CAST in view definition returns string instead of NULL on warning and gives incorrect round

create view v1 as SELECT CAST('9999-12-31 23:59:59.123456' AS INTERVAL DAY_SECOND(6)) AS a, CAST('00:00:00.99' AS INTERVAL DAY_SECOND(6)) as b;

select * from v1;

drop view v1;

a	b

NULL	00:00:00.990000

Warnings:

Warning	1292	Incorrect INTERVAL DAY TO SECOND value: '9999-12-31 23:59:59.123456'

a	b

9999-12-31 23:59:59.1234	00:00:00.99

Warnings:

Warning	1292	Truncated incorrect CHAR(24) value: '9999-12-31 23:59:59.123456'