database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

versioning: use @@timestamp

Browse Source 
Don't use hidden system time in versioning,
but keep the system time logic in THD
to workaround low-res system clock and
replication not versioned to versioned.

This reverts MDEV-14788 (System versioning cannot
be based on local timestamps, as it is now).
Versioning is based on local timestamps again,
but timestamps are protected by MDEV-15923
(option to control who can set session @@timestamp).
This commit is contained in:
Sergei Golubchik
2018-05-02 21:53:12 +02:00
parent 4203f572ae
commit a4272bf154
9 changed files with 36 additions and 100 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
mysql-test/suite/versioning/t/partition_rotation.test Normal file
View File

@ -0,0 +1,40 @@
--source include/have_partition.inc
#
# partition rotation
#
set timestamp=unix_timestamp('2001-02-03 10:20:30');
create or replace table t1 (i int) with system versioning
partition by system_time interval 1 day
subpartition by key (i) subpartitions 2
(partition p1 history, partition pn current);
set timestamp=unix_timestamp('2001-02-03 10:20:40');
insert t1 values (1); delete from t1;
set timestamp=unix_timestamp('2001-02-04 10:20:50');
insert t1 values (2); delete from t1;
select subpartition_name,partition_description,table_rows from information_schema.partitions where table_schema='test' and table_name='t1';
set timestamp=unix_timestamp('2001-02-04 10:20:55');
alter table t1 add partition (partition p0 history, partition p2 history);
set timestamp=unix_timestamp('2001-02-04 10:30:00');
insert t1 values (4),(5);
set timestamp=unix_timestamp('2001-02-04 10:30:10');
update t1 set i=6 where i=5;
select subpartition_name,partition_description,table_rows from information_schema.partitions where table_schema='test' and table_name='t1';
--echo ## pruning check
set @ts=(select partition_description from information_schema.partitions
where table_schema='test' and table_name='t1' and partition_name='p0' limit 1);
--sorted_result
select * from t1;
explain partitions select * from t1;
--replace_column 10 #
explain partitions select * from t1 for system_time as of '2001-02-04 10:20:30';
set @ts=(select row_end from t1 for system_time all where i=1);
select * from t1 for system_time all where row_end = @ts;
--replace_column 5 # 10 # 11 #
explain partitions select * from t1 for system_time all where row_end = @ts;
drop table t1;