query I
SELECT round(('[1,2,3]'::vector <-> '[2,3,4]'::vector):: numeric, 3);
----
1.732

query I
SELECT round(('[1,2,3]'::vector <#> '[2,3,4]'::vector):: numeric, 3);
----
-20.000

query I
SELECT round(('[1,2,3]'::vector <=> '[2,3,4]'::vector):: numeric, 3);
----
0.007

query I
SELECT round(('[1,2,3]'::halfvec <-> '[2,3,4]'::halfvec):: numeric, 3);
----
1.732

query I
SELECT round(('[1,2,3]'::halfvec <#> '[2,3,4]'::halfvec):: numeric, 3);
----
-20.000

query I
SELECT round(('[1,2,3]'::halfvec <=> '[2,3,4]'::halfvec):: numeric, 3);
----
0.007