Oracle12c_PDB的拔插与删除

这里简单介绍了拔出PDB,删除PDB,插入PDB的操作方法:

1、unplug PDB

查看PDB信息:

SQL> select name,open_mode from v$pdbs;

NAME                           OPEN_MODE
------------------------------ ----------
PDB$SEED                       READ ONLY
PDB_1                          READ WRITE
PDB_2                          READ WRITE
PDB_3                          READ WRITE
PDB_4                          READ WRITE

SQL> show con_name;

CON_NAME
------------------------------
CDB$ROOT

拔出PDB_4(必须连接到CDB$ROOT):

首先关闭PDB_4

SQL> alter pluggable database pdb_4 close immediate;

Pluggable database altered.

然后就可以unplug

SQL>  alter pluggable database pdb_4 unplug into '/home/oracle/unplugged_pdbs/pdb_4.xml';

Pluggable database altered.

XML文件中包含了每个数据文件的位置,以及初始化参数等信息。

2、drop PDB

关闭并且拔出PDB后才可以进行删除,删除时可以一起删除数据文件:

同样需要连接到CDB$ROOT容器,执行下列语句:

SQL> drop pluggable database pdb_4 keep datafiles;  

Pluggable database dropped.

SQL> select name,open_mode from v$pdbs;

NAME                           OPEN_MODE
------------------------------ ----------
PDB$SEED                       READ ONLY
PDB_1                          READ WRITE
PDB_2                          READ WRITE
PDB_3                          READ WRITE

这里使用了keep datafiles保留了PDB_4的数据文件。另外,也可以使用inluding datafiles彻底删除PDB的数据文件。

3、plug an unplugged PDB

plug PDB_4:

SQL> create pluggable database pdb_4_replug using '/home/oracle/unplugged_pdbs/pdb_4.xml' nocopy tempfile reuse;

Pluggable database created.

SQL> select name from v$pdbs;

NAME
------------------------------
PDB$SEED
PDB_1
PDB_2
PDB_3
PDB_4_REPLUG

SQL> select name,open_mode from v$pdbs;

NAME                           OPEN_MODE
------------------------------ ----------
PDB$SEED                       READ ONLY
PDB_1                          READ WRITE
PDB_2                          READ WRITE
PDB_3                          READ WRITE
PDB_4_REPLUG                   MOUNTED

上述create pluggable database语句中,因为数据文件都在xml文件指定的位置,且仍使用原来的位置作为新

的pdb的数据文件的存储位置,因此没有包含其他子句。

另外一条plug PDB的语句也可能如下:

CREATE PLUGGABLE DATABASE pdbname
USING '/location/filename.xml'
SOURCE_FILE_NAME_CONVERT=('/location1/','/location2/')
MOVE
FILE_NAME_CONVERT=('/location2/','/location3/')
PATH_PREFIX='/location3/'
STORAGE (MAXSIZE 2G MAX_SHARED_TEMP_SIZE 100M);

这里xml文件中指示数据文件在/location1/中,而实际上数据文件在/location2/中,且最终我们要将数据文件

放在/location3/中
新闻名称:Oracle12c_PDB的拔插与删除
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