Hello, sorry, it's my bad. > Kyotaro HORIGUCHI <horiguchi.kyot...@lab.ntt.co.jp> writes: > > Hello, I found that tuples come from file_fdw has strange xmin and xmax. > > file_fdw isn't documented to return anything useful for xmin/xmax/etc, > so I don't find this surprising. > > > The patch attached fixes the header of materialized tuple to be > > sane (2, 0) if the source slot was a virtual tuple in mechanism(). > > I don't really think it's ForeignNext's place to be doing something > about this. It seems like a useless expenditure of cycles. Besides, > this fails to cover e.g. postgres_fdw, which is likewise unconcerned > about what it returns for system columns other than ctid.
I somehow misunderstood that postgres_fdw returns (xmin, xmax) = (2, 0) but I confirmed that xmin, xmax and citd seems insane. I completely agree with you. Thank you for giving response for the stupid story. regards, -- Kyotaro Horiguchi NTT Open Source Software Center -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers