# mysqlanalyze(1) - man - phpMan
[MYSQLCHECK(1)](https://www.chedong.com/phpMan.php/man/MYSQLCHECK/1/markdown) MySQL Database System [MYSQLCHECK(1)](https://www.chedong.com/phpMan.php/man/MYSQLCHECK/1/markdown)
## NAME
mysqlcheck - a table maintenance program
## SYNOPSIS
**mysqlcheck** **[**_options_**]** **[**_db_name_ **[**_tbl_name_ **...]]**
## DESCRIPTION
The **mysqlcheck** client performs table maintenance: It checks, repairs, optimizes, or analyzes
tables.
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 15.3.6,
“LOCK TABLES and UNLOCK TABLES Statements”, for more information about READ and WRITE locks).
Table maintenance operations can be time-consuming, particularly for large tables. If you use
the **--databases** or **--all-databases** option to process all tables in one or more databases, an
invocation of **mysqlcheck** might take a long time. (This is also true for the MySQL upgrade
procedure if it determines that table checking is needed because it processes tables the same
way.)
**mysqlcheck** must be used when the **mysqld** server is running, which means that you do not have
to stop the server to perform table maintenance.
**mysqlcheck** 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 15.7.3, “Table Maintenance Statements”.
All storage engines do not necessarily support all four maintenance operations. In such
cases, an error message is displayed. For example, if test.t is an MEMORY table, an attempt
to check it produces this result:
$> **mysqlcheck** **test** **t**
test.t
note : The storage engine for the table doesn't support check
If **mysqlcheck** is unable to repair a table, see Section 3.14, “Rebuilding or Repairing Tables
or Indexes” for manual table repair strategies. This is the case, for example, for InnoDB
tables, which can be checked with CHECK TABLE, but not repaired with REPAIR TABLE.
**Caution**
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.
There are three general ways to invoke **mysqlcheck**:
mysqlcheck [_options_] _db_name_ [_tbl_name_ ...]
mysqlcheck [_options_] --databases _db_name_ ...
mysqlcheck [_options_] --all-databases
If you do not name any tables following _db_name_ or if you use the **--databases** or
**--all-databases** option, entire databases are checked.
**mysqlcheck** has a special feature compared to other client programs. The default behavior of
checking tables (**--check**) 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 **mysqlcheck** named **mysqlrepair**,
or make a symbolic link to **mysqlcheck** named **mysqlrepair**. If you invoke **mysqlrepair**, it
repairs tables.
The names shown in the following table can be used to change **mysqlcheck** default behavior.
┌──────────────┬──────────────────────────────────┐
│**Command** │ **Meaning** │
├──────────────┼──────────────────────────────────┤
│**mysqlrepair** │ The default option is **--repair** │
├──────────────┼──────────────────────────────────┤
│**mysqlanalyze** │ The default option is **--analyze** │
├──────────────┼──────────────────────────────────┤
│**mysqloptimize** │ The default option is **--optimize** │
└──────────────┴──────────────────────────────────┘
**mysqlcheck** 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 6.2.2.2, “Using Option Files”.
• **--help**, **-?**
┌────────────────────┬────────┐
│**Command-Line** **Format** │ --help │
└────────────────────┴────────┘
Display a help message and exit.
• **--all-databases**, **-A**
┌────────────────────┬─────────────────┐
│**Command-Line** **Format** │ --all-databases │
└────────────────────┴─────────────────┘
Check all tables in all databases. This is the same as using the **--databases** option and
naming all the databases on the command line, except that the INFORMATION_SCHEMA and
performance_schema databases are not checked. They can be checked by explicitly naming
them with the **--databases** option.
• **--all-in-1**, **-1**
┌────────────────────┬────────────┐
│**Command-Line** **Format** │ --all-in-1 │
└────────────────────┴────────────┘
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.
• **--analyze**, **-a**
┌────────────────────┬───────────┐
│**Command-Line** **Format** │ --analyze │
└────────────────────┴───────────┘
Analyze the tables.
• **--auto-repair**
┌────────────────────┬───────────────┐
│**Command-Line** **Format** │ --auto-repair │
└────────────────────┴───────────────┘
If a checked table is corrupted, automatically fix it. Any necessary repairs are done
after all tables have been checked.
