Re: Trigger/Rules Order of operations

2008/12/15 Ketema Harris <ketema@ketema.net>:
> I am interested in finding out the pros, cons, pitfalls of using the
> following design:
>
> Manual insert into Table A.
> Table A has a BEFORE INSERT trigger that causes an insert to table B.
> Table B has an AFTER INSERT trigger that causes an insert back to table A
> (With different criteria not an endless loop)
>
> Table A will have its Before Trig fire again and this time the criteria
> causes it to finish with a return new.
>
how do you will control that for each insertion on A don't
insert on B when this tuple is just inserted? WHy i do this question?
Becuase you can't put 2 before insert triggers at the same time (you
can but is not cleany)
I mean, if you want to do a 'control' of the inserted data i think is
better a good
trigger that filter data to insert, and if you want a log table make a
rule or in the same
function of the trigger put the logging

> Will the second insert into table A commit before the first insert into
> table A?  What order does the insert into table B finish up?
>
the 2 triggers will execute, i think, at the same time. Just think:
waht are the
beneffits of this implementation? what do you want to resolve with it?

>
> Ketema J. Harris
> www.ketema.net
> ketema@ketema.net
> ketemaj on iChat
>
>
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--
      Emanuel Calvo Franco
Syscope Postgresql Consultant
     ArPUG / AOSUG Member