public void changeColumnPairs(ColumnPairElement[] pairs, int action) throws DBException {
   columnPairs.changeElements(pairs, action);
 }
 /**
  * Change the set of indexes.
  *
  * @param elems the indexes to change
  * @param action one of {@link #ADD}, {@link #REMOVE}, or {@link #SET}
  * @exception DBException if the action cannot be handled
  */
 public void changeIndexes(IndexElement[] elems, int action) throws DBException {
   indexes.changeElements(elems, action);
 }
 /**
  * Change the set of keys.
  *
  * @param elems the keys to change
  * @param action one of {@link #ADD}, {@link #REMOVE}, or {@link #SET}
  * @exception DBException if the action cannot be handled
  */
 public void changeKeys(KeyElement[] elems, int action) throws DBException {
   keys.changeElements(elems, action);
 }
 /**
  * Change the set of columns.
  *
  * @param elems the columns to change
  * @param action one of {@link #ADD}, {@link #REMOVE}, or {@link #SET}
  * @exception DBException if the action cannot be handled
  */
 public void changeColumns(ColumnElement[] elems, int action) throws DBException {
   columns.changeElements(elems, action);
 }