Re: [HACKERS] postgres_fdw: Add support for INSERT OVERRIDING clause

On Wed, Nov 29, 2017 at 1:53 PM, Michael Paquier
<michael.paquier@gmail.com> wrote:
> On Wed, Nov 29, 2017 at 8:12 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> IIRC, this issue was debated at great length back when we first put
>> in foreign tables, because early drafts of postgres_fdw did what you
>> propose here, and we ran into very nasty problems.  We eventually decided
>> that allowing remotely-determined column defaults was a can of worms we
>> didn't want to open.  I do not think that GENERATED columns really change
>> anything about that.  They certainly don't do anything to resolve the
>> problems we were contending with back then.  (Which I don't recall the
>> details of; you'll need to trawl the archives.  Should be somewhere early
>> in 2013, though, since we implemented that change in commit 50c19fc76.)
>
> So this gives a good reason to do nothing or return an error at
> postgres_fdw level for OVERRIDING?

Moving the patch to next CF as the discussion has not settled yet.
-- 
Michael