Druid adapter: wrong semantics of topN query limit with granularity

SELECT i_brand_id, floor_day(`__time`), max(ss_quantity), sum(ss_wholesale_cost) as s
FROM store_sales_sold_time_subset
GROUP BY i_brand_id, floor_day(`__time`)
ORDER BY s DESC
LIMIT 10;

SELECT rs.i_brand_id, rs.d, rs.m, rs.s
FROM (
    SELECT i_brand_id, floor_day(`__time`) as d, max(ss_quantity) as m, sum(ss_wholesale_cost) as s,
           ROW_NUMBER() OVER (PARTITION BY floor_day(`__time`) ORDER BY sum(ss_wholesale_cost) DESC ) AS rownum
    FROM store_sales_sold_time_subset
    GROUP BY i_brand_id, floor_day(`__time`)
) rs
WHERE rownum <= 10;