---
{
    "title": "bitmap_not",
    "language": "en"
}
---

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# bitmap_not
## description
### Syntax

`BITMAP BITMAP_NOT(BITMAP lhs, BITMAP rhs)`

Calculate the set after lhs minus rhs, return the new bitmap.

## example

```
mysql> select bitmap_count(bitmap_not(bitmap_from_string('2,3'),bitmap_from_string('1,2,3,4'))) cnt;
+------+
| cnt  |
+------+
|    0 |
+------+

mysql> select bitmap_to_string(bitmap_not(bitmap_from_string('2,3,5'),bitmap_from_string('1,2,3,4')));
+----------------------------------------------------------------------------------------+
| bitmap_to_string(bitmap_xor(bitmap_from_string('2,3,5'), bitmap_from_string('1,2,3,4'))) |
+----------------------------------------------------------------------------------------+
| 5                                                                                      |
+----------------------------------------------------------------------------------------+
```

## keyword

    BITMAP_NOT,BITMAP