mysqlcheck.1

'\" t
.\"     Title: \fBmysqlcheck\fR
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: 03/25/2015
.\"    Manual: MySQL Database System
.\"    Source: MySQL 5.6
.\"  Language: English
.\"
.TH "\FBMYSQLCHECK\FR" "1" "03/25/2015" "MySQL 5\&.6" "MySQL Database System"
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.\" mysqlcheck
.\" maintenance: tables
.\" repair: tables
.\" tables: maintenance
.\" tables: repair
.SH "NAME"
mysqlcheck \- a table maintenance program
.SH "SYNOPSIS"
.HP \w'\fBmysqlcheck\ [\fR\fB\fIoptions\fR\fR\fB]\ [\fR\fB\fIdb_name\fR\fR\fB\ [\fR\fB\fItbl_name\fR\fR\fB\ \&.\&.\&.]]\fR\ 'u
\fBmysqlcheck [\fR\fB\fIoptions\fR\fR\fB] [\fR\fB\fIdb_name\fR\fR\fB [\fR\fB\fItbl_name\fR\fR\fB \&.\&.\&.]]\fR
.SH "DESCRIPTION"
.PP
The
\fBmysqlcheck\fR
client performs table maintenance: It checks, repairs, optimizes, or analyzes tables\&.
.PP
Each table is locked and therefore unavailable to other sessions while it is being processed, although for check operations, the table is locked with a
READ
lock only (see
Section\ \&13.3.5, \(lqLOCK TABLES and UNLOCK TABLES Syntax\(rq, for more information about
READ
and
WRITE
locks)\&. Table maintenance operations can be time\-consuming, particularly for large tables\&. If you use the
\fB\-\-databases\fR
or
\fB\-\-all\-databases\fR
option to process all tables in one or more databases, an invocation of
\fBmysqlcheck\fR
might take a long time\&. (This is also true for
\fBmysql_upgrade\fR
because that program invokes
\fBmysqlcheck\fR
to check all tables and repair them if necessary\&.)
.PP
\fBmysqlcheck\fR
is similar in function to
\fBmyisamchk\fR, but works differently\&. The main operational difference is that
\fBmysqlcheck\fR
must be used when the
\fBmysqld\fR
server is running, whereas
\fBmyisamchk\fR
should be used when it is not\&. The benefit of using
\fBmysqlcheck\fR
is that you do not have to stop the server to perform table maintenance\&.
.PP
\fBmysqlcheck\fR
uses the SQL statements
CHECK TABLE,
REPAIR TABLE,
ANALYZE TABLE, and
OPTIMIZE TABLE
in a convenient way for the user\&. It determines which statements to use for the operation you want to perform, and then sends the statements to the server to be executed\&. For details about which storage engines each statement works with, see the descriptions for those statements in
Section\ \&13.7.2, \(lqTable Maintenance Statements\(rq\&.
.PP
The
MyISAM
storage engine supports all four maintenance operations, so
\fBmysqlcheck\fR
can be used to perform any of them on
MyISAM
tables\&. Other storage engines do not necessarily support all operations\&. In such cases, an error message is displayed\&. For example, if
test\&.t
is a
MEMORY
table, an attempt to check it produces this result:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqlcheck test t\fR
test\&.t
note     : The storage engine for the table doesn\*(Aqt support check
.fi
.if n \{\
.RE
.\}
.PP
If
\fBmysqlcheck\fR
is unable to repair a table, see
Section\ \&2.11.4, \(lqRebuilding or Repairing Tables or Indexes\(rq
for manual table repair strategies\&. This will be the case, for example, for
InnoDB
tables, which can be checked with
CHECK TABLE, but not repaired with
REPAIR TABLE\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBCaution\fR
.ps -1
.br
.PP
It is best to make a backup of a table before performing a table repair operation; under some circumstances the operation might cause data loss\&. Possible causes include but are not limited to file system errors\&.
.sp .5v
.RE
.PP
There are three general ways to invoke
\fBmysqlcheck\fR:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBmysqlcheck [\fR\fB\fIoptions\fR\fR\fB] \fR\fB\fIdb_name\fR\fR\fB [\fR\fB\fItbl_name\fR\fR\fB \&.\&.\&.]\fR
shell> \fBmysqlcheck [\fR\fB\fIoptions\fR\fR\fB] \-\-databases \fR\fB\fIdb_name\fR\fR\fB \&.\&.\&.\fR
shell> \fBmysqlcheck [\fR\fB\fIoptions\fR\fR\fB] \-\-all\-databases\fR
.fi
.if n \{\
.RE
.\}
.PP
If you do not name any tables following
\fIdb_name\fR
or if you use the
\fB\-\-databases\fR
or
\fB\-\-all\-databases\fR
option, entire databases are checked\&.
