Обсуждение: ON DELETE Behavior after the fact

I have a database in production that requires some ON DELETE behavior.  Is
there a way to use ALTER TABLE to define ON DELETE behavior for the foreign
keys, or will I have to write triggers at this point?
_______________________________________
John Pagakis
DevelopOnline.com

On Fri, 27 Apr 2001, John Pagakis wrote:

> I have a database in production that requires some ON DELETE behavior.  Is
> there a way to use ALTER TABLE to define ON DELETE behavior for the foreign
> keys, or will I have to write triggers at this point?

The easiest thing is probably to drop the triggers for the foreign key
constraint you want to change, and re-add the constraint using ALTER
TABLE specifying the on delete behavior.

John Pagakis <John.Pagakis@DevelopOnline.com> wrote:
>I have a database in production that requires some ON DELETE behavior.  Is
>there a way to use ALTER TABLE to define ON DELETE behavior for the foreign
>keys, or will I have to write triggers at this point?

Have you looked at
http://techdocs.postgresql.org/techdocs/hackingreferentialintegrity.html ?

HTH,
Ray
--
USDoJ/Judge Jackson: "Microsoft has performed an illegal operation and will
be shut down."
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