bool update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse,JOIN_TAB *join_tab, - uint tables, COND *cond, COND_EQUAL *cond_equal, - table_map normal_tables, SELECT_LEX *select_lex, - SARGABLE_PARAM **sargables) + uint tables, COND *cond, table_map normal_tables, + SELECT_LEX *select_lex, SARGABLE_PARAM **sargables) { - uint and_level,i,found_eq_constant; + uint and_level,i; KEY_FIELD *key_fields, *end, *field; uint sz; uint m= max(select_lex->max_equal_elems,1); @@ -4456,73 +4489,81 @@ update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse,JOIN_TAB *join_tab, return TRUE; } - /* - Sort the array of possible keys and remove the following key parts: - - ref if there is a keypart which is a ref and a const. - (e.g. if there is a key(a,b) and the clause is a=3 and b=7 and b=t2.d, - then we skip the key part corresponding to b=t2.d) - - keyparts without previous keyparts - (e.g. if there is a key(a,b,c) but only b < 5 (or a=2 and c < 3) is - used in the query, we drop the partial key parts from consideration). - Special treatment for ft-keys. - */ - if (keyuse->elements) - { - KEYUSE key_end,*prev,*save_pos,*use; + return FALSE; +} - my_qsort(keyuse->buffer,keyuse->elements,sizeof(KEYUSE), - (qsort_cmp) sort_keyuse); - bzero((char*) &key_end,sizeof(key_end)); /* Add for easy testing */ - if (insert_dynamic(keyuse,(uchar*) &key_end)) - return TRUE; +/** + Sort the array of possible keys and remove the following key parts: + - ref if there is a keypart which is a ref and a const. + (e.g. if there is a key(a,b) and the clause is a=3 and b=7 and b=t2.d, + then we skip the key part corresponding to b=t2.d) + - keyparts without previous keyparts + (e.g. if there is a key(a,b,c) but only b < 5 (or a=2 and c < 3) is + used in the query, we drop the partial key parts from consideration). + Special treatment for ft-keys. +*/ + +static bool sort_and_filter_keyuse(DYNAMIC_ARRAY *keyuse) +{ + KEYUSE key_end, *prev, *save_pos, *use; + uint found_eq_constant, i; + + DBUG_ASSERT(keyuse->elements); - use=save_pos=dynamic_element(keyuse,0,KEYUSE*); - prev= &key_end; - found_eq_constant=0; - for (i=0 ; i < keyuse->elements-1 ; i++,use++) + my_qsort(keyuse->buffer, keyuse->elements, sizeof(KEYUSE), + (qsort_cmp) sort_keyuse); + + bzero((char*) &key_end, sizeof(key_end)); /* Add for easy testing */ + if (insert_dynamic(keyuse, (uchar*) &key_end)) + return TRUE; + + use= save_pos= dynamic_element(keyuse,0,KEYUSE*); + prev= &key_end; + found_eq_constant= 0; + for (i=0 ; i < keyuse->elements-1 ; i++,use++) + { + if (!use->is_for_hash_join()) { - if (!use->is_for_hash_join()) + if (!use->used_tables && use->optimize != KEY_OPTIMIZE_REF_OR_NULL) + use->table->const_key_parts[use->key]|= use->keypart_map; + if (use->keypart != FT_KEYPART) { - if (!use->used_tables && use->optimize != KEY_OPTIMIZE_REF_OR_NULL) - use->table->const_key_parts[use->key]|= use->keypart_map; - if (use->keypart != FT_KEYPART) + if (use->key == prev->key && use->table == prev->table) { - if (use->key == prev->key && use->table == prev->table) - { - if (prev->keypart+1 < use->keypart || - (prev->keypart == use->keypart && found_eq_constant)) - continue; /* remove */ - } - else if (use->keypart != 0) // First found must be 0 - continue; + if (prev->keypart+1 < use->keypart || + (prev->keypart == use->keypart && found_eq_constant)) + continue; /* remove */ } - - prev= use; - found_eq_constant= !use->used_tables; - use->table->reginfo.join_tab->checked_keys.set_bit(use->key); + else if (use->keypart != 0) // First found must be 0 + continue; } - /* - Old gcc used a memcpy(), which is undefined if save_pos==use: - http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19410 - http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39480 - This also disables a valgrind warning, so better to have the test. - */ - if (save_pos != use) - *save_pos= *use; - /* Save ptr to first use */ - if (!use->table->reginfo.join_tab->keyuse) - use->table->reginfo.join_tab->keyuse= save_pos; - save_pos++; - } - i=(uint) (save_pos-(KEYUSE*) keyuse->buffer); - VOID(set_dynamic(keyuse,(uchar*) &key_end,i)); - keyuse->elements=i; - } - DBUG_EXECUTE("opt", print_keyuse_array(keyuse);); + + prev= use; + found_eq_constant= !use->used_tables; + use->table->reginfo.join_tab->checked_keys.set_bit(use->key); + } + /* + Old gcc used a memcpy(), which is undefined if save_pos==use: + http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19410 + http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39480 + This also disables a valgrind warning, so better to have the test. + */ + if (save_pos != use) + *save_pos= *use; + /* Save ptr to first use */ + if (!use->table->reginfo.join_tab->keyuse) + use->table->reginfo.join_tab->keyuse= save_pos; + save_pos++; + } + i= (uint) (save_pos-(KEYUSE*) keyuse->buffer); + VOID(set_dynamic(keyuse,(uchar*) &key_end,i)); + keyuse->elements= i; + return FALSE; } + /** Update some values in keyuse for faster choose_plan() loop. */ @@ -4812,8 +4853,8 @@ best_access_path(JOIN *join, if (!