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  1. Hive
  2. HIVE-195

map-side joins are not supported

    Details

    • Type: New Feature
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.4.0
    • Component/s: Query Processor
    • Labels:
      None
    • Hadoop Flags:
      Reviewed
    • Release Note:
      HIVE-195. Map-side join. (Namit Jain via zshao)

      Description

      map-side joins are not supported.

      If all the tables but one are small and can fit in memory, the join should be performed on the map-side. Ideally, it should be all cost-based, but
      to start with, the user should be given an option to specify that he needs a map-side join.

        Attachments

        1. 195.patch1.txt
          267 kB
          Namit Jain
        2. 195.patch2.txt
          498 kB
          Namit Jain
        3. 195.patch3.txt
          529 kB
          Namit Jain
        4. hive.195.4.patch
          928 kB
          Namit Jain
        5. hive.195.5.patch
          964 kB
          Namit Jain
        6. hive.195.6.patch
          964 kB
          Namit Jain
        7. hive.195.7.patch
          961 kB
          Namit Jain
        8. hive.195.8.patch
          961 kB
          Namit Jain
        9. hive.195.9.patch
          963 kB
          Namit Jain

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              • Assignee:
                namit Namit Jain
                Reporter:
                namit Namit Jain
              • Votes:
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                Dates

                • Created:
                  Updated:
                  Resolved: