I'm (still) trying to transition out from under the uniqueidentifier contrib module to the native uuid datatype. I seem to be able to create a domain for uniqueidentifier:
CREATE DOMAIN public.uniqueidentifier AS uuid; and then use pg_restore to reload my data without the contrib module. I'd like for my final step to be to ALTER TABLE foo ALTER COLUMN my_uuid TYPE uuid; ... Is PostgreSQL smart enough to not have to rewrite the table and simply shed the domain for the underlying datatype?
