Robert Haas <robertmh...@gmail.com> writes: > I could be wrong, but I thought that the target list for an expression > would always contain only Vars at this stage. Non-default tlists get > injected at the end of scan/join planning. Am I wrong?
Target list for a relation, you mean? See relation.h: * reltarget - Default Path output tlist for this rel; normally contains * Var and PlaceHolderVar nodes for the values we need to * output from this relation. * List is in no particular order, but all rels of an * appendrel set must use corresponding orders. * NOTE: in an appendrel child relation, may contain * arbitrary expressions pulled up from a subquery! 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