MySQL Bugs: #21789: DATETIME with 0000-00-00 11:22:33 should be invalid, but is accepted

Bug #21789	DATETIME with 0000-00-00 11:22:33 should be invalid, but is accepted
Submitted:	22 Aug 2006 18:19	Modified:	14 Dec 2006 4:47
Reporter:	Timothy Smith	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Data Types	Severity:	S3 (Non-critical)
Version:	4.1, 5.0, 5.1	OS:	Any (all)
Assigned to:	Ramil Kalimullin	CPU Architecture:	Any

Description:
See bug #19370, which reported this bug but was closed without fixing it, since the manual was not clear regarding this specific case.

The server currently accepts a DATETIME value like '0000-00-00 11:22:33' without any warning or truncation.  It is an invalid value, though, and should be truncated to 0 (0000-00-00 00:00:00) with an associated warning.  In strict mode, it should produce an error.

Documentation should also be updated to use this as an example of an invalid date.  Currently the manual does not mention the case of a 0000-00-00 date portion, but a non-zero time portion, as invalid.

How to repeat:
create table dtzero (dt datetime);
insert into dtzero (dt) values ('0000-00-00 11:22:33');
select * from dtzero;

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/13065

ChangeSet@1.2543, 2006-10-04 16:00:44+05:00, ramil@mysql.com +2 -0
  Fix for bug #21789: DATETIME with 0000-00-00 11:22:33 should be invalid, but is accepted 
  
  Reject '0000-00-00 01:01:01' dates.

I hope this is fixed too:

mysql> select addtime('0000-00-00 00:00:00', '00:00:00');
+--------------------------------------------+
| addtime('0000-00-00 00:00:00', '00:00:00') |
+--------------------------------------------+
| NULL                                       |
+--------------------------------------------+
1 row in set (0.00 sec)

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 bug fix. More information about accessing the source trees is available at

    http://dev.mysql.com/doc/en/installing-source.html

Documented bugfix for 5.0.32 and 5.1.15.