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MYSQL_UPGRADE(1)             MySQL Database System            MYSQL_UPGRADE(1)

       mysql_upgrade - check and upgrade MySQL tables

       mysql_upgrade [options]

       mysql_upgrade examines all tables in all databases for incompatibilities with the current version of MySQL
       Server.  mysql_upgrade also upgrades the system tables so that you can take advantage of new privileges or
       capabilities that might have been added.

       If mysql_upgrade finds that a table has a possible incompatibility, it performs a table check and, if problems
       are found, attempts a table repair. If the table cannot be repaired, see Section 2.11.4, "Rebuilding or
       Repairing Tables or Indexes" for manual table repair strategies.

       You should execute mysql_upgrade each time you upgrade MySQL.

       If you install MySQL from RPM packages on Linux, you must install the server and client RPMs.  mysql_upgrade is
       included in the server RPM but requires the client RPM because the latter includes mysqlcheck. (See
       Section 2.5.5, "Installing MySQL on Linux Using RPM Packages from Oracle".)

           On Windows Server 2008, Vista, and newer, you must run mysql_upgrade with administrator privileges. You can
           do this by running a Command Prompt as Administrator and running the command. Failure to do so may result
           in the upgrade failing to execute correctly.

           You should always back up your current MySQL installation before performing an upgrade. See Section 7.2,
           "Database Backup Methods".

           Some upgrade incompatibilities may require special handling before you upgrade your MySQL installation and
           run mysql_upgrade. See Section 2.11.1, "Upgrading MySQL", for instructions on determining whether any such
           incompatibilities apply to your installation and how to handle them.

       To use mysql_upgrade, make sure that the server is running. Then invoke it like this:

           shell> mysql_upgrade [options]

       After running mysql_upgrade, stop the server and restart it so that any changes made to the system tables take

       If you have multiple MySQL server instances running, invoke mysql_upgrade with connection parameters
       appropriate for connecting to the desired server. For example, with servers running on the local host on parts
       3306 through 3308, upgrade each of them by connecting to the appropriate port:

           shell> mysql_upgrade --protocol=tcp -P 3306 [other_options]
           shell> mysql_upgrade --protocol=tcp -P 3307 [other_options]
           shell> mysql_upgrade --protocol=tcp -P 3308 [other_options]

       For local host connections on Unix, the --protocol=tcp option forces a connection using TCP/IP rather than the
       Unix socket file.

       mysql_upgrade executes the following commands to check and repair tables and to upgrade the system tables:

           mysqlcheck --no-defaults --databases
            --fix-db-names --fix-table-names mysql
           mysqlcheck --no-defaults --check-upgrade --databases
            --auto-repair mysql
           mysql < fix_priv_tables
           mysqlcheck --no-defaults --all-databases
            --skip-database=mysql --fix-db-names --fix-table-names
           mysqlcheck --no-defaults --check-upgrade --all-databases
            --skip-database=mysql --auto-repair

       Notes about the preceding commands:

       ?   mysql_upgrade also adds --write-binlog or --skip-write-binlog to the mysqlcheck commands, depending on
           whether the --write-binlog option was specified on the mysql_upgrade command.

       ?   Because mysql_upgrade invokes mysqlcheck with the --all-databases option, it processes all tables in all
           databases, which might take a long time to complete. Each table is locked and therefore unavailable to
           other sessions while it is being processed. Check and repair operations can be time-consuming, particularly
           for large tables.

       ?   For details about what checks the --check-upgrade option entails, see the description of the FOR UPGRADE
           option of the CHECK TABLE statement (see Section, "CHECK TABLE Syntax").

       ?   fix_priv_tables represents a script generated internally by mysql_upgrade that contains SQL statements to
           upgrade the tables in the mysql database.

       All checked and repaired tables are marked with the current MySQL version number. This ensures that next time
       you run mysql_upgrade with the same version of the server, it can tell whether there is any need to check or
       repair the table again.

       mysql_upgrade also saves the MySQL version number in a file named mysql_upgrade_info in the data directory.
       This is used to quickly check whether all tables have been checked for this release so that table-checking can
       be skipped. To ignore this file and perform the check regardless, use the --force option.

       mysql_upgrade does not upgrade the contents of the help tables. For upgrade instructions, see Section 5.1.9,
       "Server-Side Help".

       By default, mysql_upgrade runs as the MySQL root user. If the root password is expired when you run
       mysql_upgrade, you will see a message that your password is expired and that mysql_upgrade failed as a result.
       To correct this, reset the root password to unexpire it and run mysql_upgrade again:

           shell> mysql -u root -p
           Enter password: ****  <- enter root password here
           mysql> SET PASSWORD = PASSWORD('root-password');
           mysql> quit
           shell> mysql_upgrade [options]

       mysql_upgrade supports the following options, which can be specified on the command line or in the
       [mysql_upgrade] and [client] groups of an option file. Unrecognized options are passed to mysqlcheck. For
       information about option files, see Section 4.2.6, "Using Option Files".

       ?   --help

           Display a short help message and exit.

       ?   --basedir=dir_name

           The path to the MySQL installation directory. This option is accepted for backward compatibility but
           ignored. It is removed in MySQL 5.7.

       ?   --character-sets-dir=dir_name

           The directory where character sets are installed. See Section 10.5, "Character Set Configuration".

