On ons, 2012-03-14 at 10:27 -0400, Tom Lane wrote:
> That opinion seems to me to connect to the recently-posted patch to
> make contrib/file_fdw enforce NOT NULL constraints. Should we instead
> have the position that constraints declared for foreign tables are
> statements that we can take on faith, and it's the user's fault if
> they are wrong?
We should look into the NOT ENFORCED stuff for constraints in SQL:2011.
Then we can have both, and both for regular and foreign tables.