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Diffstat (limited to 'mysql-test/main/selectivity_innodb.result')
| -rw-r--r-- | mysql-test/main/selectivity_innodb.result | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/mysql-test/main/selectivity_innodb.result b/mysql-test/main/selectivity_innodb.result index b293f6adb5f..062b2da7b4f 100644 --- a/mysql-test/main/selectivity_innodb.result +++ b/mysql-test/main/selectivity_innodb.result @@ -1820,6 +1820,62 @@ b a a b 9 9 10 10 set optimizer_use_condition_selectivity= @@optimizer_use_condition_selectivity; drop table t1,t2,t3; +# +# MDEV-20519: Query plan regression with optimizer_use_condition_selectivity=4 +# +create table t1 (id int, a int, PRIMARY KEY(id), key(a)); +insert into t1 select seq,seq from seq_1_to_100; +create table t2 (id int, a int, b int, PRIMARY KEY(id), key(a), key(b)); +insert into t2 select seq,seq,seq from seq_1_to_100; +set optimizer_switch='exists_to_in=off'; +set optimizer_use_condition_selectivity=2; +SELECT * FROM t1 +WHERE +EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id +WHERE A.a=t1.a AND t2.b < 20); +id a +1 1 +2 2 +3 3 +4 4 +5 5 +6 6 +7 7 +8 8 +9 9 +10 10 +11 11 +12 12 +13 13 +14 14 +15 15 +16 16 +17 17 +18 18 +19 19 +explain SELECT * FROM t1 +WHERE +EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id +WHERE A.a=t1.a AND t2.b < 20); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL a 5 NULL 100 Using where; Using index +2 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1 Using index +2 DEPENDENT SUBQUERY t2 ref a,b a 5 test.A.id 1 Using where +EXPLAIN SELECT * FROM t1 A, t1 B WHERE A.a = B.a and A.id = 65; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE A const PRIMARY,a PRIMARY 4 const 1 +1 SIMPLE B ref a a 5 const 1 Using index +explain SELECT * FROM t1 +WHERE +EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id +WHERE A.a=t1.a AND t2.b < 20); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL a 5 NULL 100 Using where; Using index +2 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1 Using index +2 DEPENDENT SUBQUERY t2 ref a,b a 5 test.A.id 1 Using where +set optimizer_switch= @save_optimizer_switch; +set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity; +drop table t1,t2; # End of 10.1 tests set @@global.histogram_size=@save_histogram_size; set optimizer_switch=@save_optimizer_switch_for_selectivity_test; |