• **--bind-address=**_ip_address_
┌────────────────────┬───────────────────────────┐
│**Command-Line** **Format** │ --bind-address=ip_address │
└────────────────────┴───────────────────────────┘
On a computer having multiple network interfaces, use this option to select which
interface to use for connecting to the MySQL server.
• **--character-sets-dir=**_dir_name_
┌────────────────────┬───────────────────────────────┐
│**Command-Line** **Format** │ --character-sets-dir=dir_name │
├────────────────────┼───────────────────────────────┤
│**Type** │ Directory name │
└────────────────────┴───────────────────────────────┘
The directory where character sets are installed. See Section 12.15, “Character Set
Configuration”.
• **--check**, **-c**
┌────────────────────┬─────────┐
│**Command-Line** **Format** │ --check │
└────────────────────┴─────────┘
Check the tables for errors. This is the default operation.
• **--check-only-changed**, **-C**
┌────────────────────┬──────────────────────┐
│**Command-Line** **Format** │ --check-only-changed │
└────────────────────┴──────────────────────┘
Check only tables that have changed since the last check or that have not been closed
properly.
• **--check-upgrade**, **-g**
┌────────────────────┬─────────────────┐
│**Command-Line** **Format** │ --check-upgrade │
└────────────────────┴─────────────────┘
Invoke CHECK TABLE with the FOR UPGRADE option to check tables for incompatibilities with
the current version of the server.
• **--compress**
┌────────────────────┬───────────────────────┐
│**Command-Line** **Format** │ --compress[={OFF|ON}] │
├────────────────────┼───────────────────────┤
│**Deprecated** │ 8.0.18 │
├────────────────────┼───────────────────────┤
│**Type** │ Boolean │
├────────────────────┼───────────────────────┤
│**Default** **Value** │ OFF │
└────────────────────┴───────────────────────┘
Compress all information sent between the client and the server if possible. See
Section 6.2.8, “Connection Compression Control”.
As of MySQL 8.0.18, this option is deprecated. Expect it to be removed in a future
version of MySQL. See the section called “Configuring Legacy Connection Compression”.
• **--compression-algorithms=**_value_
┌────────────────────┬────────────────────────────────┐
│**Command-Line** **Format** │ --compression-algorithms=value │
├────────────────────┼────────────────────────────────┤
│**Introduced** │ 8.0.18 │
├────────────────────┼────────────────────────────────┤
│**Type** │ Set │
├────────────────────┼────────────────────────────────┤
│**Default** **Value** │ uncompressed │
├────────────────────┼────────────────────────────────┤
│**Valid** **Values** │ │
│ │ zlib │
│ │ │
│ │ zstd │
│ │ │
│ │ uncompressed │
└────────────────────┴────────────────────────────────┘
The permitted compression algorithms for connections to the server. The available
algorithms are the same as for the protocol_compression_algorithms system variable. The
default value is uncompressed.
For more information, see Section 6.2.8, “Connection Compression Control”.
This option was added in MySQL 8.0.18.
• **--databases**, **-B**
┌────────────────────┬─────────────┐
│**Command-Line** **Format** │ --databases │
└────────────────────┴─────────────┘
Process all tables in the named databases. Normally, **mysqlcheck** treats the first name
argument on the command line as a database name and any following names as table names.
With this option, it treats all name arguments as database names.
• **--debug[=**_debug_options_**]**, **-#** **[**_debug_options_**]**
┌────────────────────┬─────────────────────────┐
│**Command-Line** **Format** │ --debug[=debug_options] │
├────────────────────┼─────────────────────────┤
│**Type** │ String │
├────────────────────┼─────────────────────────┤
│**Default** **Value** │ d:t:o │
└────────────────────┴─────────────────────────┘
Write a debugging log. A typical _debug_options_ string is d:t:o,_file_name_. The default is
d:t:o.
This option is available only if MySQL was built using **WITH**___**DEBUG**. MySQL release binaries
provided by Oracle are _not_ built using this option.
• **--debug-check**
┌────────────────────┬───────────────┐
│**Command-Line** **Format** │ --debug-check │
├────────────────────┼───────────────┤
│**Type** │ Boolean │
├────────────────────┼───────────────┤
│**Default** **Value** │ FALSE │
└────────────────────┴───────────────┘
Print some debugging information when the program exits.
