diff options
Diffstat (limited to 'mysql-test/main/group_min_max.test')
| -rw-r--r-- | mysql-test/main/group_min_max.test | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/mysql-test/main/group_min_max.test b/mysql-test/main/group_min_max.test index adad9073235..e8245dd2898 100644 --- a/mysql-test/main/group_min_max.test +++ b/mysql-test/main/group_min_max.test @@ -1519,6 +1519,23 @@ ALTER TABLE t1 ADD KEY(id,a); SELECT id,MIN(a),MAX(a) FROM t1 WHERE a>=DATE'2001-01-04' GROUP BY id; DROP TABLE t1; +--echo # +--echo # MDEV-17039: Query plan changes when we use GROUP BY optimization with optimizer_use_condition_selectivity=4 +--echo # and use_stat_tables= PREFERABLY +--echo # + +CREATE TABLE t1 (a INT, b INT,c INT DEFAULT 0, INDEX (a,b)); +INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3), (1,4), (1,5), +(2,2), (2,3), (2,1), (3,1), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6); +set @save_optimizer_use_condition_selectivity= @@optimizer_use_condition_selectivity; +set @save_use_stat_tables= @@use_stat_tables; +set @@optimizer_use_condition_selectivity=4; +set @@use_stat_tables=PREFERABLY; +explain extended SELECT a FROM t1 AS t1_outer WHERE a IN (SELECT max(b) FROM t1 GROUP BY a); +set @@optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity; +set @@use_stat_tables=@save_use_stat_tables; +explain extended SELECT a FROM t1 AS t1_outer WHERE a IN (SELECT max(b) FROM t1 GROUP BY a); +drop table t1; --echo # --echo # End of 10.0 tests |