select rank() over (partition by A, B) as r, sum(x) over(A, C) as s from T;
A is a common partition key for all windowExpressions, that is A is intersection of {A,B} and {A, C}
we could push filter A=1 through this window, since A is a common Partition key:
select * from (select a, row_number() over (partition by a) from win) T where a=1;
origin plan:
----filter((T.a = 1))
----------PhysicalWindow
------------PhysicalQuickSort
--------------PhysicalProject
------------------PhysicalOlapScan[win]
transformed to
----PhysicalWindow
------PhysicalQuickSort
--------PhysicalProject
----------filter((T.a = 1))
------------PhysicalOlapScan[win]
But C=1 can not be pushed through window.
8c2a721873