This option is available only if MySQL was built using **WITH**___**DEBUG**. MySQL release binaries
provided by Oracle are _not_ built using this option.
• **--debug-info**
┌────────────────────┬──────────────┐
│**Command-Line** **Format** │ --debug-info │
├────────────────────┼──────────────┤
│**Type** │ Boolean │
├────────────────────┼──────────────┤
│**Default** **Value** │ FALSE │
└────────────────────┴──────────────┘
Print debugging information and memory and CPU usage statistics when the program exits.
This option is available only if MySQL was built using **WITH**___**DEBUG**. MySQL release binaries
provided by Oracle are _not_ built using this option.
• **--default-character-set=**_charset_name_
┌────────────────────┬──────────────────────┐
│**Command-Line** **Format** │ --default-character- │
│ │ set=charset_name │
├────────────────────┼──────────────────────┤
│**Type** │ String │
└────────────────────┴──────────────────────┘
Use _charset_name_ as the default character set. See Section 12.15, “Character Set
Configuration”.
• **--defaults-extra-file=**_file_name_
┌────────────────────┬─────────────────────────────────┐
│**Command-Line** **Format** │ --defaults-extra-file=file_name │
├────────────────────┼─────────────────────────────────┤
│**Type** │ File name │
└────────────────────┴─────────────────────────────────┘
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. If
_file_name_ is not an absolute path name, it is interpreted relative to the current
directory.
For additional information about this and other option-file options, see Section 6.2.2.3,
“Command-Line Options that Affect Option-File Handling”.
• **--defaults-file=**_file_name_
┌────────────────────┬───────────────────────────┐
│**Command-Line** **Format** │ --defaults-file=file_name │
├────────────────────┼───────────────────────────┤
│**Type** │ File name │
└────────────────────┴───────────────────────────┘
Use only the given option file. If the file does not exist or is otherwise inaccessible,
an error occurs. If _file_name_ is not an absolute path name, it is interpreted relative to
the current directory.
Exception: Even with **--defaults-file**, client programs read .mylogin.cnf.
For additional information about this and other option-file options, see Section 6.2.2.3,
“Command-Line Options that Affect Option-File Handling”.
• **--defaults-group-suffix=**_str_
┌────────────────────┬─────────────────────────────┐
│**Command-Line** **Format** │ --defaults-group-suffix=str │
├────────────────────┼─────────────────────────────┤
│**Type** │ String │
└────────────────────┴─────────────────────────────┘
Read not only the usual option groups, but also groups with the usual names and a suffix
of _str_. For example, **mysqlcheck** normally reads the [client] and [mysqlcheck] groups. If
this option is given as **--defaults-group-suffix=**___**other**, **mysqlcheck** also reads the
[client_other] and [mysqlcheck_other] groups.
For additional information about this and other option-file options, see Section 6.2.2.3,
“Command-Line Options that Affect Option-File Handling”.
• **--extended**, **-e**
┌────────────────────┬────────────┐
│**Command-Line** **Format** │ --extended │
└────────────────────┴────────────┘
If you are using this option to check tables, it ensures that they are 100% consistent
but takes a long time.
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!
• **--default-auth=**_plugin_
┌────────────────────┬───────────────────────┐
│**Command-Line** **Format** │ --default-auth=plugin │
├────────────────────┼───────────────────────┤
│**Type** │ String │
└────────────────────┴───────────────────────┘
A hint about which client-side authentication plugin to use. See Section 8.2.17,
“Pluggable Authentication”.
• **--enable-cleartext-plugin**
┌────────────────────┬───────────────────────────┐
│**Command-Line** **Format** │ --enable-cleartext-plugin │
├────────────────────┼───────────────────────────┤
│**Type** │ Boolean │
├────────────────────┼───────────────────────────┤
│**Default** **Value** │ FALSE │
└────────────────────┴───────────────────────────┘
Enable the mysql_clear_password cleartext authentication plugin. (See Section 8.4.1.4,
“Client-Side Cleartext Pluggable Authentication”.)
• **--fast**, **-F**
┌────────────────────┬────────┐
│**Command-Line** **Format** │ --fast │
└────────────────────┴────────┘
Check only tables that have not been closed properly.
• **--force**, **-f**
┌────────────────────┬─────────┐
│**Command-Line** **Format** │ --force │
└────────────────────┴─────────┘
Continue even if an SQL error occurs.
