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.
I indeed was referring to the paragraph you quoted.
I would probably just s/For example/In particular/ and call it good - or maybe also tell the user that all the limitations are listed in the notes section for create foreign table (though my first thoughts are all quite wordy).
From:
Peter Geoghegan Date: Subject:
Re: LP_DEAD hinting and not holding on to a buffer pin on leaf page(Was: [HACKERS] [WIP] Zipfian distribution in pgbench)
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