CREATE BINARY OPERATOR / (V1 INTEGER, V2 INTEGER) RETURNS DOUBLE PRECISION AS
BEGIN
  RETURN CAST(V1 AS DOUBLE PRECISION) / V2;
END

CREATE DOMAIN TVector2D = VARCHAR(100);

CREATE BINARY OPERATOR + (V1 TVector2D, V2 TVector2D) RETURNS TVector2D AS
BEGIN
  RETURN SumVectors(V1, V2);
END

CREATE BINARY OPERATOR * (V1 TVector2D, V2 DOUBLE PRECISION) RETURNS TVector2D AS
BEGIN
  RETURN MulVector(V1, V2);
END

CREATE BINARY OPERATOR * (V1 TVector2D, V2 INTEGER) RETURNS TVector2D AS
BEGIN
  RETURN MulVector(V1, CAST(V2 AS DOUBLE PRECISION));
END

CREATE TABLE T(V1 TVector2D, V2 TVector2D);

INSERT INTO T(V1, V2) VALUES ('1.1, 2.2', '2.2, 1.1');

SELECT V1 + V2 FROM T
-- '3.3, 3.3'

SELECT V1 * 10 FROM T
-- '11, 22'

CREATE BINARY OPERATOR ^ (V1 INTEGER, V2 INTEGER) RETURNS DOUBLE PRECISION AS
BEGIN
  RETURN Power(V1, V2);
END

SELECT 2^16 FROM RDB$DATABASE
-- 65536