risingwave_expr_impl::scalar::vector

Function l2_normalize

Source 
fn l2_normalize(vector: VectorRef<'_>) -> VectorVal
Expand description
query R
SELECT l2_normalize('[3,4]'::vector(2));
----
[0.6,0.8]

query R
SELECT l2_normalize('[3,0]'::vector(2));
----
[1,0]

query R
SELECT l2_normalize('[0,0.1]'::vector(2));
----
[0,1]

query R
SELECT l2_normalize('[0,0]'::vector(2));
----
[0,0]

query R
SELECT l2_normalize('[3e18]'::vector(1));
----
[1]