Re: column: on update update?

On Mittwoch, 7. Mai 2008 Richard Broersma wrote:
> Well you have two options.  The perferred method would be to have
> your application include an update to your lastupdate field whenever
> anyother rows are updated.

But as we speak about SpamAssassin, an external project, I do not want
to patch every new version that comes out. Maybe they include it once,
but it isn't currently so I need the db do it.

> the other option is to add an after update trigger, and manually set
> lastupdate then.

Would that be correct? I never did it and looked purely into docs:

CREATE FUNCTION awlupdate()
AS 'UPDATE awl SET lastupdate=CURRENT_TIMESTAMP;'
LANGUAGE SQL;

CREATE TRIGGER awlupdate AFTER UPDATE ON awl FOR EACH ROW
EXECUTE PROCEDURE awlupdate();

mfg zmi
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