On Tue, 2007-01-30 at 02:35 -0800, Joshua D. Drake wrote:
> > Something different than rules?
> > (http://www.postgresql.org/docs/8.2/interactive/rules.html) (They exist for a
> > while, I've just linked the latest released docs...)
> >
> Quite. Rules are not updateable views. Rules are a hacked up way to
> create an updateable view.
I wouldn't go that far. Rules can do things that updatable views can't
do. Sometimes a view can't be updatable because an update to that view
would be ambiguous (as far as the system knows), but you can still use
the well-defined rules system to *tell* the system what you want an
update to mean.
Updatable views provide a subset of the functionality of rules, but they
do it automatically without much effort on the part of the DBA. That's
great, but it won't replace rules.
Regards,
Jeff Davis