Hi,
alles klar, hab kürzlich die Lösung gefunden:
---------------------------------------------
WHEN (PRISTW is not NULL and PRSOLLW is not NULL)
BEGIN
CASE
WHEN PRISTW - PRSOLLW > 0
THEN SET newrow.PRABWEI = 'Entspricht';
ELSE
SET newrow.PRABWEI = 'Entspricht nicht';
END CASE;
END
---------------------------------------------

Ciao,
Jürgen