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  1. Hive
  2. HIVE-25269

When the skew and parallel parameters are true simultaneously, the result is less data

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Details

    • Bug
    • Status: Open
    • Major
    • Resolution: Unresolved
    • 3.1.0, 3.1.2
    • None
    • Physical Optimizer, SQL
    • None

    Description

      When the params of hive.optimize.skewjoin, hive.groupby.skewindata and hive.exec.parallel are true, and exec sql such as 'INSERT... FROM (SUBQUERY UNIONALL ...GROUP BY...) A JOIN/LEFT JOIN A.expression', result data will be reduced. Details of SQL and test data can be found in the attachment

      Attachments

        1. comb_classcode.zip
          22 kB
          GuangMing Lu
        2. p10ids_prerec_split_ygz.zip
          98 kB
          GuangMing Lu
        3. p10ids_realpayrc_ygz.zip
          98 kB
          GuangMing Lu
        4. p10ids_riskcon.zip
          69 kB
          GuangMing Lu
        5. P10IDS_RISKLIST.zip
          48 kB
          GuangMing Lu
        6. test.sql
          4 kB
          GuangMing Lu

        Activity

          People

            Unassigned Unassigned
            luguangming GuangMing Lu
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            Dates

              Created:
              Updated: