SELECT l2_distance('[0,0]'::halfvec, '[3,4]');
 l2_distance 
-------------
           5
(1 row)

SELECT l2_distance('[0,0]'::halfvec, '[0,1]');
 l2_distance 
-------------
           1
(1 row)

SELECT l2_distance('[1,2]'::halfvec, '[3]');
ERROR:  different halfvec dimensions 2 and 1
SELECT '[0,0]'::halfvec <-> '[3,4]';
 ?column? 
----------
        5
(1 row)

SELECT inner_product('[1,2]'::halfvec, '[3,4]');
 inner_product 
---------------
            11
(1 row)

SELECT inner_product('[1,2]'::halfvec, '[3]');
ERROR:  different halfvec dimensions 2 and 1
SELECT inner_product('[65504]'::halfvec, '[65504]');
 inner_product 
---------------
    4290774016
(1 row)

SELECT '[1,2]'::halfvec <#> '[3,4]';
 ?column? 
----------
      -11
(1 row)

SELECT cosine_distance('[1,2]'::halfvec, '[2,4]');
 cosine_distance 
-----------------
               0
(1 row)

SELECT cosine_distance('[1,2]'::halfvec, '[0,0]');
 cosine_distance 
-----------------
             NaN
(1 row)

SELECT cosine_distance('[1,1]'::halfvec, '[1,1]');
 cosine_distance 
-----------------
               0
(1 row)

SELECT cosine_distance('[1,0]'::halfvec, '[0,2]');
 cosine_distance 
-----------------
               1
(1 row)

SELECT cosine_distance('[1,1]'::halfvec, '[-1,-1]');
 cosine_distance 
-----------------
               2
(1 row)

SELECT cosine_distance('[1,2]'::halfvec, '[3]');
ERROR:  different halfvec dimensions 2 and 1
SELECT cosine_distance('[1,1]'::halfvec, '[1.1,1.1]');
 cosine_distance 
-----------------
               0
(1 row)

SELECT cosine_distance('[1,1]'::halfvec, '[-1.1,-1.1]');
 cosine_distance 
-----------------
               2
(1 row)

SELECT '[1,2]'::halfvec <=> '[2,4]';
 ?column? 
----------
        0
(1 row)

SELECT l1_distance('[0,0]'::halfvec, '[3,4]');
 l1_distance 
-------------
           7
(1 row)

SELECT l1_distance('[0,0]'::halfvec, '[0,1]');
 l1_distance 
-------------
           1
(1 row)

SELECT l1_distance('[1,2]'::halfvec, '[3]');
ERROR:  different halfvec dimensions 2 and 1
SELECT quantize_binary('[1,0,-1]'::halfvec);
 quantize_binary 
-----------------
 100
(1 row)

SELECT quantize_binary('[0,0.1,-0.2,-0.3,0.4,0.5,0.6,-0.7,0.8,-0.9,1]'::halfvec);
 quantize_binary 
-----------------
 01001110101
(1 row)

SELECT subvector('[1,2,3,4,5]'::halfvec, 1, 3);
 subvector 
-----------
 [1,2,3]
(1 row)

SELECT subvector('[1,2,3,4,5]'::halfvec, 3, 2);
 subvector 
-----------
 [3,4]
(1 row)

SELECT subvector('[1,2,3,4,5]'::halfvec, -1, 3);
 subvector 
-----------
 [1]
(1 row)

SELECT subvector('[1,2,3,4,5]'::halfvec, 3, 9);
 subvector 
-----------
 [3,4,5]
(1 row)

SELECT subvector('[1,2,3,4,5]'::halfvec, 1, 0);
ERROR:  halfvec must have at least 1 dimension
SELECT subvector('[1,2,3,4,5]'::halfvec, 3, -1);
ERROR:  halfvec must have at least 1 dimension
SELECT subvector('[1,2,3,4,5]'::halfvec, -1, 2);
ERROR:  halfvec must have at least 1 dimension