public void createTables(DatabaseSession session) {
    dropTableConstraints(session);
    new InheritanceTableCreator().replaceTables(session);

    SchemaManager schemaManager = new SchemaManager(session);
    if (session.getLogin().getPlatform().isOracle()) {
      schemaManager.replaceObject(Computer.oracleView());
      schemaManager.replaceObject(Vehicle.oracleView());
    } else if (session.getLogin().getPlatform().isSybase()) {
      schemaManager.replaceObject(Computer.sybaseView());
      schemaManager.replaceObject(Vehicle.sybaseView());
      // CREATE VIEW statement was added in MySQL 5.0.1.  Uncomment it when we support MySQL 5
      // } else if (session.getLogin().getPlatform().isMySQL()) {
      // schemaManager.replaceObject(Computer.sybaseView());
      // schemaManager.replaceObject(Vehicle.mySQLView());
    }
  }
  public void addDescriptors(DatabaseSession session) {
    // Oracle has bug in outjoins that require outerjoin of inheritance type.
    // This should really be handled by the platform during expression normalization...
    // Id for Entomologist can be negative (millis cast to int wraps...)
    project.getDescriptor(Entomologist.class).setIdValidation(IdValidation.NONE);

    session.addDescriptors(project);

    // For using read all subclasses views.
    DatabasePlatform platform = session.getLogin().getPlatform();
    if (platform.isOracle() || platform.isSybase()) {
      ClassDescriptor computerDescriptor = session.getDescriptor(Computer.class);
      ClassDescriptor vehicleDescriptor = session.getDescriptor(Vehicle.class);
      computerDescriptor.getInheritancePolicy().setReadAllSubclassesViewName("AllComputers");
      vehicleDescriptor.getInheritancePolicy().setReadAllSubclassesViewName("AllVehicles");
    }

    // Enable outer-join on AnimalMatt hierarchy.
    session
        .getDescriptor(Animal_Matt.class)
        .getInheritancePolicy()
        .setShouldOuterJoinSubclasses(true);
  }