       ?   --compress

           Compress all information sent between the client and the server if both support compression.

       ?   --datadir=dir_name

           The path to the data directory. This option is accepted for backward compatibility but ignored. It is
           removed in MySQL 5.7.

       ?   --debug[=debug_options], -# [debug_options]

           Write a debugging log. A typical debug_options string is d:t:o,file_name. The default is

       ?   --debug-check

           Print some debugging information when the program exits.

       ?   --debug-info, -T

           Print debugging information and memory and CPU usage statistics when the program exits.

       ?   --default-auth=plugin

           A hint about the client-side authentication plugin to use. See Section 6.3.7, "Pluggable Authentication".

           This option was added in MySQL 5.6.2.

       ?   --default-character-set=charset_name

           Use charset_name as the default character set. See Section 10.5, "Character Set Configuration".

       ?   --defaults-extra-file=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.  file_name is interpreted relative to the
           current directory if given as a relative path name rather than a full path name.

       ?   --defaults-file=file_name

           Use only the given option file. If the file does not exist or is otherwise inaccessible, an error occurs.
           file_name is interpreted relative to the current directory if given as a relative path name rather than a
           full path name.

       ?   --defaults-group-suffix=str

           Read not only the usual option groups, but also groups with the usual names and a suffix of str. For
           example, mysql_upgrade normally reads the [client] and [mysql_upgrade] groups. If the
           --defaults-group-suffix=_other option is given, mysql_upgrade also reads the [client_other] and
           [mysql_upgrade_other] groups.

       ?   --force

           Ignore the mysql_upgrade_info file and force execution even if mysql_upgrade has already been executed for
           the current version of MySQL.

       ?   --host=host_name, -h host_name

           Connect to the MySQL server on the given host.

       ?   --login-path=name

           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).
           This option was added in MySQL 5.6.6.

       ?   --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, 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 --no-defaults is used. (.mylogin.cnf is
           created by the mysql_config_editor utility. See mysql_config_editor(1).)

       ?   --password[=password], -p[password]

           The password to use when connecting to the server. If you use the short option form (-p), you cannot have a
           space between the option and the password. If you omit the password value following the --password or -p
           option on the command line, mysql_upgrade prompts for one.

           Specifying a password on the command line should be considered insecure. See Section, "End-User
           Guidelines for Password Security". You can use an option file to avoid giving the password on the command

       ?   --pipe, -W

           On Windows, connect to the server using a named pipe. This option applies only if the server supports
           named-pipe connections.

       ?   --plugin-dir=dir_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 mysql_upgrade does not find it. See Section 6.3.7, "Pluggable

           This option was added in MySQL 5.6.2.

       ?   --port=port_num, -P port_num

           The TCP/IP port number to use for the connection.

       ?   --print-defaults

           Print the program name and all options that it gets from option files.

       ?   --protocol={TCP|SOCKET|PIPE|MEMORY}

           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, "Connecting to the MySQL Server".

       ?   --shared-memory-base-name=name

           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.

           The server must be started with the --shared-memory option to enable shared-memory connections.

       ?   --socket=path, -S path

           For connections to localhost, the Unix socket file to use, or, on Windows, the name of the named pipe to

       ?   --ssl*

           Options that begin with --ssl specify whether to connect to the server using SSL and indicate where to find
           SSL keys and certificates. See Section 6.4.5, "Command Options for Secure Connections".

       ?   --tmpdir=dir_name, -t dir_name

           The path name of the directory to use for creating temporary files.

       ?   --upgrade-system-tables, -s

           Upgrade only the system tables, do not upgrade data.

       ?   --user=user_name, -u user_name

           The MySQL user name to use when connecting to the server. The default user name is root.

       ?   --verbose

           Verbose mode. Print more information about what the program does.

       ?   --version-check, -k

           Check the version of the server to which mysql_upgrade is connecting to verify that it is the same as the
           version for which mysql_upgrade was built. If not, mysql_upgrade exits. This option is enabled by default;
           to disable the check, use --skip-version-check. This option was added in MySQL 5.6.12.

       ?   --write-binlog

           Cause binary logging to be enabled while mysql_upgrade runs. In MySQL 5.6.6 and earlier, this was the
           default behavior. (To disable binary logging during the upgrade, it was necessary to use the inverse of
           this option, by starting the program with --skip-write-binlog.) Beginning with MySQL 5.6.7, binary logging
           by mysql_upgrade is disabled by default (Bug #14221043). Invoke the program explicitly with --write-binlog
           if you want its actions to be written to the binary log. (Also beginning with MySQL 5.6.7, the
           --skip-write-binlog option effectively does nothing.)

           Running mysql_upgrade is not recommended with a MySQL Server that is running with global transaction
           identifiers enabled (Bug #13833710). This is because enabling GTIDs means that any updates which
           mysql_upgrade might need to perform on system tables using a nontransactional storage engine such as MyISAM
           to fail. See Section, "Restrictions on Replication with GTIDs", for more information.

       Copyright (C) 1997, 2016, Oracle and/or its affiliates. All rights reserved.

       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

       For more information, please refer to the MySQL Reference Manual, which may already be installed locally and
       which is also available online at

       Oracle Corporation (

MySQL 5.6                         07/08/2016                  MYSQL_UPGRADE(1)