Re: Best approach for a "gap-less" sequence - Mailing list pgsql-general

On 8/16/06, Dawid Kuroczko <qnex42@gmail.com> wrote:
> -- then create a function to retrieve the values:
> CREATE FUNCTION gseq_nextval(t text) RETURNS integer AS $$
>     DECLARE
>        n integer;
>     BEGIN
>        SELECT INTO n gseq_value+1 FROM gapless_seq WHERE gseq_name = t
> FOR UPDATE;
>        UPDATE gapless_seq SET gapless_value = n WHERE gseq_name = t;
>        RETURN n;
>     END;
> $$ STABLE LANGUAGE PLpgsql;
       ^^^^^^^^^^^
VOLATILE of course!


Regards,
   Dawid