| --- | |
| { | |
| "title": "BITMAP_COUNT", | |
| "language": "en" | |
| } | |
| --- | |
| ## bitmap_count | |
| ### description | |
| #### Syntax | |
| `BITMAP BITMAP_COUNT(BITMAP lhs)` | |
| Returns the number of input bitmaps。 | |
| ### example | |
| ``` | |
| mysql> select bitmap_count(to_bitmap(1)) cnt; | |
| +------+ | |
| | cnt | | |
| +------+ | |
| | 1 | | |
| +------+ | |
| mysql> select bitmap_count(bitmap_and(to_bitmap(1), to_bitmap(1))) cnt; | |
| +------+ | |
| | cnt | | |
| +------+ | |
| | 1 | | |
| +------+ | |
| ``` | |
| ### keywords | |
| BITMAP_COUNT |