(keyuse->used_tables & ~join->const_table_map)) const_part|= keyuse->keypart_map; - double tmp2= prev_record_reads(join, idx, (found_ref | - keyuse->used_tables)); + double tmp2= prev_record_reads(join->positions, idx, + (found_ref | keyuse->used_tables)); if (tmp2 < best_prev_record_reads) { best_part_found_ref= keyuse->used_tables & ~join->const_table_map; @@ -4853,7 +4894,7 @@ best_access_path(JOIN *join, Really, there should be records=0.0 (yes!) but 1.0 would be probably safer */ - tmp= prev_record_reads(join, idx, found_ref); + tmp= prev_record_reads(join->positions, idx, found_ref); records= 1.0; } else @@ -4868,7 +4909,7 @@ best_access_path(JOIN *join, max_key_part= (uint) ~0; if ((keyinfo->flags & (HA_NOSAME | HA_NULL_PART_KEY)) == HA_NOSAME) { - tmp = prev_record_reads(join, idx, found_ref); + tmp = prev_record_reads(join->positions, idx, found_ref); records=1.0; } else @@ -5600,6 +5641,7 @@ optimize_straight_join(JOIN *join, table_map join_tables) read_time+= record_count; // We have to make a temp table memcpy((uchar*) join->best_positions, (uchar*) join->positions, sizeof(POSITION)*idx); + join->record_count= record_count; join->best_read= read_time; } @@ -5781,40 +5823,45 @@ greedy_search(JOIN *join, } -/* - Calculate a cost of given partial join order +/** + Calculate a cost of given partial join order in join->positions. - SYNOPSIS - get_partial_join_cost() - join IN Join to use. join->positions holds the - partial join order - idx IN # tables in the partial join order - read_time_arg OUT Store read time here - record_count_arg OUT Store record count here + @param n_tables[in] # tables in the partial join order after the last + constant table + @param read_time_arg[out] store read time here + @param record_count_arg[out] store record count here - DESCRIPTION - - This is needed for semi-join materialization code. The idea is that - we detect sj-materialization after we've put all sj-inner tables into - the join prefix + @note + When used by semi-join materialization code the idea is that we + detect sj-materialization after we've put all sj-inner tables into + the join prefix. prefix-tables semi-join-inner-tables tN ^--we're here and we'll need to get the cost of prefix-tables prefix again. + + When used with non-flattened subqueries, the method computes the + total cost of query plan. + + @returns + read_time_arg and record_count_arg contain the computed cost. */ -void get_partial_join_cost(JOIN *join, uint n_tables, double *read_time_arg, - double *record_count_arg) +void JOIN::get_partial_join_cost(uint n_tables, + double *read_time_arg, double *record_count_arg) { double record_count= 1; double read_time= 0.0; - for (uint i= join->const_tables; i < n_tables + join->const_tables ; i++) + + DBUG_ASSERT(n_tables <= tables); + + for (uint i= const_tables; i < n_tables; i++) { - if (join->best_positions[i].records_read) + if (best_positions[i].records_read) { - record_count *= join->best_positions[i].records_read; - read_time += join->best_positions[i].read_time; + record_count *= best_positions[i].records_read; + read_time += best_positions[i].read_time; } } *read_time_arg= read_time;// + record_count / TIME_FOR_COMPARE; @@ -5822,8 +5869,6 @@ void get_partial_join_cost(JOIN *join, uint n_tables, double *read_time_arg, } - - /** Find a good, possibly optimal, query execution plan (QEP) by a possibly exhaustive search. @@ -6080,6 +6125,7 @@ best_extension_by_limited_search(JOIN *join, { memcpy((uchar*) join->best_positions, (uchar*) join->positions, sizeof(POSITION) * (idx + 1)); + join->record_count= current_record_count; join->best_read= current_read_time - 0.001; } DBUG_EXECUTE("opt", print_plan(join, idx+1, @@ -6268,8 +6314,9 @@ int JOIN_TAB::make_scan_filter() *get_first_inner_table()->on_expr_ref : join->conds; if (cond && - (tmp=make_cond_for_table(cond, join->const_table_map | table->map, - table->map, FALSE, TRUE))) + (tmp= make_cond_for_table(join->thd, cond, + join->const_table_map | table->map, + table->map, MAX_TABLES, FALSE, TRUE))) { DBUG_EXECUTE("where",print_where(tmp,"cache", QT_ORDINARY);); if (!(cache_select= @@ -6381,12 +6428,12 @@ cache_record_length(JOIN *join,uint idx) Expected number of row combinations */ -static double -prev_record_reads(JOIN *join, uint idx, table_map found_ref) +double +prev_record_reads(POSITION *positions, uint idx, table_map found_ref) { double found=1.0; - POSITION *pos_end= join->positions - 1; - for (POSITION *pos= join->positions + idx - 1; pos != pos_end; pos--) + POSITION *pos_end= positions - 1; + for (POSITION *pos= positions + idx - 1; pos != pos_end; pos--) { if (pos->table->table->map & found_ref) { @@ -6888,7 +6935,7 @@ JOIN::make_simple_join(JOIN *parent, TABLE *temp_table) } -inline void add_cond_and_fix(Item **e1, Item *e2) +inline void add_cond_and_fix(THD *thd, Item **e1, Item *e2) { if (*e1) { @@ -6898,7 +6945,7 @@ inline void add_cond_and_fix(Item **e1, Item *e2) if ((res= new Item_cond_and(*e1, e2))) { *e1= res; - res->quick_fix_field(); + res->fix_fields(thd, 0); res->update_used_tables(); } } @@ -7002,14 +7049,14 @@ static void add_not_null_conds(JOIN *join) COND *new_cond= referred_tab->join == join ? referred_tab->select_cond : join->outer_ref_cond; - add_cond_and_fix(&new_cond, notnull); + add_cond_and_fix(join->thd, &new_cond, notnull); if (referred_tab->join == join) referred_tab->set_select_cond(new_cond, __LINE__); else join->outer_ref_cond= new_cond; } else - add_cond_and_fix(tab->first_inner->on_expr_ref, notnull); + add_cond_and_fix(join->thd, tab->first_inner->on_expr_ref, notnull); } } } @@ -7185,24 +7232,27 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) there inside the triggers. */ { // Check const tables - COND *const_cond= - make_cond_for_table(cond, + join->exec_const_cond= + make_cond_for_table(thd, cond, join->const_table_map, - (table_map) 0, TRUE, FALSE); + (table_map) 0, MAX_TABLES, FALSE, FALSE); /* Add conditions added by add_not_null_conds(). */ for (uint i= 0 ; i < join->const_tables ; i++) - add_cond_and_fix(&const_cond, join->join_tab[i].select_cond); + add_cond_and_fix(thd, &join->exec_const_cond, + join->join_tab[i].select_cond); - DBUG_EXECUTE("where",print_where(const_cond,"constants", QT_ORDINARY);); + DBUG_EXECUTE("where",print_where(join->exec_const_cond,"constants", + QT_ORDINARY);); for (JOIN_TAB *tab= join->join_tab+join->const_tables; tab < join->join_tab+join->tables ; tab++) { if (*tab->on_expr_ref) { JOIN_TAB *cond_tab= tab->first_inner; - COND *tmp= make_cond_for_table(*tab->on_expr_ref, + COND *tmp= make_cond_for_table(thd, *tab->on_expr_ref, join->const_table_map, - (table_map) 0, FALSE, FALSE); + (table_map) 0, MAX_TABLES, + FALSE, FALSE); if (!tmp) continue; tmp= new Item_func_trig_cond(tmp, &cond_tab->not_null_compl); @@ -7218,19 +7268,22 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) cond_tab->select_cond->quick_fix_field(); } } - if (const_cond && !const_cond->val_int()) + + if (join->exec_const_cond && !join->exec_const_cond->is_expensive() && + !join->exec_const_cond->val_int()) { - DBUG_PRINT("info",("Found impossible WHERE condition")); - DBUG_RETURN(1); // Impossible const condition + DBUG_PRINT("info",("Found impossible WHERE condition")); + join->exec_const_cond= NULL; + DBUG_RETURN(1); // Impossible const condition } - COND *outer_ref_cond= make_cond_for_table(cond, + COND *outer_ref_cond= make_cond_for_table(thd, cond, OUTER_REF_TABLE_BIT, OUTER_REF_TABLE_BIT, - FALSE, FALSE); + MAX_TABLES, FALSE, FALSE); if (outer_ref_cond) { - add_cond_and_fix(&outer_ref_cond, join->outer_ref_cond); + add_cond_and_fix(thd, &outer_ref_cond, join->outer_ref_cond); join->outer_ref_cond= outer_ref_cond; } } @@ -7302,10 +7355,11 @@ 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); + tmp= make_cond_for_table(thd, cond, used_tables, current_map, i, + FALSE, FALSE); /* Add conditions added by add_not_null_conds(). */ if (tab->select_cond) - add_cond_and_fix(&tmp, tab->select_cond); + add_cond_and_fix(thd, &tmp, tab->select_cond); is_hj= (tab->type == JT_REF || tab->type == JT_EQ_REF) && (join->allowed_join_cache_types & JOIN_CACHE_HASHED_BIT) && @@ -7373,7 +7427,8 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) if (thd->variables.engine_condition_pushdown && !first_inner_tab) { COND *push_cond= - make_cond_for_table(tmp, current_map, current_map, FALSE, FALSE); + make_cond_for_table(thd, tmp, current_map, current_map, + MAX_TABLES, FALSE, FALSE); if (push_cond) { /* Push condition to handler */ @@ -7524,9 +7579,9 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) if (*join_tab->on_expr_ref) { JOIN_TAB *cond_tab= join_tab->first_inner; - COND *tmp= make_cond_for_table(*join_tab->on_expr_ref, + COND *tmp= make_cond_for_table(thd, *join_tab->on_expr_ref, join->const_table_map, - (table_map) 0, FALSE, FALSE); + (table_map) 0, MAX_TABLES, FALSE, FALSE); if (!tmp) continue; tmp= new Item_func_trig_cond(tmp, &cond_tab->not_null_compl); @@ -7545,6 +7600,7 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond) } /* Push down non-constant conditions from on expressions */ + JOIN_TAB *first_tab= join->join_tab+join->const_tables; JOIN_TAB *last_tab= tab; while (first_inner_tab && first_inner_tab->last_inner == last_tab) { @@ -7556,14 +7612,15 @@ 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 (tab= first_tab; tab <= last_tab ; tab++) { current_map= tab->table->map; used_tables2|= current_map; - COND *tmp_cond= make_cond_for_table(on_expr, used_tables2, - current_map, FALSE, FALSE); + COND *tmp_cond= make_cond_for_table(thd, on_expr, used_tables2, + current_map, (tab - first_tab), + FALSE, FALSE); if (tab == first_inner_tab && tab->on_precond) - add_cond_and_fix(&tmp_cond, tab->on_precond); + add_cond_and_fix(thd, &tmp_cond, tab->on_precond); if (tmp_cond) { JOIN_TAB *cond_tab= tab < first_inner_tab ? first_inner_tab : tab; @@ -8604,6 +8661,10 @@ bool error_if_full_join(JOIN *join) void JOIN_TAB::cleanup() { + DBUG_ENTER("JOIN_TAB::cleanup"); + DBUG_PRINT("enter", ("table %s.%s", + (table ? table->s->db.str : "?"), + (table ? table->s->table_name.str : "?"))); delete select; select= 0; delete quick; @@ -8625,6 +8686,7 @@ void JOIN_TAB::cleanup() table->reginfo.join_tab= 0; } end_read_record(&read_record); + DBUG_VOID_RETURN; } @@ -8745,7 +8807,8 @@ void JOIN::join_free() Optimization: if not EXPLAIN and we are done with the JOIN, free all tables. */ - bool full= (!select_lex->uncacheable && !thd->lex->describe); + bool full= (!(select_lex->uncacheable) && + !thd->lex->describe); bool can_unlock= full; DBUG_ENTER("JOIN::join_free"); @@ -8809,6 +8872,7 @@ void JOIN::join_free() void JOIN::cleanup(bool full) { DBUG_ENTER("JOIN::cleanup"); + DBUG_PRINT("enter", ("full %u", (uint) full)); if (table) { @@ -8834,7 +8898,11 @@ void JOIN::cleanup(bool full) for (tab= join_tab, end= tab+tables; tab != end; tab++) { if (tab->table) + { + DBUG_PRINT("info", ("close index: %s.%s", tab->table->s->db.str, + tab->table->s->table_name.str)); tab->table->file->ha_index_or_rnd_end(); + } } } } @@ -9075,11 +9143,16 @@ remove_const(JOIN *join,ORDER *first_order, COND *cond, *simple_order=0; // Must do a temp table to sort else if (!(order_tables & not_const_tables)) { - if (order->item[0]->with_subselect && - !(join->select_lex->options & SELECT_DESCRIBE)) - order->item[0]->val_str(&order->item[0]->str_value); + if (order->item[0]->with_subselect) + { + /* + Delay the evaluation of constant ORDER and/or GROUP expressions that + contain subqueries until the execution phase. + */ + join->exec_const_order_group_cond.push_back(order->item[0]); + } DBUG_PRINT("info",("removing: %s", order->item[0]->full_name())); - continue; // skip const item + continue; } else { @@ -10199,8 +10272,16 @@ Item *eliminate_item_equal(COND *cond, COND_EQUAL *upper_levels, { if (eq_item) eq_list.push_back(eq_item); + + /* + If we're inside an SJM-nest (current_sjm!=NULL), and the multi-equality + doesn't include a constant, we should produce equality with the first + of the equals in this SJM. - Item *head_item= current_sjm? current_sjm_head: head; + In other cases, get the "head" item, which is either first of the + equals on top level, or the constant. + */ + Item *head_item= (!item_const && current_sjm)? current_sjm_head: head; Item *head_real_item= head_item->real_item(); if (head_real_item->type() == Item::FIELD_ITEM) head_item= head_real_item; @@ -11446,7 +11527,7 @@ remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value) } } } - if (cond->const_item()) + if (cond->const_item() && !cond->is_expensive()) { *cond_value= eval_const_cond(cond) ? Item::COND_TRUE : Item::COND_FALSE; return (COND*) 0; @@ -12282,10 +12363,30 @@ create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields, { if (thd->is_fatal_error) goto err; // Got OOM - continue; // Some kindf of const item + continue; // Some kind of const item } if (type == Item::SUM_FUNC_ITEM) - ((Item_sum *) item)->result_field= new_field; + { + Item_sum *agg_item= (Item_sum *) item; + /* + Update the result field only if it has never been set, or if the + created temporary table is not to be used for subquery + materialization. + + The reason is that for subqueries that require materialization as part + of their plan, we create the 'external' temporary table needed for IN + execution, after the 'internal' temporary table needed for grouping. + Since both the external and the internal temporary tables are created + for the same list of SELECT fields of the subquery, setting + 'result_field' for each invocation of create_tmp_table overrides the + previous value of 'result_field'. + + The condition below prevents the creation of the external temp table + to override the 'result_field' that was set for the internal temp table. + */ + if (!agg_item->result_field || !param->materialized_subquery) + agg_item->result_field= new_field; + } tmp_from_field++; reclength+=new_field->pack_length(); if (!(new_field->flags & NOT_NULL_FLAG)) @@ -15513,7 +15614,13 @@ bool test_if_ref(Item *root_cond, Item_field *left_item,Item *right_item) @param tables Tables for which "current field values" are available @param used_table Table that we're extracting the condition for (may also include PSEUDO_TABLE_BITS, and may be zero) - @param exclude_expensive_cond Do not push expensive conditions + @param join_tab_idx_arg + The index of the JOIN_TAB this Item is being extracted + for. MAX_TABLES if there is no corresponding JOIN_TAB. + @param exclude_expensive_cond + Do not push expensive conditions + @param retain_ref_cond + Retain ref conditions @retval <>NULL Generated condition @retval =NULL Already checked, OR error @@ -15544,34 +15651,29 @@ bool test_if_ref(Item *root_cond, Item_field *left_item,Item *right_item) */ static Item * -make_cond_for_table(Item *cond, table_map tables, table_map used_table, - bool exclude_expensive_cond, bool retain_ref_cond) +make_cond_for_table(THD *thd, Item *cond, table_map tables, + table_map used_table, + uint join_tab_idx_arg, + bool exclude_expensive_cond __attribute__((unused)), + bool retain_ref_cond) { - return make_cond_for_table_from_pred(cond, cond, tables, used_table, + return make_cond_for_table_from_pred(thd, cond, cond, tables, used_table, + join_tab_idx_arg, exclude_expensive_cond, retain_ref_cond); } - + + static Item * -make_cond_for_table_from_pred(Item *root_cond, Item *cond, +make_cond_for_table_from_pred(THD *thd, Item *root_cond, Item *cond, table_map tables, table_map used_table, - bool exclude_expensive_cond, + uint join_tab_idx_arg, + bool exclude_expensive_cond __attribute__ + ((unused)), bool retain_ref_cond) { - if (used_table && !(cond->used_tables() & used_table) && - /* - Exclude constant conditions not checked at optimization time if - the table we are pushing conditions to is the first one. - As a result, such conditions are not considered as already checked - and will be checked at execution time, attached to the first table. - - psergey: TODO: "used_table & 1" doesn't make sense in nearly any - context. Look at setup_table_map(), table bits reflect the order - the tables were encountered by the parser. Check what we should - replace this condition with. - */ - !((used_table & 1) && cond->is_expensive())) + if (used_table && !(cond->used_tables() & used_table)) return (COND*) 0; // Already checked if (cond->type() == Item::COND_ITEM) { @@ -15585,8 +15687,9 @@ make_cond_for_table_from_pred(Item *root_cond, Item *cond, Item *item; while ((item=li++)) { - Item *fix=make_cond_for_table_from_pred(root_cond, item, + Item *fix=make_cond_for_table_from_pred(thd, root_cond, item, tables, used_table, + join_tab_idx_arg, exclude_expensive_cond, retain_ref_cond); if (fix) @@ -15599,10 +15702,11 @@ make_cond_for_table_from_pred(Item *root_cond, Item *cond, return new_cond->argument_list()->head(); default: /* - Item_cond_and do not need fix_fields for execution, its parameters - are fixed or do not need fix_fields, too + Call fix_fields to propagate all properties of the children to + the new parent Item. This should not be expensive because all + children of Item_cond_and should be fixed by now. */ - new_cond->quick_fix_field(); + new_cond->fix_fields(thd, 0); new_cond->used_tables_cache= ((Item_cond_and*) cond)->used_tables_cache & tables; @@ -15618,8 +15722,9 @@ make_cond_for_table_from_pred(Item *root_cond, Item *cond, Item *item; while ((item=li++)) { - Item *fix=make_cond_for_table_from_pred(root_cond, item, + Item *fix=make_cond_for_table_from_pred(thd, root_cond, item, tables, 0L, + join_tab_idx_arg, exclude_expensive_cond, retain_ref_cond); if (!fix) @@ -15627,10 +15732,11 @@ make_cond_for_table_from_pred(Item *root_cond, Item *cond, new_cond->argument_list()->push_back(fix); } /* - Item_cond_and do not need fix_fields for execution, its parameters - are fixed or do not need fix_fields, too + Call fix_fields to propagate all properties of the children to + the new parent Item. This should not be expensive because all + children of Item_cond_and should be fixed by now. */ - new_cond->quick_fix_field(); + new_cond->fix_fields(thd, 0); new_cond->used_tables_cache= ((Item_cond_or*) cond)->used_tables_cache; new_cond->top_level_item(); return new_cond; @@ -15642,16 +15748,14 @@ make_cond_for_table_from_pred(Item *root_cond, Item *cond, table_count times, we mark each item that we have examined with the result of the test */ - if ((cond->marker == 3 && !retain_ref_cond) || - (cond->used_tables() & ~tables) || - /* - When extracting constant conditions, treat expensive conditions as - non-constant, so that they are not evaluated at optimization time. - */ - (!used_table && exclude_expensive_cond && cond->is_expensive())) + if ((cond->marker == 3 && !retain_ref_cond) || + (cond->used_tables() & ~tables)) return (COND*) 0; // Can't check this yet if (cond->marker == 2 || cond->eq_cmp_result() == Item::COND_OK) + { + cond->set_join_tab_idx(join_tab_idx_arg); return cond; // Not boolean op + } if (cond->type() == Item::FUNC_ITEM && ((Item_func*) cond)->functype() == Item_func::EQ_FUNC) @@ -15672,11 +15776,11 @@ make_cond_for_table_from_pred(Item *root_cond, Item *cond, } } cond->marker=2; + cond->set_join_tab_idx(join_tab_idx_arg); return cond; } - static COND * make_cond_after_sjm(Item *root_cond, Item *cond, table_map tables, table_map sjm_tables) @@ -16832,6 +16936,10 @@ create_sort_index(THD *thd, JOIN *join, ORDER *order, table= tab->table; select= tab->select; + /* Currently ORDER BY ... LIMIT is not supported in subqueries. */ + DBUG_ASSERT(join->group_list || + !