How to use the phoenixdb.avatica.proto.requests_pb2 function in phoenixdb

def create_statement(self, connection_id):
        """Creates a new statement.

        :param connection_id:
            ID of the current connection.

        :returns:
            New statement ID.
        """
        request = requests_pb2.CreateStatementRequest()
        request.connection_id = connection_id

        response_data = self._apply(request)
        response = responses_pb2.CreateStatementResponse()
        response.ParseFromString(response_data)
        return response.statement_id

def get_table_types(self, connection_id):
        request = requests_pb2.TableTypesRequest()
        request.connection_id = connection_id
        return self._apply(request)

:param statement_id:
            ID of the statement to prepare.

        :param sql:
            SQL query.

        :param max_rows_total:
            The maximum number of rows that will be allowed for this query.

        :param first_frame_max_size:
            The maximum number of rows that will be returned in the first Frame returned for this query.

        :returns:
            Result set with the signature of the prepared statement and the first frame data.
        """
        request = requests_pb2.PrepareAndExecuteRequest()
        request.connection_id = connection_id
        request.statement_id = statement_id
        request.sql = sql
        if max_rows_total is not None:
            request.max_rows_total = max_rows_total
        if first_frame_max_size is not None:
            request.first_frame_max_size = first_frame_max_size

        response_data = self._apply(request, 'ExecuteResponse')
        response = responses_pb2.ExecuteResponse()
        response.ParseFromString(response_data)
        return response.results