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  1. Hive
  2. HIVE-3959

Update Partition Statistics in Metastore Layer

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.13.0
    • Component/s: Metastore, Statistics
    • Labels:
      None

      Description

      When partitions are created using queries ("insert overwrite" and "insert into") then the StatsTask updates all stats. However, when partitions are added directly through metadata-only partitions (either CLI or direct calls to Thrift Metastore) no stats are populated even if hive.stats.reliable is set to true. This puts us in a situation where we can't decide if stats are truly reliable or not.

      We propose that the "fast stats" (numFiles and totalSize) which don't require a scan of the data should always be populated and be completely reliable. For now we are still excluding rowCount and rawDataSize because that will make these operations very expensive. Currently they are quick metadata-only ops.

        Attachments

        1. HIVE-3959.patch.2
          55 kB
          Gang Tim Liu
        2. HIVE-3959.patch.12.txt
          745 kB
          Gang Tim Liu
        3. HIVE-3959.patch.11.txt
          740 kB
          Gang Tim Liu
        4. HIVE-3959.patch.1
          55 kB
          Gang Tim Liu
        5. HIVE-3959.6.patch
          915 kB
          Ashutosh Chauhan
        6. HIVE-3959.5.patch
          909 kB
          Ashutosh Chauhan
        7. HIVE-3959.4.patch
          919 kB
          Ashutosh Chauhan
        8. HIVE-3959.4.patch
          914 kB
          Ashutosh Chauhan
        9. HIVE-3959.3.patch
          959 kB
          Ashutosh Chauhan
        10. HIVE-3959.3.patch
          917 kB
          Ashutosh Chauhan
        11. HIVE-3959.2.patch
          913 kB
          Ashutosh Chauhan
        12. HIVE-3959.1.patch
          913 kB
          Ashutosh Chauhan

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              • Assignee:
                ashutoshc Ashutosh Chauhan
                Reporter:
                bmandhani Bhushan Mandhani
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                Dates

                • Created:
                  Updated:
                  Resolved: