On 2016/11/03 23:39, Robert Haas wrote:
On Wed, Oct 26, 2016 at 3:18 PM, Tom Lane <t...@sss.pgh.pa.us> wrote:
A larger issue is that I think the API itself is poorly designed, as
I stated awhile ago (<31706.1457547...@sss.pgh.pa.us>)

I agree on that point. I plan to rewrite direct modify using upper planner path-ification; I think we would no longer need the planner API PlanDirectModify, but I expect the executor/explain APIs (ie, BeginDirectModify, IterateDirectModify, EndDirectModify, and ExplainDirectModify) would be still useful after that rewrite. Before that, however, I'd like to work on extend postgres_fdw so as to handle more cases such as UPDATE/DELETE on a join and INSERT, with the existing API.

I'd really be quite happy to see you take a more active hand
in the FDW discussions; clearly, you've got a lot of understanding of
that area that is pretty much unique to you.  I'd even support an
effort to rewrite the work that has already been done in a form more
to your liking, but I think you'd need to actually pay attention to
the threads on a somewhat regular basis in order that to be practical.


Best regards,
Etsuro Fujita

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