l2_distance

l2_distance

description

Syntax

DOUBLE l2_distance(ARRAY<T> array1, ARRAY<T> array2)

计算欧几里得空间中两点（向量值为坐标）之间的距离 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 l2_distance([1, 2], [2, 3]);
+---------------------------------------+
| l2_distance(ARRAY(1, 2), ARRAY(2, 3)) |
+---------------------------------------+
|                    1.4142135623730951 |
+---------------------------------------+

keywords

L2_DISTANCE,DISTANCE,L2,ARRAY