Error
Error Code:
ORA-29657
Oracle ORA-29657: Duplicate External Name
Description
The ORA-29657 error occurs in Oracle Database when defining subtypes with external names. This error indicates that the specified EXTERNAL NAME clause in a subtype is already in use by another type within the supertype hierarchy.
Error Message
ORA-29657: class defined in EXTERNAL NAME clause is used in another subtype
Known Causes
3 known causesDuplicate EXTERNAL NAME
The EXTERNAL NAME clause in the subtype definition conflicts with an existing type in the supertype hierarchy using the same external name.
Incorrect Inheritance
The subtype inherits from a supertype where an external name is already defined, leading to a naming conflict.
Schema Corruption
In rare cases, schema corruption can cause metadata inconsistencies, leading to this error.
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