Etsuro Fujita <fujita.ets...@lab.ntt.co.jp> writes: > One thing I'm not sure about is: should we insist that a join can be > pushed down only if the checkAsUser fields of the relevant RTEs are > equal in the case where user mappings are meaningless to the FDW, like > file_fdw?
If we add a mechanism to let us know that the FDW doesn't care, we could relax the requirement for such cases. I don't have a strong opinion on whether that's worthwhile. It'd depend in part on how many FDWs there are that don't care, versus those that do; and I have no idea about that. regards, tom lane -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers