CREATE TABLE test (pk int primary key);
INSERT INTO test VALUES (0), (1);

CREATE TABLE test_info (id int, info varchar(255), test_pk int, primary key(id), foreign key (test_pk) references test(pk));

COPY test_info FROM STDIN WITH (HEADER);
id	info	test_pk
4	string for 4	1
5	string for 5	0
6	string for 6	0
\.