El Jue 15 Abr 2004 08:55, Sebastian Böck escribió:
> Hello,
>
> is there a simple operator to determine whether the OLD.value and
> NEW.value are different. The <> operator is not working on NULL's.
>
> I need something like this:
> NEW.val <> Old.val OR
> NEW.val IS NULL AND OLD.val IS NOT NULL OR
> NEW.val IS NOT NULL AND OLD.val IS NULL
(NEW.val <> Old.val) OR
(NEW.val IS NULL AND OLD.val IS NOT NULL) OR
(NEW.val IS NOT NULL AND OLD.val IS NULL)
You forgot the parenthesis, to group the conditions accordingly
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Martín Marqués | select 'mmarques' || '@' || 'unl.edu.ar'
Centro de Telematica | DBA, Programador, Administrador
Universidad Nacional
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