bitmap_count

入力されたビットマップの 1 ビット数を返します。

Syntax

INT BITMAP_COUNT(any_bitmap)

Examples

MySQL > select bitmap_count(bitmap_from_string("1,2,4"));
+-------------------------------------------+
| bitmap_count(bitmap_from_string('1,2,4')) |
+-------------------------------------------+
|                                         3 |
+-------------------------------------------+

MySQL > select bitmap_count(NULL);
+--------------------+
| bitmap_count(NULL) |
+--------------------+
|                  0 |
+--------------------+

keyword

BITMAP,BITMAP_COUNT