Re: postgresql function not accepting null values inselect statement

On Friday 22 February 2008 01:35:47 am Bart Degryse wrote:
> Can you try this...
>
> CREATE OR REPLACE FUNCTION getfunctionaries(p_statecd integer)
> RETURNS SETOF t_functionaries AS
> $BODY$
> DECLARE
> rec t_functionaries%ROWTYPE;
> BEGIN
> FOR rec IN (
> SELECT f.functionaryid, f.category, f.description
> FROM functionaries f
> WHERE f.statecd IS NOT DISTINCT FROM p_statecd)
> LOOP
> return next rec;
> END LOOP;
> return;
> END;
> $BODY$
> LANGUAGE 'plpgsql' VOLATILE;
>
a newbie question. Could you explain why yours works? I don't understand how
it works if p_statecd = NULL

--
John Fabiani