【12c新特性】12c中如何自動啓動PDB Pluggable Database

PDB Pluggable Database是12c中扛鼎的一個新特性， 可是對於CDB中的PDB，默認啓動CDB時不會將全部的PDB帶起來，這樣咱們就須要手動alter pluggable database ALL OPEN;     例如：

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL>
SQL> startup ;
ORACLE instance started.

Total System Global Area 1419685888 bytes
Fixed Size                  2288344 bytes
Variable Size             536872232 bytes
Database Buffers          872415232 bytes
Redo Buffers                8110080 bytes
Database mounted.
Database opened.
SQL> select con_id,name,open_mode from v$pdbs;

    CON_ID NAME                           OPEN_MODE
---------- ------------------------------ ----------
         2 PDB$SEED                       READ ONLY
         3 MACC                           MOUNTED

      能夠經過添加Trigger的形式來客製化startup時自動將PDB OPEN:    

CREATE TRIGGER open_all_pdbs
   AFTER STARTUP
   ON DATABASE
BEGIN
   EXECUTE IMMEDIATE 'alter pluggable database all open';
END open_all_pdbs;
/

Trigger created.

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL>
SQL> startup;
ORACLE instance started.

Total System Global Area 1419685888 bytes
Fixed Size                  2288344 bytes
Variable Size             536872232 bytes
Database Buffers          872415232 bytes
Redo Buffers                8110080 bytes
Database mounted.
Database opened.
SQL> select con_id,name,open_mode from v$pdbs;

    CON_ID NAME                           OPEN_MODE
---------- ------------------------------ ----------
         2 PDB$SEED                       READ ONLY
         3 MACC                           READ WRITE

NOTE: dependency between database MAC and diskgroup resource ora.DATADG.dg is established
alter pluggable database all open
Sun Jul 07 01:40:59 2013
This instance was first to open pluggable database MACC (container=3)
Opening pdb MACC (3) with no Resource Manager plan active
Pluggable database MACC opened read write
Completed: alter pluggable database all open
Starting background process CJQ0

    使用SYS用戶建立以下觸發器便可：    

conn / as sysdba

CREATE TRIGGER open_all_pdbs
   AFTER STARTUP
   ON DATABASE
BEGIN
   EXECUTE IMMEDIATE 'alter pluggable database all open';
END open_all_pdbs;
/