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