From: Torsten Zühlsdorff <foo@meisterderspiele.de>
To: pgsql-sql@postgresql.org
Subject: Re: [TRIGGER] Returning values from BEFORE UPDATE trigger, without using them
Date: Wed, 28 Jul 2010 08:45:02 +0200
Message-ID: <i2ojle$kcd$1@news.eternal-september.org> (raw)
In-Reply-To: <13845.1280263824@sss.pgh.pa.us>
References: <i2c3bp$v3l$1@news.eternal-september.org>
<13845.1280263824@sss.pgh.pa.us>
Tom Lane schrieb:
> =?ISO-8859-15?Q?Torsten_Z=FChlsdorff?= <foo@meisterderspiele.de> writes:
>> I have defined an BEFORE UPDATE trigger. The trigger catch every update,
>> change some columns of the new row, make an insert of the new row and
>> returns null to abort the update.
>
> Why in the world would you do that? Just return the modified row from
> the trigger and let the update proceed normally.
Because of content-revision. I have a lot of text which is modified and
created from multiple persons. The requierment is, that i need every
version of every content (+ their meta-data).
And i don't need just a log, which lists the changes. The different
revisions of *one* content are used at the *same* time at *different*
parts of the website. Therefore i rewrite every UPDATE to an INSERT. And
except of the missing returning everything works fine and fast. :)
Greetings,
Torsten
--
http://www.dddbl.de - ein Datenbank-Layer, der die Arbeit mit 8
verschiedenen Datenbanksystemen abstrahiert,
Queries von Applikationen trennt und automatisch die Query-Ergebnisse
auswerten kann.
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Cc: foo@meisterderspiele.de
Subject: Re: [TRIGGER] Returning values from BEFORE UPDATE trigger, without using them
In-Reply-To: <i2ojle$kcd$1@news.eternal-september.org>
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