Re: Returning multiple Rows from PL/pgSQL-Function

Currently, this is not possible.

It will be possible in 7.2, or with a patch I'm working on...

On Mon, 9 Jul 2001, Alvar Freude wrote:

> Hi,
> 
> I want to create a function (PL/pgSQL), which return multiple rows. But it
> fails -- when Creating the function, I get a notice:
> 
>   NOTICE:  ProcedureCreate: return type 'records' is only a shell
> 
> 
> When executing it, this error:
> 
>   ERROR:  fmgr_info: function 0: cache lookup failed
> 
> 
> How should I do this?
> 
> 
> The function is simple:
> 
>    CREATE FUNCTION foo (timestamp) RETURNS SETOF records AS 
>         '
>         BEGIN
>            RETURN SELECT * FROM table;
>         END;
>         ' LANGUAGE 'plpgsql';
>    
> 
> 
> or, in more detail the exact function:
> 
> 
>    CREATE FUNCTION get_emotions (timestamp) RETURNS SETOF records AS 
>          '
>          DECLARE 
>             start ALIAS FOR $1;
>             end_id int4;
>          BEGIN
>             SELECT emotion_id FROM emotions 
>                              WHERE date <= start 
>                              LIMIT 1 
>                               INTO end_id;
>             RETURN SELECT emotion_id, emotion1, [...]
>                   FROM  emotions 
>                   WHERE emotion_id BETWEEN end_id-3000 AND end_id
>                   ORDER BY date_epoch + full_rating*(3600*12)
>                   LIMIT 300;
>          END;
>          '
>       LANGUAGE 'plpgsql'; 
> 
> 
> 
> Thanx for any help!
> 
> 
> Ciao
>   Alvar
> 
> 
> 
>