From: Pavel Stehule <pavel.stehule@gmail.com>
To: Michele Petrazzo - Unipex srl <michele.petrazzo@unipex.it>
Cc: Pgsql-Sql <pgsql-sql@postgresql.org>
Subject: Re: functions are returns columns
Date: Fri, 9 Nov 2007 21:35:20 +0100
Message-ID: <162867790711091235i7e77abcch27731d91285949b6@mail.gmail.com> (raw)
In-Reply-To: <4734B921.5050704@unipex.it>
References: <4734B921.5050704@unipex.it>
On 09/11/2007, Michele Petrazzo - Unipex srl <michele.petrazzo@unipex.it> wrote:
> 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"
>
>
CREATE FUNCTION getfoo(int) RETURNS foo AS $$
SELECT fooid, foosubid FROM foo WHERE fooid = $1 LIMIT 1;
$$ LANGUAGE SQL;
or
CREATE FUNCTION getfoo(int) RETURNS SETOF foo AS $$
SELECT fooid, foosubid FROM foo WHERE fooid = $1;
$$ LANGUAGE SQL;
try:
SELECT * FROM getfoo(1);
Regards
Pavel Stehule
> So, how do it?
>
> Thanks,
> Michele
>
> ---------------------------(end of broadcast)---------------------------
> TIP 5: don't forget to increase your free space map settings
>
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: pavel.stehule@gmail.com, michele.petrazzo@unipex.it
Subject: Re: functions are returns columns
In-Reply-To: <162867790711091235i7e77abcch27731d91285949b6@mail.gmail.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox