create table t1(
id int unsigned auto_increment primary key,
x int unsigned,
y int unsigned,
sys_start SYS_DATATYPE as row start invisible,
sys_end SYS_DATATYPE as row end invisible,
period for system_time (sys_start, sys_end))
with system versioning;
create table t2(
id int unsigned auto_increment primary key,
x int unsigned,
y int unsigned);
insert into t1(x, y) values(1, 11);
insert into t2(x, y) values(1, 11);
insert into t1(x, y) values(2, 12);
insert into t2(x, y) values(2, 12);
insert into t1(x, y) values(3, 13);
insert into t2(x, y) values(3, 13);
insert into t1(x, y) values(4, 14);
insert into t2(x, y) values(4, 14);
insert into t1(x, y) values(5, 15);
insert into t2(x, y) values(5, 15);
insert into t1(x, y) values(6, 16);
insert into t2(x, y) values(6, 16);
insert into t1(x, y) values(7, 17);
insert into t2(x, y) values(7, 17);
insert into t1(x, y) values(8, 18);
insert into t2(x, y) values(8, 18);
insert into t1(x, y) values(9, 19);
insert into t2(x, y) values(9, 19);
select t1.x = t2.x and t1.y = t2.y as A, t1.x, t1.y, t2.x, t2.y from t1 inner join t2 on t1.id = t2.id;
A	x	y	x	y
1	1	11	1	11
1	2	12	2	12
1	3	13	3	13
1	4	14	4	14
1	5	15	5	15
1	6	16	6	16
1	7	17	7	17
1	8	18	8	18
1	9	19	9	19
delete from t1 where x = 2;
delete from t2 where x = 2;
select t1.x = t2.x and t1.y = t2.y as A, t1.x, t1.y, t2.x, t2.y from t1 inner join t2 on t1.id = t2.id;
A	x	y	x	y
1	1	11	1	11
1	3	13	3	13
1	4	14	4	14
1	5	15	5	15
1	6	16	6	16
1	7	17	7	17
1	8	18	8	18
1	9	19	9	19
delete from t1 where x > 7;
delete from t2 where x > 7;
select t1.x = t2.x and t1.y = t2.y as A, t1.x, t1.y, t2.x, t2.y from t1 inner join t2 on t1.id = t2.id;
A	x	y	x	y
1	1	11	1	11
1	3	13	3	13
1	4	14	4	14
1	5	15	5	15
1	6	16	6	16
1	7	17	7	17
drop table t1;
drop table t2;