(join->unit->item && join->unit->item->is_in_predicate())); + /* When there is SQL_BIG_RESULT do not sort using index for GROUP BY, and thus force sorting on disk unless a group min-max optimization @@ -16943,7 +17051,8 @@ static bool fix_having(JOIN *join, Item **having) table_map used_tables= join->const_table_map | table->table->map; DBUG_EXECUTE("where",print_where(*having,"having", QT_ORDINARY);); - Item* sort_table_cond=make_cond_for_table(*having, used_tables, used_tables, + Item* sort_table_cond= make_cond_for_table(join->thd, *having, used_tables, + used_tables, MAX_TABLES, FALSE, FALSE); if (sort_table_cond) { @@ -16962,8 +17071,9 @@ static bool fix_having(JOIN *join, Item **having) DBUG_EXECUTE("where",print_where(table->select_cond, "select and having", QT_ORDINARY);); - *having= make_cond_for_table(*having,~ (table_map) 0,~used_tables, - FALSE, FALSE); + *having= make_cond_for_table(join->thd, *having, + ~ (table_map) 0,~used_tables, + MAX_TABLES, FALSE, FALSE); DBUG_EXECUTE("where", print_where(*having,"having after make_cond", QT_ORDINARY);); } @@ -19946,28 +20056,12 @@ bool mysql_explain_union(THD *thd, SELECT_LEX_UNIT *unit, select_result *result) bool res= 0; SELECT_LEX *first= unit->first_select(); - for (SELECT_LEX *sl= first; - sl; - sl= sl->next_select()) - { - // drop UNCACHEABLE_EXPLAIN, because it is for internal usage only - uint8 uncacheable= (sl->uncacheable & ~UNCACHEABLE_EXPLAIN); - sl->type= (((&thd->lex->select_lex)==sl)? - (sl->first_inner_unit() || sl->next_select() ? - "PRIMARY" : "SIMPLE"): - ((sl == first)? - ((sl->linkage == DERIVED_TABLE_TYPE) ? - "DERIVED": - ((uncacheable & UNCACHEABLE_DEPENDENT) ? - "DEPENDENT SUBQUERY": - (uncacheable?"UNCACHEABLE SUBQUERY": - "SUBQUERY"))): - ((uncacheable & UNCACHEABLE_DEPENDENT) ? - "DEPENDENT UNION": - uncacheable?"UNCACHEABLE UNION": - "UNION"))); + for (SELECT_LEX *sl= first; sl; sl= sl->next_select()) + { + sl->set_explain_type(); sl->options|= SELECT_DESCRIBE; } + if (unit->is_union()) { unit->fake_select_lex->select_number= UINT_MAX; // jost for initialization @@ -20383,6 +20477,8 @@ bool JOIN::change_result(select_result *res) { DBUG_ENTER("JOIN::change_result"); result= res; + if (tmp_join) + tmp_join->result= res; if (!procedure && (result->prepare(fields_list, select_lex->master_unit()) || result->prepare2())) { @@ -20426,5 +20522,154 @@ void JOIN::set_allowed_join_cache_types() /** + Save a query execution plan so that the caller can revert to it if needed, + and reset the current query plan so that it can be reoptimized. + + @param save_to The object into which the current query plan state is saved +*/ + +void JOIN::save_query_plan(Query_plan_state *save_to) +{ + if (keyuse.elements) + { + DYNAMIC_ARRAY tmp_keyuse; + /* Swap the current and the backup keyuse internal arrays. */ + tmp_keyuse= keyuse; + keyuse= save_to->keyuse; /* keyuse is reset to an empty array. */ + save_to->keyuse= tmp_keyuse; + + for (uint i= 0; i < tables; i++) + { + save_to->join_tab_keyuse[i]= join_tab[i].keyuse; + join_tab[i].keyuse= NULL; + save_to->join_tab_checked_keys[i]= join_tab[i].checked_keys; + join_tab[i].checked_keys.clear_all(); + } + } + memcpy((uchar*) save_to->best_positions, (uchar*) best_positions, + sizeof(POSITION) * (tables + 1)); + memset(best_positions, 0, sizeof(POSITION) * (tables + 1)); +} + + +/** + Restore a query execution plan previously saved by the caller. + + @param The object from which the current query plan state is restored. +*/ + +void JOIN::restore_query_plan(Query_plan_state *restore_from) +{ + if (restore_from->keyuse.elements) + { + DYNAMIC_ARRAY tmp_keyuse; + tmp_keyuse= keyuse; + keyuse= restore_from->keyuse; + restore_from->keyuse= tmp_keyuse; + + for (uint i= 0; i < tables; i++) + { + join_tab[i].keyuse= restore_from->join_tab_keyuse[i]; + join_tab[i].checked_keys= restore_from->join_tab_checked_keys[i]; + } + + } + memcpy((uchar*) best_positions, (uchar*) restore_from->best_positions, + sizeof(POSITION) * (tables + 1)); +} + + +/** + Reoptimize a query plan taking into account an additional conjunct to the + WHERE clause. + + @param added_where An extra conjunct to the WHERE clause to reoptimize with + @param join_tables The set of tables to reoptimize + @param save_to If != NULL, save here the state of the current query plan + + @notes + Given a query plan that was already optimized taking into account some WHERE + clause 'C', reoptimize this plan with a new WHERE clause 'C AND added_where'. + The reoptimization works as follows: + + 1. Call update_ref_and_keys *only* for the new conditions 'added_where' + that are about to be injected into the query. + 2. Expand if necessary the original KEYUSE array JOIN::keyuse to + accommodate the new REF accesses computed for the 'added_where' condition. + 3. Add the new KEYUSEs into JOIN::keyuse. + 4. Re-sort and re-filter the JOIN::keyuse array with the newly added + KEYUSE elements. + + @retval REOPT_NEW_PLAN there is a new plan. + @retval REOPT_OLD_PLAN no new improved plan was produced, use the old one. + @retval REOPT_ERROR an irrecovarable error occured during reoptimization. +*/ + +JOIN::enum_reopt_result +JOIN::reoptimize(Item *added_where, table_map join_tables, + Query_plan_state *save_to) +{ + DYNAMIC_ARRAY