Problem with ROWs and UNION

Problem with ROW types in UNION.

1. UNION of ROW types fails with operator error.

create type addrs as (
    addr text,
    city    text,
    state    char(2),
    zip    text);

--
-- UNION of ROWS doesn't work (simply wrong)
--
select ROW('4514 Cherry St','Oakland','CA','94666')::addrs
UNION
select ROW('4515 Cherry St','Oakland','CA','94666')::addrs;
-- ERROR:  could not identify an ordering operator for type addrs
-- HINT:  Use an explicit ordering operator or modify the query.

--
-- But select * containing rows does work.
--
create table people (
    name    text,
    fname    text,
    addr    addrs
);
insert into people values ('ae','aem',ROW('4514 Cherry St','Oakland','CA','94666') );
insert into people values ('go','ggo',ROW('4515 Cherry St','Oakland','CA','94666') );

select * from people;
 name | fname |                addr
------+-------+-------------------------------------
 ae   | aem   | ("4514 Cherry St",Oakland,CA,94666)
 go   | ggo   | ("4515 Cherry St",Oakland,CA,94666)
(2 rows)


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