Error
Error Code:
ORA-30353
ORA-30353: Query Rewrite Incompatible
Description
This error occurs when Oracle's query rewrite feature encounters an expression in the SELECT clause of a materialized view that it cannot handle. Query rewrite optimizes queries by using precomputed results from materialized views, but certain expressions prevent this optimization.
Error Message
ORA-30353: expression not supported for query rewrite
Known Causes
4 known causesNon-Deterministic Functions
The SELECT clause contains functions like SYSDATE or CURRENT_TIMESTAMP, which return different values each time they are called, making the materialized view's results unreliable for query rewrite.
Sequence Numbers
Using sequence numbers directly in the SELECT clause is not supported because these values change over time, invalidating the precomputed results.
Bind Variables
The SELECT clause references bind variables, which are placeholders for values that are not known until runtime, making it impossible to precompute the materialized view.
Unsupported Pseudocolumns
The SELECT clause includes pseudocolumns like UID, USER, or ROWNUM, which are context-dependent and not suitable for query rewrite.
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