@LiteralParameters("x")
    @ScalarOperator(INDETERMINATE)
    @SqlType(StandardTypes.BOOLEAN)
    public static boolean indeterminate(@SqlType("char(x)") Slice value, @IsNull boolean isNull)
    {
        return isNull;
    }
@Test
    public void testIndeterminate()
    {
        assertOperator(INDETERMINATE, "CAST(null AS CHAR(3))", BOOLEAN, true);
        assertOperator(INDETERMINATE, "CHAR '123'", BOOLEAN, false);
    }