Re: Missing importing option of postgres_fdw

On 2015/04/30 2:10, Robert Haas wrote:
> On Mon, Apr 27, 2015 at 7:47 AM, Michael Paquier
> <michael.paquier@gmail.com> wrote:
>> Authorizing ALTER FOREIGN TABLE as query string that a FDW can use
>> with IMPORT FOREIGN SCHEMA is a different feature than what is
>> proposed in this patch, aka an option for postgres_fdw and meritates a
>> discussion on its own because it impacts all the FDWs and not only
>> postgres_fdw. Now, related to this patch, we could live without
>> authorizing ALTER FOREIGN TABLE because CREATE FOREIGN TABLE does
>> authorize the definition of CHECK constraints.
>
> I agree.  I don't think there's a huge problem with allowing IMPORT
> FOREIGN SCHEMA to return ALTER FOREIGN TABLE statements, but it
> doesn't really seem to be necessary.  I don't see why we can't just
> declare the CHECK constraints in the CREATE FOREIGN TABLE statement
> instead of adding more DDL.

I think that it'd improve the convenience of an FDW developer writing 
ImportForeignSchema() to allow it to return ALTER FOREIGN TABLE (and 
perhaps DROP FOREIGN TABLE) as well, but I agree that that needs another 
discussion.  So I'll leave that as is and update the patch as discussed 
above.

Thanks for the comments!

Best regards,
Etsuro Fujita