Error
Error Code:
HV090
PostgreSQL Error HV090: FDW Invalid String Length
Description
This error indicates a problem with the Foreign Data Wrapper (FDW) when handling string or buffer lengths during data retrieval or insertion. It typically occurs when there's a mismatch between the expected and actual data sizes from a foreign server.
Error Message
fdw invalid string length or buffer length
Known Causes
4 known causesData Type Mismatch
The data type or declared length for a column in the foreign table definition within PostgreSQL does not accurately match the actual data type or size on the foreign server.
Incorrect FDW Options
Misconfiguration of FDW options, such as explicit column lengths or encoding settings, leading the FDW to miscalculate buffer requirements.
Foreign Server Data Issue
The foreign server is returning data that exceeds the expected length, or there's an issue on the foreign server's side with how it provides string lengths.
Character Encoding Discrepancy
Inconsistent character encoding between the PostgreSQL server, the FDW, and the foreign data source can lead to incorrect string length calculations for multi-byte 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