There are two approaches for upgrading MySQL on Windows:
The approach you select depends on how the existing installation was performed. Before proceeding, review Chapter 10, Upgrading MySQL for additional information on upgrading MySQL that is not specific to Windows.
Whichever approach you choose, always back up your current MySQL installation before performing an upgrade. See Database Backup Methods.
Upgrades between milestone releases (or from a milestone release to a GA release) are not supported. Significant development changes take place in milestone releases and you may encounter compatibility issues or problems starting the server. For instructions on how to perform a logical upgrade with a milestone release, see Logical Upgrade.
MySQL Installer does not support upgrades between Community releases and Commercial releases. If you require this type of upgrade, perform it using the ZIP archive approach.
Performing an upgrade with MySQL Installer is the best approach when the current server installation was performed with it and the upgrade is within the current release series. MySQL Installer does not support upgrades between release series, such as from 5.5 to 5.6, and it does not provide an upgrade indicator to prompt you to upgrade. For instructions on upgrading between release series, see Upgrading MySQL Using the Windows ZIP Distribution.
To perform an upgrade using MySQL Installer:
Start MySQL Installer.
From the dashboard, click Catalog to download the latest changes to the catalog. The installed server can be upgraded only if the dashboard displays an arrow next to the version number of the server.
Click Upgrade. All products that have a newer version now appear in a list.Note
MySQL Installer deselects the server upgrade option for milestone releases (Pre-Release) in the same release series. In addition, it displays a warning to indicate that the upgrade is not supported, identifies the risks of continuing, and provides a summary of the steps to perform a logical upgrade manually. You can reselect server upgrade and proceed at your own risk.
Deselect all but the MySQL server product, unless you intend to upgrade other products at this time, and click.
Clickto start the download. When the download finishes, click to begin the upgrade operation.
Configure the server.
To perform an upgrade using the Windows ZIP archive distribution:
Download the latest Windows ZIP Archive distribution of MySQL from https://dev.mysql.com/downloads/.
If the server is running, stop it. If the server is installed as a service, stop the service with the following command from the command prompt:
C:\> SC STOP mysqld_service_name
Alternatively, use NET STOP
If you are not running the MySQL server as a service, use mysqladmin to stop it. For example, before upgrading from MySQL 5.5 to 5.6, use mysqladmin from MySQL 5.5 as follows:
C:\> "C:\Program Files\MySQL\MySQL Server 5.5\bin\mysqladmin" -u root shutdownNote
If the MySQL
rootuser account has a password, invoke mysqladmin with the
-poption and enter the password when prompted.
Extract the ZIP archive. You may either overwrite your existing MySQL installation (usually located at
C:\mysql), or install it into a different directory, such as
C:\mysql5. Overwriting the existing installation is recommended. However, for upgrades (as opposed to installing for the first time), you must remove the data directory from your existing MySQL installation to avoid replacing your current data files. To do so, follow these steps:
Unzip the ZIP archive in some location other than your current MySQL installation.
Remove the data directory.
Move the data directory from the current MySQL installation to the location of the just-removed data directory
Remove the current MySQL installation
Move the unzipped installation to the location of the just-removed installation
Restart the server. For example, use the SC START
mysqld_service_nameor NET START
mysqld_service_namecommand if you run MySQL as a service, or invoke mysqld directly otherwise.
As Administrator, run mysql_upgrade to check your tables, attempt to repair them if necessary, and update your grant tables if they have changed so that you can take advantage of any new capabilities. See mysql_upgrade — Check and Upgrade MySQL Tables.
If you encounter errors, see Section 5.5, “Troubleshooting a Microsoft Windows MySQL Server Installation”.