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create table t (a int);
truncate t for system_time all;
ERROR HY000: Unused clause: 'SYSTEM_TIME'
create procedure truncate_history_of_t()
begin
prepare stmt from 'truncate t for system_time timestamp between \'1-1-1\' and now(6)';
execute stmt;
drop prepare stmt;
end~~
create or replace table t (a int) with system versioning;
insert into t values (1);
update t set a=2;
select * from t for system_time all;
a
2
1
set @test = 'correct';
create trigger trg_before before delete on t for each row set @test = 'incorrect';
create trigger trg_after after delete on t for each row set @test = 'incorrect';
truncate t for system_time all;
select * from t for system_time all;
a
2
select @test from t;
@test
correct
drop trigger trg_before;
drop trigger trg_after;
update t set a=3;
update t set a=4;
truncate t for system_time as of timestamp now(6);
select * from t for system_time all;
a
4
2
3
truncate t for system_time timestamp between '1-1-1' and now(6);
select * from t for system_time all;
a
4
update t set a=5;
truncate t for system_time timestamp from '1-1-1' to now(6);
select * from t for system_time all;
a
5
update t set a=6;
call truncate_history_of_t();
select * from t for system_time all;
a
6
set @ts1 = now(6);
update t set a=7;
set @ts2 = now(6);
update t set a=8;
truncate t for system_time timestamp from '1-1-1' to @ts1;
select * from t for system_time all;
a
8
7
update t set a=9;
truncate t for system_time timestamp between '1-1-1' and @ts2;
select * from t for system_time all;
a
9
8
create or replace table t (a int) with system versioning engine=innodb;
insert into t values (1);
update t set a=2;
select * from t for system_time all;
a
2
1
truncate t for system_time all;
select * from t for system_time all;
a
2
update t set a=3;
update t set a=4;
truncate t for system_time as of timestamp now(6);
select * from t for system_time all;
a
4
2
3
truncate t for system_time timestamp between '1-1-1' and now(6);
select * from t for system_time all;
a
4
update t set a=5;
truncate t for system_time timestamp from '1-1-1' to now(6);
select * from t for system_time all;
a
5
update t set a=6;
call truncate_history_of_t();
select * from t for system_time all;
a
6
set @ts1 = now(6);
update t set a=7;
set @ts2 = now(6);
update t set a=8;
truncate t for system_time timestamp from '1-1-1' to @ts1;
select * from t for system_time all;
a
8
7
update t set a=9;
truncate t for system_time timestamp between '1-1-1' and @ts2;
select * from t for system_time all;
a
9
8
create or replace table t (a int) with system versioning;
insert into t values (1), (2);
update t set a=11 where a=1;
set @ts1=now(6);
update t set a=22 where a=2;
select * from t for system_time all;
a
11
22
1
2
select * from t for system_time before timestamp @ts1;
a
1
truncate t for system_time before timestamp @ts1;
select * from t for system_time all;
a
11
22
2
truncate t for system_time before timestamp now(6);
select * from t for system_time all;
a
11
22
create or replace table t (a int) with system versioning engine=innodb;
insert into t values (1), (2);
update t set a=11 where a=1;
set @ts1=now(6);
update t set a=22 where a=2;
select * from t for system_time all;
a
11
22
1
2
select * from t for system_time before timestamp @ts1;
a
1
insert into t values (33);
select max(sys_trx_start + 0) from t into @tx;
select * from t for system_time before transaction @tx;
a
1
2
truncate t for system_time before timestamp @ts1;
select * from t for system_time all;
a
11
22
2
33
truncate t for system_time before timestamp now(6);
select * from t for system_time all;
a
11
22
33
drop table t;
drop procedure truncate_history_of_t;
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