mirror of
https://github.com/MariaDB/server.git
synced 2025-05-13 01:01:44 +03:00
153 lines
4.1 KiB
Plaintext
153 lines
4.1 KiB
Plaintext
set @@session.time_zone='+00:00';
|
|
select ifnull(max(trx_id), 0) into @start_trx_id from information_schema.innodb_vtq;
|
|
create procedure if not exists verify_vtq()
|
|
begin
|
|
set @i= 0;
|
|
select
|
|
@i:= @i + 1 as No,
|
|
trx_id > 0 as A,
|
|
commit_id >= trx_id as B,
|
|
begin_ts > '1-1-1 0:0:0' as C,
|
|
commit_ts > begin_ts as D
|
|
from information_schema.innodb_vtq
|
|
where trx_id > @start_trx_id;
|
|
select ifnull(max(trx_id), 0)
|
|
into @start_trx_id
|
|
from information_schema.innodb_vtq;
|
|
end~~
|
|
create function if not exists default_engine()
|
|
returns varchar(255)
|
|
deterministic
|
|
begin
|
|
declare e varchar(255);
|
|
select lower(engine) from information_schema.engines where support='DEFAULT' into e;
|
|
return e;
|
|
end~~
|
|
create function if not exists sys_datatype()
|
|
returns varchar(255)
|
|
deterministic
|
|
begin
|
|
if default_engine() = 'innodb' then
|
|
return 'bigint unsigned';
|
|
elseif default_engine() = 'myisam' then
|
|
return 'timestamp(6)';
|
|
end if;
|
|
return NULL;
|
|
end~~
|
|
create function if not exists sys_commit_ts(sys_field varchar(255))
|
|
returns varchar(255)
|
|
deterministic
|
|
begin
|
|
if default_engine() = 'innodb' then
|
|
return concat('vtq_commit_ts(', sys_field, ')');
|
|
elseif default_engine() = 'myisam' then
|
|
return sys_field;
|
|
end if;
|
|
return NULL;
|
|
end~~
|
|
create procedure if not exists innodb_verify_vtq(recs int)
|
|
begin
|
|
declare i int default 1;
|
|
if default_engine() = 'innodb' then
|
|
call verify_vtq;
|
|
elseif default_engine() = 'myisam' then
|
|
create temporary table tmp (No int, A bool, B bool, C bool, D bool);
|
|
while i <= recs do
|
|
insert into tmp values (i, 1, 1, 1, 1);
|
|
set i= i + 1;
|
|
end while;
|
|
select * from tmp;
|
|
drop table tmp;
|
|
end if;
|
|
end~~
|
|
create table t1(
|
|
id int auto_increment primary key)
|
|
with system versioning
|
|
engine innodb;
|
|
set transaction isolation level read uncommitted;
|
|
insert into t1 values ();
|
|
select iso_level = 'RU' from information_schema.innodb_vtq limit 1;
|
|
iso_level = 'RU'
|
|
1
|
|
set transaction isolation level read committed;
|
|
insert into t1 values ();
|
|
select iso_level = 'RC' from information_schema.innodb_vtq limit 1;
|
|
iso_level = 'RC'
|
|
1
|
|
set transaction isolation level serializable;
|
|
insert into t1 values ();
|
|
select iso_level = 'S' from information_schema.innodb_vtq limit 1;
|
|
iso_level = 'S'
|
|
1
|
|
set transaction isolation level repeatable read;
|
|
insert into t1 values ();
|
|
select iso_level = 'RR' from information_schema.innodb_vtq limit 1;
|
|
iso_level = 'RR'
|
|
1
|
|
set @ts0= now(6);
|
|
insert into t1 values ();
|
|
select sys_trx_start from t1 where id = last_insert_id() into @tx0;
|
|
select trx_id = @tx0 from information_schema.innodb_vtq limit 1;
|
|
trx_id = @tx0
|
|
1
|
|
set @ts1= now(6);
|
|
insert into t1 values ();
|
|
select sys_trx_start from t1 where id = last_insert_id() into @tx1;
|
|
select trx_id = @tx1 from information_schema.innodb_vtq limit 1;
|
|
trx_id = @tx1
|
|
1
|
|
set @ts2= now(6);
|
|
insert into t1 values ();
|
|
select sys_trx_start from t1 where id = last_insert_id() into @tx2;
|
|
select trx_id = @tx2 from information_schema.innodb_vtq limit 1;
|
|
trx_id = @tx2
|
|
1
|
|
set @ts3= now(6);
|
|
select
|
|
vtq_trx_id(@ts0) < @tx0 as A,
|
|
vtq_trx_id(@ts0, true) = @tx0 as B,
|
|
vtq_trx_id(@ts1) = @tx0 as C,
|
|
vtq_trx_id(@ts1, true) = @tx1 as D,
|
|
vtq_trx_id(@ts2) = @tx1 as E,
|
|
vtq_trx_id(@ts2, true) = @tx2 as F,
|
|
vtq_trx_id(@ts3) = @tx2 as G,
|
|
vtq_trx_id(@ts3, true) is null as H;
|
|
A B C D E F G H
|
|
1 1 1 1 1 1 1 1
|
|
select
|
|
vtq_commit_id(@ts0) < @tx0 as A,
|
|
vtq_commit_id(@ts0, true) = vtq_commit_id(null, @tx0) as B,
|
|
vtq_commit_id(@ts1) = vtq_commit_id(null, @tx0) as C,
|
|
vtq_commit_id(@ts1, true) = vtq_commit_id(null, @tx1) as D,
|
|
vtq_commit_id(@ts2) = vtq_commit_id(null, @tx1) as E,
|
|
vtq_commit_id(@ts2, true) = vtq_commit_id(null, @tx2) as F,
|
|
vtq_commit_id(@ts3) = vtq_commit_id(null, @tx2) as G,
|
|
vtq_commit_id(@ts3, true) is null as H;
|
|
A B C D E F G H
|
|
1 1 1 1 1 1 1 1
|
|
select
|
|
vtq_trx_sees(@tx1, @tx0) as A,
|
|
not vtq_trx_sees(@tx0, @tx1) as B,
|
|
vtq_trx_sees_eq(@tx1, @tx1) as C,
|
|
not vtq_trx_sees(@tx1, @tx1) as D,
|
|
vtq_trx_sees(@tx2, 0) as E,
|
|
vtq_trx_sees(0, @tx2) is null as F,
|
|
vtq_trx_sees(-1, @tx2) as H;
|
|
A B C D E F H
|
|
1 1 1 1 1 1 1
|
|
drop table t1;
|
|
call verify_vtq;
|
|
No A B C D
|
|
1 1 1 1 1
|
|
2 1 1 1 1
|
|
3 1 1 1 1
|
|
4 1 1 1 1
|
|
5 1 1 1 1
|
|
6 1 1 1 1
|
|
7 1 1 1 1
|
|
drop procedure verify_vtq;
|
|
drop procedure innodb_verify_vtq;
|
|
drop function default_engine;
|
|
drop function sys_commit_ts;
|
|
drop function sys_datatype;
|