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75 lines
1.8 KiB
Text
75 lines
1.8 KiB
Text
create table t (
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a int,
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b int without system versioning
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) with system versioning;
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insert into t values(1, 2);
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insert into t values(3, 4);
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select * from t;
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a b
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1 2
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3 4
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select a from t for system_time as of timestamp now(6);
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a
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1
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3
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select a, b, b+0 from t for system_time as of timestamp now(6);
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a b b+0
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1 2 2
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3 4 4
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select * from t for system_time as of timestamp now(6);
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a b
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1 2
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3 4
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select count(*) from t for system_time as of timestamp now(6) group by b;
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count(*)
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1
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1
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select * from t for system_time as of timestamp now(6) order by b asc;
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a b
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1 2
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3 4
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select * from t for system_time as of timestamp now(6) order by b desc;
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a b
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3 4
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1 2
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select * from t for system_time as of timestamp now(6) group by a having a=2;
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a b
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select * from t for system_time as of timestamp now(6) group by b having b=2;
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a b
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1 2
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select a from t for system_time as of timestamp now(6) where b=2;
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a
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1
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select a from t for system_time as of timestamp now(6) where b=NULL;
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a
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select a from t for system_time as of timestamp now(6) where b is NULL;
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a
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select count(*), b from t for system_time as of timestamp now(6) group by b having b=NULL;
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count(*) b
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select a, b from t;
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a b
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1 2
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3 4
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create or replace table t (
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a int,
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b int not null without system versioning
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) with system versioning;
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insert into t values (1, 2), (3, 4);
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select * from t for system_time as of timestamp now(6);
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a b
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1 2
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3 4
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select * from t for system_time as of timestamp now(6) where b is NULL;
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a b
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create or replace table t (x int with system versioning, y int);
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select column_name, extra from information_schema.columns where table_name='t';
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column_name extra
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x
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y WITHOUT SYSTEM VERSIONING
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show create table t;
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Table Create Table
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t CREATE TABLE `t` (
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`x` int(11) DEFAULT NULL,
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`y` int(11) DEFAULT NULL WITHOUT SYSTEM VERSIONING
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) ENGINE=MyISAM DEFAULT CHARSET=latin1 WITH SYSTEM VERSIONING
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drop table t;
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