OpenJPA
  1. OpenJPA
  2. OPENJPA-1440

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

    Details

    • Type: Improvement Improvement
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.2.3, 1.3.0, 2.0.0-beta
    • Component/s: None
    • Labels:
      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

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

        Activity

          People

          • Assignee:
            Pinaki Poddar
            Reporter:
            Pinaki Poddar
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            Dates

            • Created:
              Updated:
              Resolved:

              Development