| From: | "Alex J(dot) Avriette" <alex(at)posixnap(dot)net> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Chris Campbell <chris(at)bignerdranch(dot)com>, PostgreSQL Bugs List <pgsql-bugs(at)postgresql(dot)org>, Don Marco <mark(at)bignerdranch(dot)com>, Aaron Hillegass <aaron(at)bignerdranch(dot)com> |
| Subject: | Re: Function is called multiple times in subselect |
| Date: | 2004-03-12 10:55:49 |
| Message-ID: | 20040312105548.GQ6396@posixnap.net |
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| Lists: | pgsql-bugs |
On Thu, Mar 11, 2004 at 11:02:21PM -0500, Tom Lane wrote:
> Chris Campbell <chris(at)bignerdranch(dot)com> writes:
> > I don't think this should be happening (PostgreSQL 7.4.1).
>
> Sorry, this isn't a bug. Flattening the subquery is generally desirable
> behavior.
And if you are concerned about the query's cost vs its actual output
(you weren't clear in your original message), there is the 'iscachable'
pragma for functions.
Alex
--
alex(at)posixnap(dot)net
Alex J. Avriette, Unix Systems Gladiator
Liberty in your lifetime: http://www.freestateproject.org/
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