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MDEV-6736: Valgrind warnings 'Invalid read' in subselect_engine::calc_const_tables with SQ in WHERE and

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HAVING, ORDER BY, materialization+semijoin

During cleanup a pointer to the materialised table that was freed was not set to NULL
This commit is contained in:
Varun Gupta
2018-03-16 18:57:21 +05:30
parent 3d5dff6cae
commit e3dd9a95e5
3 changed files with 35 additions and 1 deletions
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18
mysql-test/t/having.test
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@ -759,4 +759,22 @@ SELECT * FROM t1 JOIN t2 ON c1 = c2 HAVING c2 > 'a' ORDER BY c2 LIMIT 1;
DROP TABLE t1,t2;
--echo #
--echo # MDEV-6736: Valgrind warnings 'Invalid read' in subselect_engine::calc_const_tables with SQ
--echo # in WHERE and HAVING, ORDER BY, materialization+semijoin
--echo #
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (3),(8);
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (2),(1);
SELECT a FROM t1
WHERE 9 IN ( SELECT MIN( a ) FROM t1 )
HAVING a <> ( SELECT COUNT(*) FROM t2 )
ORDER BY a;
DROP TABLE t1,t2;
--echo End of 10.0 tests