Re: [SQL] OFFSET impact on Performance???

> If you're using this to provide "pages" of results, could you use a
> cursor?
What do you mean by that? Cursor?

Yes I'm using this to provide "pages", but If I jump to the last pages it
goes very slow.

Andy.

----- Original Message -----
From: "Richard Huxton" <dev@archonet.com>
To: "Andrei Bintintan" <klodoma@ar-sd.net>
Cc: <pgsql-sql@postgresql.org>; <pgsql-performance@postgresql.org>
Sent: Thursday, January 20, 2005 2:10 PM
Subject: Re: [SQL] OFFSET impact on Performance???


> Andrei Bintintan wrote:
>> Hi to all,
>>
>> I have the following 2 examples. Now, regarding on the offset if it
>> is small(10) or big(>50000) what is the impact on the performance of
>> the query?? I noticed that if I return more data's(columns) or if I
>> make more joins then the query runs even slower if the OFFSET is
>> bigger. How can I somehow improve the performance on this?
>
> There's really only one way to do an offset of 1000 and that's to fetch
> 1000 rows and then some and discard the first 1000.
>
> If you're using this to provide "pages" of results, could you use a
> cursor?
>
> --
>   Richard Huxton
>   Archonet Ltd
>