public SQLXML getSQLXML(String colName) throws SQLException {
      throw new SQLFeatureNotSupportedException(resBundle.handleGetObject("cachedrowsetimpl.opnotysupp").toString());
   }
Retrieves the value of the designated <code>SQL XML</code> parameter as a
<code>SQLXML</code> object in the Java programming language.
@param colName the name of the column from which to retrieve the value
@return a SQLXML object that maps an SQL XML value
@throws SQLException if a database access error occurs
src/main/java/org/replicadb/rowset/StreamingRowSetImpl.java