CREATE EXTENSION

 vector
---------
 [1,2,3]
(1 row)

CREATE TABLE

INSERT 0 3

 id | name  | embedding |      distance
----+-------+-----------+--------------------
  1 | item1 | [1,1,1]   |                  0
  2 | item2 | [2,2,2]   | 1.7320508075688772
  3 | item3 | [3,3,3]   | 3.4641016151377544
(3 rows)