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[jira] [Created] (HIVE-20142) Semijoin Reduction : Peform cost based removal after rule based removal.


Deepak Jaiswal created HIVE-20142:
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             Summary: Semijoin Reduction : Peform cost based removal after rule based removal.
                 Key: HIVE-20142
                 URL: https://issues.apache.org/jira/browse/HIVE-20142
             Project: Hive
          Issue Type: Task
            Reporter: Deepak Jaiswal
            Assignee: Deepak Jaiswal


The semijoin reduction removal logic is spread out into multiple functions. Currently, the cost based removal logic is applied before the rule based(dumb) ones. 

Instead, apply the rule based removal logic and then apply the cost based removal.

 

cc [~jdere] [~jcamachorodriguez]



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