Oracle 12c pdb自動啟動

DB Pluggable Database是12c中扛鼎的一個新特性， 但是對於CDB中的PDB，默認啟動CDB時不會將所有的PDB帶起來，這樣我們就需要手動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

可以通過添加Trigger的形式來客制化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用戶創建如下觸發器即可：

conn / as sysdba

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