MYSQL_UPGRADE(1) MySQL Database System MYSQL_UPGRADE(1)
mysql_upgrade - check tables for MySQL upgrade
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
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
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.
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MySQL 5.0 12/20/2006 MYSQL_UPGRADE(1)