public RowId getRowId(int columnIndex) throws SQLException {
        throw new SQLFeatureNotSupportedException(resBundle.handleGetObject("jdbcrowsetimpl.featnotsupp").toString());
    }
Retrieves the value of the designated column in the current row of this
<code>ResultSet</code> object as a java.sql.RowId object in the Java
programming language.

@param columnIndex the first column is 1, the second 2, ...
@return the column value if the value is a SQL <code>NULL</code> the
    value returned is <code>null</code>
@throws SQLException if a database access error occurs
@since 6.0
src/main/java/org/replicadb/rowset/sun/rowset/JdbcRowSetImpl.java