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Fix for BUG#11821 manually merged

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This commit is contained in:
sergefp@mysql.com 2005-07-12 17:11:24 +00:00
commit 32a4e52d97
3 changed files with 20 additions and 2 deletions
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6
mysql-test/r/subselect.result
View file

@ -2837,3 +2837,9 @@ WHERE select_id = 0 OR select_id = 1);
values_id
1
DROP TABLE t1, t2;
create table t1 (fld enum('0','1'));
insert into t1 values ('1');
select * from (select max(fld) from t1) as foo;
max(fld)
1
drop table t1;

8
mysql-test/t/subselect.test
View file

@ -1859,3 +1859,11 @@ WHERE values_id IN (SELECT values_id FROM t2
WHERE select_id = 0 OR select_id = 1);
DROP TABLE t1, t2;
# BUG#11821 : Select from subselect using aggregate function on an enum
# segfaults:
create table t1 (fld enum('0','1'));
insert into t1 values ('1');
select * from (select max(fld) from t1) as foo;
drop table t1;

8
sql/item.cc
View file

@ -5421,9 +5421,13 @@ void Item_type_holder::get_full_info(Item *item)
if (fld_type == MYSQL_TYPE_ENUM ||
fld_type == MYSQL_TYPE_SET)
{
if (item->type() == Item::SUM_FUNC_ITEM &&
(((Item_sum*)item)->sum_func() == Item_sum::MAX_FUNC ||
((Item_sum*)item)->sum_func() == Item_sum::MIN_FUNC))
item = ((Item_sum*)item)->args[0];
/*
We can have enum/set type after merging only if we have one enum/set
field and number of NULL fields
We can have enum/set type after merging only if we have one enum|set
field (or MIN|MAX(enum|set field)) and number of NULL fields
*/
DBUG_ASSERT((enum_set_typelib &&
get_real_type(item) == MYSQL_TYPE_NULL) ||