Guys,
> Hm, that had nothing to do with multi-column correlation though.
> I'm at a loss to think of any work that matches with Josh's
> recollection.
Hmmmm .... it's possible that early e-mails about Manfred's patch claimed to
improve performance for multi-column indexes.
But it's also possible I'm remembering something else.
Darn it, though! 'cause multi-column correlation is one of our big issues on
estimates for complex queries.
--
-Josh BerkusAglio Database SolutionsSan Francisco