Thom Brown <t...@linux.com> writes: > So the ctid is always 2^32-1. Bit weird, but probably explainable.
See ItemPointerSetInvalid. > But xmin on the file_fdw result is odd. Why are these all over the > place? heap_form_tuple initializes the t_choice fields as though for a tuple Datum, and file_fdw doesn't change it. Just a couple hours ago I was wondering why we create system columns for foreign tables at all. Is there a reasonable prospect that they'll ever be useful? I can see potential value in tableoid, but the others seem pretty dubious --- even if you were fetching from a remote PG server, the XIDs would not be meaningful within our own environment. regards, tom lane -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers