mirror of
https://github.com/MariaDB/server.git
synced 2025-01-30 18:41:56 +01:00
313 lines
12 KiB
Text
313 lines
12 KiB
Text
set time_zone="+00:00";
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set default_storage_engine=innodb;
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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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) 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) not null,
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name varchar(100) not null,
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mgr int(10),
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salary int(10) not null,
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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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constraint `mgr-fk`
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foreign key (mgr) references emp (emp_id)
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on delete restrict
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on update restrict
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) with system versioning;
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insert into dept (dept_id, name) values (10, "accounting");
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insert into emp (emp_id, name, salary, dept_id, mgr) values
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(1, "bill", 1000, 10, null),
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(20, "john", 500, 10, 1),
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(30, "jane", 750, 10,1 );
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select row_start into @ts_1 from emp where name="jane";
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update emp set mgr=30 where name ="john";
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explain extended
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with ancestors as (
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select e.emp_id, e.name, e.mgr, e.salary from emp as e where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary from emp as e
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) select * from ancestors for system_time as of @ts_1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 8 100.00
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2 DERIVED e ALL NULL NULL NULL NULL 4 100.00 Using where
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3 UNION e ALL NULL NULL NULL NULL 4 100.00 Using where
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NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 with ancestors as (/* select#2 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` where `test`.`e`.`name` = 'bill' and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1` union /* select#3 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` where `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1`)/* select#1 */ select `ancestors`.`emp_id` AS `emp_id`,`ancestors`.`name` AS `name`,`ancestors`.`mgr` AS `mgr`,`ancestors`.`salary` AS `salary` from `ancestors`
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select row_start into @ts_2 from emp where name="john";
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explain extended /* All report to 'Bill' */
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with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr, e.salary
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from emp for system_time as of timestamp @ts_1 as e
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where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary
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from emp for system_time as of timestamp @ts_1 as e,
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ancestors as a
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where e.mgr = a.emp_id
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)
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select * from ancestors;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 100.00
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2 DERIVED e ALL NULL NULL NULL NULL 4 100.00 Using where
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3 RECURSIVE UNION e ALL mgr-fk NULL NULL NULL 4 100.00 Using where
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3 RECURSIVE UNION <derived2> ref key0 key0 5 test.e.mgr 2 100.00
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NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 with recursive ancestors as (/* select#2 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` where `test`.`e`.`name` = 'bill' and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1` union /* select#3 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` join `ancestors` `a` where `a`.`emp_id` = `test`.`e`.`mgr` and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1`)/* select#1 */ select `ancestors`.`emp_id` AS `emp_id`,`ancestors`.`name` AS `name`,`ancestors`.`mgr` AS `mgr`,`ancestors`.`salary` AS `salary` from `ancestors`
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/* All report to 'Bill' */
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with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr, e.salary
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from emp for system_time as of timestamp @ts_1 as e
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where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary
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from emp for system_time as of timestamp @ts_1 as e,
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ancestors as a
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where e.mgr = a.emp_id
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)
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select * from ancestors;
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emp_id name mgr salary
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1 bill NULL 1000
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20 john 1 500
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30 jane 1 750
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explain extended with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e
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where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e,
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ancestors as a
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where e.mgr = a.emp_id
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)
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select * from ancestors for system_time as of timestamp @ts_1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 100.00
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2 DERIVED e ALL NULL NULL NULL NULL 4 100.00 Using where
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3 RECURSIVE UNION e ALL mgr-fk NULL NULL NULL 4 100.00 Using where
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3 RECURSIVE UNION <derived2> ref key0 key0 5 test.e.mgr 2 100.00
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NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 with recursive ancestors as (/* select#2 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` where `test`.`e`.`name` = 'bill' and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1` union /* select#3 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` join `ancestors` `a` where `a`.`emp_id` = `test`.`e`.`mgr` and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1`)/* select#1 */ select `ancestors`.`emp_id` AS `emp_id`,`ancestors`.`name` AS `name`,`ancestors`.`mgr` AS `mgr`,`ancestors`.`salary` AS `salary` from `ancestors`
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with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e
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where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e,
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ancestors as a
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where e.mgr = a.emp_id
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)
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select * from ancestors for system_time as of timestamp @ts_1;
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emp_id name mgr salary
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1 bill NULL 1000
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20 john 1 500
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30 jane 1 750
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explain extended with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e
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where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e,
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ancestors as a
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where e.mgr = a.emp_id
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)
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select name from emp where emp_id in (select emp_id from ancestors for system_time as of timestamp @ts_1);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY emp ALL PRIMARY NULL NULL NULL 4 100.00 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.emp.emp_id 2 100.00 FirstMatch(emp)
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2 DERIVED e ALL NULL NULL NULL NULL 4 100.00 Using where
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3 RECURSIVE UNION e ALL mgr-fk NULL NULL NULL 4 100.00 Using where
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3 RECURSIVE UNION <derived2> ref key0 key0 5 test.e.mgr 2 100.00
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NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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Note 1003 with recursive ancestors as (/* select#2 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` where `test`.`e`.`name` = 'bill' and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1` union /* select#3 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` join `ancestors` `a` where `a`.`emp_id` = `test`.`e`.`mgr` and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1`)/* select#1 */ select `test`.`emp`.`name` AS `name` from `test`.`emp` semi join (`ancestors`) where `ancestors`.`emp_id` = `test`.`emp`.`emp_id` and `test`.`emp`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999'
