On Fri, Nov 16, 2018 at 01:35:15PM -0500, Tom Lane wrote:
> I wonder whether we'd be better off thinking of a way to let FDWs
> invent additional system column IDs for their tables, so that
> something like a remote table OID could be represented in the
> natural way as a Var with negative varattno. This'd potentially
> also be a win for FDWs whose underlying storage has a row identifier,
> but it's not of type "tid". Instead of trying to shoehorn their
> row ID into SelfItemPointerAttributeNumber, they could define a
> new system column that has a more appropriate data type. Admittedly
> there'd be some infrastructure work to do to make this happen, maybe
> a lot of it; but it's a bullet we really need to bite at some point.
This patch got zero input for the last couple of months. As it is
classified as bug fix, I have moved it to next CF, waiting on author.
Fujita-san, are you planning to look at it?
--
Michael