CREATE TABLE t (val vector(3), val2 halfvec(3));
INSERT INTO t (val, val2) VALUES ('[0,0,0]', '[0,0,0]'), ('[1,2,3]', '[1,2,3]'), ('[1,1,1]', '[1,1,1]'), (NULL, NULL);
CREATE TABLE t2 (val vector(3), val2 halfvec(3));
\copy t TO 'results/data.bin' WITH (FORMAT binary)
\copy t2 FROM 'results/data.bin' WITH (FORMAT binary)
SELECT * FROM t2 ORDER BY val;
   val   |  val2   
---------+---------
 [0,0,0] | [0,0,0]
 [1,1,1] | [1,1,1]
 [1,2,3] | [1,2,3]
         | 
(4 rows)

DROP TABLE t;
DROP TABLE t2;