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Re: How do you control IMMUTABLE PG PROC results? - Mailing list pgsql-general

From hubert depesz lubaczewski
Subject Re: How do you control IMMUTABLE PG PROC results?
Date
Msg-id 20101105055852.GA3767@depesz.com
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In response to How do you control IMMUTABLE PG PROC results?  ("Carlo Stonebanks" <stonec.register@sympatico.ca>)
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On Thu, Nov 04, 2010 at 08:24:14PM -0400, Carlo Stonebanks wrote:
> We have procs that would benefit from returning IMMUTABLE results.
> The procs are dependent on external tables that rarely change, but
> when they DO change, it would be great if we could expire the cache
> that the procs read from so that the procs are forced to re-evaluate
> the results.
>
> Is this possible?
>
> How do I know how many possible results are cached?

in addition to what Leif responded, please note that immutable functions
*do not* cache results.

depesz

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