async def METHOD_NAME(self, n_rows: int) -> Mapping[str, int]:
    def cont() -> Mapping[str, int]:
        try:
            with self._conn, closing(self._conn.cursor()) as cursor:
                cursor.execute(sql("select", "inserted"), {"limit": n_rows})
                order = {
                    row["sort_by"]: row["insert_order"] for row in cursor.fetchall()
                }
                return order
        except OperationalError:
            return {}
    async with self._interruption():
        return await self._ex.submit(cont)