Create a Pluggable Database (PDB) Manually

Create a Pluggable Database (PDB) Manually

To create a new pluggable database from the seed database, all we have to do is tell Oracle where the file should be placed. We can do this using one of two methods. The first method uses theFILE_NAME_CONVERT clause in the CREATE PLUGGABLE DATABASE statement.

CONN / AS SYSDBA

CREATE PLUGGABLE DATABASE pdb2 ADMIN USER pdb_adm IDENTIFIED BY Password1

  FILE_NAME_CONVERT=('/u01/app/oracle/oradata/cdb1/pdbseed/','/u01/app/oracle/oradata/cdb1/pdb2/');

Alternatively, we can specify the PDB_FILE_NAME_CONVERT initialization parameter before calling the command without using the FILE_NAME_CONVERT clause.

CONN / AS SYSDBA

ALTER SESSION SET PDB_FILE_NAME_CONVERT='/u01/app/oracle/oradata/cdb1/pdbseed/','/u01/app/oracle/oradata/cdb1/pdb3/';

CREATE PLUGGABLE DATABASE pdb3 ADMIN USER pdb_adm IDENTIFIED BY Password1;

Every time there is a need to convert file locations, either of these two methods will work. For the remainder of the article I will stick to using the FILE_NAME_CONVERT method to cut down on the variations I have to display.

We can see the PDBs are present by querying the DBA_PDBS and V$PDBS views.

COLUMN pdb_name FORMAT A20

SELECT pdb_name, status

FROM   dba_pdbs

ORDER BY pdb_name;

PDB_NAME            STATUS

-------------------- -------------

PDB$SEED            NORMAL

PDB1                NORMAL

PDB2                NEW

PDB3                NEW

SQL>

SELECT name, open_mode

FROM   v$pdbs

ORDER BY name;

NAME                          OPEN_MODE

------------------------------ ----------

PDB$SEED                      READ ONLY

PDB1                          MOUNTED

PDB2                          MOUNTED

PDB3                          MOUNTED

SQL>

The PDBs are created with the status of 'NEW'. They must be opened in READ WRITE mode at least once for the integration of the PDB into the CDB to be complete.

ALTER PLUGGABLE DATABASE pdb2 OPEN READ WRITE;

ALTER PLUGGABLE DATABASE pdb3 OPEN READ WRITE;

SELECT pdb_name, status

FROM   dba_pdbs

ORDER BY pdb_name;

PDB_NAME            STATUS

-------------------- -------------

PDB$SEED            NORMAL

PDB1                NORMAL

PDB2                NORMAL

PDB3                NORMAL

SQL>

SELECT name, open_mode

FROM   v$pdbs

ORDER BY name;

NAME                          OPEN_MODE

------------------------------ ----------

PDB$SEED                      READ ONLY

PDB1                          MOUNTED

PDB2                          READ WRITE

PDB3                          READ WRITE

SQL>

Note. Depending on the syntax used, you may need to grant the PDB_DBA role to the local admin users for the PDB.

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