Added a (disabled and feature-flagged) planner rule that matches:
ReadRange -> window -> { min, max, mean, count, sum }
The rule requires:
* the pushDownWindowAggregate{Count,Rest} feature flags enabled
* having WindowAggregateCapability
(which StorageReader does not currently have)
* use of "_value" columns only
* window.period == window.every
* window.every.months == 0
* window.every is positive
* window.offset == 0
* standard time columns
* createEmpty is false
Brett Buddin
jlapacik
Gavin Cabbage
Adrian Thurston