houqp opened a new issue #892:
URL: https://github.com/apache/arrow-datafusion/issues/892


   **Is your feature request related to a problem or challenge? Please describe 
what you are trying to do.**
   
   tpch query 8 is taking forever to execute in ballista because its subquery 
is planned as a cross join across 8 tables.
   
   **Describe the solution you'd like**
   
   The join conditions for query 8 are specified in the where clause. Our 
optimizer should pick this up and rewrite the cross join into inner join.
   
   **Describe alternatives you've considered**
   A clear and concise description of any alternative solutions or features 
you've considered.
   
   **Additional context**
   Surfaced from https://github.com/apache/arrow-datafusion/pull/891.
   


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