bitmap_hash64

description

Syntax

BITMAP BITMAP_HASH64(expr)

Compute the 64-bits hash value of a expr of any type, then return a bitmap containing that hash value. Mainly be used to load non-integer value into bitmap column, e.g.,

1. 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

1. mysql> select bitmap_to_string(bitmap_hash64('hello'));
2. +------------------------------------------+
3. | bitmap_to_string(bitmap_hash64('hello')) |
4. +------------------------------------------+
5. | 15231136565543391023                     |
6. +------------------------------------------+

keywords

1. BITMAP_HASH,BITMAP