"Martijn van Oosterhout" <[EMAIL PROTECTED]> writes: > From an implementation point of view, the only difference between > breadth-first and depth-first is that your tuplestore needs to be LIFO > instead of FIFO.
I think it's not so simple. How do you reconcile that concept with the join plans like merge join or hash join which expect you to be able to be able to process the records in a specific order? It sounds like you might have to keep around a stack of started executor nodes or something but hopefully we can avoid anything like that because, well, ick. -- Gregory Stark EnterpriseDB http://www.enterprisedb.com Ask me about EnterpriseDB's PostGIS support! -- Sent via pgsql-patches mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-patches