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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. 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=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
drop table t;
create temporary table t1 (a int, v int as (a));
alter table t1 change column a b int, algorithm=inplace;
ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY
show create table t1;
Table Create Table
t1 CREATE TEMPORARY TABLE `t1` (
`a` int(11) DEFAULT NULL,
`v` int(11) GENERATED ALWAYS AS (`a`) VIRTUAL
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
create temporary table t2 (a int, v int as (a));
lock table t2 write;
alter table t2 change column a b int, algorithm=inplace;
ERROR 0A000: ALGORITHM=INPLACE is not supported for this operation. Try ALGORITHM=COPY
show create table t2;
Table Create Table
t2 CREATE TEMPORARY TABLE `t2` (
`a` int(11) DEFAULT NULL,
`v` int(11) GENERATED ALWAYS AS (`a`) VIRTUAL
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
drop temporary table t1, t2;
create temporary table t1 (a int);
alter table t1 add column f text;
insert into t1 values ('x','foo');
ERROR 22007: Incorrect integer value: 'x' for column `test`.`t1`.`a` at row 1
drop temporary table t1;
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