select @@versioning_alter_history;
@@versioning_alter_history
ERROR
create table t(
a int
);
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
alter table t drop system versioning;
ERROR HY000: Table `t` is not versioned
alter table t add system versioning;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `sys_trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
alter table t add column y int;
ERROR HY000: Not allowed for versioned `test`.`t`. Change `versioning_alter_history` to proceed with ALTER.
alter table t engine innodb;
ERROR HY000: Not allowed for versioned `test`.`t`. Change to/from native versioning engine is prohibited.
alter table t drop system versioning;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
set versioning_alter_history= keep;
alter table t
add column trx_start bigint(20) unsigned generated always as row start,
add column trx_end bigint(20) unsigned generated always as row end,
add period for system_time(trx_start, trx_end),
add system versioning;
ERROR HY000: `trx_start` must be of type TIMESTAMP(6) for versioned table `t`
alter table t
add column trx_start timestamp generated always as row start,
add column trx_end timestamp generated always as row end,
add period for system_time(trx_start, trx_end),
add system versioning;
ERROR HY000: `trx_start` must be of type TIMESTAMP(6) for versioned table `t`
alter table t
add column trx_start timestamp(6) not null generated always as row start,
add column trx_end timestamp(6) not null generated always as row end,
add period for system_time(trx_start, trx_end),
add system versioning;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'generated always as row start,
add column trx_end timestamp(6) not null generate' at line 2
alter table t
add column trx_start timestamp(6) generated always as row start,
add column trx_end timestamp(6) generated always as row end,
add period for system_time(trx_start, trx_end),
add system versioning;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  PERIOD FOR SYSTEM_TIME (`trx_start`, `trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
alter table t drop column trx_start, drop column trx_end;
alter table t drop system versioning;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
alter table t add system versioning;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `sys_trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
alter table t add column b int;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `sys_trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  `b` int(11) DEFAULT NULL,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
alter table t add column c int;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `sys_trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  `b` int(11) DEFAULT NULL,
  `c` int(11) DEFAULT NULL,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
alter table t add column d int first;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `d` int(11) DEFAULT NULL,
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `sys_trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  `b` int(11) DEFAULT NULL,
  `c` int(11) DEFAULT NULL,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
alter table t add column e int after d;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `d` int(11) DEFAULT NULL,
  `e` int(11) DEFAULT NULL,
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `sys_trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  `b` int(11) DEFAULT NULL,
  `c` int(11) DEFAULT NULL,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
alter table t drop column a;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `d` int(11) DEFAULT NULL,
  `e` int(11) DEFAULT NULL,
  `sys_trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `sys_trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  `b` int(11) DEFAULT NULL,
  `c` int(11) DEFAULT NULL,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
create or replace table t (
a int,
sys_trx_start timestamp(6) generated always as row start,
sys_trx_end timestamp(6) generated always as row end,
period for system_time(sys_trx_start, sys_trx_end))
with system versioning;
select * from t for system_time all;
a	sys_trx_start	sys_trx_end
alter table t drop column sys_trx_start;
alter table t drop column sys_trx_end;
select * from t for system_time all;
a
alter table t drop column sys_trx_start;
ERROR 42000: Can't DROP COLUMN `sys_trx_start`; check that it exists
alter table t drop column sys_trx_end;
ERROR 42000: Can't DROP COLUMN `sys_trx_end`; check that it exists
