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  1. Hive
  2. HIVE-15397

metadata-only queries may return incorrect results with empty tables

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 2.2.0
    • None

    Description

      Queries like select 1=1 from t group by 1=1 may return rows, based on OneNullRowInputFormat, even if the source table is empty. For now, add some basic detection of empty tables and turn this off by default (since we can't know whether a table is empty or not based on there being some files, without reading them).

      Attachments

        1. HIVE-15397.01.patch
          19 kB
          Sergey Shelukhin
        2. HIVE-15397.patch
          13 kB
          Sergey Shelukhin

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              sershe Sergey Shelukhin
              sershe Sergey Shelukhin
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                Created:
                Updated:
                Resolved: