Error
Error Code:
1294
MariaDB Error 1294: Invalid ON UPDATE Clause
Description
This error occurs when a column definition includes an `ON UPDATE` clause that is not supported or is incorrectly structured for the column's data type or context. It typically arises during `CREATE TABLE` or `ALTER TABLE` statements when attempting to define automatic updates for a column, often with `TIMESTAMP` or `DATETIME` types.
Error Message
Invalid ON UPDATE clause for '%s' column
Known Causes
4 known causesUnsupported Column Data Type
The `ON UPDATE` clause is applied to a column type (e.g., INT, VARCHAR) that does not support automatic updates, such as `CURRENT_TIMESTAMP`.
Invalid Update Expression
The expression provided within the `ON UPDATE` clause is not a valid or recognized value, such as `CURRENT_TIMESTAMP`, for automatic updates.
Syntax Error in Clause
A basic syntax mistake exists within the `ON UPDATE` clause, such as a typo, missing parenthesis, or incorrect keyword usage.
Conflicting Column Definitions
The combination of `ON UPDATE` with other column attributes (e.g., `DEFAULT` value) or with multiple auto-updating columns might conflict with MariaDB version-specific rules.
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