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

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# bitmap_and
## description
### Syntax

`BITMAP BITMAP_AND(BITMAP lhs, BITMAP rhs, ...)`

Compute intersection of two or more input bitmaps, return the new bitmap.

## example

```
mysql> select bitmap_count(bitmap_and(to_bitmap(1), to_bitmap(2))) cnt;
+------+
| cnt  |
+------+
|    0 |
+------+

mysql> select bitmap_count(bitmap_and(to_bitmap(1), to_bitmap(1))) cnt;
+------+
| cnt  |
+------+
|    1 |
+------+

MySQL> select bitmap_to_string(bitmap_and(to_bitmap(1), to_bitmap(1)));
+----------------------------------------------------------+
| bitmap_to_string(bitmap_and(to_bitmap(1), to_bitmap(1))) |
+----------------------------------------------------------+
| 1                                                        |
+----------------------------------------------------------+

MySQL> select bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5')));
+-----------------------------------------------------------------------------------------------------------------------+
| bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5'))) |
+-----------------------------------------------------------------------------------------------------------------------+
| 1,2                                                                                                                   |
+-----------------------------------------------------------------------------------------------------------------------+

MySQL> select bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5'),bitmap_empty()));
+---------------------------------------------------------------------------------------------------------------------------------------+
| bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5'), bitmap_empty())) |
+---------------------------------------------------------------------------------------------------------------------------------------+
|                                                                                                                                       |
+---------------------------------------------------------------------------------------------------------------------------------------+

MySQL> select bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5'),NULL));
+-----------------------------------------------------------------------------------------------------------------------------+
| bitmap_to_string(bitmap_and(bitmap_from_string('1,2,3'), bitmap_from_string('1,2'), bitmap_from_string('1,2,3,4,5'), NULL)) |
+-----------------------------------------------------------------------------------------------------------------------------+
| NULL                                                                                                                        |
+-----------------------------------------------------------------------------------------------------------------------------+
```

## keyword

    BITMAP_AND,BITMAP