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 (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers