From: Tom Lane <tgl@sss.pgh.pa.us>
To: Martin Marques <martin@bugs.unl.edu.ar>
Cc: pgsql-sql@postgresql.org
Subject: Re: defaults on updates
Date: Sat, 01 Nov 2003 10:24:49 -0500
Message-ID: <24956.1067700289@sss.pgh.pa.us> (raw)
In-Reply-To: <200311011049.17325.martin@bugs.unl.edu.ar>
References: <200311011049.17325.martin@bugs.unl.edu.ar>
Martin Marques <martin@bugs.unl.edu.ar> writes:
> Basically, I have 5 fields, one being a PK (SERIAL), 3 with information, and
> the last one a timestamp field that will show the last time the register was
> modified (tmodif which has a DEFAULT CURRENT_TIMESTAMP).
> Now, eveytime someone modifys any, or all of the 3 information fields,
> I want the tmodif field of that register to be set to now().
This is trivial to do with a trigger --- you just need something like
NEW.lastmod := now();
RETURN NEW;
There's a complete example at the bottom of this page:
http://developer.postgresql.org/docs/postgres/plpgsql-trigger.html
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, martin@bugs.unl.edu.ar
Subject: Re: defaults on updates
In-Reply-To: <24956.1067700289@sss.pgh.pa.us>
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