cosine_distance
description
Syntax
DOUBLE cosine_distance(ARRAY<T> array1, ARRAY<T> array2)计算两个向量（向量值为坐标）之间的余弦距离 如果输入array为NULL，或者array中任何元素为NULL，则返回NULL
Notice
- 输入数组的子类型支持：TINYINT、SMALLINT、INT、BIGINT、LARGEINT、FLOAT、DOUBLE
- 输入数组array1和array2，元素数量需保持一致
example
sql> SELECT cosine_distance([1, 2], [2, 3]);
+-------------------------------------------+
| cosine_distance(ARRAY(1, 2), ARRAY(2, 3)) |
+-------------------------------------------+
| 0.0077221232863322609 |
+-------------------------------------------+keywords
COSINE_DISTANCE,DISTANCE,COSINE,ARRAY