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Merge 10.2 into 10.3

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Marko Mäkelä 2018-07-26 08:54:44 +03:00
commit 93b6552182
30 changed files with 508 additions and 190 deletions
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16
mysql-test/main/subselect_no_opts.result
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@ -7230,6 +7230,22 @@ a
5
SET @@optimizer_switch= @optimiser_switch_save;
DROP TABLE t1, t2, t3;
#
# MDEV-16820: impossible where with inexpensive subquery
#
create table t1 (a int) engine=myisam;
insert into t1 values (3), (1), (7);
create table t2 (b int, index idx(b));
insert into t2 values (2), (5), (3), (2);
explain select * from t1 where (select max(b) from t2) = 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
2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
explain select * from t1 where (select max(b) from t2) = 10 and t1.a > 3;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
drop table t1,t2;
End of 5.5 tests
# End of 10.0 tests
#