sigmod commented on pull request #35552:
URL: https://github.com/apache/spark/pull/35552#issuecomment-1044929425


   > Without this newly added config, we can also work around the issue by 
several options
   
   - for (1) and (2), undesirable situation can happen beyond the two. E.g., 
the skew raised in a join output for a many-to-many join;
   - for (3), sometimes modifying queries might not be feasible, e.g., queries 
generated by a reporting or visualization software stack.
   


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