Mailbox-Line: From rmello@cc.usu.edu  Tue Jul  2 01:25:08 2002
Date: Mon, 1 Jul 2002 23:23:38 -0600
From: Roberto Mello <rmello@cc.usu.edu>
To: Ferenc Engard <engard@all.hu>
Cc: pgsql-sql@postgresql.org
Subject: Re: pl/pgsql capabilities?
Message-ID: <20020702052338.GA28472@cc.usu.edu>
References: <3D1F97A1.B4B25B32@all.hu> <20020701144047.GB23653@cc.usu.edu>
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On Tue, Jul 02, 2002 at 01:37:08AM +0200, Ferenc Engard wrote:
> 
> If I understand well, I can create a cursor for a SELECT statement, and
> return that cursor. Well, it is better than nothing, but I fear it is
> not flexible enogh for me.

Maybe not for the solution you have right now, but you most likely can
rework things a bit to make it work.
 
> Here is an example from an interbase app. I have to declare that this is
> not my program, and I do not know IB, so forgive me if I say silly
> things...
> 
> CREATE PROCEDURE VIEW_1_1 
> (
>   SZEMPONTID INTEGER,
>   PARENT CHAR(10) CHARACTER SET WIN1250,
>   ELNEVEZESTIPUSID INTEGER,
>   RENDSZERKOD CHAR(16) CHARACTER SET WIN1250
> )
...
> The point is not what this proc does (in summary, it gets all the childs
> with their properties of a parent in a tree structure), but it cannot
> gather all the information with just one select, e.g. it gets some data
> from another (nontrivial) stored procedure.
> 
> As I see, that 'suspend' command gives back the actual row (and the
> control) to the caller until it fetches the next row from this proc's
> return value. Do I interpret correct that this stored proc returns a
> cursor with structure described in the 'RETURNS' part, and which is not
> linked to a SELECT statement?
> 
> Can I do something similar in PG? If not now, maybe in the (near)
> future?

Not in the way you currently have, as far as I could understand it. I didn't 
read the procedure very attentively because it's horribly written in all caps, 
and my eyes started scrambling the letters half way through.

-Roberto

-- 
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  Roberto Mello - Computer Science, USU - http://www.brasileiro.net/ 
       http://www.sdl.usu.edu/ - Space Dynamics Lab, Developer    
"Data! I thought you were dead!" "No, Sir. I rebooted."