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