mirror of
https://github.com/MariaDB/server.git
synced 2025-10-27 08:58:13 +01:00
75 lines
1.8 KiB
Text
75 lines
1.8 KiB
Text
create table t (
|
|
a int,
|
|
b int without system versioning
|
|
) with system versioning;
|
|
insert into t values(1, 2);
|
|
insert into t values(3, 4);
|
|
select * from t;
|
|
a b
|
|
1 2
|
|
3 4
|
|
select a from t for system_time as of timestamp now(6);
|
|
a
|
|
1
|
|
3
|
|
select a, b, b+0 from t for system_time as of timestamp now(6);
|
|
a b b+0
|
|
1 2 2
|
|
3 4 4
|
|
select * from t for system_time as of timestamp now(6);
|
|
a b
|
|
1 2
|
|
3 4
|
|
select count(*) from t for system_time as of timestamp now(6) group by b;
|
|
count(*)
|
|
1
|
|
1
|
|
select * from t for system_time as of timestamp now(6) order by b asc;
|
|
a b
|
|
1 2
|
|
3 4
|
|
select * from t for system_time as of timestamp now(6) order by b desc;
|
|
a b
|
|
3 4
|
|
1 2
|
|
select * from t for system_time as of timestamp now(6) group by a having a=2;
|
|
a b
|
|
select * from t for system_time as of timestamp now(6) group by b having b=2;
|
|
a b
|
|
1 2
|
|
select a from t for system_time as of timestamp now(6) where b=2;
|
|
a
|
|
1
|
|
select a from t for system_time as of timestamp now(6) where b=NULL;
|
|
a
|
|
select a from t for system_time as of timestamp now(6) where b is NULL;
|
|
a
|
|
select count(*), b from t for system_time as of timestamp now(6) group by b having b=NULL;
|
|
count(*) b
|
|
select a, b from t;
|
|
a b
|
|
1 2
|
|
3 4
|
|
create or replace table t (
|
|
a int,
|
|
b int not null without system versioning
|
|
) with system versioning;
|
|
insert into t values (1, 2), (3, 4);
|
|
select * from t for system_time as of timestamp now(6);
|
|
a b
|
|
1 2
|
|
3 4
|
|
select * from t for system_time as of timestamp now(6) where b is NULL;
|
|
a b
|
|
create or replace table t (x int with system versioning, y int);
|
|
select column_name, extra from information_schema.columns where table_name='t';
|
|
column_name extra
|
|
x
|
|
y WITHOUT SYSTEM VERSIONING
|
|
show create table t;
|
|
Table Create Table
|
|
t CREATE TABLE `t` (
|
|
`x` int(11) DEFAULT NULL,
|
|
`y` int(11) DEFAULT NULL WITHOUT SYSTEM VERSIONING
|
|
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci WITH SYSTEM VERSIONING
|
|
drop table t;
|