create table t1(
x int unsigned,
y int unsigned,
sys_trx_start SYS_DATATYPE as row start invisible,
sys_trx_end SYS_DATATYPE as row end invisible,
period for system_time (sys_trx_start, sys_trx_end))
with system versioning;
insert into t1(x, y) values (1, 1000), (2, 2000), (3, 3000), (4, 4000), (5, 5000), (6, 6000), (7, 7000), (8, 8000), (9, 9000);
select x, y from t1;
x	y
1	1000
2	2000
3	3000
4	4000
5	5000
6	6000
7	7000
8	8000
9	9000
update t1 set y = y + 1 where x > 7;
select x, y from t1;
x	y
1	1000
2	2000
3	3000
4	4000
5	5000
6	6000
7	7000
8	8001
9	9001
select x, y from t1 for system_time all;
x	y
1	1000
2	2000
3	3000
4	4000
5	5000
6	6000
7	7000
8	8001
9	9001
8	8000
9	9000
drop table t1;
create table t1 (
id bigint primary key,
x int,
y int without system versioning,
sys_trx_start SYS_DATATYPE as row start invisible,
sys_trx_end SYS_DATATYPE as row end invisible,
period for system_time (sys_trx_start, sys_trx_end))
with system versioning;
insert into t1 values(1, 1, 1);
set @ins_t= now(6);
select sys_trx_start into @tmp1 from t1;
update t1 set x= 11, y= 11 where id = 1;
select @tmp1 < sys_trx_start as A1, x, y from t1;
A1	x	y
1	11	11
select sys_trx_start into @tmp1 from t1;
update t1 set y= 1 where id = 1;
select @tmp1 = sys_trx_start as A2, x from t1;
A2	x
1	11
drop table t1;
create table t1 (
x int,
y int,
sys_trx_start SYS_DATATYPE as row start invisible,
sys_trx_end SYS_DATATYPE as row end invisible,
period for system_time (sys_trx_start, sys_trx_end)
) with system versioning;
insert into t1 (x, y) values (1, 1), (2, 1), (3, 1), (4, 1), (5, 1);
start transaction;
update t1 set y= y + 1 where x = 3;
update t1 set y= y + 1 where x = 2;
update t1 set y= y + 1 where x = 3;
update t1 set y= y + 1 where x > 3;
update t1 set y= y + 1 where x > 4;
commit;
select x, y, sys_trx_end = MAXVAL as current from t1 for system_time all;
x	y	current
1	1	1
2	2	1
3	3	1
4	2	1
5	3	1
3	1	0
2	1	0
3	2	0
4	1	0
5	1	0
5	2	0
drop table t1;
create table t1 (
id int primary key auto_increment,
x int,
sys_trx_start SYS_DATATYPE as row start invisible,
sys_trx_end SYS_DATATYPE as row end invisible,
period for system_time (sys_trx_start, sys_trx_end))
with system versioning;
set @t0= now(6);
insert into t1 (x) values (1);
set @t1= now(6);
update t1 set x= 2 where id = 1;
set @t2= now(6);
update t1 set x= 3 where id = 1;
select x from t1 for system_time as of timestamp @t0;
x
select x from t1 for system_time as of timestamp @t1;
x
1
select x from t1 for system_time as of timestamp @t2;
x
2
select x from t1 for system_time as of timestamp now(6);
x
3
drop table t1;
create table t1(
x int unsigned,
sys_trx_end SYS_DATATYPE as row end invisible,
sys_trx_start SYS_DATATYPE as row start invisible,
y int unsigned,
period for system_time (sys_trx_start, sys_trx_end),
primary key(x, y))
with system versioning;
insert into t1(x, y) values (1, 1000), (3, 3000), (4, 4000), (5, 5000);
insert into t1(x, y) values(3, 3000) on duplicate key update y = y+1;
insert into t1(x, y) values(4, 4444) on duplicate key update y = y+1;
select x, y from t1 for system_time all;
x	y
1	1000
3	3000
3	3001
4	4000
4	4444
5	5000
select x, y from t1;
x	y
1	1000
3	3001
4	4000
4	4444
5	5000
drop table t1;
create table t1 (
x int unsigned,
y int unsigned,
sys_trx_start SYS_DATATYPE as row start invisible,
sys_trx_end SYS_DATATYPE as row end invisible,
period for system_time (sys_trx_start, sys_trx_end))
with system versioning;
create table t2 like t1;
insert into t1(x, y) values (1, 1000), (2, 2000), (3, 3000), (4, 4000), (5, 5000), (6, 6000), (7, 7000), (8, 8000), (9, 9000);
insert into t2(x, y) values (1, 1010), (2, 2010), (3, 3010), (4, 4010), (5, 5010), (6, 6010), (7, 7010), (8, 8010), (9, 9010);
update t1, t2 set t1.y = t1.x + t1.y, t2.y = t2.x + t2.y where t1.x > 7 and t2.x < 7;
select x, y from t1 for system_time all;
x	y
1	1000
2	2000
3	3000
4	4000
5	5000
6	6000
7	7000
8	8008
9	9009
8	8000
9	9000
select x, y from t1;
x	y
1	1000
2	2000
3	3000
4	4000
5	5000
6	6000
7	7000
8	8008
9	9009
select x, y from t2 for system_time all;
x	y
1	1011
2	2012
3	3013
4	4014
5	5015
6	6016
7	7010
8	8010
9	9010
1	1010
2	2010
3	3010
4	4010
5	5010
6	6010
select x, y from t2;
x	y
1	1011
2	2012
3	3013
4	4014
5	5015
6	6016
7	7010
8	8010
9	9010
drop table t1;
drop table t2;
create table t1 (
id bigint primary key without system versioning,
name varchar(128),
salary bigint without system versioning,
sys_trx_start SYS_DATATYPE as row start invisible,
sys_trx_end SYS_DATATYPE as row end invisible,
period for system_time (sys_trx_start, sys_trx_end))
with system versioning;
create table t2 like t1;
insert into t1 values (1, "Jeremy", 3000);
insert into t2 values (1, "Jeremy", 4000);
select sys_trx_start into @tmp1 from t1;
select sys_trx_start into @tmp2 from t2;
update t1, t2 set t1.name= "Jerry", t2.name= "Jerry" where t1.id = t2.id and t1.name = "Jeremy";
select @tmp1 < sys_trx_start as A1, name from t1;
A1	name
1	Jerry
select @tmp2 < sys_trx_start as A2, name from t2;
A2	name
1	Jerry
select sys_trx_start into @tmp1 from t1;
select sys_trx_start into @tmp2 from t2;
update t1, t2 set t1.salary= 2500, t2.salary= 2500 where t1.id = t2.id and t1.name = "Jerry";
select @tmp1 = sys_trx_start as B1, salary from t1;
B1	salary
1	2500
select @tmp2 = sys_trx_start as B2, salary from t2;
B2	salary
1	2500
drop table t1;
drop table t2;