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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/t/partition.test
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@ -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