added_keyuse; + SARGABLE_PARAM *sargables= 0; /* Used only as a dummy parameter. */ + uint org_keyuse_elements; + + /* Re-run the REF optimizer to take into account the new conditions. */ + if (update_ref_and_keys(thd, &added_keyuse, join_tab, tables, added_where, + ~outer_join, select_lex, &sargables)) + { + delete_dynamic(&added_keyuse); + return REOPT_ERROR; + } + + if (!added_keyuse.elements) + { + delete_dynamic(&added_keyuse); + return REOPT_OLD_PLAN; + } + + if (save_to) + save_query_plan(save_to); + + if (!keyuse.buffer && + my_init_dynamic_array(&keyuse, sizeof(KEYUSE), 20, 64)) + { + delete_dynamic(&added_keyuse); + return REOPT_ERROR; + } + + org_keyuse_elements= save_to ? save_to->keyuse.elements : keyuse.elements; + allocate_dynamic(&keyuse, org_keyuse_elements + added_keyuse.elements); + + /* If needed, add the access methods from the original query plan. */ + if (save_to) + { + DBUG_ASSERT(!keyuse.elements); + memcpy(keyuse.buffer, + save_to->keyuse.buffer, + (size_t) save_to->keyuse.elements * keyuse.size_of_element); + keyuse.elements= save_to->keyuse.elements; + } + + /* Add the new access methods to the keyuse array. */ + memcpy(keyuse.buffer + keyuse.elements * keyuse.size_of_element, + added_keyuse.buffer, + (size_t) added_keyuse.elements * added_keyuse.size_of_element); + keyuse.elements+= added_keyuse.elements; + /* added_keyuse contents is copied, and it is no longer needed. */ + delete_dynamic(&added_keyuse); + + if (sort_and_filter_keyuse(&keyuse)) + return REOPT_ERROR; + optimize_keyuse(this, &keyuse); + + /* Re-run the join optimizer to compute a new query plan. */ + if (choose_plan(this, join_tables)) + return REOPT_ERROR; + + return REOPT_NEW_PLAN; +} + + +/** @} (end of group Query_Optimizer) */ diff --git a/sql/sql_select.h b/sql/sql_select.h index 748ae5a1dca..f6a68aca764 100644 --- a/sql/sql_select.h +++ b/sql/sql_select.h @@ -603,8 +603,53 @@ inline bool sj_is_materialize_strategy(uint strategy) class JOIN :public Sql_alloc { +private: JOIN(const JOIN &rhs); /**< not implemented */ JOIN& operator=(const JOIN &rhs); /**< not implemented */ + +protected: + + /** + The subset of the state of a JOIN that represents an optimized query + execution plan. Allows saving/restoring different plans for the same query. + */ + class Query_plan_state { + public: + DYNAMIC_ARRAY keyuse; /* Copy of the JOIN::keyuse array. */ + POSITION best_positions[MAX_TABLES+1]; /* Copy of JOIN::best_positions */ + /* Copies of the JOIN_TAB::keyuse pointers for each JOIN_TAB. */ + KEYUSE *join_tab_keyuse[MAX_TABLES]; + /* Copies of JOIN_TAB::checked_keys for each JOIN_TAB. */ + key_map join_tab_checked_keys[MAX_TABLES]; + public: + Query_plan_state() + { + keyuse.elements= 0; + keyuse.buffer= NULL; + } + Query_plan_state(JOIN *join); + ~Query_plan_state() + { + delete_dynamic(&keyuse); + } + }; + + /* Results of reoptimizing a JOIN via JOIN::reoptimize(). */ + enum enum_reopt_result { + REOPT_NEW_PLAN, /* there is a new reoptimized plan */ + REOPT_OLD_PLAN, /* no new improved plan can be found, use the old one */ + REOPT_ERROR, /* an irrecovarable error occured during reoptimization */ + REOPT_NONE /* not yet reoptimized */ + }; + + /* Support for plan reoptimization with rewritten conditions. */ + enum_reopt_result reoptimize(Item *added_where, table_map join_tables, + Query_plan_state *save_to); + void save_query_plan(Query_plan_state *save_to); + void restore_query_plan(Query_plan_state *restore_from); + /* Choose a subquery plan for a table-less subquery. */ + bool choose_tableless_subquery_plan(); + public: JOIN_TAB *join_tab,**best_ref; JOIN_TAB **map2table; ///< mapping between table indexes and JOIN_TABs @@ -702,6 +747,13 @@ public: account the changes made by test_if_skip_sort_order()). */ double best_read; + /* + Estimated result rows (fanout) of the whole query. If this is a subquery + that is reexecuted multiple times, this value includes the estiamted # of + reexecutions. This value is equal to the multiplication of all + join->positions[i].records_read of a JOIN. + */ + double record_count; List<Item> *fields; List<Cached_item> group_fields, group_fields_cache; TABLE *tmp_table; @@ -815,6 +867,19 @@ public: List<TABLE_LIST> *join_list; ///< list of joined tables in reverse order COND_EQUAL *cond_equal; COND_EQUAL *having_equal; + /* + Constant codition computed during optimization, but evaluated during + join execution. Typically expensive conditions that should not be + evaluated at optimization time. + */ + Item *exec_const_cond; + /* + Constant ORDER and/or GROUP expressions that contain subqueries. Such + expressions need to evaluated to verify that the subquery indeed + returns a single row. The evaluation of such expressions is delayed + until query execution. + */ + List<Item> exec_const_order_group_cond; SQL_SELECT *select; ///<created in optimisation phase JOIN_TAB *return_tab; ///<used only for outer joins Item **ref_pointer_array; ///<used pointer reference