Uploaded image for project: 'OpenJPA'
  1. OpenJPA
  2. OPENJPA-421

OpenJPA generates bad SQL before configuration fully populated

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.0.0, 1.0.1, 1.1.0
    • Fix Version/s: 1.0.1, 1.1.0
    • Component/s: jdbc
    • Labels:
      None

      Description

      When openjpa.jdbc.DBDictionary is set in persistence.xml file, OpenJPA creates a new DBDictionary instance by loading the class specified in the properties without trying to connect to database. It leaves version related configuration unset until the first connection to the database and creates the window of referencing partial properties in the DBDictionary. The problem happens when the first sql statement gets constructed within this window with lack of the knowledge of the version of the database.

      For example, with the setting that described below, BIGINT was generated in the
      SQL statement to be run on DB2 z/OS V8 and failed to execute because BIGINT was not supported on that version of z/OS DB2.

      1. commenting out the setting of "openjpa.jdbc.SynchronizeMappings".
      2. configure the connection properties to a z/OS database
      3. issuing a statement similar to the following to generate SQL statement with
      "CAST(? AS BIGINT)".

      Here is the testcase that I use to create the problem:
      {
      EntityManagerFactory emf1 =
      Persistence.createEntityManagerFactory("demo");
      EntityManager em1 = emf1.createEntityManager();
      em1.getTransaction().begin();
      Order o3 = (Order) em1.createQuery(
      "select o from Order o where o.oid = 68").getSingleResult();
      ...
      }

      ==>
      SELECT t0.oid, t0.version, t0.amount, t0.delivered FROM Order t0
      WHERE (t0.oid = CAST(? AS BIGINT)) optimize for 1 row [params=(long) 68]

        Attachments

          Activity

            People

            • Assignee:
              dtlee Daniel Lee
              Reporter:
              dtlee Daniel Lee
            • Votes:
              0 Vote for this issue
              Watchers:
              0 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: