Обсуждение: Re: [GENERAL] Adding ON UPDATE CASCADE to an existing foreign key

Moving to -hackers...

On Thu, May 04, 2006 at 09:17:31AM -0700, Stephan Szabo wrote:
> On Thu, 4 May 2006, Rich Doughty wrote:
> 
> > I have a foreign key constraint that I'd like to alter. I'd rather not
> > drop and re-create it due to the size of the table involved. All I need
> > to do is add an ON UPDATE CASCADE.
> >
> > Is it ok to set confupdtype to 'c' in pg_constraint (and will this be
> > all that's needed) or is it safer to drop and recreate the constraint?
> 
> I don't think that's going to work, you'd probably need to change the
> function associated with the trigger involved too.  It's probably safer to
> do the drop and create.

It would be nice if there was a way to do this that didn't involve
re-validating all the data. Can this be added as a TODO?
-- 
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
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