Dandandan opened a new issue, #3845:
URL: https://github.com/apache/arrow-datafusion/issues/3845

   **Is your feature request related to a problem or challenge? Please describe 
what you are trying to do.**
   @isidentical implemented more statistics-rules for joins. When a 
`FilterExec` is between a `TableScan` however, we do not return a join 
estimation yet.
   
   **Describe the solution you'd like**
   We should provide an estimation based on the filterexpressions and 
statistics information that we have.
   
   **Describe alternatives you've considered**
   
   **Additional context**
   Add any other context or screenshots about the feature request here.
   


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