MySQL Bugs: #19906: REPLACE doesn't update TEXT fields correctly

Bug #19906	REPLACE doesn't update TEXT fields correctly
Submitted:	18 May 2006 10:44	Modified:	22 Jun 2006 8:23
Reporter:	Geert Vanderkelen	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Cluster: Cluster (NDB) storage engine	Severity:	S1 (Critical)
Version:	5.0, 5.1	OS:	Linux (Linux)
Assigned to:	Martin Skold	CPU Architecture:	Any

Description:

Having a table with primary key and unique index, the TEXT fields are not updated correctly. It does work when there is no unique index..

See 'How to repeat' for more:

mysql> REPLACE INTO t1 (a,b,c,x,y,z,i) VALUES (1,1,1,'a','a','a',1), (1,1,1,'b','b','b',2), (1,1,1,'c','c','c',3);

mysql> select * from t1;
+---+---+---+------+------+------+----+------+
| a | b | c | x    | y    | z    | id | i    |
+---+---+---+------+------+------+----+------+
| 1 | 1 | 1 | a    | a    | a    |  3 |    3 | 
+---+---+---+------+------+------+----+------+

If you have the same table made with MyISAM, you would have:

+---+---+---+------+------+------+----+------+
| a | b | c | x    | y    | z    | id | i    |
+---+---+---+------+------+------+----+------+
| 1 | 1 | 1 | c    | c    | c    |  3 |    3 | 
+---+---+---+------+------+------+----+------+

Now, I thought doing the statements seperately with the NDB table:
mysql> replace into t1(a,b,c,x,y,z,i) values (1,1,1,'a','a','a',1);
mysql> replace into t1(a,b,c,x,y,z,i) values (1,1,1,'b','b','b',2);

But the result is wrong:
+---+---+---+------+------+------+----+------+
| a | b | c | x    | y    | z    | id | i    |
+---+---+---+------+------+------+----+------+
| 1 | 1 | 1 | a    | a    | a    |  2 |    2 | 
+---+---+---+------+------+------+----+------+

How to repeat:

CREATE TABLE `t1` (
  `a` int(11) NOT NULL,
  `b` int(11) NOT NULL,
  `c` int(11) NOT NULL,
  `x` text,
  `y` text,
  `z` text,
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `i` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `a` (`a`,`b`,`c`)
) ENGINE=ndbcluster;

REPLACE INTO t1 (a,b,c,x,y,z,i) VALUES (1,1,1,'a','a','a',1), (1,1,1,'b','b','b',2), (1,1,1,'c','c','c',3);

SELECT * FROM t1;

REPLACE INTO t1(a,b,c,x,y,z,i) values (1,1,1,'a','a','a',1);
REPLACE INTO t1(a,b,c,x,y,z,i) values (1,1,1,'b','b','b',2);

SELECT * FROM t1;

customer gives higher prio = 29

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/7921

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/7922

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/7928

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/7990

Thank you for your bug report. This issue has been committed to our
source repository of that product and will be incorporated into the
next release.

If necessary, you can access the source repository and build the latest
available version, including the bugfix, yourself. More information 
about accessing the source trees is available at
    http://www.mysql.com/doc/en/Installing_source_tree.html

Additional info:

Documented bugfix in 5.0.23 and 5.1.12 changelogs. Closed.