Volker Grabsch <v...@notjusthosting.com> writes: > I propose the following general optimization: If all window > functions are partitioned by the same first field (here: id), > then any filter on that field should be executed before > WindowAgg.
I'm not sure if that rule is correct in detail, but in any case the short answer is that window aggregates are a new feature in Postgres and we basically haven't done any optimization work on them yet. Feel free to work in that area if it interests you... 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