Re: stored procedures and type of returned result.

Patrice,

You might have a look at "views" as well. That's not strictily speaking a stored procedure, but maybe it's what you are
searchingfor? 

Philippe Lang

-----Message d'origine-----
De : pgsql-sql-owner@postgresql.org [mailto:pgsql-sql-owner@postgresql.org] De la part de Richard Huxton
Envoyé : mardi, 24. août 2004 11:26
À : Patrice OLIVER
Cc : pgsql-sql@postgresql.org
Objet : Re: [SQL] stored procedures and type of returned result.

Patrice OLIVER wrote:
> Hello,
>
> I'm new in PostgreSQL. It's very cool.

Hello, and yes it is isn't it :-)

> I would like to know how to return a set of records from a stored
> procedure.
>
> For example, i would like to execute these sql command from a stored
> procedure :
>
> select t.typnum, t.typcom, t.typcateg, s.symurlgraph from structure.type t
>   left join structure.symbole s
>   on t.typcode = s.typcode;

Broadly speaking you'll want something like:

CREATE TYPE my_return_type AS (  a  integer,  b  text
);

CREATE FUNCTION my_function(integer) RETURNS SETOF my_return_type AS '  SELECT foo_a, foo_b FROM foo WHERE foo_c = $1;
'LANGUAGE SQL; 

You don't need to define your own type if you want to return the same columns as a table, you can use the table-name
instead.

For more complex cases where you need procedural code, you probably want to read Stephan Szabo's
set-returning-functionsarticle on techdocs.  http://techdocs.postgresql.org/guides/SetReturningFunctions 

HTH
--   Richard Huxton  Archonet Ltd

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