How to Repair a Corrupted \'mysql.user\' Table in XAMPP?

Repairing Corrupted XAMPP 'mysql.user' Table

Corrupted MySQL tables can be a major annoyance, especially when they prevent XAMPP from starting. When encountering an error like "Table '.mysqluser' is marked as crashed and should be repaired," it's crucial to address the issue promptly.

Cause of the Issue

This particular issue is often attributed to a known bug in MariaDB (the underlying database used in XAMPP), which can occur after password changes, particularly for the root user.

Repair Approach

1. Downgrade XAMPP (Optional)

For a quick solution, consider downgrading XAMPP to version 7.3.5, which is not affected by this bug.

2. Utilize 'skip-grant-tables' (Not Recommended)

Adding 'skip-grant-tables' in the my.ini file allows MySQL to start without table maintenance. This is a workaround but should be removed later.

3. Repair the Table

• Start MySQL with 'skip-grant-tables.'
• Open phpMyAdmin and navigate to the mysql.user table.
• Choose 'Analyze' and 'Repair table' from the 'With selected' dropdown.

4. Drop and Recreate Table (If Repair Fails)

• Drop the 'user' table using 'DROP TABLE user.'
• Recreate the table by copying the 'user.frm,' 'user.MYD,' and 'user.MYI' files from the XAMPP backup to the data directory.

5. Repair 'db' Table (Optional)

Some cases may require repairing the 'db' table as well, following step 3's procedure.

Note:

• Use this approach as a temporary fix until the next XAMPP release addresses the issue.
• Remember to remove 'skip-grant-tables' from my.ini after accessing the 'mysql.user' table.
• Always have a backup of your database before making any changes.

The above is the detailed content of How to Repair a Corrupted \'mysql.user\' Table in XAMPP?. For more information, please follow other related articles on the PHP Chinese website!