cloud-fan commented on pull request #30558:
URL: https://github.com/apache/spark/pull/30558#issuecomment-736540889


   > As time shows, we need more rewrite rules that would be executed after the 
operator optimization and before any stats-related rules for v2 tables.
   
   Can you give one example? Why can't the rewrite rules be put in the main 
optimization batch?


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