.PP
\fBmysqlcheck\fR
has a special feature compared to other client programs\&. The default behavior of checking tables (\fB\-\-check\fR) can be changed by renaming the binary\&. If you want to have a tool that repairs tables by default, you should just make a copy of
\fBmysqlcheck\fR
named
\fBmysqlrepair\fR, or make a symbolic link to
\fBmysqlcheck\fR
named
\fBmysqlrepair\fR\&. If you invoke
\fBmysqlrepair\fR, it repairs tables\&.
.PP
The names shown in the following table can be used to change
\fBmysqlcheck\fR
default behavior\&.
.TS
allbox tab(:);
lB lB.
T{
Command
T}:T{
Meaning
T}
.T&
l l
l l
l l.
T{
\fBmysqlrepair\fR
T}:T{
The default option is \fB\-\-repair\fR
T}
T{
\fBmysqlanalyze\fR
T}:T{
The default option is \fB\-\-analyze\fR
T}
T{
\fBmysqloptimize\fR
T}:T{
The default option is \fB\-\-optimize\fR
T}
.TE
.sp 1
.PP
\fBmysqlcheck\fR
supports the following options, which can be specified on the command line or in the
[mysqlcheck]
and
[client]
groups of an option file\&. For information about option files used by MySQL programs, see
Section\ \&4.2.6, \(lqUsing Option Files\(rq\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: help option
.\" help option: mysqlcheck
\fB\-\-help\fR,
\fB\-?\fR
.sp
Display a help message and exit\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: all-databases option
.\" all-databases option: mysqlcheck
\fB\-\-all\-databases\fR,
\fB\-A\fR
.sp
Check all tables in all databases\&. This is the same as using the
\fB\-\-databases\fR
option and naming all the databases on the command line, except that the
INFORMATION_SCHEMA
and
performace_schema
databases are not dumped\&. They can be dumped by explicitly naming them with the
\fB\-\-databases\fR
option\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: all-in-1 option
.\" all-in-1 option: mysqlcheck
\fB\-\-all\-in\-1\fR,
\fB\-1\fR
.sp
Instead of issuing a statement for each table, execute a single statement for each database that names all the tables from that database to be processed\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: analyze option
.\" analyze option: mysqlcheck
\fB\-\-analyze\fR,
\fB\-a\fR
.sp
Analyze the tables\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: auto-repair option
.\" auto-repair option: mysqlcheck
\fB\-\-auto\-repair\fR
.sp
If a checked table is corrupted, automatically fix it\&. Any necessary repairs are done after all tables have been checked\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: bind-address option
.\" bind-address option: mysqlcheck
\fB\-\-bind\-address=\fR\fB\fIip_address\fR\fR
.sp
On a computer having multiple network interfaces, use this option to select which interface to use for connecting to the MySQL server\&.
.sp
This option is supported beginning with MySQL 5\&.6\&.1\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: character-sets-dir option
.\" character-sets-dir option: mysqlcheck
\fB\-\-character\-sets\-dir=\fR\fB\fIpath\fR\fR
.sp
The directory where character sets are installed\&. See
Section\ \&10.5, \(lqCharacter Set Configuration\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: check option
.\" check option: mysqlcheck
\fB\-\-check\fR,
\fB\-c\fR
.sp
Check the tables for errors\&. This is the default operation\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: check-only-changed option
.\" check-only-changed option: mysqlcheck
\fB\-\-check\-only\-changed\fR,
\fB\-C\fR
.sp
Check only tables that have changed since the last check or that have not been closed properly\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: check-upgrade option
.\" check-upgrade option: mysqlcheck
\fB\-\-check\-upgrade\fR,
\fB\-g\fR
.sp
Invoke
CHECK TABLE
with the
FOR UPGRADE
option to check tables for incompatibilities with the current version of the server\&. This option automatically enables the
\fB\-\-fix\-db\-names\fR
and
\fB\-\-fix\-table\-names\fR
options\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: compress option
.\" compress option: mysqlcheck
\fB\-\-compress\fR
.sp
Compress all information sent between the client and the server if both support compression\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: databases option
.\" databases option: mysqlcheck
\fB\-\-databases\fR,
\fB\-B\fR
.sp
Process all tables in the named databases\&. Normally,
\fBmysqlcheck\fR
treats the first name argument on the command line as a database name and following names as table names\&. With this option, it treats all name arguments as database names\&.
