| From: | Scott Marlowe <smarlowe(at)g2switchworks(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Clodoaldo Pinto <clodoaldo(dot)pinto(at)gmail(dot)com>, "pgsql-general postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Calling the same function more than once with the |
| Date: | 2006-04-20 14:11:59 |
| Message-ID: | 1145542319.23538.127.camel@state.g2switchworks.com |
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| Thread: | |
| Lists: | pgsql-general |
On Wed, 2006-04-19 at 18:23, Tom Lane wrote:
> "Clodoaldo Pinto" <clodoaldo(dot)pinto(at)gmail(dot)com> writes:
> > I'm building a function caller() in which a certain function called()
> > will be called many times in from clauses with the same arguments and
> > I'm wondering if is there a performance penalty for that or if the sql
> > engine is smart enough to call called() only once.
>
> No, it isn't.
HOWEVER, depending on how you declare the function, you should be able
to index it.
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