create table t (a int, v int as (a)) engine=innodb;
alter table t change column a b tinyint, algorithm=inplace;
ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: Cannot change column type INPLACE. Try ALGORITHM=COPY
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `v` int(11) GENERATED ALWAYS AS (`a`) VIRTUAL
) ENGINE=InnoDB DEFAULT CHARSET=latin1
drop table t;