Error
Error Code:
1243
MySQL Error 1243: Unknown Prepared Statement Handler
Description
This error indicates that MySQL cannot find or identify a prepared statement handler that was referenced in an `EXECUTE` or `DEALLOCATE PREPARE` statement. It typically occurs when attempting to use a prepared statement that has not been properly initialized, has already been deallocated, or is being referenced incorrectly within the current database session.
Error Message
Unknown prepared statement handler (%.*s) given to %s
Known Causes
4 known causesStatement Not Prepared
The `PREPARE` statement was not successfully executed before attempting to `EXECUTE` or `DEALLOCATE` the statement, meaning the handler was never created.
Handler Already Deallocated
The prepared statement handler was already deallocated using `DEALLOCATE PREPARE` or the connection was closed, making it unavailable for further use.
Incorrect Handler Name
A typo or an incorrect variable was used when referencing the prepared statement handler, preventing MySQL from finding the correct statement.
Cross-Session Access
Attempting to use a prepared statement handler that was created in a different database session, as prepared statements are local to the session that created them.
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