• **--get-server-public-key**
┌────────────────────┬─────────────────────────┐
│**Command-Line** **Format** │ --get-server-public-key │
├────────────────────┼─────────────────────────┤
│**Type** │ Boolean │
└────────────────────┴─────────────────────────┘
Request from the server the public key required for RSA key pair-based password exchange.
This option applies to clients that authenticate with the caching_sha2_password
authentication plugin. For that plugin, the server does not send the public key unless
requested. This option is ignored for accounts that do not authenticate with that plugin.
It is also ignored if RSA-based password exchange is not used, as is the case when the
client connects to the server using a secure connection.
If **--server-public-key-path=**_file_name_ is given and specifies a valid public key file, it
takes precedence over **--get-server-public-key**.
For information about the caching_sha2_password plugin, see Section 8.4.1.2, “Caching
SHA-2 Pluggable Authentication”.
• **--host=**_host_name_, **-h** _host_name_
┌────────────────────┬──────────────────┐
│**Command-Line** **Format** │ --host=host_name │
├────────────────────┼──────────────────┤
│**Type** │ String │
├────────────────────┼──────────────────┤
│**Default** **Value** │ localhost │
└────────────────────┴──────────────────┘
Connect to the MySQL server on the given host.
• **--login-path=**_name_
┌────────────────────┬───────────────────┐
│**Command-Line** **Format** │ --login-path=name │
├────────────────────┼───────────────────┤
│**Type** │ String │
└────────────────────┴───────────────────┘
Read options from the named login path in the .mylogin.cnf login path file. A “login
path” is an option group containing options that specify which MySQL server to connect to
and which account to authenticate as. To create or modify a login path file, use the
**mysql**___**config**___**editor** utility. See [mysql_config_editor(1)](https://www.chedong.com/phpMan.php/man/mysqlconfigeditor/1/markdown).
For additional information about this and other option-file options, see Section 6.2.2.3,
“Command-Line Options that Affect Option-File Handling”.
• **--medium-check**, **-m**
┌────────────────────┬────────────────┐
│**Command-Line** **Format** │ --medium-check │
└────────────────────┴────────────────┘
Do a check that is faster than an **--extended** operation. This finds only 99.99% of all
errors, which should be good enough in most cases.
• **--no-defaults**
┌────────────────────┬───────────────┐
│**Command-Line** **Format** │ --no-defaults │
└────────────────────┴───────────────┘
Do not read any option files. If program startup fails due to reading unknown options
from an option file, **--no-defaults** can be used to prevent them from being read.
The exception is that the .mylogin.cnf file is read in all cases, if it exists. This
permits passwords to be specified in a safer way than on the command line even when
**--no-defaults** is used. To create .mylogin.cnf, use the **mysql**___**config**___**editor** utility. See
[mysql_config_editor(1)](https://www.chedong.com/phpMan.php/man/mysqlconfigeditor/1/markdown).
For additional information about this and other option-file options, see Section 6.2.2.3,
“Command-Line Options that Affect Option-File Handling”.
• **--optimize**, **-o**
┌────────────────────┬────────────┐
│**Command-Line** **Format** │ --optimize │
└────────────────────┴────────────┘
Optimize the tables.
• **--password[=**_password_**]**, **-p[**_password_**]**
┌────────────────────┬───────────────────────┐
│**Command-Line** **Format** │ --password[=password] │
├────────────────────┼───────────────────────┤
│**Type** │ String │
└────────────────────┴───────────────────────┘
The password of the MySQL account used for connecting to the server. The password value
is optional. If not given, **mysqlcheck** prompts for one. If given, there must be _no_ _space_
between **--password=** or **-p** and the password following it. If no password option is
specified, the default is to send no password.
Specifying a password on the command line should be considered insecure. To avoid giving
the password on the command line, use an option file. See Section 8.1.2.1, “End-User
Guidelines for Password Security”.
To explicitly specify that there is no password and that **mysqlcheck** should not prompt for
one, use the **--skip-password** option.
• **--password1[=**_pass_val_**]** The password for multifactor authentication factor 1 of the MySQL
account used for connecting to the server. The password value is optional. If not given,
**mysqlcheck** prompts for one. If given, there must be _no_ _space_ between **--password1=** and the
password following it. If no password option is specified, the default is to send no
password.
