Error
Error Code:
1800
MariaDB Error 1800: Unknown ALTER ALGORITHM
Description
MariaDB Error 1800, 'Unknown ALGORITHM '%s'', occurs when a SQL statement, typically an ALTER TABLE operation, specifies an ALGORITHM option that is not recognized or supported by the current MariaDB server version or the specific storage engine of the table being modified. This indicates an invalid choice for how the alteration should be performed.
Error Message
Unknown ALGORITHM '%s'
Known Causes
3 known causesUnsupported Algorithm Version
The ALGORITHM specified (e.g., INSTANT, INPLACE, COPY) is not supported by your current MariaDB server version for the particular DDL operation.
Storage Engine Incompatibility
The chosen ALGORITHM is not compatible with the storage engine (e.g., InnoDB, MyISAM) of the table you are attempting to alter.
Typo in ALGORITHM Keyword
A syntax error or typo in the ALGORITHM keyword or its value prevents the MariaDB server from recognizing the intended option.
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