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  1. Hive
  2. HIVE-16947

Semijoin Reduction : Task cycle created due to multiple semijoins in conjunction with hashjoin

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 3.0.0
    • None
    • None

    Description

      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.

      Attachments

        1. HIVE-16947.1.patch
          2 kB
          Deepak Jaiswal
        2. HIVE-16947.2.patch
          3 kB
          Deepak Jaiswal
        3. HIVE-16947.3.patch
          2 kB
          Deepak Jaiswal

        Activity

          People

            djaiswal Deepak Jaiswal
            djaiswal Deepak Jaiswal
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            Dates

              Created:
              Updated:
              Resolved: