diff options
Diffstat (limited to 'mysql-test/t/subselect.test')
| -rw-r--r-- | mysql-test/t/subselect.test | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test index a39b7ea49b8..abce58348da 100644 --- a/mysql-test/t/subselect.test +++ b/mysql-test/t/subselect.test @@ -94,8 +94,11 @@ explain extended (select * from t2 where t2.b=(select a from t3 order by 1 desc select (select a from t3 where a<t2.a*4 order by 1 desc limit 1), a from t2; select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from (select * from t2 where a>1) as tt; +set @tmp_optimizer_switch=@@optimizer_switch; +set optimizer_switch='derived_merge=off,derived_with_keys=off'; explain extended select (select t3.a from t3 where a<8 order by 1 desc limit 1), a from (select * from t2 where a>1) as tt; +set optimizer_switch=@tmp_optimizer_switch; select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3) order by 1 desc limit 1); select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a > t1.a) order by 1 desc limit 1); select * from t1 where t1.a=(select t2.a from t2 where t2.b=(select max(a) from t3 where t3.a < t1.a) order by 1 desc limit 1); @@ -4648,7 +4651,10 @@ CREATE TABLE t1 (a INT, b INT, INDEX (a)); INSERT INTO t1 VALUES (3, 10), (2, 20), (7, 10), (5, 20); --echo +set @tmp_optimizer_switch=@@optimizer_switch; +set optimizer_switch='derived_merge=off,derived_with_keys=off'; EXPLAIN SELECT * FROM (SELECT * FROM t1 WHERE a=7) t; +set optimizer_switch=@tmp_optimizer_switch; --echo EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7); |