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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 order by x, y;
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 order by x, y;
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 order by sys_trx_end, x, y;
x y
8 8000
9 9000
1 1000
2 2000
3 3000
4 4000
5 5000
6 6000
7 7000
8 8001
9 9001
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 order by sys_trx_end, x, y;
x y current
3 1 0
2 1 0
3 2 0
4 1 0
5 1 0
5 2 0
1 1 1
2 2 1
3 3 1
4 2 1
5 3 1
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 order by sys_trx_end, x, y;
x y
3 3000
1 1000
3 3001
4 4000
4 4444
5 5000
select x, y from t1 order by x, y;
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 order by sys_trx_end, x, y;
x y
8 8000
9 9000
1 1000
2 2000
3 3000
4 4000
5 5000
6 6000
7 7000
8 8008
9 9009
select x, y from t1 order by x, y;
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 order by sys_trx_end, x, y;
x y
1 1010
2 2010
3 3010
4 4010
5 5010
6 6010
1 1011
2 2012
3 3013
4 4014
5 5015
6 6016
7 7010
8 8010
9 9010
select x, y from t2 order by x, y;
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;
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