[MDEV-4209] Wrong result for a simple join over a materialized view with a blob column - Jira

The following test case returns a wrong result in MariaDB 5.3/5.5:

CREATE TABLE t1 (c1 text, c2 int);

INSERT INTO t1 VALUES ('a',1), ('c',3), ('g',7), ('d',4), ('c',3);

CREATE TABLE t2 (c1 text, c2 int);

INSERT INTO t2 VALUES ('b',2), ('c',3);

CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;

SELECT v1.c1, v1.c2 FROM v1, t2 WHERE v1.c1=t2.c1 AND v1.c2=t2.c2;

The last query from the test case returns:

MariaDB [test]> SELECT v1.c1, v1.c2 FROM v1, t2 WHERE v1.c1=t2.c1 AND v1.c2=t2.c2;

Empty set (0.00 sec)

The correct result is:

MariaDB [test]> SELECT v1.c1, v1.c2 FROM v1, t2 WHERE v1.c1=t2.c1 AND v1.c2=t2.c2;

+------+------+

| c1   | c2   |

+------+------+

| c    |    3 |

| c    |    3 |

+------+------+

2 rows in set (0.01 sec)

This result can be obtained if
SET optimizer_switch = 'derived_with_keys=off';

The fix for this bug was applied to the 5.3 tree in rev 3631 on 2013-02-28.

Igor Babaev (Inactive) added a comment - 2013-03-01 18:45 The fix for this bug was applied to the 5.3 tree in rev 3631 on 2013-02-28.

Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.

MariaDB Server