Error
Error Code:
4149
MySQL Error 4149: Unexpected Characters After NULL Escape
Description
This error occurs when MySQL's data loading process encounters characters immediately following the `\N` (NULL escape) sequence within a data file. It indicates a malformed data entry where the parser expects `\N` to signify a complete NULL value, but finds additional, unexpected data. This typically happens during `LOAD DATA INFILE` operations.
Error Message
Unexpected characters after NULL escape (\N) found at row %ld in file '%s'.
Known Causes
3 known causesIncorrect Field/Line Terminator
The specified field or line terminator in the `LOAD DATA INFILE` statement does not accurately match the actual data file structure, causing characters from subsequent fields to be misinterpreted as part of the NULL value.
Malformed Data Entry
The data file itself contains literal characters immediately following the `\N` sequence where a NULL value is expected, often due to manual editing, incorrect data generation, or data corruption.
Encoding Mismatch
An inconsistency in character encoding between the data file and the MySQL server or connection can lead to misinterpretation of special sequences like `\N` and surrounding characters.
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