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MDEV-22247 History partition overflow leads to wrong SELECT result

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Historical query with AS OF point after the last history partition
must include last history partition because it can be overflown
(contain history rows out of right endpoint).

Move left point back to hist_part->id in that case.
This commit is contained in:
Aleksey Midenkov
2021-07-06 01:02:10 +03:00
parent e09e304b78
commit 07fade6d18
3 changed files with 53 additions and 0 deletions
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21
mysql-test/suite/versioning/r/partition.result
View File

@ -726,4 +726,25 @@ create or replace table t1 (a int) with system versioning;
alter table t1 partition by system_time (partition pn current);
ERROR HY000: Wrong partitions for `t1`: must have at least one HISTORY and exactly one last CURRENT
drop table t1;
#
# MDEV-22247 History partition overflow leads to wrong SELECT result
#
set timestamp= unix_timestamp('2000-01-01 00:00:00');
create or replace table t1 (x int) with system versioning
partition by system_time interval 1 hour
(partition p0 history, partition p1 history, partition pn current);
insert into t1 values (0);
update t1 set x= x + 1;
set timestamp= unix_timestamp('2000-01-01 02:00:01');
update t1 set x= x + 1;
select *, row_start, row_end from t1 for system_time as of '2000-01-01 02:00:00';
x row_start row_end
1 2000-01-01 00:00:00.000000 2000-01-01 02:00:01.000000
explain partitions select * from t1 for system_time as of '2000-01-01 02:00:00';
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p1,pn ALL NULL NULL NULL NULL # Using where
explain partitions select * from t1;
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 pn # NULL NULL NULL NULL # #
drop table t1;
# End of 10.3 tests

21
mysql-test/suite/versioning/t/partition.test
View File

@ -706,6 +706,27 @@ alter table t1 partition by system_time (partition pn current);
# Cleanup
drop table t1;
--echo #
--echo # MDEV-22247 History partition overflow leads to wrong SELECT result
--echo #
set timestamp= unix_timestamp('2000-01-01 00:00:00');
create or replace table t1 (x int) with system versioning
partition by system_time interval 1 hour
(partition p0 history, partition p1 history, partition pn current);
insert into t1 values (0);
update t1 set x= x + 1;
set timestamp= unix_timestamp('2000-01-01 02:00:01');
update t1 set x= x + 1;
select *, row_start, row_end from t1 for system_time as of '2000-01-01 02:00:00';
--replace_column 10 #
explain partitions select * from t1 for system_time as of '2000-01-01 02:00:00';
--replace_column 5 # 10 # 11 #
explain partitions select * from t1;
drop table t1;
--echo # End of 10.3 tests
--source suite/versioning/common_finish.inc