Error
Error Code:
HV021
PostgreSQL Error HV021: FDW Descriptor Mismatch
Description
Error HV021 indicates an inconsistency in descriptor information within a Foreign Data Wrapper (FDW) operation. This typically occurs when there's a mismatch in schema, column types, or other metadata between the local PostgreSQL server and the remote data source accessed through the FDW.
Error Message
fdw inconsistent descriptor information
Known Causes
4 known causesRemote Schema Mismatch
The schema (table structure, column names, data types) of the remote table does not match the definition expected by the local FDW.
Incompatible Data Types
A column's data type on the remote server is incompatible with its corresponding type defined in the local FDW foreign table.
Incorrect FDW Configuration
The FDW server or user mapping configuration contains errors that lead to misinterpretation of remote data structures.
External System Changes
The remote data source (e.g., another database, CSV file structure) was altered without updating the corresponding FDW definition in PostgreSQL.
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