@ScalarOperator(EQUAL)
    @SqlType(StandardTypes.BOOLEAN)
    @SqlNullable
    public static Boolean equal(@SqlType(StandardTypes.BOOLEAN) boolean left, @SqlType(StandardTypes.BOOLEAN) boolean right)
    {
        return left == right;
    }
@Test
    public void testEqual()
    {
        assertFunction("true = true", BOOLEAN, true);
        assertFunction("true = false", BOOLEAN, false);
        assertFunction("false = true", BOOLEAN, false);
        assertFunction("false = false", BOOLEAN, true);
    }