ccaa97a5ac
This CL make bitmap_count, bitmap_union, and bitmap_union_count accept any expression whose return type is bitmap as input so that we can support flexible bitmap expression such as bitmap_count(bitmap_and(to_bitmap(1), to_bitmap(2))). This CL also create separate documentation for each bitmap UDF to conform with other functions.
1.2 KiB
1.2 KiB
bitmap_and
description
Syntax
BITMAP BITMAP_AND(BITMAP lhs, BITMAP rhs)
计算两个输入bitmap的交集，返回新的bitmap.
example
mysql> select bitmap_count(bitmap_and(to_bitmap(1), to_bitmap(2))) cnt;
+------+
| cnt |
+------+
| 0 |
+------+
mysql> select bitmap_count(bitmap_and(to_bitmap(1), to_bitmap(1))) cnt;
+------+
| cnt |
+------+
| 1 |
+------+
keyword
BITMAP_AND,BITMAP