Robert Haas <robertmh...@gmail.com> writes: > The Gather node, as currently committed, is neither projection-capable > nor listed as an exception in is_projection_capable_plan. Amit > discovered this in testing, and I hit it in my testing as well. We > could just mark it as being not projection-capable, but I think it > might be better to go the other way and give it projection > capabilities.
Um ... why would you not want the projections to happen in the child nodes, where they could be parallelized? Or am I missing something? > While that's not the end of the world, it seems to needlessly fly in > the face of the general principle that nodes should generally try to > support projection. I'm not sure there is any such principle. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers