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Fix bug#13356 resolve_const_item() wasn't able to handle Item_row items.

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resolve_const_item() assumed to be not called for Item_row items. For
ensuring that DBUG_ASSERT(0) was set there.

This patch adds section for Item_row items. If it can it recursively calls
resolve_const_item() for each item the Item_row contains. If any of the
contained items is null then whole Item_row substitued by Item_null. Otherwise
it just returns.
This commit is contained in:
evgen@moonbone.local
2005-09-28 00:58:12 +04:00
parent a5feed9813
commit 4f4711bd49
3 changed files with 48 additions and 0 deletions
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9
mysql-test/r/select.result
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@@ -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;