Just to let you know, I'm hacking this patch again, the executor part in
particular. I've got a stripped out the unfinished window frame stuff,
refactored the Window object API so that the window functions don't get
to, and don't need to, access tuple slots directly. And a bunch of other
simplifications as well. I'll post as soon as it's in a more readable state.
-- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com