isidentical opened a new issue, #4374:
URL: https://github.com/apache/arrow-datafusion/issues/4374

   **Is your feature request related to a problem or challenge? Please describe 
what you are trying to do.**
   `FilterExec` can estimate the `total_byte_size` (as it is estimating the 
number of rows) when selectivity is available to us.
   
   **Describe the solution you'd like**
   Normalize the `total_byte_size` by that filter predicate's selectivity to 
obtain the estimated number of result bytes.
   
   **Describe alternatives you've considered**
   None
   
   **Additional context**
   Originally from @mingmwang at 
https://github.com/apache/arrow-datafusion/issues/4372#issuecomment-1327404807
   


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