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Posted to dev@hive.apache.org by "Pengcheng Xiong (JIRA)" <ji...@apache.org> on 2015/04/27 08:17:38 UTC

[jira] [Created] (HIVE-10493) Merge multiple joins when join keys are the same

Pengcheng Xiong created HIVE-10493:
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             Summary: Merge multiple joins when join keys are the same
                 Key: HIVE-10493
                 URL: https://issues.apache.org/jira/browse/HIVE-10493
             Project: Hive
          Issue Type: Sub-task
            Reporter: Pengcheng Xiong
            Assignee: Pengcheng Xiong


CBO return path: auto_join3.q is joined on the same key from 3 sources. It is translated into 2 map joins. Need to merge them into a single one.



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