Re: Can I force a query plan to materialise part? - Mailing list pgsql-general

From Ondrej Ivanič
Subject Re: Can I force a query plan to materialise part?
Date
Msg-id CAM6mieKhRdqYBbBWtsPyEpoyB3WT+uurw-Q9v1xXSEmuwKpUVA@mail.gmail.com
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In response to Can I force a query plan to materialise part?  (Toby Corkindale <toby.corkindale@strategicdata.com.au>)
Responses Re: Can I force a query plan to materialise part?  (Toby Corkindale <toby.corkindale@strategicdata.com.au>)
List pgsql-general
Hi,

On 2 October 2012 12:33, Toby Corkindale
<toby.corkindale@strategicdata.com.au> wrote:
> I have a query that joins two views, and takes 28 seconds to run.
> However if I create temporary tables that contain the contents of each view,
> and then join them, the total time is 1.3 seconds.

try "offset 0" (or you can tweak statistics collector to get better estimates):
select ... from (select * from view offset 0) as v ....

http://blog.endpoint.com/2009/04/offset-0-ftw.html

--
Ondrej Ivanic
(ondrej.ivanic@gmail.com)


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