From: Greg Stark <gsstark@mit.edu>
To: Christoph Haller <ch@rodos.fzk.de>
Cc: pgsql-sql@postgresql.org
Cc: fernando@icreativa.com.mx
Cc: gsstark@MIT.EDU
Subject: Re: SETOF
Date: 05 Mar 2003 08:36:29 -0500
Message-ID: <87u1ei7x5u.fsf@stark.dyndns.tv> (raw)
In-Reply-To: <3E65F78E.7455651B@rodos.fzk.de>
References: <3E65F78E.7455651B@rodos.fzk.de>
Christoph Haller <ch@rodos.fzk.de> writes:
> >
> >
> > Christoph Haller <ch@rodos.fzk.de> writes:
> >
> > > You cannot obtain several columns from SQL functions.
> > > See the list archives (search for SETOF) for details.
> > > You have to use e.g. a plpgsql function instead.
> >
> > How do you do it with a plpgsql function?
>
> And Greg, refer to
> http://techdocs.postgresql.org/guides/SetReturningFunctions
>
> I think it will fit your needs.
That document describes using the function in the from list of the select.
That's equivalent to converting the query to a join, which isn't always
possible or convenient. I was talking about using a subquery or function in
the output column list to produce multiple output columns.
I'm sorry I may have muddied the waters in that it sounds like my comment
wasn't about exactly the same issue as Chistoph's.
--
greg
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To: pgsql-sql@postgresql.org
Cc: gsstark@mit.edu, ch@rodos.fzk.de, fernando@icreativa.com.mx
Subject: Re: SETOF
In-Reply-To: <87u1ei7x5u.fsf@stark.dyndns.tv>
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