async def scroll(self, value, mode='relative'):
        """Scroll the cursor in the result set to a new position
        according to mode . Same as :meth:`Cursor.scroll`, but move cursor
        on server side one by one row. If you want to move 20 rows forward
        scroll will make 20 queries to move cursor. Currently only forward
        scrolling is supported.

        :param int value: move cursor to next position according to mode.
        :param str mode: scroll mode, possible modes: `relative` and `absolute`
        """

        self._check_executed()

        if mode == 'relative':
            if value < 0:
                raise NotSupportedError("Backwards scrolling not supported "
                                        "by this cursor")

            for _ in range(value):
                await self._read_next()
            self._rownumber += value
        elif mode == 'absolute':
            if value < self._rownumber:
                raise NotSupportedError(
                    "Backwards scrolling not supported by this cursor")

            end = value - self._rownumber
            for _ in range(end):
                await self._read_next()
            self._rownumber = value
        else:
            raise ProgrammingError("unknown scroll mode %s" % mode)
Scroll the cursor in the result set to a new position
        according to mode . Same as :meth:`Cursor.scroll`, but move cursor
        on server side one by one row. If you want to move 20 rows forward
        scroll will make 20 queries to move cursor. Currently only forward
        scrolling is supported.

        :param int value: move cursor to next position according to mode.
        :param str mode: scroll mode, possible modes: `relative` and `absolute`