Reece Hart wrote: > On Tue, May 20, 2008 at 02:25:15PM -0400, Decibel! wrote: > > I need to add a field to a fairly large table. In the same alter statement > > I'd like to add a FK constraint on that new field. Is there any way to > > avoid the check of the table that the database is doing right now? The > > check is pointless because the newly added field is nothing but NULLs. > > > I don't see the problem. FK constraints don't fire on NULL values. I > think you might be imagining that a problem exists when it doesn't.
The problem is that it does a table scan only to find that all values are NULL, which is pretty pointless. -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
