Date: Sat, 13 Nov 2010 15:48:02 -0800 (PST)
From: berelith <nicolasbeuzeboc@gmail.com>
To: pgsql-sql@postgresql.org
Message-ID: <1289692082542-3264047.post@n5.nabble.com>
Subject: Need help with plpgsql function.
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit


Hi,

I'm creating the function on a postgres 8.2 server.
I would like the function to accept half a dozen varied parameters (varchars
and timestamps).
The first parameter will determine which one of the 6 different select
queries that function is going to run.

The function will return all the rows from the chosen select statement.

I've been reading the postgresql documentation in creating functions that
returns rowset and I've read about  plpgsql. It seems to be what I need
because there is going to be conditional statements.

I'm just having a hard time putting it all together, and I'm not sure about
the syntax and how to return the selected rows back into OUT parameters.

This is a short pseudo example:

CREATE OR REPLACE FUNCTION report (
-- function arguments, type will determine which one of the 6 queries to run
  IN type       character varying(20),
  IN param1   character varying(255),
  IN param2   timestamp,
-- returned values
  OUT code          table.code%TYPE,
  OUT name         table.name%TYPE
)
RETURNS SETOF rows
{ LANGUAGE PLPGSQL
IF type like 'type A' THEN
    SELECT code, name INTO rows FROM tableA join some table ....;
    return rows
ELSIF type like 'type B' THEN
    SELECT code, name INTO rows FROM tableB join someothertable ... ;
    return rows
ELSE
    RETURN VOID
END IF;
}


-- 
View this message in context: http://postgresql.1045698.n5.nabble.com/Need-help-with-plpgsql-function-tp3264047p3264047.html
Sent from the PostgreSQL - sql mailing list archive at Nabble.com.