“Database option mismatch: PDB installed version NULL.” in PDB_PLUG_IN_VIOLATIONS

There are warning messages in PDB_PLUG_IN_VIOLATIONS :

SQL>select NAME,CAUSE,MESSAGE,TYPE,CON_ID 
      from PDB_PLUG_IN_VIOLATIONS;

NAME         CAUSE  MESSAGE                                                                                              
----------  ------- ---------------------------------------------
                                                 TYPE      CON_ID
------------ ---------- -------------------- ------------------
RACTESTPDB   OPTION     Database option DV mismatch: PDB installed version NULL. CDB installed version 12.2.0.1.0.           WARNING    3 
RACTESTPDB   OPTION     Database option OLS mismatch: PDB installed version NULL. CDB installed version 12.2.0.1.0.          WARNING    3
RACTESTPDB   OPTION     Database option SDO mismatch: PDB installed version NULL. CDB installed version 12.2.0.1.0.          WARNING    3
RACTESTPDB   APEX       APEX mismatch: PDB installed version NULL CDB installed version 5.0.4.00.12                          WARNING    3

Check what options installed in CDB ( CDB$ROOT ):

SQL> show con_name

CON_NAME
--------------
CDB$ROOT

SQL> select COMP_NAME from dba_registry;

COMP_NAME
----------------------------------------
Oracle Database Catalog Views
Oracle Database Packages and Types
JServer JAVA Virtual Machine
Oracle XDK
Oracle Database Java Packages
Oracle Real Application Clusters
Oracle XML Database
Oracle Workspace Manager
Oracle Text
Oracle Multimedia
Spatial                    <--- Not in PDB
Oracle Label Security      <--- Not in PDB
Oracle Application Express <--- Not in PDB
Oracle Database Vault      <--- Not in PDB

14 rows selected.

Check what options installed in PDB:

SQL> show con_name

CON_NAME
-----------------
RACTESTPDB

SQL> select COMP_NAME from dba_registry;

COMP_NAME
-------------------------------------
JServer JAVA Virtual Machine
Oracle Database Catalog Views
Oracle Database Java Packages
Oracle Database Packages and Types
Oracle Multimedia
Oracle Real Application Clusters
Oracle Text
Oracle Workspace Manager
Oracle XDK
Oracle XML Database

10 rows selected.

We can see CDB has four more options installed than PDB.

CONCLUSION

It is accepted that CDB not necessarily has same options installed as PDB. But CDB should have same or more options installed than PDB.

So in this situation, the warning messages in PDB_PLUG_IN_VIOLATIONS can be ignored.