Error
Error Code:
1801
MySQL Error 1801: Unknown LOCK Type in ALTER
Description
This error occurs when an `ALTER TABLE` statement attempts to use a `LOCK` type that is not recognized or supported by the MySQL server. It indicates an invalid specification for how the table should be locked during the alteration process.
Error Message
Unknown LOCK type '%s'
Known Causes
3 known causesTypographical Error in LOCK Clause
The specified `LOCK` type contains a typo or misspelling, preventing MySQL from recognizing it as a valid option.
Unsupported LOCK Type for MySQL Version
The `LOCK` type used in the `ALTER TABLE` statement is not supported by your current MySQL server version.
Invalid or Non-existent LOCK Keyword
The `LOCK` type provided does not correspond to any valid locking option available for `ALTER TABLE` operations in MySQL.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service