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Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-4.1

Browse source 
into moonbone.local:/work/13356-bug-4.1-mysql
This commit is contained in:
unknown 2005-09-28 01:06:16 +04:00
commit 0559f1e012
3 changed files with 48 additions and 0 deletions
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9
mysql-test/r/select.result
View file

@ -2617,3 +2617,12 @@ select found_rows();
found_rows()
1
DROP TABLE t1;
create table t1(f1 int, f2 int);
create table t2(f3 int);
select f1 from t1,t2 where f1=f2 and (f1,f2) = ((1,1));
f1
select f1 from t1,t2 where f1=f2 and (f1,NULL) = ((1,1));
f1
select f1 from t1,t2 where f1=f2 and (f1,f2) = ((1,NULL));
f1
drop table t1,t2;

10
mysql-test/t/select.test
View file

@ -2164,4 +2164,14 @@ select found_rows();
DROP TABLE t1;
#
# Bug #13356 assertion failed in resolve_const_item()
#
create table t1(f1 int, f2 int);
create table t2(f3 int);
select f1 from t1,t2 where f1=f2 and (f1,f2) = ((1,1));
select f1 from t1,t2 where f1=f2 and (f1,NULL) = ((1,1));
select f1 from t1,t2 where f1=f2 and (f1,f2) = ((1,NULL));
drop table t1,t2;
# End of 4.1 tests

29
sql/item.cc
View file

@ -2870,6 +2870,35 @@ void resolve_const_item(THD *thd, Item **ref, Item *comp_item)
new_item= (null_value ? (Item*) new Item_null(name) :
(Item*) new Item_int(name, result, length));
}
else if (res_type == ROW_RESULT)
{
new_item= 0;
/*
If item and comp_item are both Item_rows and have same number of cols
then process items in Item_row one by one. If Item_row contain nulls
substitute it by Item_null. Otherwise just return.
*/
if (item->result_type() == comp_item->result_type() &&
((Item_row*)item)->cols() == ((Item_row*)comp_item)->cols())
{
Item_row *item_row= (Item_row*)item,*comp_item_row= (Item_row*)comp_item;
if (item_row->null_inside())
new_item= (Item*) new Item_null(name);
else
{
int i= item_row->cols() - 1;
for (; i >= 0; i--)
{
if (item_row->maybe_null && item_row->el(i)->is_null())
{
new_item= (Item*) new Item_null(name);
break;
}
resolve_const_item(thd, item_row->addr(i), comp_item_row->el(i));
}
}
}
}
else
{ // It must REAL_RESULT
double result=item->val();