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From "Deepak Jaiswal (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-16947) Semijoin Reduction : Task cycle created due to multiple semijoins in conjunction with hashjoin
Date Fri, 23 Jun 2017 03:13:00 GMT
Deepak Jaiswal created HIVE-16947:
-------------------------------------

             Summary: Semijoin Reduction : Task cycle created due to multiple semijoins in
conjunction with hashjoin
                 Key: HIVE-16947
                 URL: https://issues.apache.org/jira/browse/HIVE-16947
             Project: Hive
          Issue Type: Bug
            Reporter: Deepak Jaiswal
            Assignee: Deepak Jaiswal


Typically a semijoin branch and a mapjoin may create a cycle when on same operator tree. This
is already handled, however, a semijoin branch can serve more than one filters and the cycle
detection logic currently only handles the 1st one causing cycles preventing the queries from
running.



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