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sql/item_cmpfunc.h:
  Auto merged
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unknown
2005-09-09 09:44:58 +02:00
parent ee7f419264 213fa9cbc2
commit 5facb89827
3 changed files with 20 additions and 1 deletions
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9
mysql-test/r/group_by.result
View File

@ -758,6 +758,15 @@ select date(left(f1+0,8)) from t1 group by 1;
date(left(f1+0,8)) date(left(f1+0,8))
2005-06-06 2005-06-06
drop table t1; drop table t1;
create table t1(f1 varchar(5) key);
insert into t1 values (1),(2);
select sql_buffer_result max(f1) is null from t1;
max(f1) is null
0
select sql_buffer_result max(f1)+1 from t1;
max(f1)+1
3
drop table t1;
CREATE TABLE t1 (n int); CREATE TABLE t1 (n int);
INSERT INTO t1 VALUES (1); INSERT INTO t1 VALUES (1);
SELECT n+1 AS n FROM t1 GROUP BY n; SELECT n+1 AS n FROM t1 GROUP BY n;

10
mysql-test/t/group_by.test
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@ -602,6 +602,16 @@ SELECT n+1 AS n FROM t1 GROUP BY n;
--enable_ps_protocol --enable_ps_protocol
DROP TABLE t1; DROP TABLE t1;
#
# BUG#12695: Item_func_isnull::update_used_tables
# did not update const_item_cache
#
create table t1(f1 varchar(5) key);
insert into t1 values (1),(2);
select sql_buffer_result max(f1) is null from t1;
select sql_buffer_result max(f1)+1 from t1;
drop table t1;
# End of 4.1 tests # End of 4.1 tests
# #

2
sql/item_cmpfunc.h
View File

@ -910,7 +910,7 @@ public:
else else
{ {
args[0]->update_used_tables(); args[0]->update_used_tables();
if (!(used_tables_cache=args[0]->used_tables())) if ((const_item_cache= !(used_tables_cache= args[0]->used_tables())))
{ {
/* Remember if the value is always NULL or never NULL */ /* Remember if the value is always NULL or never NULL */
cached_value= (longlong) args[0]->is_null(); cached_value= (longlong) args[0]->is_null();