Funny, I just wrote a patch to do that some minutes ago (didn't see your email yet).
http://www.postgresql.org/message-id/CABRT9RCK=wmFUYZdqU_+MOFW5PDevLxJmZ5B=etjjnubvya...@mail.gmail.com Regards, Marti On Sat, Jan 18, 2014 at 7:10 PM, Jeremy Harris <j...@wizmail.org> wrote: > On 13/01/14 18:01, Alexander Korotkov wrote: > >> Thanks. It's included into attached version of patch. As wall as >> estimation >> improvements, more comments and regression tests fix. >> > > Would it be possible to totally separate the two sets of sort-keys, > only giving the non-index set to the tuplesort? At present tuplesort > will, when it has a group to sort, make wasted compares on the > indexed set of keys before starting on the non-indexed set. > -- > Cheers, > Jeremy > > > > > -- > Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-hackers >
