>Assuming that there is a unique identifier on queue
Alas, there is not. The PK is made up of 4 columns.
--
Peter Headland
Architect
Actuate Corporation
-----Original Message-----
From: D'Arcy J.M. Cain [mailto:darcy@druid.net]
Sent: Tuesday, August 11, 2009 03:25
To: Peter Headland
Cc: pgsql-sql@postgresql.org
Subject: Re: [SQL] Updating a specific number of rows in pl/pgsql
On Mon, 10 Aug 2009 17:52:36 -0700
"Peter Headland" <pheadland@actuate.com> wrote:
> I can get the rows I want to update like this:
>
> SELECT *
> FROM queue
> WHERE id = p_queue_id
> ORDER BY rank
> LIMIT p_number_of_items;
>
> Of course, there may not be p_number_of_items available in the queue.
>
> I want to update all the rows in the cursor in the same way:
>
> UPDATE queue SET assigned = TRUE;
Assuming that there is a unique identifier on queue, let's call it
queue_id, you should be able to do something like this:
UPDATE queue SET assigned = TRUE WHERE queue_id IN (SELECT queue_id FROM queue WHERE id = p_queue_id ORDER BY
rank LIMIT p_number_of_items);
--
D'Arcy J.M. Cain <darcy@druid.net> | Democracy is three wolves
http://www.druid.net/darcy/ | and a sheep voting on
+1 416 425 1212 (DoD#0082) (eNTP) | what's for dinner.
