database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-09-02 09:41:40 +03:00
Code Activity

Bug#50995 Having clause on subquery result produces incorrect results.

Browse Source 
The problem is that cond->fix_fields(thd, 0) breaks
condition(cuts off 'having'). The reason of that is
that NULL valued Item pointer is present in the
middle of Item list and it breaks the Item processing
loop.
This commit is contained in:
Sergey Glukhov
2010-02-26 15:39:25 +04:00
parent 79d8de67a9
commit fe94dec679
4 changed files with 66 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
mysql-test/r/having.result
View File

@@ -430,4 +430,24 @@ SELECT b, COUNT(DISTINCT a) FROM t1 GROUP BY b HAVING b is NULL;
b COUNT(DISTINCT a)
NULL 1
DROP TABLE t1;
#
# Bug#50995 Having clause on subquery result produces incorrect results.
#
CREATE TABLE t1
(
id1 INT,
id2 INT NOT NULL,
INDEX id1(id2)
);
INSERT INTO t1 SET id1=1, id2=1;
INSERT INTO t1 SET id1=2, id2=1;
INSERT INTO t1 SET id1=3, id2=1;
SELECT t1.id1,
(SELECT 0 FROM DUAL
WHERE t1.id1=t1.id1) AS amount FROM t1
WHERE t1.id2 = 1
HAVING amount > 0
ORDER BY t1.id1;
id1 amount
DROP TABLE t1;
End of 5.0 tests