Error
Error Code:
3951
MySQL Error 3951: Invalid UDF Argument Character Set
Description
This error indicates an attempt to specify a character set for an argument within a MySQL User-Defined Function (UDF) that is not of the `STRING` type. Character set properties are only applicable to string-based arguments, such as `CHAR`, `VARCHAR`, or `TEXT`, as they define how character data is encoded and collated.
Error Message
Character set can be set only for the UDF argument type STRING.
Known Causes
3 known causesIncorrect UDF Argument Type Definition
The UDF was defined with an argument type (e.g., `INTEGER`, `REAL`, `BOOLEAN`) for which a character set clause was subsequently attempted, even though it's not a string type.
Misunderstanding of Character Set Scope
Developers might mistakenly apply character set specifications to non-string UDF arguments, not realizing these properties are exclusive to textual data types.
Typo or Syntax Error in UDF Definition
A syntax error or typo in the `CREATE FUNCTION` statement might inadvertently lead to an attempt to set a character set on an incorrectly specified argument type.
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