create or replace table dept (
  dept_id int(10) primary key, 
  name varchar(100)
)
with system versioning;

create or replace table emp (
  emp_id int(10) primary key,
  dept_id int(10),
  name varchar(100),
  salary int(10),
  constraint `dept-emp-fk`
    foreign key (dept_id) references dept (dept_id)
		on delete cascade
		on update restrict
) 
with system versioning;

select now() into @ts_0;

insert into dept (dept_id, name) values (10, "accounting");
commit;

select vtq_commit_ts(sys_trx_start) into @ts_1 from dept where dept_id=10;

insert into emp (emp_id, name, salary, dept_id) values (1, "bill", 1000, 10);
commit;

select vtq_commit_ts(sys_trx_start) into @ts_2 from emp where name="bill";

select * from emp;

update emp set salary=2000 where name="bill";
commit;

select vtq_commit_ts(sys_trx_start) into @ts_3 from emp where name="bill";

select * from emp;
select * from emp for system_time as of timestamp @ts_2;
select * from emp for system_time as of timestamp @ts_3;
select * from emp e, dept d
where d.dept_id = 10
  and d.dept_id = e.dept_id;

select * from emp e, dept d
where d.dept_id = 10
  and d.dept_id = e.dept_id
system_time from timestamp @ts_1 to timestamp @ts_2;

select * from emp e, dept d
where d.dept_id = 10
  and d.dept_id = e.dept_id
system_time as of timestamp @ts_0;

select * from emp e, dept d
where d.dept_id = 10
  and d.dept_id = e.dept_id
system_time as of timestamp @ts_1;

select * from emp e, dept d
where d.dept_id = 10
  and d.dept_id = e.dept_id
system_time as of timestamp @ts_2;

select * from emp e, dept d
where d.dept_id = 10
  and d.dept_id = e.dept_id
system_time as of timestamp @ts_3;

drop table emp, dept;