for this select @@ -825,8 +890,15 @@ public: bool union_part; ///< this subselect is part of union bool optimized; ///< flag to avoid double optimization in EXPLAIN + bool initialized; ///< flag to avoid double init_execution calls Array<Item_in_subselect> sj_subselects; + /* + Additional WHERE and HAVING predicates to be considered for IN=>EXISTS + subquery transformation of a JOIN object. + */ + Item *in_to_exists_where; + Item *in_to_exists_having; /* Temporary tables used to weed-out semi-join duplicates */ List<TABLE> sj_tmp_tables; @@ -901,8 +973,10 @@ public: ref_pointer_array_size= 0; zero_result_cause= 0; optimized= 0; + initialized= 0; cond_equal= 0; having_equal= 0; + exec_const_cond= 0; group_optimized_away= 0; no_rows_in_result_called= 0; @@ -917,20 +991,24 @@ public: no_const_tables= FALSE; first_select= sub_select; outer_ref_cond= 0; + in_to_exists_where= NULL; + in_to_exists_having= NULL; } int prepare(Item ***rref_pointer_array, TABLE_LIST *tables, uint wind_num, COND *conds, uint og_num, ORDER *order, ORDER *group, Item *having, ORDER *proc_param, SELECT_LEX *select, SELECT_LEX_UNIT *unit); + bool prepare_stage2(); int optimize(); int reinit(); + int init_execution(); void exec(); int destroy(); void restore_tmp(); bool alloc_func_list(); bool flatten_subqueries(); - bool setup_subquery_materialization(); + bool optimize_unflattened_subqueries(); bool make_sum_func_list(List<Item> &all_fields, List<Item> &send_fields, bool before_group_by, bool recompute= FALSE); @@ -966,7 +1044,7 @@ public: bool init_save_join_tab(); bool send_row_on_empty_set() { - return (do_send_rows && implicit_grouping && + return (do_send_rows && implicit_grouping && !group_optimized_away && having_value != Item::COND_FALSE); } bool change_result(select_result *result); @@ -999,6 +1077,11 @@ public: return test(allowed_join_cache_types & JOIN_CACHE_HASHED_BIT) && max_allowed_join_cache_level > JOIN_CACHE_HASHED_BIT; } + bool choose_subquery_plan(table_map join_tables); + void get_partial_join_cost(uint n_tables, + double *read_time_arg, double *record_count_arg); + /* defined in opt_subselect.cc */ + bool transform_max_min_subquery(); private: /** @@ -1234,6 +1317,9 @@ protected: if (!inited) { inited=1; + TABLE *table= to_field->table; + my_bitmap_map *old_map= dbug_tmp_use_all_columns(table, + table->write_set); if ((res= item->save_in_field(to_field, 1))) { if (!err) @@ -1245,6 +1331,7 @@ protected: */ if (!err && to_field->table->in_use->is_error()) err= 1; /* STORE_KEY_FATAL */ + dbug_tmp_restore_column_map(table->write_set, old_map); } null_key= to_field->is_null() || item->null_value; return (err > 2 ? STORE_KEY_FATAL : (store_key_result) err); @@ -1263,9 +1350,7 @@ inline Item * and_items(Item* cond, Item *item) { return (cond? (new Item_cond_and(cond, item)) : item); } -bool choose_plan(JOIN *join,table_map join_tables); -void get_partial_join_cost(JOIN *join, uint n_tables, double *read_time_arg, - double *record_count_arg); +bool choose_plan(JOIN *join, table_map join_tables); void optimize_wo_join_buffering(JOIN *join, uint first_tab, uint last_tab, table_map last_remaining_tables, bool first_alt, uint no_jbuf_before, @@ -1310,5 +1395,6 @@ bool create_internal_tmp_table(TABLE *table, KEY *keyinfo, ulonglong options); bool open_tmp_table(TABLE *table); void setup_tmp_table_column_bitmaps(TABLE *table, uchar *bitmaps); +double prev_record_reads(POSITION *positions, uint idx, table_map found_ref); #endif /* SQL_SELECT_INCLUDED */ diff --git a/sql/sql_union.cc b/sql/sql_union.cc index 898df3dd65e..192ea31c610 100644 --- a/sql/sql_union.cc +++ b/sql/sql_union.cc @@ -192,6 +192,8 @@ st_select_lex_unit::init_prepare_fake_select_lex(THD *thd_arg) { (*order->item)->walk(&Item::change_context_processor, 0, (uchar*) &fake_select_lex->context); + (*order->item)->walk(&Item::set_fake_select_as_master_processor, 0, + (uchar*) fake_select_lex); } } @@ -276,6 +278,18 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result, can_skip_order_by= is_union_select && !(sl->braces && sl->explicit_limit); + /* + Remove all references from the select_lex_units to the subqueries that + are inside the ORDER BY clause. + */ + if (can_skip_order_by) + { + for (ORDER *ord= (ORDER *)sl->order_list.first; ord; ord= ord->next) + { + (*ord->item)->walk(&Item::eliminate_subselect_processor, FALSE, NULL); + } + } + saved_error= join->prepare(&sl->ref_pointer_array, sl->table_list.first, sl->with_wild, diff --git a/sql/sql_update.cc b/sql/sql_update.cc index 6ec95989f38..c7764274bde 100644 --- a/sql/sql_update.cc +++ b/sql/sql_update.cc @@ -307,6 +307,10 @@ int mysql_update(THD *thd, DBUG_RETURN(1); /* purecov: inspected */ } + /* Apply the IN=>EXISTS transformation to all subqueries and optimize them. */ + if (select_lex->optimize_unflattened_subqueries()) + DBUG_RETURN(TRUE); + if (select_lex->inner_refs_list.elements && fix_inner_refs(thd, all_fields, select_lex, select_lex->ref_pointer_array)) DBUG_RETURN(1); |