BTW: that crazy behavior also breaks silently replication Version: '10.0.17-MariaDB' socket: '/var/lib/mysql/mysql_replication.sock' port: 3307 thelounge 150319 18:34:05 [Note] Slave SQL thread initialized, starting replication in log 'bin.000325' at position 320, relay log './mysql-relay-bin.000709' position: 601 150319 18:34:05 [ERROR] Slave SQL: Error 'Can't create table `dbmail`.`#sql-7ba3_3` (errno: 140 "Wrong create options")' on query. Default database: 'dbmail'. Query: 'ALTER TABLE `systemevents` ENGINE = InnoDB', Gtid 0-1-147094, Internal MariaDB error code: 1005 150319 18:34:05 [Warning] Slave: Table storage engine 'InnoDB' does not support the create option 'TRANSACTIONAL=1' Error_code: 1478 150319 18:34:05 [Warning] Slave: InnoDB: invalid ROW_FORMAT specifier. Error_code: 1478 150319 18:34:05 [Warning] Slave: Can't create table `dbmail`.`#sql-7ba3_3` (errno: 140 "Wrong create options") Error_code: 1005 150319 18:34:05 [Warning] Slave: Got error 140 "Wrong create options" from storage engine InnoDB Error_code: 1030 150319 18:34:05 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'bin.000325' position 320 150319 18:34:05 [Note] InnoDB: 128 rollback segment(s) are active Am 02.03.2015 um 15:54 schrieb Reindl Harald:
Am 02.03.2015 um 15:22 schrieb Jean Weisbuch:
Just as a side note, its possible to remove the TRANSACTIONAL=x option by adding TRANSACTIONAL=default on the ALTER statement.
wouldn't a "ALTER TABLE `systemevents` ENGINE=InnoDB DEFAULTS;" be more logical which should be default in case of strict mode or at least give a clear message about it?
A similar issue arises if for example ROW_FORMAT=PAGE is used on the ARIA table as it doesnt exists on InnoDB, it will issue a warning "InnoDB: assuming ROW_FORMAT=COMPACT." but the resulting table will show ROW_FORMAT=PAGE even if it uses the COMPACT row format...
and that is really confusing and may lead to weird problems
it should not assume but set it to ROW_FORMAT=COMPACT and only isse errors if that for whatever reasons fails
what we now have is that you can't trust the output of params at all
Le 02/03/2015 15:18, Reindl Harald a écrit :
Am 02.03.2015 um 15:03 schrieb Ian Gilfillan:
On 02/03/2015 15:37, Reindl Harald wrote:
Am 02.03.2015 um 14:26 schrieb Ian Gilfillan:
This is probably because strict mode is set. If unset, it should return a warning, not an error. From MariaDB 10.1.2, you can use: SET STATEMENT sql_mode='' FOR ALTER TABLE `systemevents` ENGINE = InnoDB; which will unset strict mode just for that query, otherwise for older versions just set it off and on again for the session to alter.
indeed *but* why does "TRANSACTIONAL=0" don't go away after convert to InnoDB?
Why is so that the change is reversible
that makes no sense, keep options which are invalid for the target engine is completly wrong and leads to the above problems that you can't convert tables only in the dirty default mode
if you now convert to InnoDB "TRANSACTIONAL=0" makes no sense if you later decide to convert back to Aria you need to set that flag in a follow-up step - but keep invalid and dirty options is just asking for troubles until "alter table" has no way to delete them
Obviously this may not be desirable in many cases. See https://mariadb.atlassian.net/browse/MDEV-5867 for a similar discussion and a fix that was applied in 10.0.13
it is not desirebale in *any* sane case