CNDBA社区
1 说明
由于从10g，11g直接升级到12c时候，是无法直接升级到CDB的而是non-CDB,所以要想使用CDB，必须进行转换。Non-CDB本身是无法直接转换成CDB-PDB模式，只能通过迁移的方式将non-cdb迁移到一个已存在的CDB数据库上的PDB中。
2 使用DBMS_PDB包
如果CDB不存在，那么就首先创建CDB
2.1 创建CDB
首先使用dbca或CREATE DATABASE(不建议)创建一个CDB
安装CDB完毕！
2.1.1 查看安装是否正确
[[email protected] ~]$ sqlplus [email protected] as sysdba
SQL*Plus: Release 12.1.0.2.0 Production on Thu Jul 27 22:02:09 2017
Copyright (c) 1982, 2014, Oracle. All rights reserved.
Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 PDB1 READ WRITE NO下图：使用DBMS_PDB.DESCRIBE存储过程插入non-CDB
官方文档：http://docs.oracle.com/database/121/ADMIN/cdb_plug.htm#ADMIN13598
使用DBMS_PDB包是为了将从non-cdb生成XML元数据文件，文件里有详细的步骤：如果拔PDB数据库。将非CDB插入到一个CDB的PDB中。
2.2 以read-only打开non-CDB
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
--以read only重新打开数据库
SQL> startup open read only
ORACLE instance started.
Total System Global Area 624951296 bytes
Fixed Size 2927480 bytes
Variable Size 276825224 bytes
Database Buffers 339738624 bytes
Redo Buffers 5459968 bytes
Database mounted.
Database opened.2.3 运行DBMS_PDB.DESCRIBE生成XML文件
SQL> BEGIN
DBMS_PDB.DESCRIBE(
pdb_descr_file => '/software/cndba.xml');
END;
/ 2 3 4 5
PL/SQL procedure successfully completed.
[[email protected] software]$ ll cndba.xml
-rw-r--r-- 1 oracle oinstall 5668 Jul 27 20:46 cndba.xml
2.4 检查兼容性
使用DBMS_PDB.CHECK_PLUG_COMPATIBILITY函数检查non-CDB和CDB的兼容性
SQL> SET SERVEROUTPUT ON
DECLARE
compatible CONSTANT VARCHAR2(3) :=
CASE DBMS_PDB.CHECK_PLUG_COMPATIBILITY(
pdb_descr_file => '/software/cndba.xml',
pdb_name => 'cndba_pdb')
WHEN TRUE THEN 'YES'
ELSE 'NO'
END;
BEGIN
DBMS_OUTPUT.PUT_LINE(compatible);
END;
/SQL> 2 3 4 5 6 7 8 9 10 11 12
YES
PL/SQL procedure successfully completed.可以看到输出YES,表示相兼容。
2.5
关闭non-CDB数据库
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.2.6 插入non-CDB
SQL> CREATE PLUGGABLE DATABASE cndba_pdb USING '/software/cndba.xml' --上面生成的XML文件
COPY
FILE_NAME_CONVERT = ('/u01/app/oracle/oradata/cndba', '/u01/app/oracle/oradata/cndba_pdb/')
USER_TABLESPACES=('USERS'); 2 3 4
Pluggable database created.USER_TABLESPACES子句使您可以将非cdb中多个租户使用的数据分离为不同的PDBs。
可以使用多个CREATE PLUGGABLE数据库语句与此子句创建其他PDBs，其中包括在非cdb中存在的其他表空间中的数据。
2.7 执行脚本
部分结果
SQL> @?/rdbms/admin/noncdb_to_pdb.sql
SQL> @$ORACLE_HOME/rdbms/admin/noncdb_to_pdb.sql
SQL> SET SERVEROUTPUT ON
SQL> SET FEEDBACK 1
SQL> SET NUMWIDTH 10
SQL> SET LINESIZE 80
SQL> SET TRIMSPOOL ON
SQL> SET TAB OFF
SQL> SET PAGESIZE 100
SQL>
SQL> WHENEVER SQLERROR EXIT;
SQL>
SQL> DOC
DOC>#######################################################################
DOC>#######################################################################
DOC> The following statement will cause an "ORA-01403: no data found"
DOC> error if we're not in a PDB.
DOC> This script is intended to be run right after plugin of a PDB,
DOC> while inside the PDB.
DOC>#######################################################################
DOC>#######################################################################
DOC>#
SQL>
SQL> VARIABLE cdbname VARCHAR2(128)
SQL> VARIABLE pdbname VARCHAR2(128)
SQL> BEGIN
2 SELECT sys_context('USERENV', 'CDB_NAME')
3 INTO :cdbname
4 FROM dual
5 WHERE sys_context('USERENV', 'CDB_NAME') is not null;
6 SELECT sys_context('USERENV', 'CON_NAME')
7 INTO :pdbname
8 FROM dual
9 WHERE sys_context('USERENV', 'CON_NAME') <> 'CDB$ROOT';
10 END;
11 /
PL/SQL procedure successfully completed.
SQL>
SQL> COLUMN pdbname NEW_VALUE pdbname
SQL> COLUMN pdbid NEW_VALUE pdbid
SQL>
SQL> select :pdbname pdbname from dual;
PDBNAME
............
SQL> alter session set container = "&pdbname";
Session altered.
SQL>
SQL> -- leave the PDB in the same state it was when we started
SQL> BEGIN
2 execute immediate '&open_sql &restricted_state';
3 EXCEPTION
4 WHEN OTHERS THEN
5 BEGIN
6 IF (sqlcode <> -900) THEN
7 RAISE;
8 END IF;
9 END;
10 END;
11 /
PL/SQL procedure successfully completed.
SQL>
SQL> WHENEVER SQLERROR CONTINUE;
SQL>2.8 验证
目标库中PDB(cndba_pdb):
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 PDB1 READ WRITE NO
4 CNDBA_PDB MOUNTED
SQL> alter pluggable database cndba_pdb open;
SQL> SHOW PDBS;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 PDB1 READ WRITE NO
4 CNDBA_PDB READ WRITE YES
SQL> alter session set container=cndba_pdb;
Session altered.
SQL> select count(*) from cndba.test;
COUNT(*)
----------
1545源库(non-CDB):
SQL> select count(*) from cndba.test;
COUNT(*)
----------
1545成功将non-CDB迁移到PDB中，可以通过DBCA将non-CDB删掉了。
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non-CDB CDB
