def _convert_query(self, query):
output = Query(None)
output.select = self._convert_clause(query.select)
output.where = self.convert(query.where)
output.frum = self._convert_from(query.frum)
output.edges = convert_list(self._convert_edge, query.edges)
output.having = convert_list(self._convert_having, query.having)
output.window = convert_list(self._convert_window, query.window)
output.sort = self._convert_clause(query.sort)
output.format = query.format
return output
