Error
Error Code:
HV004
PostgreSQL Error HV004: FDW Invalid Data Type
Description
This error indicates that a Foreign Data Wrapper (FDW) operation encountered a data type mismatch or an invalid data type specification. It typically occurs when PostgreSQL attempts to map data between a foreign server and a local table, but the types are incompatible or incorrectly defined in the FDW configuration.
Error Message
fdw invalid data type
Known Causes
4 known causesData Type Mismatch on Foreign Server
The data type specified for a column in the foreign table definition does not accurately reflect the actual data type of the corresponding column on the remote server.
Incorrect FDW Column Mapping
The `CREATE FOREIGN TABLE` statement or `IMPORT FOREIGN SCHEMA` command incorrectly mapped a remote column to an incompatible local PostgreSQL data type.
Missing or Invalid Type Cast Functions
PostgreSQL requires specific cast functions for data type conversion between the foreign server and the local database, which are either absent or improperly defined.
FDW Driver Limitations
Specific FDW drivers may have limitations or bugs in how they handle certain complex or custom data types, leading to unexpected conversion failures.
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