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* stored procedures and type of returned result.
@ 2004-08-24 08:39 Patrice OLIVER <oliverp21@free.fr>
0 siblings, 1 reply; 4+ messages in thread
From: Patrice OLIVER @ 2004-08-24 08:39 UTC (permalink / raw)
To: pgsql-sql
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Hello,
I'm new in PostgreSQL. It's very cool.
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;
Is it possible ?
Do i have to return results in an array ?
If yes, how could i do ?
Do you think using plPHP mays help me ?
Regards,
Patrice OLIVER.
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: stored procedures and type of returned result.
@ 2004-08-24 09:26 Richard Huxton <dev@archonet.com>
parent: Patrice OLIVER <oliverp21@free.fr>
0 siblings, 1 reply; 4+ messages in thread
From: Richard Huxton @ 2004-08-24 09:26 UTC (permalink / raw)
To: Patrice OLIVER <oliverp21@free.fr>; +Cc: pgsql-sql
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-functions article on techdocs.
http://techdocs.postgresql.org/guides/SetReturningFunctions
HTH
--
Richard Huxton
Archonet Ltd
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: stored procedures and type of returned result.
@ 2004-08-24 09:56 Philippe Lang <philippe.lang@attiksystem.ch>
0 siblings, 0 replies; 4+ messages in thread
From: Philippe Lang @ 2004-08-24 09:56 UTC (permalink / raw)
To: pgsql-sql
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 searching for?
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-functions article on techdocs.
http://techdocs.postgresql.org/guides/SetReturningFunctions
HTH
--
Richard Huxton
Archonet Ltd
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^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: stored procedures and type of returned result.
@ 2004-08-24 10:41 Richard Huxton <dev@archonet.com>
parent: Richard Huxton <dev@archonet.com>
0 siblings, 0 replies; 4+ messages in thread
From: Richard Huxton @ 2004-08-24 10:41 UTC (permalink / raw)
To: Patrice OLIVER <oliverp21@free.fr>; +Cc: pgsql-sql
Patrice OLIVER wrote:
>
> Hello, I got this error message :
>
> ERROR: set-valued function called in context that cannot accept a set
> CONTEXT: PL/pgSQL function "lsttable" line 5 at return next
You need to treat set-returning functions as though they are tables.
SELECT * FROM lsttable();
NOT
SELECT lsttable();
--
Richard Huxton
Archonet Ltd
^ permalink raw reply [nested|flat] 4+ messages in thread
end of thread, other threads:[~2004-08-24 10:41 UTC | newest]
Thread overview: 4+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2004-08-24 08:39 stored procedures and type of returned result. Patrice OLIVER <oliverp21@free.fr>
2004-08-24 09:26 ` Richard Huxton <dev@archonet.com>
2004-08-24 10:41 ` Richard Huxton <dev@archonet.com>
2004-08-24 09:56 Re: stored procedures and type of returned result. Philippe Lang <philippe.lang@attiksystem.ch>
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