bitmap_or

description

Syntax

BITMAP BITMAP_OR(BITMAP lhs, BITMAP rhs)

计算两个输入bitmap的并集,返回新的bitmap.

example

MySQL > select bitmap_count(bitmap_or(to_bitmap(1), to_bitmap(2))) cnt;
+------+
| cnt  |
+------+
|    2 |
+------+

MySQL > select bitmap_count(bitmap_or(to_bitmap(1), to_bitmap(1))) cnt;
+------+
| cnt  |
+------+
|    1 |
+------+

keyword

BITMAP_OR,BITMAP