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 without system versioning;
ERROR HY000: Wrong parameters for `t`: table is not versioned
alter table t with system versioning without system versioning;
ERROR HY000: Wrong parameters for `t`: multiple 'WITH/WITHOUT SYSTEM VERSIONING'
alter table t with 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 without 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 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),
with 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),
with 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),
with 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),
with 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 without 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 with 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 with 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 without 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: Wrong parameters for `t`: table is not versioned
alter table t modify a int with system versioning with system versioning;
ERROR HY000: Wrong parameters for `t`: multiple 'WITH/WITHOUT SYSTEM VERSIONING' for `a`
alter table t modify a int with system versioning without system versioning;
ERROR HY000: Wrong parameters for `t`: multiple 'WITH/WITHOUT SYSTEM VERSIONING' for `a`
alter table t with 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
set @@session.time_zone='+00:00';
select ifnull(max(transaction_id), 0) into @start_trx_id from information_schema.innodb_vtq;
create procedure if not exists verify_vtq()
begin
set @i= 0;
select
@i:= @i + 1 as No,
transaction_id > 0 as A,
commit_id > transaction_id as B,
begin_timestamp > '1-1-1 0:0:0' as C,
commit_timestamp >= begin_timestamp as D
from information_schema.innodb_vtq
where transaction_id > @start_trx_id;
select ifnull(max(transaction_id), 0)
into @start_trx_id
from information_schema.innodb_vtq;
end~~
create function if not exists default_engine()
returns varchar(255)
deterministic
begin
declare e varchar(255);
select lower(engine) from information_schema.engines where support='DEFAULT' into e;
return e;
end~~
create function if not exists sys_datatype()
returns varchar(255)
deterministic
begin
if default_engine() = 'innodb' then
return 'bigint unsigned';
elseif default_engine() = 'myisam' then
return 'timestamp(6)';
end if;
return NULL;
end~~
create function if not exists sys_commit_ts(sys_field varchar(255))
returns varchar(255)
deterministic
begin
if default_engine() = 'innodb' then
return concat('vtq_commit_ts(', sys_field, ')');
elseif default_engine() = 'myisam' then
return sys_field;
end if;
return NULL;
end~~
create procedure if not exists innodb_verify_vtq(recs int)
begin
declare i int default 1;
if default_engine() = 'innodb' then
call verify_vtq;
elseif default_engine() = 'myisam' then
create temporary table tmp (No int, A bool, B bool, C bool, D bool);
while i <= recs do
insert into tmp values (i, 1, 1, 1, 1);
set i= i + 1;
end while;
select * from tmp;
drop table tmp;
end if;
end~~
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),
with system versioning;
ERROR HY000: `trx_start` must be of type `BIGINT(20) UNSIGNED` for versioned table `t`
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),
with system versioning;
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 without system versioning;
alter table t with system versioning, 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
update t set a=2;
select * from t for system_time all;
a
2
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
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
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
2	NULL
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
2
1
alter table t without 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
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;
alter table t add b int auto_increment unique;
select * from t for system_time all;
a	b
1	-1
2	-2
3	1
insert into t values (4, NULL);
select * from t for system_time all;
a	b
1	-1
2	-2
3	1
4	2
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 auto_increment unique;
select * from t for system_time all;
a	b
1	-1
2	-2
3	1
insert into t values (4, NULL);
select * from t for system_time all;
a	b
1	-1
2	-2
3	1
4	2
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;
alter table t add b tinyint auto_increment unique;
select * from t for system_time all;
a	b
1	-1
2	-2
3	1
insert into t values (4, NULL);
select * from t for system_time all;
a	b
1	-1
2	-2
3	1
4	2
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 tinyint auto_increment unique;
select * from t for system_time all;
a	b
1	-1
2	-2
3	1
insert into t values (4, NULL);
select * from t for system_time all;
a	b
1	-1
2	-2
3	1
4	2
create or replace table t (a int) engine innodb;
insert into t values (1);
alter table t with system versioning, algorithm=inplace;
select * from t for system_time all;
a
1
update t set a=2;
select * from t for system_time all;
a
2
1
alter table t add column b int, algorithm=inplace;
select * from t for system_time all;
a	b
2	NULL
1	NULL
alter table t without system versioning, algorithm=inplace;
select * from t;
a	b
2	NULL
call verify_vtq;
No	A	B	C	D
1	1	1	1	1
2	1	1	1	1
3	1	1	1	1
4	1	1	1	1
5	1	1	1	1
6	1	1	1	1
7	1	1	1	1
8	1	1	1	1
9	1	1	1	1
10	1	1	1	1
11	1	1	1	1
drop table t;
drop procedure verify_vtq;
drop procedure innodb_verify_vtq;
drop function default_engine;
drop function sys_commit_ts;
drop function sys_datatype;