Dandandan opened a new issue #618:
URL: https://github.com/apache/arrow-datafusion/issues/618


   **Is your feature request related to a problem or challenge? Please describe 
what you are trying to do.**
   Currently, we need to read *some* column in order to compute the number of 
records of the table correctly. For sources like Parquet however, we can use 
the table statistics instead.
   
   **Describe the solution you'd like**
   
   
   **Describe alternatives you've considered**
   Create an optimization rule that uses the statistics and replaced the count 
expression with the statistics based size of the table.
   
   **Additional context**
   
   


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