Bug #39146 Convertion to unsigned bigint where it must be signed int
Submitted: 1 Sep 2008 5:08 Modified: 11 Sep 2008 10:10
Reporter: Abdullah Sawas Email Updates:
Status: Not a Bug Impact on me:
None 
Category:MySQL Server: Data Types Severity:S3 (Non-critical)
Version:4.1.22-standard-log, 4.1, 5.0, 5.1, 6.0 bzr OS:Any
Assigned to: CPU Architecture:Any

[1 Sep 2008 5:08] Abdullah Sawas 
Description:
the script will show the bug ;)

CREATE TABLE `table1` (
  `dateline` int(10) unsigned NOT NULL default '0'
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

-- 
-- Dumping data for table `table1`
-- 

INSERT INTO `table1` VALUES (1220226152);

SELECT dateline, 1220229263, dateline - 1220229263, 1220226152 - 1220229263, -(-dateline + 1220229263)
FROM table1

How to repeat:
CREATE TABLE `table1` (
  `dateline` int(10) unsigned NOT NULL default '0'
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

-- 
-- Dumping data for table `table1`
-- 

INSERT INTO `table1` VALUES (1220226152);

SELECT dateline, 1220229263, dateline - 1220229263, 1220226152 - 1220229263, -(-dateline + 1220229263)
FROM table1

Suggested fix:
??
[1 Sep 2008 14:00] Sveta Smirnova 
Thank you for the report.

Verified as described.

I think this is mostly documentation problem.
[2 Sep 2008 11:36] Abdullah Sawas 
Thank you for responding.

Can you please tell me what do you mean by documentation problem?
[11 Sep 2008 10:10] Sergei Golubchik 
Expected behavior. Search the manual for NO_UNSIGNED_SUBTRACTION