Gopal Vijayaraghavan created HIVE-22797:
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Summary: ACID: Remove the map-side GBY for the Merge cardinality
check
Key: HIVE-22797
URL: https://issues.apache.org/jira/browse/HIVE-22797
Project: Hive
Issue Type: Bug
Components: Physical Optimizer, Transactions
Reporter: Gopal Vijayaraghavan
The hash-aggregate of the cardinality check on the mapper is entirely useless
as the ideal scenario is that we don't have any duplicates at all.
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