MySQL-dump - Strangeness

sysdate() weirdness

kris@koehntopp.de (Kristian Köhntopp) — Fri, 25 Nov 2005 17:30:00 +0100

The behaviour of SYSDATE() has changed between MySQL 4.1 and 5.0. The manual indicates:

Within a stored routine or trigger, SYSDATE() returns the time at which it executes, not the time at which the routine or triggering statement began to execute. This differs from the behavior for NOW().

Obviously, this was implemented internally by having SYSDATE() ignore SET TIMESTAMP, as can be easily tested.

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Test your backups

bernd-05@eckenfels.net (Bernd Eckenfels) — Fri, 05 Aug 2005 00:37:16 +0200

Today I had to migrate the mysql database of our BugZilla Installation from an old Server to a new installation. I discovered, that obviously nobody had exercised the restoring process in quite some time, because it aborted:

#1062 - Duplicate entry '223' for key 1

The problem was caused by the 'profiles' table of BugZilla, where all users are stored.
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AUTO_INCREMENT Trivia

kris@koehntopp.de (Kristian Köhntopp) — Wed, 03 Aug 2005 08:06:37 +0200

MySQL (MyISAM) exhibits strange and little known (but documente) behaviour when dealing with compound keys where a part of the compound is AUTO\_INCREMENT.

This is as everybody knows:

mysql> create table standard ( name varchar(20), i integer not null auto_increment primary key ); Query OK, 0 rows affected (0.18 sec) mysql> insert into standard ( name ) values ( "kris" ), ("azundris"), ("kris"), ("azundris"); Query OK, 4 rows affected (0.00 sec) Records: 4 Duplicates: 0 Warnings: 0 mysql> select * from standard; +----------+---+ | name | i | +----------+---+ | kris | 1 | | azundris | 2 | | kris | 3 | | azundris | 4 | +----------+---+ 4 rows in set (0.00 sec)

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Cluster FAQ

www@azundris.com (Azundris) — Mon, 01 Aug 2005 17:58:00 +0200

Seeing the MySQL cluster FAQ always puts a smile on my face.
Little things amuse little minds, I guess.

Oy vey!

www@azundris.com (Azundris) — Wed, 27 Jul 2005 17:24:00 +0200

Innobase, Oy!
Apparently, Oy is Finnish for Ltd. — ah, the possibilities are endless!