@ScalarOperator(BETWEEN)
    @SqlType(StandardTypes.BOOLEAN)
    public static boolean between(@SqlType("unknown") boolean value, @SqlType("unknown") boolean min, @SqlType("unknown") boolean max)
    {
        throw new AssertionError("value of unknown type should all be NULL");
    }
@Test
    public void testBetween()
    {
        assertFunction("NULL BETWEEN NULL AND NULL", BOOLEAN, null);
    }