From: | Grzegorz Jaśkiewicz <gryzman(at)gmail(dot)com> |
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To: | Gregory Stark <stark(at)enterprisedb(dot)com> |
Cc: | PostgreSQL <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: funny view/temp table problem with query |
Date: | 2009-02-27 13:01:13 |
Message-ID: | 2f4958ff0902270501h49030e88u6c0dc9e5377e0292@mail.gmail.com |
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Lists: | pgsql-general |
On Fri, Feb 27, 2009 at 11:57 AM, Gregory Stark <stark(at)enterprisedb(dot)com> wrote:
> Uh, we get a lot of really mangled SQL and explain plans -- I don't see
> anything wrong with these. If the question was unclear it sounds like it's
> just because it's a fairly subtle problem and was hard to describe. Needing
> two cracks at describing the problem is pretty much par for the course here.
>
> I haven't tested the query to see what's going on but if the problem is due to
> random() then in 8.4 you could use WITH to guarantee that the subquery is
> executed precisely once and the results reused as-is subsequently.
In that case, actually I need to get a random array of packages that's
different as much as possible for every account-id.
I'll try to create simpler example, with some script that would
generate data for you.
--
GJ
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