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MYSQL_UPGRADE(1)		      MySQL Database System			 MYSQL_UPGRADE(1)

NAME
       mysql_upgrade - check tables for MySQL upgrade

SYNOPSIS
       mysql_upgrade [options]

DESCRIPTION
       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.

       mysql_upgrade should be executed each time you upgrade MySQL. It supersedes the older
       mysql_fix_privilege_tables script, which should no longer be used.

       If a table is found to have a possible incompatibility, mysql_upgrade performs a table
       check. If any problems are found, a table repair is attempted. If the table cannot be
       repaired, see Section 2.4.4, "Rebuilding or Repairing Tables or Indexes" for manual table
       repair strategies.

	   Note
	   On Windows Server 2008 and Windows Vista, 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.

	   Caution
	   You should always back up your current MySQL installation before performing an
	   upgrade. See Section 6.2, "Database Backup Methods".

	   Some upgrade incompatibilities may require special handling before you upgrade your
	   MySQL installation and run mysql_upgrade. See Section 2.4.1, "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, and 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 effect.

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

	   mysqlcheck --all-databases --check-upgrade --auto-repair
	   mysql < fix_priv_tables
	   mysqlcheck --all-databases --check-upgrade --fix-db-names --fix-table-names

       Notes about the preceding commands:

       o   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.

       o   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 12.4.2.3, "CHECK
	   TABLE Syntax").

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

       o   Prior to MySQL 5.1.31, mysql_upgrade does not run the second mysqlcheck command, which
	   is necessary to re-encode database or table names that contain nonalphanumeric
	   characters. (They still appear after the upgrade with the #mysql50# prefix described
	   in Section 8.2.3, "Mapping of Identifiers to File Names".) If you have such database
	   or table names, execute the second mysqlcheck command manually after executing
	   mysql_upgrade.

       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.

       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 2.6.1, "Installing MySQL from RPM Packages on
       Linux".)

       In MySQL 5.1.7, mysql_upgrade was added as a shell script and worked only for Unix
       systems. As of MySQL 5.1.10, mysql_upgrade is an executable binary and is available on all
       systems.

       mysql_upgrade supports the following options, which can be specified on the command line
       or in the [mysql_upgrade] and [client] option file groups. Other options are passed to
       mysqlcheck. For example, it might be necessary to specify the --password[=password]
       option.	mysql_upgrade also supports the options for processing option files described at
       Section 4.2.3.3.1, "Command-Line Options that Affect Option-File Handling".

       o   --help

	   Display a short help message and exit.

       o   --basedir=path

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

       o   --datadir=path

	   The path to the data directory. This option is accepted for backward compatibility but
	   ignored.

       o   --debug-check

	   Print some debugging information when the program exits. This option was added in
	   MySQL 5.1.21.

       o   --debug-info, -T

	   Print debugging information and memory and CPU usage statistics when the program
	   exits. This option was added in MySQL 5.1.21.

       o   --force

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

       o   --tmpdir=path, -t path

	   The path name of the directory to use for creating temporary files. This option was
	   added in MySQL 5.1.25.

       o   --user=user_name, -u user_name

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

       o   --verbose

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

       o   --write-binlog

	   Cause binary logging to be enabled while mysql_upgrade runs. This is the default
	   behavior; to disable binary logging during the upgrade, use the inverse of this option
	   (that is, start the program with --skip-write-binlog).

	   This option was introduced in MySQL 5.1.40.

COPYRIGHT
       Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc.

       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 http://www.gnu.org/licenses/.

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/.

AUTHOR
       Sun Microsystems, Inc. (http://www.mysql.com/).

MySQL 5.1				    04/06/2010				 MYSQL_UPGRADE(1)
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