EVOLUTION-MANAGER

Edit File: cte.test

-- source include/have_innodb.inc
set time_zone="+00:00";
set default_storage_engine=innodb;
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) not null,
  name varchar(100) not null,
  mgr int(10),
  salary int(10) not null,
  constraint `dept-emp-fk`
    foreign key (dept_id) references dept (dept_id)
      on delete cascade
      on update restrict,
  constraint `mgr-fk`
    foreign key (mgr) references emp (emp_id)
      on delete restrict
      on update restrict
) with system versioning;

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

insert into emp (emp_id, name, salary, dept_id, mgr) values
(1, "bill", 1000, 10, null),
(20, "john", 500, 10, 1),
(30, "jane", 750, 10,1 );

select row_start into @ts_1 from emp where name="jane";

update emp set mgr=30 where name ="john";

explain extended
with ancestors as (
  select e.emp_id, e.name, e.mgr, e.salary from emp as e where name = 'bill'
    union
  select e.emp_id, e.name, e.mgr, e.salary from emp as e
) select * from ancestors for system_time as of @ts_1;

select row_start into @ts_2 from emp where name="john";

let $q=
/* All report to 'Bill' */
with recursive
ancestors
as
(
  select e.emp_id, e.name, e.mgr, e.salary
  from emp for system_time as of timestamp @ts_1 as e
  where name = 'bill'
  union
  select e.emp_id, e.name, e.mgr, e.salary
  from emp for system_time as of timestamp @ts_1 as e,
       ancestors as a
  where e.mgr = a.emp_id
)
select * from ancestors;

eval explain extended $q;
eval $q;

let $q=with recursive
ancestors
as
(
  select e.emp_id, e.name, e.mgr, e.salary
  from emp as e
  where name = 'bill'
  union
  select e.emp_id, e.name, e.mgr, e.salary
  from emp as e,
       ancestors as a
  where e.mgr = a.emp_id
)
select * from ancestors for system_time as of timestamp @ts_1;

eval explain extended $q;
eval $q;

let $q=with recursive
ancestors
as
(
  select e.emp_id, e.name, e.mgr, e.salary
  from emp as e
  where name = 'bill'
  union
  select e.emp_id, e.name, e.mgr, e.salary
  from emp as e,
       ancestors as a
  where e.mgr = a.emp_id
)
select name from emp where emp_id in (select emp_id from ancestors for system_time as of timestamp @ts_1);

eval explain extended $q;
eval $q;

with recursive
ancestors
as
(
  select e.emp_id, e.name, e.mgr, e.salary
  from emp as e
  where name = 'bill'
  union
  select e.emp_id, e.name, e.mgr, e.salary
  from emp as e,
       ancestors as a
  where e.mgr = a.emp_id
)
select * from ancestors for system_time as of @ts_2,
              ancestors for system_time as of @ts_2 a2;

--error ER_CONFLICTING_FOR_SYSTEM_TIME
with recursive
ancestors
as
(
  select e.emp_id, e.name, e.mgr, e.salary
  from emp as e
  where name = 'bill'
  union
  select e.emp_id, e.name, e.mgr, e.salary
  from emp as e,
       ancestors as a
  where e.mgr = a.emp_id
)
select * from ancestors for system_time as of @ts_2,
              ancestors for system_time as of now() a2;

--error ER_CONFLICTING_FOR_SYSTEM_TIME
with recursive
ancestors
as
(
  select e.emp_id, e.name, e.mgr, e.salary
  from emp as e
  where name = 'bill'
  union
  select e.emp_id, e.name, e.mgr, e.salary
  from emp as e,
       ancestors as a
  where e.mgr = a.emp_id
)
select * from ancestors,
              ancestors for system_time as of @ts_2 a2;

--echo # SYSTEM_TIME to internal recursive instance is prohibited
--error ER_VERS_NOT_VERSIONED
with recursive cte as
(
  select * from emp
  union all
  select * from cte for system_time as of @ts_1
)
select * from cte;

create or replace table emp ( emp_id int, name varchar(127), mgr int) with system versioning;
create or replace table addr ( emp_id int, address varchar(100)) with system versioning;
insert emp values (1, 'bill', 0), (2, 'bill', 1), (3, 'kate', 1);
insert addr values (1, 'Moscow'), (2, 'New York'), (3, 'London');
set @ts=now(6);
delete from emp;
delete from addr;

with recursive
ancestors
as
(
  select e.emp_id, e.name, e.mgr
  from emp for system_time as of timestamp @ts as e
  where name = 'bill'
  union
  select ee.emp_id, ee.name, ee.mgr
  from emp for system_time as of timestamp @ts as ee, ancestors as a
  where ee.mgr = a.emp_id
)
select * from ancestors;

insert emp values (4, 'john', 1);
insert addr values (4, 'Paris');
with ancestors as (select * from emp natural join addr) select * from ancestors;
with ancestors as (select * from emp natural join addr) select * from ancestors for system_time all;
with ancestors as (select * from (select * from emp natural join addr) for system_time all as t) select * from ancestors;
select * from (select * from emp natural join addr) for system_time all as t;

drop table emp;
drop table dept;
drop table addr;