Re: adding on delete cascade constraint?

On Fri, 2003-09-19 at 14:02, Jean-Christian Imbeault wrote:
> Oliver Elphick wrote:
>
> >>Foreign Key constraints: $1 FOREIGN KEY (pid) REFERENCES products(id) ON
> >>UPDATE NO ACTION ON DELETE NO ACTION
> >
> > Drop the constraint; then add an amended one.
>
> Ok, how do I drop the constraint, it has no name.

>From what you quoted above, its name is $1

ALTER TABLE xxx DROP CONSTRAINT "$1"; -- double quotes required since
-- $1 is an identifier

> Secondly what is the correct syntax for adding a new constraint with ON
> DELETE CASCADE?

ALTER TABLE xxx ADD CONSTRAINT "$1" FOREIGN KEY (pid) REFERENCES
products(id) ON UPDATE NO ACTION ON DELETE CASCADE;

--
Oliver Elphick Oliver(dot)Elphick(at)lfix(dot)co(dot)uk
Isle of Wight, UK http://www.lfix.co.uk/oliver
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