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.

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