> ------------------------------------------------------------
> revno: 3452.17.1
> revision-id: mattias.jonsson@oracle.com-20101005125751-ds92svhhb13ds8ri
> parent: sergey.glukhov@sun.com-20101004085126-ia6veky4w6j87i43
> committer: Mattias Jonsson <mattias.jonsson@oracle.com>
> branch nick: b55091-51-security
> timestamp: Tue 2010-10-05 14:57:51 +0200
> message:
>   Bug#55091: Server crashes on ADD PARTITION after a failed attempt
>   
>   In case of failure in ALTER ... PARTITION under LOCK TABLE
>   the server could crash, due to it had modified the locked
>   table object, which was not reverted in case of failure,
>   resulting in a bad table definition used after the failed
>   command.
>   
>   Solved by always closing the LOCKED TABLE, even in case
>   of error.
>   
>   Note: this is a 5.1-only fix, bug#56172 fixed it in 5.5+