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Posted to dev@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2017/04/25 20:37:04 UTC

[jira] [Created] (HIVE-16533) Vectorization: Avoid evaluating empty groupby keys

Gopal V created HIVE-16533:
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             Summary: Vectorization: Avoid evaluating empty groupby keys
                 Key: HIVE-16533
                 URL: https://issues.apache.org/jira/browse/HIVE-16533
             Project: Hive
          Issue Type: Bug
          Components: Vectorization
    Affects Versions: 2.1.1, 3.0.0
            Reporter: Gopal V
            Assignee: Gopal V


VectorHashKeyWrapperBatch::evaluateBatch() dirties the L1 cache and slows down simple count/sum/min/max queries.



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