Error
Error Code:
ORA-30037
Oracle Error ORA-30037: Parallel DML Conflict
Description
This error occurs in Oracle Database when attempting to perform parallel DML on an object after a previous DML operation has already been performed on the same object within the same transaction. Oracle restricts parallel DML operations on objects after other DML operations in the same transaction.
Error Message
ORA-30037: Cannot perform parallel DML after a prior DML on the object
Known Causes
3 known causesMixed DML Operations
A standard DML statement (e.g., INSERT, UPDATE, DELETE) was executed on a table, followed by an attempt to use a parallel DML statement on the same table within the same transaction.
Transaction Isolation
The current transaction's isolation level prevents parallel DML after a prior DML operation. This is due to the way Oracle manages concurrent access and data consistency.
Lack of Bitmap Segments
The database may not be configured to use bitmap segments, which can allow for multiple parallel DML operations on the same object.
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