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with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e
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where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e,
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ancestors as a
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where e.mgr = a.emp_id
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)
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select name from emp where emp_id in (select emp_id from ancestors for system_time as of timestamp @ts_1);
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name
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bill
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john
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jane
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with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e
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where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e,
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ancestors as a
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where e.mgr = a.emp_id
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)
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select * from ancestors for system_time as of @ts_2,
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ancestors for system_time as of @ts_2 a2;
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emp_id name mgr salary emp_id name mgr salary
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1 bill NULL 1000 1 bill NULL 1000
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30 jane 1 750 1 bill NULL 1000
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20 john 30 500 1 bill NULL 1000
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1 bill NULL 1000 30 jane 1 750
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30 jane 1 750 30 jane 1 750
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20 john 30 500 30 jane 1 750
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1 bill NULL 1000 20 john 30 500
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30 jane 1 750 20 john 30 500
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20 john 30 500 20 john 30 500
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with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e
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where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e,
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ancestors as a
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where e.mgr = a.emp_id
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)
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select * from ancestors for system_time as of @ts_2,
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ancestors for system_time as of now() a2;
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ERROR HY000: Conflicting FOR SYSTEM_TIME clauses in WITH RECURSIVE
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with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e
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where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e,
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ancestors as a
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where e.mgr = a.emp_id
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)
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select * from ancestors,
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ancestors for system_time as of @ts_2 a2;
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ERROR HY000: Conflicting FOR SYSTEM_TIME clauses in WITH RECURSIVE
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with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e
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where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e,
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ancestors as a
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where e.mgr = a.emp_id
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)
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select * from ancestors for system_time as of @ts_2,
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ancestors a2;
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ERROR HY000: Conflicting FOR SYSTEM_TIME clauses in WITH RECURSIVE
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with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e
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where name = 'bill'
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union
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select e.emp_id, e.name, e.mgr, e.salary
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from emp as e,
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ancestors as a
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where e.mgr = a.emp_id
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)
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select * from ancestors for system_time as of @ts_2
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where emp_id in (select * from ancestors);
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ERROR HY000: Conflicting FOR SYSTEM_TIME clauses in WITH RECURSIVE
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# SYSTEM_TIME to internal recursive instance is prohibited
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with recursive cte as
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(
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select * from emp
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union all
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select * from cte for system_time as of @ts_1
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)
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select * from cte;
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ERROR HY000: Table `cte` is not system-versioned
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create or replace table emp ( emp_id int, name varchar(127), mgr int) with system versioning;
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create or replace table addr ( emp_id int, address varchar(100)) with system versioning;
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insert emp values (1, 'bill', 0), (2, 'bill', 1), (3, 'kate', 1);
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insert addr values (1, 'Moscow'), (2, 'New York'), (3, 'London');
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set @ts=now(6);
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delete from emp;
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delete from addr;
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with recursive
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ancestors
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as
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(
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select e.emp_id, e.name, e.mgr
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from emp for system_time as of timestamp @ts as e
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where name = 'bill'
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union
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select ee.emp_id, ee.name, ee.mgr
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from emp for system_time as of timestamp @ts as ee, ancestors as a
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where ee.mgr = a.emp_id
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)
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select * from ancestors;
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emp_id name mgr
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1 bill 0
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2 bill 1
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3 kate 1
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insert emp values (4, 'john', 1);
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insert addr values (4, 'Paris');
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with ancestors as (select * from emp natural join addr) select * from ancestors;
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emp_id name mgr address
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4 john 1 Paris
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with ancestors as (select * from emp natural join addr) select * from ancestors for system_time all;
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emp_id name mgr address
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1 bill 0 Moscow
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2 bill 1 New York
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3 kate 1 London
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4 john 1 Paris
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with ancestors as (select * from (select * from emp natural join addr) for system_time all as t) select * from ancestors;
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emp_id name mgr address
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1 bill 0 Moscow
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2 bill 1 New York
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3 kate 1 London
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4 john 1 Paris
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select * from (select * from emp natural join addr) for system_time all as t;
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emp_id name mgr address
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1 bill 0 Moscow
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2 bill 1 New York
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3 kate 1 London
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4 john 1 Paris
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drop table emp;
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drop table dept;
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drop table addr;
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