Marti Raudsepp <ma...@juffo.org> writes: > AFAICT, the model in the documentation suggests that the SELECT fields > are evaluated for all matching rows in indeterminate order, before > ORDER BY is applied and before the result set is sliced by > OFFSET/LIMIT.
That is in fact the case if you have a query plan that involves a Sort node followed by Limit. We have some optimizations that avoid the need for an explicit sort, but it would be pretty hard to write a specification for exactly when unretrieved rows will not be evaluated. regards, tom lane -- Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-bugs