Pluggable Database Tutorial (12c) Part 2

Posted on by Osama Mustafa in Database
In my Part 1 Tutorial for how to deal with Pluggable database 12c I mentioned how to use pluggable database , How to create pluggable database , how to create tablespace , and how to open/close pluggable database .

Please check the Part ( 1 ) before continue reading this article here.

Welcome to Pluggable database Part 2 

  • Rename Pluggable Database 
  • Manage Pluggable database
  • Drop Pluggable database
  • Security In Pluggable database


SQL> select name, con_id from v$active_services order by 1;

NAME     CON_ID
—————————– ———-
TEST  3

as you see in the above query, I already created pluggable database called test. and it’s in Read write Mode.
Rename Pluggable database 

SQL> alter pluggable database TEST close immediate ;Pluggable database altered.

SQL> alter pluggable database TEST open restricted ;Pluggable database altered.

SQL> select name, open_mode from v$pdbs;

NAME                OPEN_MODE
—————————— ———-
TEST       READ WRITE

SQL> alter pluggable database TEST rename global_name to new ;Pluggable database altered.

SQL> select name, con_id from v$active_services order by 1;

NAME      CON_ID
————————————— ———-
new   3

if you are not connected to pluggable database or set session container then you will recicve error message  

ORA-65046: operation not allowed from outside a pluggable 

SQL> alter pluggable database new close immediate ;Pluggable database altered.

SQL> alter pluggable database new open ;Pluggable database altered.

Manage Pluggable Database

Back to root container using / as sysdba like below :

SQL> conn / as sysdba
Connected.

SQL> select name, con_id from v$active_services order by 1;NAME     CON_ID
————————————————— ———-
SYS$BACKGROUND   1
SYS$USERS  1
db12c  1
db12cXDB  1
new           3

We Control which list for for tablespace & datafiles by using con_id.

  • List tablespace in root container 

SQL> select tablespace_name, con_id from cdb_tablespaces where con_id=1; 

TABLESPACE_NAME       CON_ID
—————————— ———-
SYSTEM 1
SYSAUX 1
UNDOTBS1 1
TEMP 1
USERS 1
CDATA 1

  • List Database In root Container 

 SQL> select file_name, con_id from cdb_data_files where con_id=1;

FILE_NAME CON_ID
————————————————————————— ———-
/u01/app/oracle/oradata/db12c/users01.dbf      1
/u01/app/oracle/oradata/db12c/undotbs01.dbf      1
/u01/app/oracle/oradata/db12c/sysaux01.dbf      1
/u01/app/oracle/oradata/db12c/system01.dbf      1
/u01/app/oracle/oradata/db12c/gls/test.dbf      1

  • Temp Tablespace  in root container 

SQL> select file_name, con_id from cdb_temp_files where con_id=1; 

FILE_NAME CON_ID
—————————————————————————– ———-
/u01/app/oracle/oradata/db12c/temp01.dbf      1

  • Create Tablespace  ( already mentioned in Part (1)) 

SQL> create tablespace test datafile ‘/u01/app/oracle/oradata/db12c/gls/test03.dbf’ size 20M; Tablespace created.

SQL> select tablespace_name, con_id from cdb_tablespaces order by con_id;

TABLESPACE_NAME   CON_ID
—————————— ———-
SYSTEM 1
TEST 1
CDATA 1
SYSAUX 1
TEMP 1
UNDOTBS1 1
USERS 1
SYSAUX 2
TEMP 2
SYSTEM 2
TEMP 3
SYSAUX 3
PDB_TEST 3
SYSTEM 3
14 rows selected.

  •  Create temp tablespace 

SQL> create temporary tablespace temp_test tempfile ‘/u01/app/oracle/oradata/db12c/gls/temp_test.dbf’ size 20M ;
Tablespace created.

