Re: [HACKERS] [BUGS] BUG #14759: insert into foreign data partitions fail

> I'm curious what the other limitations are...

When I first wrote that documentation line (I am assuming you're asking
about "although these have some limitations that normal tables do not"), I
was thinking about the fact that the core system does not enforce
(locally) any constraints defined on foreign tables.  Since we allow
inserting data into partitions directly, it is imperative that we enforce
the "partition constraint" along with the traditional constraints such as
NOT NULL and CHECK constraints, which we can do for local table partitions
but not for foreign table ones.

Anyway, attached patch documents all these limitations about foreign table
partitions more prominently.