create or replace table t (
a int,
sys_trx_start timestamp(6) generated always as row start,
sys_trx_end timestamp(6) generated always as row end,
period for system_time(sys_trx_start, sys_trx_end))
with system versioning;
select * from t for system_time all;
a	sys_trx_start	sys_trx_end
alter table t drop column sys_trx_start, drop column sys_trx_end;
select * from t for system_time all;
a
create or replace table t(
a int
);
insert into t values(1);
alter table t add system versioning;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `sys_trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
insert into t values(2);
select * from t for system_time all;
a
1
2
select * from t;
a
1
2
update t set a=3 where a=1;
select * from t;
a
3
2
select * from t for system_time all;
a
3
2
1
select sys_trx_start from t where a=3 into @tm;
alter table t add column b int;
select @tm=sys_trx_start from t where a=3;
@tm=sys_trx_start
1
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `sys_trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  `b` int(11) DEFAULT NULL,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
select * from t;
a	b
3	NULL
2	NULL
select * from t for system_time all;
a	b
3	NULL
2	NULL
1	NULL
alter table t drop system versioning;
select * from t;
a	b
3	NULL
2	NULL
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `b` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
alter table t modify a int with system versioning;
ERROR HY000: Table `t` is not versioned
alter table t modify a int without system versioning;
ERROR HY000: Table `t` is not versioned
alter table t add system versioning;
alter table t modify a int without system versioning;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL WITHOUT SYSTEM VERSIONING,
  `b` int(11) DEFAULT NULL,
  `sys_trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `sys_trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
alter table t modify a int with system versioning;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `b` int(11) DEFAULT NULL,
  `sys_trx_start` timestamp(6) GENERATED ALWAYS AS ROW START,
  `sys_trx_end` timestamp(6) GENERATED ALWAYS AS ROW END,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
create or replace table t(
a int
) engine=innodb;
insert into t values(1);
select * from t;
a
1
alter table t
add column trx_start timestamp(6) generated always as row start,
add column trx_end timestamp(6) generated always as row end,
add period for system_time(trx_start, trx_end),
add system versioning;
ERROR HY000: `trx_start` must be of type BIGINT(20) UNSIGNED for versioned table `t`
call verify_vtq;
No	A	B	C	D
alter table t
add column trx_start bigint(20) unsigned generated always as row start,
add column trx_end bigint(20) unsigned generated always as row end,
add period for system_time(trx_start, trx_end),
add system versioning;
call verify_vtq;
No	A	B	C	D
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `trx_start` bigint(20) unsigned GENERATED ALWAYS AS ROW START,
  `trx_end` bigint(20) unsigned GENERATED ALWAYS AS ROW END,
  PERIOD FOR SYSTEM_TIME (`trx_start`, `trx_end`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
alter table t drop column trx_start, drop column trx_end;
call verify_vtq;
No	A	B	C	D
alter table t drop system versioning, algorithm=copy;
call verify_vtq;
No	A	B	C	D
alter table t add system versioning, algorithm=copy;
call verify_vtq;
No	A	B	C	D
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` bigint(20) unsigned GENERATED ALWAYS AS ROW START,
  `sys_trx_end` bigint(20) unsigned GENERATED ALWAYS AS ROW END,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
update t set a= 2;
select * from t for system_time all;
a
2
1
call verify_vtq;
No	A	B	C	D
1	1	1	1	1
alter table t add column b int, algorithm=copy;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` bigint(20) unsigned GENERATED ALWAYS AS ROW START,
  `sys_trx_end` bigint(20) unsigned GENERATED ALWAYS AS ROW END,
  `b` int(11) DEFAULT NULL,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
select * from t;
a	b
2	NULL
call verify_vtq;
No	A	B	C	D
alter table t drop column b, algorithm=copy;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` bigint(20) unsigned GENERATED ALWAYS AS ROW START,
  `sys_trx_end` bigint(20) unsigned GENERATED ALWAYS AS ROW END,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
select * from t for system_time all;
a
2
1
call verify_vtq;
No	A	B	C	D
alter table t drop system versioning, algorithm=inplace;
call verify_vtq;
No	A	B	C	D