Specifying a password on the command line should be considered insecure. To avoid giving
the password on the command line, use an option file. See Section 8.1.2.1, “End-User
Guidelines for Password Security”.
To explicitly specify that there is no password and that **mysqlcheck** should not prompt for
one, use the **--skip-password1** option.
**--password1** and **--password** are synonymous, as are **--skip-password1** and **--skip-password**.
• **--password2[=**_pass_val_**]** The password for multifactor authentication factor 2 of the MySQL
account used for connecting to the server. The semantics of this option are similar to
the semantics for **--password1**; see the description of that option for details.
• **--password3[=**_pass_val_**]** The password for multifactor authentication factor 3 of the MySQL
account used for connecting to the server. The semantics of this option are similar to
the semantics for **--password1**; see the description of that option for details.
• **--pipe**, **-W**
┌────────────────────┬────────┐
│**Command-Line** **Format** │ --pipe │
├────────────────────┼────────┤
│**Type** │ String │
└────────────────────┴────────┘
On Windows, connect to the server using a named pipe. This option applies only if the
server was started with the named_pipe system variable enabled to support named-pipe
connections. In addition, the user making the connection must be a member of the Windows
group specified by the named_pipe_full_access_group system variable.
• **--plugin-dir=**_dir_name_
┌────────────────────┬───────────────────────┐
│**Command-Line** **Format** │ --plugin-dir=dir_name │
├────────────────────┼───────────────────────┤
│**Type** │ Directory name │
└────────────────────┴───────────────────────┘
The directory in which to look for plugins. Specify this option if the **--default-auth**
option is used to specify an authentication plugin but **mysqlcheck** does not find it. See
Section 8.2.17, “Pluggable Authentication”.
• **--port=**_port_num_, **-P** _port_num_
┌────────────────────┬─────────────────┐
│**Command-Line** **Format** │ --port=port_num │
├────────────────────┼─────────────────┤
│**Type** │ Numeric │
├────────────────────┼─────────────────┤
│**Default** **Value** │ 3306 │
└────────────────────┴─────────────────┘
For TCP/IP connections, the port number to use.
• **--print-defaults**
┌────────────────────┬──────────────────┐
│**Command-Line** **Format** │ --print-defaults │
└────────────────────┴──────────────────┘
Print the program name and all options that it gets from option files.
For additional information about this and other option-file options, see Section 6.2.2.3,
“Command-Line Options that Affect Option-File Handling”.
• **--protocol={TCP|SOCKET|PIPE|MEMORY}**
┌────────────────────┬───────────────────┐
│**Command-Line** **Format** │ --protocol=type │
├────────────────────┼───────────────────┤
│**Type** │ String │
├────────────────────┼───────────────────┤
│**Default** **Value** │ [see text] │
├────────────────────┼───────────────────┤
│**Valid** **Values** │ │
│ │ TCP │
│ │ │
│ │ SOCKET │
│ │ │
│ │ PIPE │
│ │ │
│ │ MEMORY │
└────────────────────┴───────────────────┘
The transport protocol to use for connecting to the server. It is useful when the other
connection parameters normally result in use of a protocol other than the one you want.
For details on the permissible values, see Section 6.2.7, “Connection Transport
Protocols”.
• **--quick**, **-q**
┌────────────────────┬─────────┐
│**Command-Line** **Format** │ --quick │
└────────────────────┴─────────┘
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.
If you are using this option to repair tables, it tries to repair only the index tree.
This is the fastest repair method.
• **--repair**, **-r**
┌────────────────────┬──────────┐
│**Command-Line** **Format** │ --repair │
└────────────────────┴──────────┘
Perform a repair that can fix almost anything except unique keys that are not unique.
• **--server-public-key-path=**_file_name_
┌────────────────────┬──────────────────────┐
│**Command-Line** **Format** │ --server-public-key- │
│ │ path=file_name │
├────────────────────┼──────────────────────┤
│**Type** │ File name │
└────────────────────┴──────────────────────┘
The path name to a file in PEM format containing a client-side copy of the public key
required by the server for RSA key pair-based password exchange. This option applies to
clients that authenticate with the sha256_password or caching_sha2_password
authentication plugin. This option is ignored for accounts that do not authenticate with
one of those plugins. It is also ignored if RSA-based password exchange is not used, as
is the case when the client connects to the server using a secure connection.
