bitmap_empty

description

Syntax

BITMAP BITMAP_EMPTY()

Return an empty bitmap. Mainly be used to supply default value for bitmap column when loading, e.g.,

1. cat data | curl --location-trusted -u user:passwd -T - -H "columns: dt,page,v1,v2=bitmap_empty()"   http://host:8410/api/test/testDb/_stream_load

example

1. mysql> select bitmap_count(bitmap_empty());
2. +------------------------------+
3. | bitmap_count(bitmap_empty()) |
4. +------------------------------+
5. |                            0 |
6. +------------------------------+

8. mysql> select bitmap_to_string(bitmap_empty());
9. +----------------------------------+
10. | bitmap_to_string(bitmap_empty()) |
11. +----------------------------------+
12. |                                  |
13. +----------------------------------+

keywords

1. BITMAP_EMPTY,BITMAP