From: | David Fetter <david(at)fetter(dot)org> |
---|---|
To: | "Raymond C(dot) Rodgers" <sinful622(at)gmail(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Table update problem works on MySQL but not Postgres |
Date: | 2010-09-01 00:09:40 |
Message-ID: | 20100901000940.GA3420@fetter.org |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
On Tue, Aug 31, 2010 at 07:56:23PM -0400, Raymond C. Rodgers wrote:
> Let me stress that this is not a bug in PostgreSQL; if anything at
> all, it's only a lack of a stupid feature.
PostgreSQL's version involves UPDATE ... FROM. Use an ORDER BY in the
FROM clause like this:
UPDATE mydemo SET cat_order = m.cat_order+1
FROM (
SELECT cat_order, client_id
FROM mydemo
WHERE
client_id = 1 AND
cat_order >= 0
ORDER BY cat_order) m
WHERE
mydemo.cat_order = m.cat_order AND
mydemo.client_id = m.client_id
More details on PostgreSQL's UPDATE are at:
http://www.postgresql.org/docs/current/static/sql-update.html
Cheers,
David.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
Skype: davidfetter XMPP: david(dot)fetter(at)gmail(dot)com
iCal: webcal://www.tripit.com/feed/ical/people/david74/tripit.ics
Remember to vote!
Consider donating to Postgres: http://www.postgresql.org/about/donate
From | Date | Subject | |
---|---|---|---|
Next Message | Merlin Moncure | 2010-09-01 00:17:31 | Re: Table update problem works on MySQL but not Postgres |
Previous Message | Scott Marlowe | 2010-09-01 00:08:19 | Re: On-disk size of db increased after restore |