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let type=time;
--source include/type_hrtime.inc
create table t1 (a time(4) not null, key(a));
insert into t1 values ('1:2:3.001'),('1:2:3'), ('-00:00:00.6'),('-00:00:00.7'),('-00:00:00.8'),('-00:00:00.9'),('-00:00:01.0'),('-00:00:01.1'),('-00:00:01.000000'),('-00:00:01.100001'),('-00:00:01.000002'),('-00:00:01.090000');
select * from t1 order by a;
select * from t1 order by a desc;
select min(a - interval 1 hour), max(a - interval 1 hour) from t1 where a < 0;
drop table t1;
select cast(1e-6 as time(6));
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