.sp
This option may be used to dump the
INFORMATION_SCHEMA
and
performace_schema
databases, which normally are not dumped even with the
\fB\-\-all\-databases\fR
option\&. (Also use the
\fB\-\-skip\-lock\-tables\fR
option\&.)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: debug option
.\" debug option: mysqlcheck
\fB\-\-debug[=\fR\fB\fIdebug_options\fR\fR\fB]\fR,
\fB\-# [\fR\fB\fIdebug_options\fR\fR\fB]\fR
.sp
Write a debugging log\&. A typical
\fIdebug_options\fR
string is
d:t:o,\fIfile_name\fR\&. The default is
d:t:o\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: debug-check option
.\" debug-check option: mysqlcheck
\fB\-\-debug\-check\fR
.sp
Print some debugging information when the program exits\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: debug-info option
.\" debug-info option: mysqlcheck
\fB\-\-debug\-info\fR
.sp
Print debugging information and memory and CPU usage statistics when the program exits\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: default-character-set option
.\" default-character-set option: mysqlcheck
\fB\-\-default\-character\-set=\fR\fB\fIcharset_name\fR\fR
.sp
Use
\fIcharset_name\fR
as the default character set\&. See
Section\ \&10.5, \(lqCharacter Set Configuration\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: defaults-extra-file option
.\" defaults-extra-file option: mysqlcheck
\fB\-\-defaults\-extra\-file=\fR\fB\fIfile_name\fR\fR
.sp
Read this option file after the global option file but (on Unix) before the user option file\&. If the file does not exist or is otherwise inaccessible, an error occurs\&.
\fIfile_name\fR
is interpreted relative to the current directory if given as a relative path name rather than a full path name\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: defaults-file option
.\" defaults-file option: mysqlcheck
\fB\-\-defaults\-file=\fR\fB\fIfile_name\fR\fR
.sp
Use only the given option file\&. If the file does not exist or is otherwise inaccessible, an error occurs\&.
\fIfile_name\fR
is interpreted relative to the current directory if given as a relative path name rather than a full path name\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: defaults-group-suffix option
.\" defaults-group-suffix option: mysqlcheck
\fB\-\-defaults\-group\-suffix=\fR\fB\fIstr\fR\fR
.sp
Read not only the usual option groups, but also groups with the usual names and a suffix of
\fIstr\fR\&. For example,
\fBmysqlcheck\fR
normally reads the
[client]
and
[mysqlcheck]
groups\&. If the
\fB\-\-defaults\-group\-suffix=_other\fR
option is given,
\fBmysqlcheck\fR
also reads the
[client_other]
and
[mysqlcheck_other]
groups\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: extended option
.\" extended option: mysqlcheck
\fB\-\-extended\fR,
\fB\-e\fR
.sp
If you are using this option to check tables, it ensures that they are 100% consistent but takes a long time\&.
.sp
If you are using this option to repair tables, it runs an extended repair that may not only take a long time to execute, but may produce a lot of garbage rows also!
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: default-auth option
.\" default-auth option: mysqlcheck
\fB\-\-default\-auth=\fR\fB\fIplugin\fR\fR
.sp
A hint about the client\-side authentication plugin to use\&. See
Section\ \&6.3.7, \(lqPluggable Authentication\(rq\&.
