1create table t1(id int auto_increment primary key, handle int, data bigint not null default 0) engine = innodb; 2insert into t1(handle) values(12),(54),(NULL); 3select *, md5(handle) from t1; 4id handle data md5(handle) 51 12 0 c20ad4d76fe97759aa27a0c99bff6710 62 54 0 a684eceee76fc522773286a895bc8436 73 NULL 0 NULL 8alter table t1 add index handle(handle), algorithm=inplace; 9alter table t1 add column hash varchar(32) as (md5(handle)) persistent, algorithm=inplace; 10ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY 11alter table t1 add column hash varchar(32) as (md5(handle)) persistent, add unique index hash(hash), algorithm=inplace; 12ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY 13alter table t1 add column hash varchar(32) as (md5(handle)) persistent, add unique index hash(hash), algorithm=copy; 14select * from t1; 15id handle data hash 161 12 0 c20ad4d76fe97759aa27a0c99bff6710 172 54 0 a684eceee76fc522773286a895bc8436 183 NULL 0 NULL 19alter table t1 modify column hash varchar(32) as (md5(handle+1)) persistent, algorithm=inplace; 20ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY 21alter table t1 modify column hash varchar(32) as (md5(handle+1)) persistent, algorithm=copy; 22select * from t1; 23id handle data hash 241 12 0 c51ce410c124a10e0db5e4b97fc2af39 252 54 0 b53b3a3d6ab90ce0268229151c9bde11 263 NULL 0 NULL 27alter table t1 modify column handle int not null, algorithm=inplace; 28ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY 29SET STATEMENT sql_mode = 'NO_ENGINE_SUBSTITUTION' FOR 30alter table t1 modify column handle int not null, algorithm=copy; 31Warnings: 32Warning 1265 Data truncated for column 'handle' at row 3 33select * from t1; 34id handle data hash 351 12 0 c51ce410c124a10e0db5e4b97fc2af39 362 54 0 b53b3a3d6ab90ce0268229151c9bde11 373 0 0 c4ca4238a0b923820dcc509a6f75849b 38alter table t1 drop index handle, algorithm=inplace; 39create index data on t1(data) algorithm=inplace; 40alter table t1 drop column data, algorithm=inplace; 41alter table t1 add column sha varchar(32) as (sha1(handle)) persistent, algorithm=inplace; 42ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY 43alter table t1 add column sha varchar(32), algorithm=inplace; 44alter table t1 drop column hash, algorithm=inplace; 45drop table t1; 46