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  1. OpenJPA
  2. OPENJPA-1440

Allow COUNT(*) instead of COUNT(t0.id) for simple queries as an option

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 1.2.3, 1.3.0, 2.0.0-beta
    • None
    • None

    Description

      SQL generated for "select p for PObject p" is SELECT COUNT(t0.id) FROM POBJECT t0". This is valid and according to JPQL spec which does not accept COUNT.

      However, JDBC Drivers for legacy databases may not always support COUNT(columnName) as reported in [1].

      OpenJPA should support such cases with a boolean option DBDictionary.useWildCardForCount.

      [1] http://n2.nabble.com/COUNT-t-to-COUNT-tc4176827.html#a4176827

      Attachments

        1. OPENJPA-1440-1.2.x.patch.txt
          6 kB
          Heath Thomann
        2. OPENJPA-1440-1.3.x.patch.txt
          6 kB
          Heath Thomann

        Activity

          People

            ppoddar@apache.org Pinaki Poddar
            ppoddar@apache.org Pinaki Poddar
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            Dates

              Created:
              Updated:
              Resolved: