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Bug#11765713 58705: OPTIMIZER LET ENGINE DEPEND ON UNINITIALIZED VALUES CREATED BY OPT_SUM_QU

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Valgrind warnings were caused by comparing index values to an un-initialized field.


mysql-test/r/subselect.result:
  New test cases.
mysql-test/t/subselect.test:
  New test cases.
sql/opt_sum.cc:
  Add thd to opt_sum_query enabling it to test for errors.
  If we have a non-nullable index, we cannot use it to match null values,
  since set_null() will be ignored, and we might compare uninitialized data.
sql/sql_select.cc:
  Add thd to opt_sum_query, enabling it to test for errors.
sql/sql_select.h:
  Add thd to opt_sum_query, enabling it to test for errors.
This commit is contained in:
Tor Didriksen
2011-04-14 16:35:24 +02:00
parent 7634e724e7
commit dd3d9477b2
5 changed files with 74 additions and 14 deletions
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18
mysql-test/r/subselect.result
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@ -4734,3 +4734,21 @@ SELECT * FROM t2 UNION SELECT * FROM t2
ORDER BY (SELECT * FROM t1 WHERE MATCH(a) AGAINST ('+abc' IN BOOLEAN MODE));
DROP TABLE t1,t2;
End of 5.1 tests
#
# Bug #11765713 58705:
# OPTIMIZER LET ENGINE DEPEND ON UNINITIALIZED VALUES
# CREATED BY OPT_SUM_QUERY
#
CREATE TABLE t1(a INT NOT NULL, KEY (a));
INSERT INTO t1 VALUES (0), (1);
SELECT 1 as foo FROM t1 WHERE a < SOME
(SELECT a FROM t1 WHERE a <=>
(SELECT a FROM t1)
);
ERROR 21000: Subquery returns more than 1 row
SELECT 1 as foo FROM t1 WHERE a < SOME
(SELECT a FROM t1 WHERE a <=>
(SELECT a FROM t1 where a is null)
);
foo
DROP TABLE t1;