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71 lines
2.2 KiB
Text
71 lines
2.2 KiB
Text
create or replace table dept (
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dept_id int(10) primary key,
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name varchar(100)
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)
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with system versioning;
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create or replace table emp (
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emp_id int(10) primary key,
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dept_id int(10),
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name varchar(100),
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salary int(10),
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constraint `dept-emp-fk`
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foreign key (dept_id) references dept (dept_id)
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on delete cascade
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on update restrict
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)
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with system versioning;
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select now() into @ts_0;
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insert into dept (dept_id, name) values (10, "accounting");
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commit;
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select vtq_commit_ts(sys_trx_start) into @ts_1 from dept where dept_id=10;
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insert into emp (emp_id, name, salary, dept_id) values (1, "bill", 1000, 10);
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commit;
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select vtq_commit_ts(sys_trx_start) into @ts_2 from emp where name="bill";
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select * from emp;
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emp_id dept_id name salary
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1 10 bill 1000
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update emp set salary=2000 where name="bill";
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commit;
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select vtq_commit_ts(sys_trx_start) into @ts_3 from emp where name="bill";
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select * from emp;
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emp_id dept_id name salary
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1 10 bill 2000
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select * from emp for system_time as of timestamp @ts_2;
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emp_id dept_id name salary
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1 10 bill 1000
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select * from emp for system_time as of timestamp @ts_3;
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emp_id dept_id name salary
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1 10 bill 2000
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select * from emp e, dept d
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where d.dept_id = 10
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and d.dept_id = e.dept_id;
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emp_id dept_id name salary dept_id name
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1 10 bill 2000 10 accounting
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select * from emp e, dept d
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where d.dept_id = 10
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and d.dept_id = e.dept_id
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query for system_time from timestamp @ts_1 to timestamp @ts_2;
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emp_id dept_id name salary sys_trx_start sys_trx_end dept_id name sys_trx_start sys_trx_end
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select * from emp e, dept d
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where d.dept_id = 10
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and d.dept_id = e.dept_id
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query for system_time as of timestamp @ts_0;
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emp_id dept_id name salary dept_id name
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select * from emp e, dept d
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where d.dept_id = 10
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and d.dept_id = e.dept_id
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query for system_time as of timestamp @ts_1;
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emp_id dept_id name salary dept_id name
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select * from emp e, dept d
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where d.dept_id = 10
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and d.dept_id = e.dept_id
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query for system_time as of timestamp @ts_2;
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emp_id dept_id name salary dept_id name
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1 10 bill 1000 10 accounting
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select * from emp e, dept d
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where d.dept_id = 10
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and d.dept_id = e.dept_id
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query for system_time as of timestamp @ts_3;
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emp_id dept_id name salary dept_id name
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1 10 bill 2000 10 accounting
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drop table emp, dept;
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