How to Remove PDB From Restricted Mode

1) Check PDB  status.

SQL> select INST_ID,NAME,OPEN_MODE,RESTRICTED 
     from gv$pdbs order by 1,2;

INST_ID   NAME        OPEN_MODE  RES
-------- ------------ ---------- ---
 1       RACTESTPDB   READ WRITE YES
 1       PDB$SEED     READ ONLY  NO
 2       RACTESTPDB   READ WRITE YES
 2       PDB$SEED     READ ONLY  NO

2) Check PDB_PLUG_IN_VIOLATIONS.

SQL> select status, message, action 
     from   pdb_plug_in_violations 
     where  status !='RESOLVED';

STATUS      MESSAGE       ACTION
---------   ------------ ------------
PNDING     PSU bundle    Call datapatch.
           patch 180116 
           (DATABASE PATCH
           SET UPDATE
           12.1.0.2.180116):
           Installed in the 
           CDB but not in 
           the PDB.
PENDING     ...
            ..
            .

3) Rerun “datapatch” as per “run datapatch”.

4)Bounce all instances and pdbs.

$srvctl stop database -d RACTEST;

$srvctl start database -d RACTEST;

SQL> alter pluggable database RACTESTPDB open instances=all;

Pluggable database altered.

SQL> select INST_ID,NAME,OPEN_MODE,RESTRICTED 
     from gv$pdbs order by 1,2;

INST_ID  NAME         OPEN_MODE  RES
-------- ------------ ---------- ---
 1       RACTESTPDB   READ WRITE NO
 1       PDB$SEED     READ ONLY  NO
 2       RACTESTPDB   READ WRITE NO
 2       PDB$SEED     READ ONLY  NO

SQL> alter pluggable database RACTESTPDB save state;

Pluggable database altered.