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Posted to dev@hive.apache.org by "Vinod Kumar Vavilapalli (JIRA)" <ji...@apache.org> on 2013/03/02 00:17:12 UTC

[jira] [Created] (HIVE-4105) Hive MapJoinOperator unnecessarily deserializes values for all join-keys

Vinod Kumar Vavilapalli created HIVE-4105:
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             Summary: Hive MapJoinOperator unnecessarily deserializes values for all join-keys
                 Key: HIVE-4105
                 URL: https://issues.apache.org/jira/browse/HIVE-4105
             Project: Hive
          Issue Type: Bug
            Reporter: Vinod Kumar Vavilapalli


We can avoid this for inner-joins. Hive does an explicit value de-serialization up front so even for those rows which won't emit output. In these cases, we can do just with key de-serialization.


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