Re: Optimization for updating foreign tables in Postgres FDW

I wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
>> Hmm, I'm worried that may be an API contract violation.

> Indeed it is.  You could get away with it if you check the
> EXEC_FLAG_EXPLAIN_ONLY flag before doing anything with visible
> side-effects, but it's still pretty ugly.

Actually, there's another problem there.  What of UPDATE or DELETE with a
LIMIT clause, which is something that seems to be coming down the pike:
https://commitfest.postgresql.org/action/patch_view?id=1550
        regards, tom lane