title: REPEATABLE_READ on Oracle using JPA in Spring
body: <p><br/>when I try to set isolation level using spring annotation to REPEATABLE_READ on Oracle DB I get:<br/>
  <strong>java.sql.SQLException: READ_COMMITTED and SERIALIZABLE are the only valid transaction levels.</strong> - (ORA-17030)</p>
  
  <p>It's a way to deal with this?</p>
  
  <pre><code>@Transactional(isolation = Isolation.REPEATABLE_READ)
  @Override
  public List&lt;ToMq&gt; getAndChange1000NotForwarded() {
      String queryText = "SELECT c FROM ToMq c WHERE c.forwarded = 0 AND";
      TypedQuery&lt;ToMq&gt; query = em.createQuery(queryText, ToMq.class);
      query.setMaxResults(1000);
      List&lt;ToMq&gt; resultList = query.getResultList();
  
      Date current = new Date();
      for (ToMq toMq : resultList) {
          toMq.setForwarded(Boolean.TRUE);
          toMq.setForwardTimestamp(current);
      }
      save(resultList);
  
      return resultList;
  }
  </code></pre>