@Override
  public String toString() {
    String name;
    try {
      name = m_parent.getName() + "." + m_column.getName();
    } catch (DbException ex) {
      name = super.toString();
    } // end try

    return name;
  }
  public String getName() {
    String tableName = m_parent.getName();
    String columnName;

    try {
      columnName = m_column.getName();
    } catch (DbException ex) {
      columnName = "???";
    }

    String name = tableName + "." + columnName;
    return name;
  }