Error
Error Code:
1765
MySQL Error 1765: Cannot Set System Variable in Stored Code
Description
MySQL Error 1765 indicates an attempt to modify a system variable from within a stored function or trigger. MySQL restricts the setting of most system variables in these contexts to ensure predictable behavior and maintain data integrity within encapsulated database logic. This error typically occurs when a `SET <system_variable>` statement is encountered during the creation or execution of such a routine.
Error Message
The system variable %s cannot be set in stored functions or triggers.
Known Causes
3 known causesDirect System Variable Modification
The most common cause is the direct use of a `SET` statement to change a MySQL system variable (e.g., `SET GLOBAL max_connections = 100`) inside a stored function or trigger body.
Indirect Modification via Called Routine
A stored function or trigger might call another stored procedure or function that, in turn, attempts to modify a system variable, leading to this error propagating back to the original caller.
Misunderstanding Routine Scope
Developers might mistakenly assume that the same privileges or operational scope for system variable modification available in a direct client session also apply within the restricted environment of a stored function or trigger.
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