If **--server-public-key-path=**_file_name_ is given and specifies a valid public key file, it
takes precedence over **--get-server-public-key**.
For sha256_password, this option applies only if MySQL was built using OpenSSL.
For information about the sha256_password and caching_sha2_password plugins, see
Section 8.4.1.3, “SHA-256 Pluggable Authentication”, and Section 8.4.1.2, “Caching SHA-2
Pluggable Authentication”.
• **--shared-memory-base-name=**_name_
┌────────────────────┬────────────────────────────────┐
│**Command-Line** **Format** │ --shared-memory-base-name=name │
├────────────────────┼────────────────────────────────┤
│**Platform** **Specific** │ Windows │
└────────────────────┴────────────────────────────────┘
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.
This option applies only if the server was started with the shared_memory system variable
enabled to support shared-memory connections.
• **--silent**, **-s**
┌────────────────────┬──────────┐
│**Command-Line** **Format** │ --silent │
└────────────────────┴──────────┘
Silent mode. Print only error messages.
• **--skip-database=**_db_name_
┌────────────────────┬─────────────────────────┐
│**Command-Line** **Format** │ --skip-database=db_name │
└────────────────────┴─────────────────────────┘
Do not include the named database (case-sensitive) in the operations performed by
**mysqlcheck**.
• **--socket=**_path_, **-S** _path_
┌────────────────────┬────────────────────────────────┐
│**Command-Line** **Format** │ --socket={file_name|pipe_name} │
├────────────────────┼────────────────────────────────┤
│**Type** │ String │
└────────────────────┴────────────────────────────────┘
For connections to localhost, the Unix socket file to use, or, on Windows, the name of
the named pipe to use.
On Windows, this option applies only if the server was started with the named_pipe system
variable enabled to support named-pipe connections. In addition, the user making the
connection must be a member of the Windows group specified by the
named_pipe_full_access_group system variable.
• **--ssl*** Options that begin with **--ssl** specify whether to connect to the server using
encryption and indicate where to find SSL keys and certificates. See the section called
“Command Options for Encrypted Connections”.
• **--ssl-fips-mode={OFF|ON|STRICT}**
┌────────────────────┬─────────────────────────────────┐
│**Command-Line** **Format** │ --ssl-fips-mode={OFF|ON|STRICT} │
├────────────────────┼─────────────────────────────────┤
│**Deprecated** │ 8.0.34 │
├────────────────────┼─────────────────────────────────┤
│**Type** │ Enumeration │
├────────────────────┼─────────────────────────────────┤
│**Default** **Value** │ OFF │
├────────────────────┼─────────────────────────────────┤
│**Valid** **Values** │ │
│ │ OFF │
│ │ │
│ │ ON │
│ │ │
│ │ STRICT │
└────────────────────┴─────────────────────────────────┘
Controls whether to enable FIPS mode on the client side. The **--ssl-fips-mode** option
differs from other **--ssl-**_xxx_ options in that it is not used to establish encrypted
connections, but rather to affect which cryptographic operations to permit. See
Section 8.8, “FIPS Support”.
These **--ssl-fips-mode** values are permitted:
• OFF: Disable FIPS mode.
• ON: Enable FIPS mode.
• STRICT: Enable “strict” FIPS mode.
**Note**
If the OpenSSL FIPS Object Module is not available, the only permitted value for
**--ssl-fips-mode** is OFF. In this case, setting **--ssl-fips-mode** to ON or STRICT causes
the client to produce a warning at startup and to operate in non-FIPS mode.
As of MySQL 8.0.34, this option is deprecated. Expect it to be removed in a future
version of MySQL.
• **--tables**
┌────────────────────┬──────────┐
│**Command-Line** **Format** │ --tables │
└────────────────────┴──────────┘
Override the **--databases** or **-B** option. All name arguments following the option are
regarded as table names.
