1 BITMAP_AND(BITMAP lhs, BITMAP rhs)

计算两个输入bitmap的交集，返回新的bitmap.

select bitmap_count(bitmap_and(to_bitmap(1), to_bitmap(2))) cnt;

select bitmap_count(bitmap_and(to_bitmap(1), to_bitmap(1))) cnt;

2 BITMAP_CONTAINS(BITMAP bitmap, BIGINT input)

计算输入值是否在Bitmap列中，返回值是Boolean值.

select bitmap_contains(to_bitmap(1),2) cnt;

 

select bitmap_contains(to_bitmap(1),1) cnt;