Re: setting configuration values inside a stored proc

From: Andres Freund <andres(at)anarazel(dot)de>
To: pgsql-performance(at)postgresql(dot)org
Cc: Samuel Gendler <sgendler(at)ideasculptor(dot)com>
Subject: Re: setting configuration values inside a stored proc
Date: 2011-05-13 08:28:15
Message-ID: 201105131028.15694.andres@anarazel.de
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Hi,

On Friday, May 13, 2011 01:10:19 AM Samuel Gendler wrote:
> I've got a stored proc that constructs some aggregation queries as strings
> and then executes them. I'd like to be able to increase work_mem before
> running those queries. If I set a new value for work_mem within the stored
> proc prior to executing my query string, will that actually have an impact
> on the query or is work_mem basically a constant once the outer statement
> that calls the stored proc has begun? I'd just test, but it will take
> hours for me to grab a copy of production data and import into a new db
> host for testing. I've already started that process, but I'm betting I'll
> have an answer by the time it completes. It's just the difference between
> modifying the application which calls the procs (and doing a full software
> release in order to do so or else waiting a month to go in the next
> release) vs modifying the procs themselves, which requires only db a
> update.
I would suggest doing ALTER FUNCTION blub(blarg) SET work_mem = '512MB';

Andres

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