ResultTransformer z createSQLQuery wymusza brak camelCase w polach encji

Możesz użyć addScalar(String columnAlias, Type type) aby jawnie zadeklarować alias kolumny Twojego natywnego SQL:

  getCurrentSession()
  .createSQLQuery( "select e.id as id,e.first_name as firstName,e.password as password from xxxxxx")
                .addScalar("id",StandardBasicTypes.INTEGER )
                .addScalar("firstName",StandardBasicTypes.STRING )
                .addScalar("password",StandardBasicTypes.STRING )
                .setResultTransformer(Transformers.aliasToBean(Employee.class))
                .list();