Split code under mongo/db/pipeline/window_function/ into QO and QE parts and move the QE-only code under mongo/db/exec/agg/window_function.
At least partition_iterator.
{h,cpp} and all window_function_exec*.{h,cpp}should be moved.
Split code under mongo/db/pipeline/window_function/ into QO and QE parts and move the QE-only code under mongo/db/exec/agg/window_function.
At least partition_iterator.
{h,cpp} and all window_function_exec*.{h,cpp}should be moved.