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MDEV-5113 Wrong result (extra row) and valgrind warnings in Item_maxmin_subselect::any_value on 2nd execution of PS with SELECT subquery

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When setting Item_func_not_all::test_sum_item or Item_func_not_all::test_sub_item,
reset the other one to NULL - they can never be set both. When a PS is reexecuted,
different executions might be optimized differently and a wrong test_su*_item
might stay set from the previous execution.
This commit is contained in:
Sergei Golubchik 2013-11-12 15:02:25 +01:00
parent c98a054fde
commit 441192bfb0
3 changed files with 38 additions and 2 deletions
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16
mysql-test/r/ps_max_subselect-5113.result Normal file
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@ -0,0 +1,16 @@
CREATE TABLE t1 (b INT NOT NULL);
INSERT INTO t1 VALUES (0),(8);
PREPARE stmt FROM '
SELECT 1 FROM t1 AS o
WHERE o.b >= ALL (
SELECT a2.b FROM t1 AS a1 LEFT JOIN t1 AS a2 ON ( a2.b = a1.b )
WHERE a1.b <= a2.b
)
';
EXECUTE stmt;
1
1
EXECUTE stmt;
1
1
DROP TABLE t1;

20
mysql-test/t/ps_max_subselect-5113.test Normal file
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@ -0,0 +1,20 @@
#
# MDEV-5113 Wrong result (extra row) and valgrind warnings in Item_maxmin_subselect::any_value on 2nd execution of PS with SELECT subquery
#
CREATE TABLE t1 (b INT NOT NULL);
INSERT INTO t1 VALUES (0),(8);
PREPARE stmt FROM '
SELECT 1 FROM t1 AS o
WHERE o.b >= ALL (
SELECT a2.b FROM t1 AS a1 LEFT JOIN t1 AS a2 ON ( a2.b = a1.b )
WHERE a1.b <= a2.b
)
';
EXECUTE stmt;
EXECUTE stmt;
DROP TABLE t1;

4
sql/item_cmpfunc.h
View File

@ -508,8 +508,8 @@ public:
bool fix_fields(THD *thd, Item **ref)
{return Item_func::fix_fields(thd, ref);}
virtual void print(String *str, enum_query_type query_type);
void set_sum_test(Item_sum_hybrid *item) { test_sum_item= item; };
void set_sub_test(Item_maxmin_subselect *item) { test_sub_item= item; };
void set_sum_test(Item_sum_hybrid *item) { test_sum_item= item; test_sub_item= 0; };
void set_sub_test(Item_maxmin_subselect *item) { test_sub_item= item; test_sum_item= 0;};
bool empty_underlying_subquery();
Item *neg_transformer(THD *thd);
};