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From:Rick James Date:February 4 2013 9:07pm
Subject:RE: Mysqldump routines dump, problem with lock tables.
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Do not try to dump or reload information_schema.  It is derived meta information, not real
tables.

> -----Original Message-----
> From: Rafał Radecki [mailto:radecki.rafal@stripped]
> Sent: Monday, February 04, 2013 12:17 AM
> To: mysql@stripped
> Subject: Mysqldump routines dump, problem with lock tables.
> 
> Hi All.
> 
> I use:
> 
> # rpm -qa | grep -i percona-server-server
> Percona-Server-server-55-5.5.28-rel29.3.388.rhel6.x86_64
> 
> My system:
> 
> # uname -a;cat /etc/redhat-release
> Linux prbc01.mg.local 2.6.32-279.19.1.el6.centos.plus.x86_64 #1 SMP Wed
> Dec 19 06:20:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Red Hat
> Enterprise Linux Server release 6.3 (Santiago)
> 
> I have a backup script which at some point calls:
> 
> mysqldump --default-character-set=utf8 --routines --no-data --no-
> create-info --skip-triggers -S /mysql/database.sock -u backup -pxxx
> database
> 
> and I have error:
> 
> mysqldump: Got error: 1045: Access denied for user 'yyy'@'zzz' (using
> password: YES) when using LOCK TABLES
> 
> So I thinke that mysqldump locks the table (--add-locks) by default.
> 
> But for this user:
> 
> mysql> show grants for yyy@'zzz';
> +----------------------------------------------------------------------
> -----------------------------------------------------------------------
> ---+
> | Grants for backup@localhost
> 
>    |
> +----------------------------------------------------------------------
> -----------------------------------------------------------------------
> ---+
> | GRANT SELECT, RELOAD, LOCK TABLES, SHOW VIEW ON *.* TO 'yyy'@'zzz'
> IDENTIFIED BY PASSWORD ... |
>                                       |
> +----------------------------------------------------------------------
> -----------------------------------------------------------------------
> ---+
> 2 rows in set (0.00 sec)
> 
> So why is this error showing?
> When I add --single-transaction to mysqldump everything is ok. But I
> would like to have this table locked because:
> 
> mysql> SELECT ENGINE
>     -> FROM information_schema.TABLES
>     -> WHERE TABLE_SCHEMA = 'information_schema'
>     -> AND TABLE_NAME = 'routines';
> +--------+
> | ENGINE |
> +--------+
> | MyISAM |
> +--------+
> 
> so information_schema.tables is myisam.
> 
> So why do I get the error about LOCK TABLES?
> 
> Best regards,
> Rafal Radecki.
> 
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Thread
Mysqldump routines dump, problem with lock tables.Rafał Radecki4 Feb
  • RE: Mysqldump routines dump, problem with lock tables.Rick James4 Feb