bitmap_hash64

bitmap_hash64

description

Syntax

BITMAP BITMAP_HASH64(expr)

对任意类型的输入计算64位的哈希值，返回包含该哈希值的bitmap。主要用于stream load任务将非整型字段导入Doris表的bitmap字段。例如

cat data | curl --location-trusted -u user:passwd -T - -H "columns: dt,page,device_id, device_id=bitmap_hash64(device_id)"   http://host:8410/api/test/testDb/_stream_load

example

mysql> select bitmap_count(bitmap_hash64('hello'));
+------------------------------------+
| bitmap_count(bitmap_hash64('hello')) |
+------------------------------------+
|                                  1 |
+------------------------------------+

keywords

BITMAP_HASH,BITMAP