Re: Alter table to "on update cascade"

On Wed, Nov 17, 2010 at 11:32:32AM -0500, Aram Fingal wrote:
> I have a table where I should have declared a foreign key with ON
> UPDATE CASCADE and didn't.  Now I want to fix that.  From the
> documentation on www.postgresql.org, about ALTER TABLE it's not at
> all clear how to do this or even whether you can do this.

You can do it like this:

BEGIN;
ALTER TABLE foo DROP CONSTRAINT your_constraint;
ALTER TABLE foo ADD FOREIGN KEY ...;
COMMIT;

Cheers,
David.
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