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How to Fix MySQL Error 1145 – SQLSTATE: 42000 (ER_GRANT_WRONG_HOST_OR_USER) The host or user argument to GRANT is too long

How to Fix MySQL Error 1145 – SQLSTATE: 42000 (ER_GRANT_WRONG_HOST_OR_USER) The host or user argument to GRANT is too long

MySQL is a popular open-source relational database management system used by many websites and applications. However, like any software, it can encounter errors that can disrupt its normal operation. One such error is MySQL Error 1145 – SQLSTATE: 42000 (ER_GRANT_WRONG_HOST_OR_USER) which occurs when the host or user argument to the GRANT statement is too long. In this article, we will explore the causes of this error and provide solutions to fix it.

Causes of MySQL Error 1145

The MySQL Error 1145 occurs when the host or user argument provided in the GRANT statement exceeds the maximum length allowed by MySQL. The maximum length for these arguments is determined by the maximum length of the corresponding columns in the user and host tables of the MySQL system database.

By default, the maximum length for the host column is 60 characters, and the maximum length for the user column is 16 characters. If the host or user argument provided in the GRANT statement exceeds these limits, MySQL throws the Error 1145.

Fixing MySQL Error 1145

To fix the MySQL Error 1145, you can follow these steps:

1. Shorten the Host or User Argument

The simplest solution is to shorten the host or user argument provided in the GRANT statement. Make sure that the host argument does not exceed 60 characters and the user argument does not exceed 16 characters. For example:

GRANT ALL PRIVILEGES ON database.* TO 'myusername'@'myhost';

In the above example, ‘myusername’ should not exceed 16 characters, and ‘myhost’ should not exceed 60 characters.

2. Use IP Address Instead of Hostname

If shortening the host argument is not feasible, you can try using the IP address instead of the hostname. IP addresses are generally shorter than hostnames and can help you avoid the Error 1145. For example:

GRANT ALL PRIVILEGES ON database.* TO 'myusername'@'192.168.0.1';

In the above example, ‘192.168.0.1’ is the IP address instead of a hostname.

3. Modify the MySQL System Database

If you need to use longer host or user arguments, you can modify the MySQL system database to increase the maximum length of the corresponding columns. However, this approach requires caution and should only be done if you have a good understanding of the MySQL system database structure. It is recommended to backup the database before making any modifications.

Summary

MySQL Error 1145 – SQLSTATE: 42000 (ER_GRANT_WRONG_HOST_OR_USER) occurs when the host or user argument provided in the GRANT statement is too long. This error can be fixed by shortening the host or user argument, using an IP address instead of a hostname, or modifying the MySQL system database. If you encounter this error, follow the steps mentioned in this article to resolve it.

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