From: Michele Petrazzo - Unipex srl <michele.petrazzo@unipex.it>
To: Pgsql-Sql <pgsql-sql@postgresql.org>
Subject: functions are returns columns
Date: Fri, 09 Nov 2007 20:46:41 +0100
Message-ID: <4734B921.5050704@unipex.it> (raw)
Hi all.
I want that a function return a table rows (like the doc says at 33.4.4.
SQL Functions as Table Sources), but I want the a function return only a
few cols, so the same that I select into the func.
Modifying the doc example:
CREATE TABLE foo (fooid int, foosubid int, fooname text);
INSERT INTO foo VALUES (1, 1, 'Joe');
INSERT INTO foo VALUES (1, 2, 'Ed');
INSERT INTO foo VALUES (2, 1, 'Mary');
CREATE FUNCTION getfoo(int) RETURNS foo AS $$
SELECT fooid, foosubid FROM foo WHERE fooid = $1;
$$ LANGUAGE SQL;
This give me an error:
ERROR: return type mismatch in function declared to return foo
DETAIL: Final SELECT returns too few columns.
CONTEXT: SQL function "getfoo"
So, how do it?
Thanks,
Michele
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Subject: Re: functions are returns columns
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