From: Jeff Williams <jeffw@globaldial.com>
To: pgsql-sql@postgresql.org
Subject: Update timestamp on update
Date: Thu, 13 Oct 2005 09:12:34 +0800
Message-ID: <434DB482.1000205@globaldial.com> (raw)
I have a table like:
CREATE TABLE products (
id int,
status int,
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. I have had
a look at the rules and what I want would be similar to:
CREATE RULE last_status_change AS ON UPDATE
TO products WHERE NEW.status <> OLD.status
DO UPDATE products SET last_status_change = now() WHERE id = OLD.id;
Except of course that the above is recursive and doesn't work.
How can I do this?
Jeff
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To: pgsql-sql@postgresql.org
Cc: jeffw@globaldial.com
Subject: Re: Update timestamp on update
In-Reply-To: <434DB482.1000205@globaldial.com>
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