CREATE TABLE test_locks (id serial, b char(16), c char(16) );
INSERT INTO test_locks(b) VALUES ('one');
INSERT INTO test_locks(b) VALUES ('two');
INSERT INTO test_locks(b) VALUES ('three');

-- Enable locks checking on the table
SELECT CheckAuth('test_locks', 'id');

-- this has no lock
UPDATE test_locks SET c = 'nolocks';

-- place the lock
SELECT LockRow('test_locks', '1', 'auth1', now()::timestamp+'00:01');
SELECT LockRow('test_locks', '2', 'auth2', now()::timestamp+'00:01');

-- this should fail due to missing auth
UPDATE test_locks SET c = 'unauthorized' where id = 1;

BEGIN;

	-- Add authorization for row 1
	SELECT AddAuth('auth1');

	-- we're authorized for row 1
	UPDATE test_locks SET c = 'authorized' where id = 1;

END;

-- Out of transaction we're no more authorized for row 1
UPDATE test_locks SET c = 'unauthorized' where id = 1;

BEGIN;

	-- Add authorization for row 2
	SELECT AddAuth('auth2');

	-- we're authorized for row 2
	UPDATE test_locks SET c = 'authorized' where id = 2;

END;

BEGIN;

	-- Add authorization for row 2
	SELECT AddAuth('auth2');

	-- we're *not* authorized for row 1
	UPDATE test_locks SET c = 'unauthorized' where id = 1;

END;

UPDATE test_locks SET c = 'unauthorized' where id = 2;
UPDATE test_locks SET c = 'unauthorized' where id = 1;

SELECT * from test_locks;
DROP TABLE test_locks;