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Bug#45989 memory leak after explain encounters an error in the query

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Memory allocated in TMP_TABLE_PARAM::copy_field is not cleaned up.
The fix is to clean up TMP_TABLE_PARAM::copy_field array in JOIN::destroy.
This commit is contained in:
Sergey Glukhov
2009-09-04 12:20:53 +05:00
parent eebffb422b
commit e1d49b8143
3 changed files with 20 additions and 1 deletions
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8
mysql-test/r/explain.result
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@ -159,3 +159,11 @@ CREATE TABLE t1 (a INT PRIMARY KEY);
EXPLAIN EXTENDED SELECT COUNT(a) FROM t1 USE KEY(a);
ERROR HY000: Key 'a' doesn't exist in table 't1'
DROP TABLE t1;
CREATE TABLE t1(a LONGTEXT);
INSERT INTO t1 VALUES (repeat('a',@@global.max_allowed_packet));
INSERT INTO t1 VALUES (repeat('b',@@global.max_allowed_packet));
EXPLAIN SELECT DISTINCT 1 FROM t1,
(SELECT DISTINCTROW a AS away FROM t1 GROUP BY a WITH ROLLUP) as d1
WHERE t1.a = d1.a;
ERROR 42S22: Unknown column 'd1.a' in 'where clause'
DROP TABLE t1;