.sp
This option was added in MySQL 5\&.6\&.2\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: fast option
.\" fast option: mysqlcheck
\fB\-\-fast\fR,
\fB\-F\fR
.sp
Check only tables that have not been closed properly\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: fix-db-names option
.\" fix-db-names option: mysqlcheck
\fB\-\-fix\-db\-names\fR
.sp
Convert database names to 5\&.1 format\&. Only database names that contain special characters are affected\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: fix-table-names option
.\" fix-table-names option: mysqlcheck
\fB\-\-fix\-table\-names\fR
.sp
Convert table names to 5\&.1 format\&. Only table names that contain special characters are affected\&. This option also applies to views\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: force option
.\" force option: mysqlcheck
\fB\-\-force\fR,
\fB\-f\fR
.sp
Continue even if an SQL error occurs\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: host option
.\" host option: mysqlcheck
\fB\-\-host=\fR\fB\fIhost_name\fR\fR,
\fB\-h \fR\fB\fIhost_name\fR\fR
.sp
Connect to the MySQL server on the given host\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: login-path option
.\" login-path option: mysqlcheck
\fB\-\-login\-path=\fR\fB\fIname\fR\fR
.sp
Read options from the named login path in the
\&.mylogin\&.cnf
login file\&. A
\(lqlogin path\(rq
is an option group that permits only a limited set of options:
\fBhost\fR,
\fBuser\fR, and
\fBpassword\fR\&. Think of a login path as a set of values that indicate the server host and the credentials for authenticating with the server\&. To create the login path file, use the
\fBmysql_config_editor\fR
utility\&. See
\fBmysql_config_editor\fR(1)\&. This option was added in MySQL 5\&.6\&.6\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: medium-check option
.\" medium-check option: mysqlcheck
\fB\-\-medium\-check\fR,
\fB\-m\fR
.sp
Do a check that is faster than an
\fB\-\-extended\fR
operation\&. This finds only 99\&.99% of all errors, which should be good enough in most cases\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: no-defaults option
.\" no-defaults option: mysqlcheck
\fB\-\-no\-defaults\fR
.sp
Do not read any option files\&. If program startup fails due to reading unknown options from an option file,
\fB\-\-no\-defaults\fR
can be used to prevent them from being read\&.
.sp
The exception is that the
\&.mylogin\&.cnf
file, if it exists, is read in all cases\&. This permits passwords to be specified in a safer way than on the command line even when
\fB\-\-no\-defaults\fR
is used\&. (\&.mylogin\&.cnf
is created by the
\fBmysql_config_editor\fR
utility\&. See
\fBmysql_config_editor\fR(1)\&.)
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: optimize option
.\" optimize option: mysqlcheck
\fB\-\-optimize\fR,
\fB\-o\fR
.sp
Optimize the tables\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: password option
.\" password option: mysqlcheck
\fB\-\-password[=\fR\fB\fIpassword\fR\fR\fB]\fR,
\fB\-p[\fR\fB\fIpassword\fR\fR\fB]\fR
.sp
The password to use when connecting to the server\&. If you use the short option form (\fB\-p\fR), you
\fIcannot\fR
have a space between the option and the password\&. If you omit the
\fIpassword\fR
value following the
\fB\-\-password\fR
or
\fB\-p\fR
option on the command line,
\fBmysqlcheck\fR
prompts for one\&.
.sp
Specifying a password on the command line should be considered insecure\&. See
Section\ \&6.1.2.1, \(lqEnd-User Guidelines for Password Security\(rq\&. You can use an option file to avoid giving the password on the command line\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: pipe option
.\" pipe option: mysql
\fB\-\-pipe\fR,
\fB\-W\fR
.sp
On Windows, connect to the server using a named pipe\&. This option applies only if the server supports named\-pipe connections\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: plugin-dir option
.\" plugin-dir option: mysqlcheck
\fB\-\-plugin\-dir=\fR\fB\fIpath\fR\fR
.sp
The directory in which to look for plugins\&. It may be necessary to specify this option if the
\fB\-\-default\-auth\fR
option is used to specify an authentication plugin but
\fBmysqlcheck\fR
does not find it\&. See
Section\ \&6.3.7, \(lqPluggable Authentication\(rq\&.
.sp
This option was added in MySQL 5\&.6\&.2\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: port option
.\" port option: mysqlcheck
\fB\-\-port=\fR\fB\fIport_num\fR\fR,
\fB\-P \fR\fB\fIport_num\fR\fR
.sp
The TCP/IP port number to use for the connection\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: print-defaults option
.\" print-defaults option: mysqlcheck
\fB\-\-print\-defaults\fR
.sp
Print the program name and all options that it gets from option files\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: protocol option
.\" protocol option: mysqlcheck
\fB\-\-protocol={TCP|SOCKET|PIPE|MEMORY}\fR
.sp
The connection protocol to use for connecting to the server\&. It is useful when the other connection parameters normally would cause a protocol to be used other than the one you want\&. For details on the permissible values, see
Section\ \&4.2.2, \(lqConnecting to the MySQL Server\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: quick option
.\" quick option: mysqlcheck
\fB\-\-quick\fR,
\fB\-q\fR
.sp
If you are using this option to check tables, it prevents the check from scanning the rows to check for incorrect links\&. This is the fastest check method\&.
