> ------------------------------------------------------------
> revno: 3392.1.1
> revision-id: gshchepa@mysql.com-20100521184732-0jvpzinv0uwyvr2d
> parent: sven.sandberg@sun.com-20100520153801-yyhujm1qqa4eyfn0
> committer: Gleb Shchepa <gshchepa@mysql.com>
> branch nick: 53804-5.1
> timestamp: Fri 2010-05-21 22:47:32 +0400
> message:
>   Bug #53804: serious flaws in the alter database .. upgrade
>               data directory name command
>   
>   The check_db_name function has been modified to validate tails of
>   #mysql50#-prefixed database names for compliance with MySQL 5.0
>   database name encoding rules (the check_table_name function call
>   has been reused).