From: Tom Lane <tgl@sss.pgh.pa.us>
To: Jeff Williams <jeffw@globaldial.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Update timestamp on update
Date: Wed, 12 Oct 2005 21:44:49 -0400
Message-ID: <16305.1129167889@sss.pgh.pa.us> (raw)
In-Reply-To: <434DB482.1000205@globaldial.com>
References: <434DB482.1000205@globaldial.com>
Jeff Williams <jeffw@globaldial.com> writes:
> last_status_change timestamp DEFAULT now()
> What I would like is that whenever the status is changed the
> last_status_change timestamp is updated to the current time.
For this you use an ON UPDATE trigger; rules are not a good way to solve
it. See the documentation about triggers. The first example on this
page does it along with a few other things:
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, jeffw@globaldial.com
Subject: Re: Update timestamp on update
In-Reply-To: <16305.1129167889@sss.pgh.pa.us>
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