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From: "Caroline M. Paxson" <paxson@postgres.Berkeley.EDU>
Subject: Re: Postgres syntax question
To: postgres@postgres.berkeley.edu
Sender: pg_adm@postgres.berkeley.edu
Date: Tue, 20 Jul 1993 17:42:53 -0700
From: "Caroline M. Paxson" <paxson@postgres.Berkeley.EDU>


Your question:

>I want to define a C function F that takes several tuples from A, B,
>and C, as arguments and returns a set of values.

This is a reasonable thing to want to do, but you can't do it in Postgres
(yet).  C functions must return single things, not sets.  We are
considering implementing this in the near future, but sorry, no promises.


Carol Paxson
Postgres Group, UC Berkeley