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Subject: SQL stored function inserting and returning data in a row.
Date: Thu, 10 Jan 2008 22:23:20 -0500
Message-ID: <1E293D3FF63A3740B10AD5AAD88535D206F416D1@UBIMAIL1.ubisoft.org>
Thread-Topic: SQL stored function inserting and returning data in a row.
Thread-Index: AchUAVC7/xR9p7UoSEyCed5/XhIjwQ==
From: "Daniel Caune" <daniel.caune@ubisoft.com>
To: <pgsql-sql@postgresql.org>

Hi,

Is there any way to define a SQL stored function that inserts a row in a
table and returns the serial generated?

CREATE TABLE matchmaking_session
(
  session_id bigint NOT NULL DEFAULT
nextval('seq_matchmaking_session_id'),
  ...
);

CREATE FUNCTION create_matchmaking_sesssion(...)
  RETURNS bigint
AS $$
  INSERT INTO matchmaking_session(...)
    VALUES (...)
    RETURNING session_id;
$$ LANGUAGE SQL;
=20
2008-01-10 22:08:48 EST ERROR:  return type mismatch in function
declared to return bigint
2008-01-10 22:08:48 EST DETAIL:  Function's final statement must be a
SELECT.
2008-01-10 22:08:48 EST CONTEXT:  SQL function
"create_matchmaking_sesssion"

I can easily convert this code into a PL/pgSQL function, but I'm
thinking that pure SQL is more natural (and faster?) for such a stored
function.

Regards,

--
Daniel