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Invalid x_$ Objects After Upgrade (Doc ID 361757.1)

Last updated on JUNE 10, 2019

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 8.1.7 to 18]
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Schema Service - Version N/A and later
Information in this document applies to any platform.


You have successfully completed a database upgrade without any errors, but notice that there are some invalid SYS owned objects that begin with x_$. For example:

Note:  These objects may be named in upper, lower or mixed case and are usually views starting with the x_$

sys x_$bh
sys x_$kcbwbpd
sys x_$kcbwds

If you try to recompile these views manually, you receive a warning similar to the following:

alter view x_$bh compile;
warning : view altered with compilation errors.
- show errors;
No errors.

If you try to recompile other invalid views or procedures, you may get errors like ORA-904 and ORA-907.




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