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Posted to dev@hive.apache.org by "BELUGA BEHR (JIRA)" <ji...@apache.org> on 2018/07/23 12:58:00 UTC

[jira] [Created] (HIVE-20222) Enable Skew Join Optimization For Outer Joins

BELUGA BEHR created HIVE-20222:
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             Summary: Enable Skew Join Optimization For Outer Joins
                 Key: HIVE-20222
                 URL: https://issues.apache.org/jira/browse/HIVE-20222
             Project: Hive
          Issue Type: New Feature
          Components: Logical Optimizer
    Affects Versions: 3.0.0, 4.0.0
            Reporter: BELUGA BEHR


{code}
// We are trying to adding map joins to handle skew keys, and map join right
// now does not work with outer joins
if (!GenMRSkewJoinProcessor.skewJoinEnabled(parseCtx.getConf(), joinOp))
return;
{code}



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