• **--tls-ciphersuites=**_ciphersuite_list_
┌────────────────────┬───────────────────────────────┐
│**Command-Line** **Format** │ --tls- │
│ │ ciphersuites=ciphersuite_list │
├────────────────────┼───────────────────────────────┤
│**Introduced** │ 8.0.16 │
├────────────────────┼───────────────────────────────┤
│**Type** │ String │
└────────────────────┴───────────────────────────────┘
The permissible ciphersuites for encrypted connections that use TLSv1.3. The value is a
list of one or more colon-separated ciphersuite names. The ciphersuites that can be named
for this option depend on the SSL library used to compile MySQL. For details, see
Section 8.3.2, “Encrypted Connection TLS Protocols and Ciphers”.
This option was added in MySQL 8.0.16.
• **--tls-version=**_protocol_list_
┌─────────────────────────┬──────────────────────────────────────────┐
│**Command-Line** **Format** │ --tls-version=protocol_list │
├─────────────────────────┼──────────────────────────────────────────┤
│**Type** │ String │
├─────────────────────────┼──────────────────────────────────────────┤
│**Default** **Value** **(**≥≥ **8.0.16)** │ │
│ │ TLSv1,TLSv1.1,TLSv1.2,TLSv1.3 │
│ │ (OpenSSL 1.1.1 or │
│ │ higher) │
│ │ │
│ │ TLSv1,TLSv1.1,TLSv1.2 │
│ │ (otherwise) │
├─────────────────────────┼──────────────────────────────────────────┤
│**Default** **Value** **(**≤≤ **8.0.15)** │ TLSv1,TLSv1.1,TLSv1.2 │
└─────────────────────────┴──────────────────────────────────────────┘
The permissible TLS protocols for encrypted connections. The value is a list of one or
more comma-separated protocol names. The protocols that can be named for this option
depend on the SSL library used to compile MySQL. For details, see Section 8.3.2,
“Encrypted Connection TLS Protocols and Ciphers”.
• **--use-frm**
┌────────────────────┬───────────┐
│**Command-Line** **Format** │ --use-frm │
└────────────────────┴───────────┘
For repair operations on MyISAM tables, get the table structure from the data dictionary
so that the table can be repaired even if the .MYI header is corrupted.
• **--user=**_user_name_, **-u** _user_name_
┌────────────────────┬───────────────────┐
│**Command-Line** **Format** │ --user=user_name, │
├────────────────────┼───────────────────┤
│**Type** │ String │
└────────────────────┴───────────────────┘
The user name of the MySQL account to use for connecting to the server.
• **--verbose**, **-v**
┌────────────────────┬───────────┐
│**Command-Line** **Format** │ --verbose │
└────────────────────┴───────────┘
Verbose mode. Print information about the various stages of program operation.
• **--version**, **-V**
┌────────────────────┬───────────┐
│**Command-Line** **Format** │ --version │
└────────────────────┴───────────┘
Display version information and exit.
• **--write-binlog**
┌────────────────────┬────────────────┐
│**Command-Line** **Format** │ --write-binlog │
└────────────────────┴────────────────┘
This option is enabled by default, so that ANALYZE TABLE, OPTIMIZE TABLE, and REPAIR
TABLE statements generated by **mysqlcheck** are written to the binary log. Use
**--skip-write-binlog** to cause NO_WRITE_TO_BINLOG to be added to the statements so that
they are not logged. Use the **--skip-write-binlog** when these statements should not be sent
to replicas or run when using the binary logs for recovery from backup.
• **--zstd-compression-level=**_level_
┌────────────────────┬────────────────────────────┐
│**Command-Line** **Format** │ --zstd-compression-level=# │
├────────────────────┼────────────────────────────┤
│**Introduced** │ 8.0.18 │
├────────────────────┼────────────────────────────┤
│**Type** │ Integer │
└────────────────────┴────────────────────────────┘
The compression level to use for connections to the server that use the zstd compression
algorithm. The permitted levels are from 1 to 22, with larger values indicating
increasing levels of compression. The default zstd compression level is 3. The
compression level setting has no effect on connections that do not use zstd compression.
For more information, see Section 6.2.8, “Connection Compression Control”.
This option was added in MySQL 8.0.18.
## COPYRIGHT
Copyright © 1997, 2024, Oracle and/or its affiliates.
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.
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.
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 .
## 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 .
## AUTHOR
Oracle Corporation ().
MySQL 8.0 12/13/2024 [MYSQLCHECK(1)](https://www.chedong.com/phpMan.php/man/MYSQLCHECK/1/markdown)