Заполнение данными таблиц

DROP TABLE IF EXISTS penalty;
DROP TABLE IF EXISTS driver;
 
CREATE TABLE driver(
id_driver INT NOT NULL PRIMARY KEY,
FIO VARCHAR(150) NOT NULL
);
 
CREATE TABLE penalty(
id_penalty INT NOT NULL PRIMARY KEY,
amount INT NOT NULL,
id_driver INT,
CONSTRAINT fk_driver FOREIGN KEY (id_driver) REFERENCES driver(id_driver)
);
 
CREATE OR REPLACE FUNCTION add_driver(_id IN INTEGER, _fio IN VARCHAR(50)) RETURNS INTEGER AS
$$
BEGIN
  IF _id IS NULL THEN
     -- sequence should be used instead
    SELECT MAX(id_driver) + 1 INTO _id FROM driver;
    IF _id IS NULL THEN
      _id := 1;
    END IF;
  END IF;
  INSERT INTO driver(id_driver, FIO) VALUES (_id, _fio);
  RETURN _id;
END;
$$
LANGUAGE plpgsql;
 
CREATE OR REPLACE FUNCTION add_penalty(_id IN INTEGER, _amount IN INTEGER, _driver IN INTEGER) RETURNS INTEGER AS
$$
BEGIN
  IF _id IS NULL THEN
     -- sequence should be used instead
    SELECT MAX(id_penalty) + 1 INTO _id FROM penalty;
    IF _id IS NULL THEN
      _id := 1;
    END IF;
  END IF;
  INSERT INTO penalty(id_penalty, amount, id_driver) VALUES (_id, _amount, _driver);
  RETURN _id;
END;
$$
LANGUAGE plpgsql;
 
CREATE OR REPLACE FUNCTION add_data(id_dri IN INT, FIO_dri VARCHAR(150), id_penal IN INT, amount INT, dout OUT INTEGER, pout OUT INTEGER) AS
$$
BEGIN
  SELECT add_driver(id_dri, FIO_dri) INTO dout;
  IF amount IS NOT NULL THEN
    SELECT add_penalty(id_penal, amount, dout) INTO pout;
  END IF;  
END;
$$ LANGUAGE PLPGSQL;

SELECT add_data(1, 'Petr', 1, 500)

PERFORM add_data(1, 'Petr', 1, 500);

DO $$
  PERFORM ....
$$