Re: Function error

Am Dienstag, 13. August 2002 08:06 schrieb Sugandha Shah:
> Hi ,
>
> I'm porting MS- SQL stored procedure to postgres . I'm getting this
> error :
>
> Error occurred while executing PL/pgSQL function
> sel_free_disk_space line 7 at SQL statement
> SELECT query has no destination for result data.
> If you want to discard the results, use PERFORM instead.

you need to SELECT INTO if you want to set a varaible in plpgsql

try this:
DECLARE
var_free integer;
-- var_free is used just to name it differently from the column name
BEGIN
SELECT INTO var_free
free from logical_drive where computer_id = $1 and
letter = upper($2);
IF var_free THEN
...

Janning

> CREATE FUNCTION sel_free_disk_space(int4,bpchar) RETURNS integer
> AS ' DECLARE
> -- Declare variable to store the free space.
> free INTEGER;
>
> BEGIN
> select free from logical_drive where computer_id = $1 and
> letter = upper($2);
> IF free IS NULL THEN
> RETURN -1;
> END IF;
>
> RETURN free;
> END;
> 'LANGUAGE 'plpgsql';
>
>
> I'm not able to understand what I'm missing ?
>
> Secondly is there any equivalent of exec for postgres ?
>
> Any help will be highly appreciated.
>
> Regards,
> -Sugandha

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