Hello.
> As a sidenote - shouldn't MySQL raise an error when data gets >truncated?
MySQL raises a warning after such ALTER operation. See:
mysql> create table dt(a decimal(4,1));
Query OK, 0 rows affected (0.01 sec)
mysql> insert into dt set a=999.1;
Query OK, 1 row affected (0.00 sec)
mysql> alter table dt change a a decimal(2,1);
Query OK, 1 row affected, 1 warning (0.02 sec)
Records: 1 Duplicates: 0 Warnings: 1
mysql> show warnings;
+---------+------+-----------------------------------------------------+
| Level | Code | Message |
+---------+------+-----------------------------------------------------+
| Warning | 1264 | Out of range value adjusted for column 'a' at row 1 |
+---------+------+-----------------------------------------------------+
mysql> select version();
+---------------------+
| version() |
+---------------------+
| 5.0.13-rc-debug-log |
+---------------------+
Martijn Tonies wrote:
>
> As a sidenote - shouldn't MySQL raise an error when data gets truncated?
>
> If the truncation happens silently, chances are you'll never find out until
> someone does a report or whatever?!
>
> With regards,
>
> Martijn Tonies
> Database Workbench - tool for InterBase, Firebird, MySQL, Oracle & MS SQL
> Server
> Upscene Productions
> http://www.upscene.com
> Database development questions? Check the forum!
> http://www.databasedevelopmentforum.com
>
>
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