inner_product

description

Syntax

  1. DOUBLE inner_product(ARRAY<T> array1, ARRAY<T> array2)

Calculates the scalar product of two vectors of the same size. Return NULL if input array is NULL or any element of array is NULL.

Notice

  • nested type of input array support: TINYINT, SMALLINT, INT, BIGINT, LARGEINT, FLOAT, DOUBLE
  • input array1 and array2 should have the same element size

example

  1. sql> SELECT inner_product([1, 2], [2, 3]);
  2. +-----------------------------------------+
  3. | inner_product(ARRAY(1, 2), ARRAY(2, 3)) |
  4. +-----------------------------------------+
  5. |                                       8 |
  6. +-----------------------------------------+

keywords

  1. INNER_PRODUCT,DISTANCE,ARRAY