Error
Error Code:
1800
MySQL Error 1800: Unsupported ALTER TABLE Algorithm
Description
This error indicates that an `ALTER TABLE` statement was executed with an `ALGORITHM` clause that MySQL does not recognize or support for the specified operation. It commonly occurs when attempting online DDL operations with an incompatible or non-existent algorithm.
Error Message
Unknown ALGORITHM '%s'
Known Causes
3 known causesInvalid Algorithm Specified
The `ALGORITHM` keyword used in the `ALTER TABLE` statement is not a recognized option for MySQL.
Algorithm Not Supported
The chosen `ALGORITHM` (e.g., `INPLACE`, `COPY`, `INSTANT`) is not supported for the specific `ALTER TABLE` operation or your MySQL server version.
Typo or Case Sensitivity
A misspelling or incorrect casing of the `ALGORITHM` keyword can prevent MySQL from recognizing it.
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