SQL> select file_name, con_id from cdb_temp_files where con_id=1;

FILE_NAME CON_ID
————————————————————————— ———-
/u01/app/oracle/oradata/db12c/temp01.dbf      1
/u01/app/oracle/oradata/db12c/gls/temp_test.dbf      1

The Same Steps in root container for create tablespace and temp tablespace for pluggable database.
Security In Pluggable Database

In This Section we will discuss how to manage Users, roles and privileges.
before Demonstration you need to know what is the difference between two users  type :
  • Common  : when you create this kind of users in root it’s automatically replicated in all Pluggable database.
  • Local : this kind of users only created on pluggable database that you are connected to it now. and dose not effect on others pluggable database.
To Create Common Users you need to be connected to root container.

SQL> conn / as sysdba
Connected.

SQL> create user c##osama identified by osama ;User created.

SQL> select username, common, con_id from cdb_users where username like ‘C##%’;

USERNAME COM CON_ID
———————————— — ———-
C##TEST YES      1
C##OSAMA YES      1
C##TEST YES      3
C##OSAMA YES      3

SQL> grant create session to c##osama ;Grant succeeded.

SQL> conn c##osama/osama@test12c:1521/db12c ;
Connected.

Let’s connect to pluggable database :

The user i will created it here will not appear in root container.

SQL> conn sys/sys@test12c:1521/new as sysdba
Connected.

SQL> create user test identified by test ;User created.

SQL> grant create session to test ;Grant succeeded.

 SQL> select username, common, con_id  from cdb_users where username =’TEST’;

USERNAME      COM CON_ID
—————— ———-
TEST  NO      3

 SQL> conn test/test@test12c:1521/new ;
Connected.

 Same rules and conditions applied on Roles if you created in Root Container it will be replicated to pluggable database, on other hand if you created in Pluggable database it will be local without effecting Container.

Let’s connect to Root Container

SQL> conn / as sysdba
Connected.

SQL> create role c##root_role ;Role created.

SQL> select role, common, con_id from cdb_roles where role=’C##ROOT_ROLE’;

ROLE  COM CON_ID
——————— — ———-
C##ROOT_ROLE  YES      1
C##ROOT_ROLE  YES      3

SQL> conn sys/sys@test12c:1521/new as sysdba
Connected.

SQL> create role test2;Role created.

 SQL> select role, common, con_id from cdb_roles where role=’TEST2′;

ROLE COM CON_ID
—————- — ———-
TEST2 NO      3

SQL> create role hr container=all ;
create role hr container=all
*
ERROR at line 1:
ORA-65050: Common DDLs only allowed in CDB$ROOT

SQL> create user hr identified by hr container=all ;
create user hr identified by hr container=all
                             *
ERROR at line 1:
ORA-65050: Common DDLs only allowed in CDB$ROOT

—> you cannot create a common role inside a PDB.
Check user privileges :

SQL> select grantee, privilege, common, con_id from cdb_sys_privs
where privilege=’CREATE SESSION’ and grantee=’TEST’; 

GRANTEE PRIVILEGE  COM  CON_ID
————– —————————————
TEST CREATE SESSION  NO       3

Drop Pluggable Database

SQL > drop pluggable database new  including datafiles;
Pluugable database dropped.

This document also available on slidshare here

Thank you
Osama mustafa 

Published by Osama Mustafa

Osama considered as one of the leaders in Cloud technology, DevOps and database in the Middle-East. I have more than ten years of experience within the industry. moreover, certfied 4x AWS , 4x Azure and 6x OCI, have also obtained database certifications for multiple providers. In addition to having experience with Oracle database and Oracle products, such as middle-ware, OID, OAM and OIM, I have gained substantial knowledge with different databases. Currently, I am architecting and implementing Cloud and DevOps. On top of that, I'm providing solutions for companies that allow them to implement the solutions and to follow the best practices.

7 thoughts on “Pluggable Database Tutorial (12c) Part 2”

  1. Nice, I would like to add below for Pluggable database and common users for the readers:1. trigger to automatically opens all PDBs after startup root container database—————————————create or replace trigger Sys.After_Startup after startup on database begin execute immediate 'alter pluggable database all open'; end After_Startup;/2. Common user name format restriction—————————————Common user must start with c## and automatically replicated in each PDB except the seed PDB. Common users can connect to any PDB. ThanksMonowar

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