From: CZUCZY Gergely <gergely.czuczy@harmless.hu>
To: Michael Monnerie <michael.monnerie@it-management.at>
Cc: pgsql-admin@postgresql.org
Subject: Re: column: on update update?
Date: Wed, 7 May 2008 16:52:26 +0200
Message-ID: <20080507165226.7a49557a@twoflower.in.publishing.hu> (raw)
In-Reply-To: <200805071649.03336@zmi.at>
References: <200805071050.41450@zmi.at>
<396486430805070623p360b8eafp39683a287cdb3cc@mail.gmail.com>
<200805071649.03336@zmi.at>
On Wed, 7 May 2008 16:49:03 +0200
Michael Monnerie <michael.monnerie@it-management.at> wrote:
> > the other option is to add an after update trigger, and manually set
> > lastupdate then.
>
> Would that be correct? I never did it and looked purely into docs:
>
> CREATE FUNCTION awlupdate()
> AS 'UPDATE awl SET lastupdate=CURRENT_TIMESTAMP;'
> LANGUAGE SQL;
>
> CREATE TRIGGER awlupdate AFTER UPDATE ON awl FOR EACH ROW
> EXECUTE PROCEDURE awlupdate();
I'd prefer this version:
CREATE FUNCTION awlupdate RETURNS TRIGGER AS '
BEGIN
NEW.lastupdate = now();
RETURN NEW;
END' LANGUAGE plpgsql;
CREATE TRIGGER... the same.
But both methods are fine. The only thing is, the function must return TRIGGER
AFAIK.
--
Üdvölettel,
Czuczy Gergely
Harmless Digital Bt
mailto: gergely.czuczy@harmless.hu
Tel: +36-30-9702963
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To: pgsql-admin@postgresql.org
Cc: gergely.czuczy@harmless.hu, michael.monnerie@it-management.at
Subject: Re: column: on update update?
In-Reply-To: <20080507165226.7a49557a@twoflower.in.publishing.hu>
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