Re: ALTER TABLE ... REPLACE WITH
Simon Riggs <simon@2ndquadrant.com>
From: Simon Riggs <simon@2ndQuadrant.com>
To: Csaba Nagy <ncslists@googlemail.com>
Cc: Robert Haas <robertmhaas@gmail.com>, Josh Berkus <josh@agliodbs.com>, pgsql-hackers@postgresql.org
Date: 2010-12-15T15:50:13Z
Lists: pgsql-hackers
On Wed, 2010-12-15 at 12:17 +0100, Csaba Nagy wrote: > But one problem would be when the replaced table is the _parent_ for a > foreign key relationship. I don't think you can have that constraint > pre-verified on the replacement table and simply replacing the content > could leave the child relations with orphans. Good point. The only sensible way to handle this is by putting the FK checks into check pending state (as discussed on a different thread). We would probably need to disallow FKs with DELETE or UPDATE CASCADE since it would be difficult to execute those. -- Simon Riggs http://www.2ndQuadrant.com/books/ PostgreSQL Development, 24x7 Support, Training and Services