bitmap_union_int

Count the number of different values ​​in columns of type TINYINT, SMALLINT and INT, return the sum of COUNT (DISTINCT expr) same.

Syntax

BIGINT bitmap_union_int(expr)

Parameters

expr: column expression. The supported column type is TINYINT, SMALLINT and INT.

Return value

Returns a value of the BIGINT type.

Examples

mysql> select bitmap_union_int(k1) from tbl1;
+------------------------+
| bitmap_union_int(`k1`) |
+------------------------+
|                      2 |
+------------------------+