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Posted to dev@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2019/03/30 05:23:00 UTC

[jira] [Created] (HIVE-21548) Statistics: String statistics computation is slower with vectorization enabled

Gopal V created HIVE-21548:
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             Summary: Statistics: String statistics computation is slower with vectorization enabled
                 Key: HIVE-21548
                 URL: https://issues.apache.org/jira/browse/HIVE-21548
             Project: Hive
          Issue Type: Improvement
          Components: Statistics, Vectorization
            Reporter: Gopal V
         Attachments: string-stats-hll.png

Computing the hashCode of a String for HLL is going

byte[] -> Text  -> String -> byte[]

to get the Murmur3 hashCode of the byte[] region.

 !string-stats-hll.png! 



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