@ScalarOperator(LESS_THAN_OR_EQUAL)
    @SqlType(StandardTypes.BOOLEAN)
    public static boolean lessThanOrEqual(@SqlType(StandardTypes.BOOLEAN) boolean left, @SqlType(StandardTypes.BOOLEAN) boolean right)
    {
        return !left || right;
    }
@Test
    public void testLessThanOrEqual()
    {
        assertFunction("true <= true", BOOLEAN, true);
        assertFunction("true <= false", BOOLEAN, false);
        assertFunction("false <= true", BOOLEAN, true);
        assertFunction("false <= false", BOOLEAN, true);
    }