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How to Fix MySQL Error 1345 – SQLSTATE: HY000 (ER_FRM_UNKNOWN_TYPE) File ‘%s’ has unknown type ‘%s’ in its header

How to Fix MySQL Error 1345 – SQLSTATE: HY000 (ER_FRM_UNKNOWN_TYPE) File ‘%s’ has unknown type ‘%s’ in its header

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 1345 – SQLSTATE: HY000 (ER_FRM_UNKNOWN_TYPE) which occurs when a file has an unknown type in its header. In this article, we will explore the causes of this error and provide solutions to fix it.

Causes of MySQL Error 1345 – SQLSTATE: HY000 (ER_FRM_UNKNOWN_TYPE)

There are several reasons why you might encounter this error:

  • Corrupted table definition file: The error can occur if the table definition file (with the .frm extension) is corrupted or contains invalid data.
  • Incompatible MySQL version: The table definition file might have been created with a different version of MySQL that is not compatible with the current version.
  • Incorrect file permissions: If the file permissions are not set correctly, MySQL may not be able to read or access the table definition file.

Fixing MySQL Error 1345 – SQLSTATE: HY000 (ER_FRM_UNKNOWN_TYPE)

Here are some solutions to resolve the MySQL Error 1345 – SQLSTATE: HY000 (ER_FRM_UNKNOWN_TYPE) issue:

1. Check for table definition file corruption

If the table definition file is corrupted, you can try to repair it using the MySQL repair table command. Open a terminal or command prompt and run the following command:

mysqlcheck -r your_database_name your_table_name

Replace your_database_name with the name of your database and your_table_name with the name of the table that is causing the error. This command will attempt to repair the table definition file and fix any corruption issues.

2. Recreate the table definition file

If repairing the table definition file doesn’t work, you can try recreating it. First, make a backup of the existing table definition file by renaming it or moving it to a different location. Then, run the following command to recreate the table:

CREATE TABLE your_table_name (...) ENGINE=InnoDB;

Replace your_table_name with the name of your table and provide the necessary column definitions and table options. This command will create a new table definition file and should resolve the error if the issue was with the old file.

3. Check file permissions

Ensure that the file permissions for the table definition file are set correctly. The file should be readable and accessible by the MySQL server. You can use the following command to set the correct permissions:

chmod 644 your_table_name.frm

Replace your_table_name.frm with the actual filename of the table definition file. This command sets the file permissions to read and write for the owner and read-only for others.

Summary

In conclusion, MySQL Error 1345 – SQLSTATE: HY000 (ER_FRM_UNKNOWN_TYPE) can occur due to a corrupted table definition file, incompatible MySQL versions, or incorrect file permissions. To fix this error, you can try repairing the table definition file, recreating it, or checking and setting the correct file permissions. If you need further assistance with MySQL or VPS hosting, consider reaching out to Server.HK, a reliable VPS hosting provider.