Tom Lane wrote: > Albe Laurenz <laurenz.a...@wien.gv.at> writes: >> I have a question concerning the Foreign Data Wrapper API: >> I find no mention of this in the documentation, but I remember that >> you can only add a resjunk column that matches an existing attribute >> of the foreign table and not one with an arbitrary name or >> definition. > >> Ist that right? > > I don't recall such a limitation offhand. It's probably true that > you can't create Vars that don't match some declared column of the > table, but that doesn't restrict what you put into resjunk columns > AFAIR.
I am confused, probably due to lack of knowledge. What I would like to do is add a custom resjunk column (e.g. a bytea) in AddForeignUpdateTargets that carries a row identifier from the scan state to the modify state. Would that be possible? Can I have anything else than a Var in a resjunk column? Yours, Laurenz Albe -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
