Error
Error Code:
HV008
PostgreSQL Error HV008: FDW Invalid Column
Description
Error HV008, 'fdw invalid column number', indicates a mismatch in column definitions when accessing a remote table via a Foreign Data Wrapper (FDW). This typically occurs when the column structure of the foreign table defined in PostgreSQL does not align with the actual schema of the remote table.
Error Message
fdw invalid column number
Known Causes
3 known causesSchema Mismatch
The column definitions (names, types, or order) of the foreign table in PostgreSQL do not match the actual schema of the remote table on the foreign server.
Remote Table Changes
The schema of the remote table was altered (e.g., column added, removed, or reordered) after the foreign table was defined in PostgreSQL, leading to desynchronization.
Incorrect Column Mapping
When defining or importing the foreign table, an incorrect mapping or selection of columns was specified, causing PostgreSQL to expect a different column structure.
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