---
{
    "title": "bitmap_or",
    "language": "zh-CN"
}
---

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# 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