From: Jeff Herrin <jeff@alternateimage.com>
To: Andreas Kretschmer <akretschmer@spamfence.net>
Cc: pgsql-sql@postgresql.org
Subject: Re: consistent random order
Date: Wed, 29 Nov 2006 12:32:56 -0500 (EST)
Message-ID: <25133466.59111164821576601.JavaMail.root@srv161.carpathiahost.net> (raw)
In-Reply-To: <20061129172742.GA9005@KanotixBox>
I don't think cursors are going to help in this case. The order by random() is still going to give different result sets on different pages.
Jeff
----- Original Message -----
From: Andreas Kretschmer <akretschmer@spamfence.net>
To: pgsql-sql@postgresql.org
Sent: Wednesday, November 29, 2006 12:27:42 PM GMT-0500 US/Eastern
Subject: Re: [SQL] consistent random order
Jeff Herrin <jeff@alternateimage.com> schrieb:
> I am returning results ordered randomly using 'order by random()'. My issue has
> to do with page numbers in our web application. When I hit the 2nd page and
> retrieve results with an offset, ordering by random() isn't really what I want
> since I will often receive results that were on the 1st page (they get re-
> randomized).
>
> I'm looking for a way to order in a controled random order. Maybe a UDF.
I think you are searching for CURSORs.
18:25 < akretschmer> ??cursor
18:25 < rtfm_please> For information about cursor
18:25 < rtfm_please> see http://www.postgresql.org/docs/current/static/plpgsql-cursors.html
18:25 < rtfm_please> or http://www.postgresql.org/docs/current/static/sql-declare.html
With a CURSOR, you get one result-set and can walk through this result.
Andreas
--
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To: pgsql-sql@postgresql.org
Cc: jeff@alternateimage.com, akretschmer@spamfence.net
Subject: Re: consistent random order
In-Reply-To: <25133466.59111164821576601.JavaMail.root@srv161.carpathiahost.net>
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