Re: Rule updates and PQcmdstatus() issue
От | Rod Taylor |
---|---|
Тема | Re: Rule updates and PQcmdstatus() issue |
Дата | |
Msg-id | 1031624432.51452.4.camel@jester обсуждение исходный текст |
Ответ на | Re: Rule updates and PQcmdstatus() issue (Bruce Momjian <pgman@candle.pha.pa.us>) |
Список | pgsql-hackers |
On Mon, 2002-09-09 at 22:11, Bruce Momjian wrote: > Jan Wieck wrote: > > We should surely keep this on a much more technical level and avoid any > > personal offendings. To do so, please explain to me why you think that > > triggers and constraints are out of focus here? What is the difference > > between a trigger, a rule and an instead rule from a business process > > oriented point of view? I think there is none at all. They are just > > different techniques to do one and the same, implement business logic in > > the database system. > > All the problems here are coming from INSTEAD rules. We don't have > INSTEAD triggers or contraints. Well.. Triggers could be exclusively INSTEAD. A trigger could easily write a few things to a number of other tables, and return NULL in a BEFORE trigger which would prevent execution of the requested command. -- Rod Taylor
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