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MDEV-24898: Server crashes in st_select_lex::next_select

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(trivial backport to 10.2)
Add a testcase
This commit is contained in:
Sergei Petrunia 2021-04-23 19:45:09 +03:00
commit 2f6912dabc
2 changed files with 24 additions and 0 deletions
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11
mysql-test/r/subselect4.result
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@ -2772,3 +2772,14 @@ GROUP BY 1
)
1
DROP TABLE t1;
#
# MDEV-24898: Server crashes in st_select_lex::next_select / Item_subselect::is_expensive
# (Testcase)
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (3),(4);
SELECT 1 IN (SELECT (SELECT a FROM t1) AS x FROM t2 GROUP BY x);
ERROR 21000: Subquery returns more than 1 row
drop table t1,t2;

13
mysql-test/t/subselect4.test
View file

@ -2269,3 +2269,16 @@ SELECT
);
DROP TABLE t1;
--echo #
--echo # MDEV-24898: Server crashes in st_select_lex::next_select / Item_subselect::is_expensive
--echo # (Testcase)
--echo #
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2); # Optional, fails either way
CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (3),(4); # Optional, fails either way
--error ER_SUBQUERY_NO_1_ROW
SELECT 1 IN (SELECT (SELECT a FROM t1) AS x FROM t2 GROUP BY x);
drop table t1,t2;