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Diffstat (limited to '')
| -rw-r--r-- | mysql-test/main/subselect4.test | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mysql-test/main/subselect4.test b/mysql-test/main/subselect4.test index 41fa9066..854b3736 100644 --- a/mysql-test/main/subselect4.test +++ b/mysql-test/main/subselect4.test @@ -2670,5 +2670,20 @@ DEALLOCATE PREPARE stmt; DROP TABLE t1,t2,t3; +--echo # +--echo # MDEV-33747: Optimization of (SELECT) IN (SELECT ...) executes subquery at prepare stage +--echo # +create table t1 (a int, b int); +insert into t1 select seq, seq from seq_1_to_200; +create table t2 as select * from t1; +create table t3 as select * from t1; +analyze table t1,t2,t3; +select @@expensive_subquery_limit < 200 as DEFAULTS_ARE_SUITABLE; +flush status; +explain select * from t1 where a<3 or (select max(a) from t2) in (select b from t3); +--echo # Must show 0. If this shows 200, this means subquery was executed and you have a bug: +show status like 'Handler_read_rnd_next%'; +drop table t1,t2,t3; + --echo # End of 10.4 tests |