Error
Error Code:
3952
MySQL Error 3952: UDF Charset String Type Mismatch
Description
This error occurs when you attempt to define a character set for a User-Defined Function (UDF) that does not return a `STRING` data type. MySQL strictly enforces that character set specification is only applicable to UDFs returning string values, as other types (like numeric or date) do not have character sets.
Error Message
Character set can be set only for the UDF RETURN type STRING.
Known Causes
3 known causesNon-String Return Type
The User-Defined Function (UDF) is defined to return a data type other than `STRING`, such as an integer, boolean, or date/time type.
Incorrect `CHARACTER SET` Clause
The `CHARACTER SET` clause was mistakenly included in the UDF definition for a return type that is not compatible with character set specifications.
Misunderstanding UDF Syntax
Lack of familiarity with the specific MySQL UDF syntax rules regarding the application of character sets to function return types.
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