Collection ocorrencias = session.list("from OcorrenciaVO as o where o.statusControle="+ codStatus + " order by o.id");

Iterator i = ocorrencias.iterator();
while(i.hasNext())
{
    Ocorrencia o = (Ocorrencia)i.next();
    String fileName = o.getImagePath();

    if(fileName == null)
    {
        //at this point, I get the imagePath property using JDBC and, for my
        //surprise, the field has a value (it is not null).
        //Like this:
        //stmt.executeQuery("select * from ocorrencia where id=" + o.getId()");
    }

}

<property name="imagePath" type="string" update="true" insert="true" column="image_path" length="50" />