Ross J. Reedstrom wrote:
> An important thing to remember about rules vs. triggers: Rules operate
> on an SQL _query_ that involves the table (or view) that the rule is
> attached to, whereas triggers operate on the individual _tuples_ of the
> table they are attached to. Rules act to rewrite the incoming query,
> at the very earliest step: just after parsing, but before planning and
> optimizing. So rules _always_ act first. Triggers act when storage gets
> hit: when the optimizer has choosen a plan, and passes it to the executor
> for, well, execution.
>
> Ross
Thanks alot, again I understand a little bit more.
You're great, guys!
Regards, Michael Paesold
