mustafasrepo commented on PR #8920:
URL: 
https://github.com/apache/arrow-datafusion/pull/8920#issuecomment-1903489969

   I think this PR add two functionality. Which are
   - Removing hard coded output types from builtin window functions so that all 
handled using `return_type` API.
   - Removing `physical_input_schema` from `create_window_expr` function.
   I think first change is better. However, second change is misleading. With 
the changes in this PR, given `logical_input_schema` is no longer actual input 
schema, but really window schema. 
   However, I think we can merge this PR as is, Then I will file a PR to 
retract 2nd part. We can discuss pros and cons of it in that PR.


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