Deepak Jaiswal created HIVE-17936:
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Summary: Dynamic Semijoin Reduction : markSemiJoinForDPP marks
unwanted semijoin branches
Key: HIVE-17936
URL: https://issues.apache.org/jira/browse/HIVE-17936
Project: Hive
Issue Type: Bug
Reporter: Deepak Jaiswal
Assignee: Deepak Jaiswal
In method markSemiJoinForDPP (HIVE-17399), the nDVs comparison should not have
equality as there is a chance that the values are same on both sides and the
branch is still marked as good when it shouldn't be.
Add a configurable factor to see how useful this is if nDVs on smaller side are
only slightly less than that on TS side.
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