to_bitmap

description

Syntax

BITMAP TO_BITMAP(expr)

输入为取值在 0 ~ 18446744073709551615 区间的 unsigned bigint ，输出为包含该元素的bitmap。当输入值不在此范围时，会返回NULL。该函数主要用于stream load任务将整型字段导入Doris表的bitmap字段。例如

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

example

mysql> select bitmap_count(to_bitmap(10));
+-----------------------------+
| bitmap_count(to_bitmap(10)) |
+-----------------------------+
|                           1 |
+-----------------------------+

MySQL> select bitmap_to_string(to_bitmap(-1));
+---------------------------------+
| bitmap_to_string(to_bitmap(-1)) |
+---------------------------------+
|                                 |
+---------------------------------+

keywords

TO_BITMAP,BITMAP

sub_bitmap bitand