* (non-Javadoc)
*
* @see com.regesta.framework.xw.XMLEngine#addToQueryResult(it.highwaytech.db.QueryResult, it.highwaytech.db.QueryResult)
*/
public QueryResult addToQueryResult(QueryResult qrTo, QueryResult qrFrom) throws XWException, SQLException {
QueryResult result = null;
if (qrTo != null && qrFrom != null) {
result = addToQueryResult(connection, theDb, qrTo, qrFrom, null);
} else {
throw new XWException("QueryResult must not be null");
}