Error
Error Code:
1644
MySQL Error 1644: Unhandled User Exception in Stored Code
Description
This error indicates that a `SIGNAL` statement was executed within a MySQL stored procedure, function, or trigger, raising a user-defined exception condition. However, no corresponding `DECLARE ... HANDLER` statement was defined or active to catch and process this specific exception, leading to the program's termination.
Error Message
Unhandled user-defined exception condition
Known Causes
4 known causesMissing Exception Handler
A `SIGNAL` statement was executed within a stored program, but no `DECLARE ... HANDLER` was defined to catch the specific SQLSTATE or condition it raised.
Handler Scope Mismatch
An exception handler might exist, but it was not active or in the correct block scope to catch the `SIGNAL` statement that was executed.
Generic Exception Uncaught
A `SIGNAL` statement raised a generic SQLSTATE (e.g., 'HY000'), but only handlers for more specific conditions were defined, leaving the generic exception unhandled.
Flawed Program Logic
The flow of execution in a stored procedure or function unexpectedly reached a `SIGNAL` statement due to an error in the program's conditional logic.
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