| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Jeff Williams <jeffw(at)globaldial(dot)com> |
| Cc: | pgsql-sql(at)postgresql(dot)org |
| Subject: | Re: Update timestamp on update |
| Date: | 2005-10-13 01:44:49 |
| Message-ID: | 16305.1129167889@sss.pgh.pa.us |
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| Lists: | pgsql-docs pgsql-sql |
Jeff Williams <jeffw(at)globaldial(dot)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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