alter table t add system versioning, algorithm=inplace;
call verify_vtq;
No	A	B	C	D
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` bigint(20) unsigned GENERATED ALWAYS AS ROW START,
  `sys_trx_end` bigint(20) unsigned GENERATED ALWAYS AS ROW END,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
update t set a= 1;
select * from t for system_time all;
a
1
2
call verify_vtq;
No	A	B	C	D
1	1	1	1	1
alter table t add column b int, algorithm=inplace;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` bigint(20) unsigned GENERATED ALWAYS AS ROW START,
  `sys_trx_end` bigint(20) unsigned GENERATED ALWAYS AS ROW END,
  `b` int(11) DEFAULT NULL,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
select * from t;
a	b
1	NULL
call verify_vtq;
No	A	B	C	D
alter table t drop column b, algorithm=inplace;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL,
  `sys_trx_start` bigint(20) unsigned GENERATED ALWAYS AS ROW START,
  `sys_trx_end` bigint(20) unsigned GENERATED ALWAYS AS ROW END,
  PERIOD FOR SYSTEM_TIME (`sys_trx_start`, `sys_trx_end`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
select * from t for system_time all;
a
1
2
alter table t drop system versioning, algorithm=copy;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1
call verify_vtq;
No	A	B	C	D
create or replace table t (a int);
insert t values (1),(2),(3),(4);
alter table t add b int auto_increment null unique;
select * from t;
a	b
1	1
2	2
3	3
4	4
drop table t;
create or replace table t (a int) with system versioning engine=innodb;
insert into t values (1), (2), (3);
delete from t where a<3;
call verify_vtq;
No	A	B	C	D
1	1	1	1	1
2	1	1	1	1
alter table t add b int not null unique;
ERROR 23000: Duplicate entry '...' for key 'b'
alter table t add b int auto_increment unique;
ERROR 42000: Table 'test/t' uses an extension that doesn't exist in this MariaDB version
alter table t add b int auto_increment null unique;
call verify_vtq;
No	A	B	C	D
select * from t;
a	b
3	1
select * from t for system_time all;
a	b
1	NULL
2	NULL
3	1
insert into t values (4, 0);
select * from t for system_time all;
a	b
1	NULL
2	NULL
3	1
4	2
call verify_vtq;
No	A	B	C	D
1	1	1	1	1
create or replace table t (a int) with system versioning;
insert into t values (1), (2), (3);
delete from t where a<3;
alter table t add b int not null unique;
ERROR 23000: Duplicate entry '...' for key 'b'
alter table t add b int auto_increment unique;
ERROR 42000: Table '#sql-temporary' uses an extension that doesn't exist in this MariaDB version
alter table t add b int auto_increment null unique;
select * from t;
a	b
3	1
select * from t for system_time all;
a	b
1	NULL
2	NULL
3	1
insert into t values (4, 0);
select * from t for system_time all;
a	b
1	NULL
2	NULL
3	1
4	2
create or replace table t (
a int,
sys_trx_start bigint(20) unsigned generated always as row start,
sys_trx_end bigint(20) unsigned generated always as row end,
period for system_time(sys_trx_start, sys_trx_end)
) with system versioning engine innodb;
alter table t change column sys_trx_start asdf bigint unsigned;
ERROR HY000: Can not change system versioning field `sys_trx_start`
create or replace table t (
a int,
sys_trx_start timestamp(6) generated always as row start,
sys_trx_end timestamp(6) generated always as row end,
period for system_time(sys_trx_start, sys_trx_end)
) with system versioning engine myisam;
alter table t change column sys_trx_start asdf timestamp(6);
ERROR HY000: Can not change system versioning field `sys_trx_start`
create or replace table t (
a int,
sys_trx_start timestamp(6) generated always as row start,
sys_trx_end timestamp(6) generated always as row end,
period for system_time(sys_trx_start, sys_trx_end)
) with system versioning;
select * from t;
a	sys_trx_start	sys_trx_end
alter table t drop system versioning;
ERROR HY000: System versioning field `sys_trx_start` is not hidden
alter table t drop column sys_trx_start;
select * from t;
a	sys_trx_end
alter table t drop system versioning;
ERROR HY000: System versioning field `sys_trx_end` is not hidden
alter table t drop column sys_trx_end;
select * from t;
a
alter table t drop system versioning;
show create table t;
Table	Create Table
t	CREATE TABLE `t` (
  `a` int(11) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
set versioning_alter_history= SURVIVE;
ERROR 42000: Variable 'versioning_alter_history' can't be set to the value of 'SURVIVE'
set versioning_alter_history= DROP;
ERROR 42000: Variable 'versioning_alter_history' can't be set to the value of 'DROP'
drop database test;
create database test;