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  1. Hive
  2. HIVE-2451

TABLESAMBLE(BUCKET xxx) sometimes doesn't trigger input pruning as regression of HIVE-1538

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.8.0
    • Component/s: None
    • Labels:
      None

      Description

      Example:

      select count(1) from <bucket_table> TABLESAMPLE(BUCKET xxx out of yyy) where <partition_column> = 'xxx'

      will not trigger input pruning.

      The reason is that we assume sample filtering operator only happens as the second filter after table scan, which is broken by HIVE-1538, even if the feature doesn't turn on.

        Attachments

        1. HIVE-2451.1.patch
          0.7 kB
          Siying Dong
        2. HIVE-2451.2.patch
          97 kB
          Siying Dong
        3. HIVE-2451.3.patch
          137 kB
          Siying Dong

          Activity

            People

            • Assignee:
              sdong Siying Dong
              Reporter:
              sdong Siying Dong
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              Dates

              • Created:
                Updated:
                Resolved: