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Posted to dev@hive.apache.org by "Matt McCline (JIRA)" <ji...@apache.org> on 2018/08/13 04:44:00 UTC

[jira] [Created] (HIVE-20370) Vectorization: Add Native Vector MapJoin hash table optimization for Left/Right Outer Joins when there are no Small Table values

Matt McCline created HIVE-20370:
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             Summary: Vectorization: Add Native Vector MapJoin hash table optimization for Left/Right Outer Joins when there are no Small Table values
                 Key: HIVE-20370
                 URL: https://issues.apache.org/jira/browse/HIVE-20370
             Project: Hive
          Issue Type: Bug
          Components: Hive
            Reporter: Matt McCline
            Assignee: Matt McCline


Similar to Native Vector MapJoin's InnerBigOnly optimization that uses an efficient Hash Multi-Set with a counter instead of a Hash Map with an empty value, do the same for Outer joins.



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