Re: Can I force a query plan to materialise part?

From: David Johnston <polobo(at)yahoo(dot)com>
To: Toby Corkindale <toby(dot)corkindale(at)strategicdata(dot)com(dot)au>
Cc: pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: Re: Can I force a query plan to materialise part?
Date: 2012-10-02 02:44:29
Message-ID: 9D2A94AF-9495-43D9-A736-3CD68C54F967@yahoo.com
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On Oct 1, 2012, at 22:33, Toby Corkindale <toby(dot)corkindale(at)strategicdata(dot)com(dot)au> wrote:

> Hi,
> Is there any way to force the query planner to do a materialisation stage?
>
> 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.
>
> Is there a way to hint to the query planner that it should be taking that approach?
>
> Thanks,
> Toby
>
>

Have you tried?

With v1 as (), v2 as () select v1 join v2

David J.

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