Error
Error Code:
1646
MySQL Error 1646: Invalid SIGNAL CONDITION Definition
Description
This error occurs when a `SIGNAL` or `RESIGNAL` statement attempts to use a `CONDITION` that was not explicitly defined with a `SQLSTATE` value. MySQL requires that conditions handled by `SIGNAL`/`RESIGNAL` statements within stored programs (procedures, functions, triggers) are linked to a specific `SQLSTATE` code. This ensures proper error identification and management.
Error Message
SIGNAL/RESIGNAL can only use a CONDITION defined with SQLSTATE
Known Causes
3 known causesCONDITION Lacks SQLSTATE
A `DECLARE CONDITION` statement was used without specifying the `SQLSTATE` clause, which is mandatory for conditions intended to be used with `SIGNAL` or `RESIGNAL`.
Undeclared or Mismatched CONDITION
The `SIGNAL` or `RESIGNAL` statement refers to a `CONDITION` name that has not been declared, or the declared condition does not meet the `SQLSTATE` requirement.
Incorrect CONDITION Declaration Syntax
The syntax used to declare the `CONDITION` is incorrect, specifically omitting or misplacing the `SQLSTATE` clause in the `DECLARE CONDITION` statement.
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