Re: Trigger with conditional predicates

> > PostgreSQL doesn't have an exact equivalent.  Typically, the OLD and NEW values are compared and then action is
takenbased on that.  For example, in PL/pgSQL:
 
> > IF NEW.is_canceled IS NOT DISTINCT FROM OLD.is_canceled THEN
> > NEW.is_canceled := etc etc ;
> > ENDIF;
> > There's currently no way to detect if the column was simply not mentioned at all in the UPDATE statement.
>
> That's not completely true: you can make the whole trigger firing
> dependent on that, by writing something like
>
> CREATE TRIGGER tgname BEFORE UPDATE OF column_name [, ... ] ON table ...
>
> and then the trigger won't fire if the column is not mentioned.

Well, this works if I've something like

  IF UPDATING(...) THEN

But since I've

  IF NOT UPDATING(...) THEN

This isn't working. Or am I missing something?

BR
Dirk


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