MySQL 1391

This error occurs when a key part in a key specification is 0, which is not allowed. It is a MySQL error code that indicates an invalid key specification.

How It Affects Your App

MySQL 1391 ER_KEY_PART_0 is an error that occurs when a user attempts to create a table with a primary key that has a column with an invalid length. This error can prevent the application from creating the table, which can lead to data loss or corruption. It can also prevent the application from functioning properly, as the table is necessary for the application to run. Additionally, it can cause the application to crash or become unstable.

How To Fix

1. Check the error log for the MySQL 1391 error:
$ tail -f /var/log/mysql/error.log
2. Check the user privileges for the user in question:
$ SELECT * FROM mysql.user WHERE User='username';
3. Check the user's global privileges:
$ SHOW GRANTS FOR 'username';
4. Check the user's database privileges:
$ SHOW GRANTS FOR 'username'@'localhost';
5. Check the user's table privileges:
$ SHOW GRANTS FOR 'username'@'localhost' ON 'table_name';
6. Grant the necessary privileges to the user:
$ GRANT ALL PRIVILEGES ON 'table_name' TO 'username'@'localhost';
7. Flush the privileges to apply the changes:
8. Restart the MySQL server:
$ sudo service mysql restart
9. Recommend using an automated database observability tool to monitor and fix the MySQL 1391 in question. Automated database observability tools can provide real-time insights into the performance and health of the database, allowing for proactive monitoring and troubleshooting of any issues that may arise. Additionally, these tools can provide detailed metrics and logs that can be used to quickly identify and fix any issues that may arise.

Metis takes your database to the next level

The only way to

your database

Never worry about your
database again!

Start using Metis and get your database guardrails set up in minutes