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MDEV-31043 ER_KEY_NOT_FOUND upon concurrent ALTER and transaction

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Non-transactional engines changes are visible immediately the row operation
succeeds, so we should apply the changes to the online buffer immediately
after the statement ends.
This commit is contained in:
Nikita Malyavin
2023-04-14 04:34:21 +03:00
committed by Sergei Golubchik
parent c76072db93
commit 0695f7dd7b
3 changed files with 109 additions and 9 deletions
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46
mysql-test/main/alter_table_online_debug.result
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@ -1251,8 +1251,54 @@ a
2
1
drop table t;
#
# MDEV-31043 ER_KEY_NOT_FOUND upon concurrent ALTER and transaction
#
create table t (a int, b int) engine=myisam;
insert into t values (1,10),(2,20);
set debug_sync= 'alter_table_online_before_lock signal burnit wait_for goforit';
alter table t add c int, algorithm=copy, lock=none;
connection con1;
set debug_sync= 'now wait_for burnit';
update t set b = 100;
start transaction;
update t set b = 200;
connection con2;
delete from t order by a limit 1;
delete from t order by a limit 1;
select * from t;
a b
connection con1;
commit;
set debug_sync= 'now signal goforit';
connection default;
select * from t;
a b c
drop table t;
create table t (a int, b int) engine=aria;
insert into t values (1,10),(2,20);
set debug_sync= 'alter_table_online_before_lock signal burnit wait_for goforit';
alter table t add c int, algorithm=copy, lock=none;
connection con1;
set debug_sync= 'now wait_for burnit';
update t set b = 100;
start transaction;
update t set b = 200;
connection con2;
delete from t order by a limit 1;
delete from t order by a limit 1;
select * from t;
a b
connection con1;
commit;
set debug_sync= 'now signal goforit';
connection default;
select * from t;
a b c
drop table t;
set debug_sync= reset;
disconnect con1;
disconnect con2;
#
# End of 11.2 tests
#