>>>>> "Andres" == Andres Freund <andres@anarazel.de> writes:
>> During the reorder of grouping sets into correct prefix order, if
>> only one aggregation pass is needed, we follow the order of the
>> ORDER BY clause to the extent possible, to minimize the chance that
>> we add unnecessary sorts. This is implemented in
>> preprocess_grouping_sets --> reorder_grouping_sets.
Andres> Thanks for finding!
Andres> Andrew, could you take a look at that?
Yes.
--
Andrew (irc:RhodiumToad)