.sp
If you are using this option to repair tables, it tries to repair only the index tree\&. This is the fastest repair method\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: repair option
.\" repair option: mysqlcheck
\fB\-\-repair\fR,
\fB\-r\fR
.sp
Perform a repair that can fix almost anything except unique keys that are not unique\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: secure-auth option
.\" secure-auth option: mysqlcheck
\fB\-\-secure\-auth\fR
.sp
Do not send passwords to the server in old (pre\-4\&.1) format\&. This prevents connections except for servers that use the newer password format\&. This option is enabled by default; use
\fB\-\-skip\-secure\-auth\fR
to disable it\&. This option was added in MySQL 5\&.6\&.17\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
Passwords that use the pre\-4\&.1 hashing method are less secure than passwords that use the native password hashing method and should be avoided\&. Pre\-4\&.1 passwords are deprecated and support for them will be removed in a future MySQL release\&. For account upgrade instructions, see
Section\ \&6.3.8.3, \(lqMigrating Away from Pre-4.1 Password Hashing and the mysql_old_password Plugin\(rq\&.
.sp .5v
.RE
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: shared-memory-base-name option
.\" shared-memory-base-name option: mysqlcheck
\fB\-\-shared\-memory\-base\-name=\fR\fB\fIname\fR\fR
.sp
On Windows, the shared\-memory name to use, for connections made using shared memory to a local server\&. The default value is
MYSQL\&. The shared\-memory name is case sensitive\&.
.sp
The server must be started with the
\fB\-\-shared\-memory\fR
option to enable shared\-memory connections\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: silent option
.\" silent option: mysqlcheck
\fB\-\-silent\fR,
\fB\-s\fR
.sp
Silent mode\&. Print only error messages\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: skip-database option
.\" skip-database option: mysqlcheck
\fB\-\-skip\-database=\fR\fB\fIdb_name\fR\fR
.sp
Do not include the named database (case sensitive) in the operations performed by
\fBmysqlcheck\fR\&. This option was added in MySQL 5\&.6\&.11\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: socket option
.\" socket option: mysqlcheck
\fB\-\-socket=\fR\fB\fIpath\fR\fR,
\fB\-S \fR\fB\fIpath\fR\fR
.sp
For connections to
localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: SSL options
.\" SSL options: mysqlcheck
\fB\-\-ssl*\fR
.sp
Options that begin with
\fB\-\-ssl\fR
specify whether to connect to the server using SSL and indicate where to find SSL keys and certificates\&. See
Section\ \&6.3.10.4, \(lqSSL Command Options\(rq\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: tables option
.\" tables option: mysqlcheck
\fB\-\-tables\fR
.sp
Override the
\fB\-\-databases\fR
or
\fB\-B\fR
option\&. All name arguments following the option are regarded as table names\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: use-frm option
.\" use-frm option: mysqlcheck
\fB\-\-use\-frm\fR
.sp
For repair operations on
MyISAM
tables, get the table structure from the
\&.frm
file so that the table can be repaired even if the
\&.MYI
header is corrupted\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: user option
.\" user option: mysqlcheck
\fB\-\-user=\fR\fB\fIuser_name\fR\fR,
\fB\-u \fR\fB\fIuser_name\fR\fR
.sp
The MySQL user name to use when connecting to the server\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: verbose option
.\" verbose option: mysqlcheck
\fB\-\-verbose\fR,
\fB\-v\fR
.sp
Verbose mode\&. Print information about the various stages of program operation\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: version option
.\" version option: mysqlcheck
\fB\-\-version\fR,
\fB\-V\fR
.sp
Display version information and exit\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
.\" mysqlcheck: write-binlog option
.\" write-binlog option: mysqlcheck
\fB\-\-write\-binlog\fR
.sp
This option is enabled by default, so that
ANALYZE TABLE,
OPTIMIZE TABLE, and
REPAIR TABLE
statements generated by
\fBmysqlcheck\fR
are written to the binary log\&. Use
\fB\-\-skip\-write\-binlog\fR
to cause
NO_WRITE_TO_BINLOG
to be added to the statements so that they are not logged\&. Use the
\fB\-\-skip\-write\-binlog\fR
when these statements should not be sent to replication slaves or run when using the binary logs for recovery from backup\&.
.RE
.SH "COPYRIGHT"
.br
.PP
Copyright \(co 1997, 2015, Oracle and/or its affiliates. All rights reserved.
.PP
This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.
.PP
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
.PP
You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.
.sp
.SH "SEE ALSO"
For more information, please refer to the MySQL Reference Manual,
which may already be installed locally and which is also available
online at http://dev.mysql.com/doc/.
.SH AUTHOR
Oracle Corporation (http://dev.mysql.com/).