- 20 Jun, 2021
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Unplug and Plug Pluggable Database
Unplug and Plug Pluggable Database
We can unplug the pluggable database from existing CDB and Plug it in a different CDB or in the same CDB, depending upon the required. While plugging you can keep the pdb name same as before or can give a different name.
DEMO:
Here we will unplug PDBCD2 pdb and then plug it into the same CDB with different name PDBCD3
Connect to the pluggable database PDBCD2 and close it.
SQL> show pdbs; CON_ID CON_NAME OPEN MODE RESTRICTED ---------- ------------------------------ ---------- ---------- 2 PDB$SEED READ ONLY NO 3 PDBCDB READ WRITE NO 4 PDBCDB2 READ WRITE NO SQL> SQL> alter session set container=PDBCDB2; Session altered. SQL> select file_name from dba_data_files; FILE_NAME -------------------------------------------------------------------------------- /data/app/oracle/oradata/CDB/pdbcdb2/system01.dbf /data/app/oracle/oradata/CDB/pdbcdb2/sysaux01.dbf /data/app/oracle/oradata/CDB/pdbcdb2/undotbs01.dbf /data/app/oracle/oradata/CDB/pdbcdb2/users01.dbf /data/app/oracle/oradata/CDB/pdbcdb2/users02.dbf /data/app/oracle/oradata/CDB/pdbcdb2/tbs_perm_pdb.dat /data/app/oracle/oradata/CDB/pdbcdb2/bigtbs01.dbf SQL> shutdown immediate; Pluggable Database closed.
Connect to container and unplug pdb to a xml file.
[oracle@localhost orcl_plug]$ sqlplus sys/oracle@prim as sysdba SQL*Plus: Release 19.0.0.0.0 - Production on Sun Jun 20 19:44:31 2021 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle. All rights reserved. Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.3.0.0.0 SQL> alter pluggable database PDBCD2 unplug into '/data/orcl_plug.xml'; Pluggable database altered. SQL> select pdb_name, status from dba_pdbs; PDB_NAME STATUS ------------------------------ ---------- PDBCDB NORMAL PDB$SEED NORMAL PDBCDB2 UNPLUGGED
Now drop the pluggable database
SQL> drop pluggable database PDBCDB2; Pluggable database dropped.
PLUGGING:
Here plug the pdb PDBCDB2 to the Same Container Database
Connect to root container in target database and create pluggable:
[oracle@localhost orcl_plug]$ sqlplus sys/oracle@prim as sysdba
SQL*Plus: Release 19.0.0.0.0 - Production on Sun Jun 20 19:44:31 2021
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle. All rights reserved.
Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0
SQL> create pluggable database PDBCDB3 using '/data/orcl_plug.xml' FILE_NAME_CONVERT=('/data/app/oracle/oradata/CDB/PDBCDB2','/data/app/oracle/oradata/CDB/pdbcdb3');
Pluggable database created.
Open the PDB:
SQL> alter pluggable database PDBCDB3 open; Pluggable database altered. SQL> select name, open_mode, total_size from v$pdbs; NAME OPEN_MODE TOTAL_SIZE ------------------------------ ---------- ---------- PDB$SEED READ ONLY 771751936 PDBCDB READ WRITE 978321408 PDBCDB3 READ WRITE 978321408
Plugged the PDB to Different Container
Above steps will be same till unplug the pluggable database
Drop the PDB pdb_db2 by preserving the datafiles
SQL> drop pluggable database pdb_db2 keep datafiles; Pluggable database dropped. SQL> select name, open_mode from v$pdbs; NAME OPEN_MODE --------------- ---------- PDB$SEED READ ONLY PDB1 READ WRITE PDB2 READ WRITE PDB3 READ WRITE PDB_DB2_NEW READ WRITE
Run DBMS_PDB.CHECK_PLUG_COMPATIBILITY Function to check compatibility
SET SERVEROUTPUT ON DECLARE compatible CONSTANT VARCHAR2(3) := CASE DBMS_PDB.CHECK_PLUG_COMPATIBILITY( pdb_descr_file => '/u01/pdb_clone/pdb_db2.xml', pdb_name => 'pdb_db2') WHEN TRUE THEN 'YES' ELSE 'NO' END; BEGIN DBMS_OUTPUT.PUT_LINE(compatible); END; / PL/SQL procedure successfully completed. YES
Create pluggable database with nocopy option
SQL> create pluggable database pdb_db2 using '/u01/pdb_clone/pdb_db2.xml' NOCOPY TEMPFILE REUSE; Pluggable database created.