def nextset(self):
        if self._executed:
            self.fetchall()
        del self.messages[:]

        if not self._has_next:
            return None
        connection = self._get_db()
        connection.next_result()
        self._do_get_result()
        return True
Replace one or more values in the table's header row. E.g.::
dataset/ETHPy150Open uwdata/termite-data-server/web2py/gluon/contrib/pymysql/cursors.py/Cursor.nextset--crossover with--dataset/ETHPy150Open alimanfoo/petl/petl/transform/headers.py/rename