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MYSQL_UPGRADE(1)	     MySQL Database System	      MYSQL_UPGRADE(1)

       mysql_upgrade - check tables for MySQL upgrade

       mysql_upgrade [options]

       mysql_upgrade should be executed each time you upgrade MySQL. It checks
       all tables in all databases for incompatibilities with the current
       version of MySQL Server. If a table is found to have a possible
       incompatibility, it is checked. If any problems are found, the table is
       repaired.  mysql_upgrade also upgrades the system tables so that you
       can take advantage of new privileges or capabilities that might have
       been added.

       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
       if all tables have been checked for this release so that table-checking
       can be skipped. To ignore this file, use the --force option.

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

	  mysqlcheck --check-upgrade --all-databases --auto-repair

       mysql_upgrade supersedes the older mysql_fix_privilege_tables script.
       In MySQL 5.0.19, mysql_upgrade was added as a shell script and worked
       only for Unix systems. As of MySQL 5.0.25, mysql_upgrade is an
       executable binary and is available on all systems. On systems older
       than those supporting mysql_upgrade, you can execute the mysqlcheck
       command manually, and then upgrade your system tables as described in

       For details about what is checked, see the description of the FOR
       UPGRADE option of the CHECK TABLE statement (see Section 5.2.3, CHECK
       TABLE Syntax).

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

	  shell> mysql_upgrade [options]

       mysql_upgrade reads options from the command line and from the
       [mysql_upgrade] group in option files. It supports the following


	  Display a short help message and exit.


	  The path to the MySQL installation directory.


	  The path to the data directory.


	  Force execution of mysqlcheck even if mysql_upgrade has already been
	  executed for the current version of MySQL. (In other words, this
	  option causes the mysql_upgrade.info file to be ignored.)

	 --user=user_name, -u user_name

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


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

       Other options are passed to mysqlcheck and to
       mysql_fix_privilege_tables. For example, it might be necessary to
       specify the --password[=password] option.

       Copyright 1997-2006 MySQL AB

       This documentation is NOT distributed under a GPL license. Use of this
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       printed copy of this documentation solely for your own personal use.
       Conversion to other formats is allowed as long as the actual content is
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       that the documentation is disseminated together with the software on
       the same medium. Any other use, such as any dissemination of printed
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       representative of MySQL AB. MySQL AB reserves any and all rights to
       this documentation not expressly granted above.

       Please email  for more information.

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       MySQL AB (http://www.mysql.com/).  This software comes with no

MySQL 5.0			  12/20/2006		      MYSQL_UPGRADE(1)

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