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Posted to dev@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2017/01/18 03:55:26 UTC

[jira] [Created] (HIVE-15655) Optimizer: Allow config option to disable n-way JOIN merging

Gopal V created HIVE-15655:
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             Summary: Optimizer: Allow config option to disable n-way JOIN merging 
                 Key: HIVE-15655
                 URL: https://issues.apache.org/jira/browse/HIVE-15655
             Project: Hive
          Issue Type: Bug
          Components: Physical Optimizer
    Affects Versions: 2.2.0
            Reporter: Gopal V


N-way Joins in Tez produce bad runtime plans whenever they are left-outer joins with map-joins.

This is something which should have a safety setting.



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