bitmap_and_not

description

Syntax

BITMAP BITMAP_AND_NOT(BITMAP lhs, BITMAP rhs)

将两个bitmap进行与非操作并返回计算结果。

example

mysql> select bitmap_count(bitmap_and_not(bitmap_from_string('1,2,3'),bitmap_from_string('3,4,5'))) cnt;
+------+
| cnt  |
+------+
|    2 |
+------+

keywords

BITMAP_AND_NOT,BITMAP