【跟我学oracle18c】第十八天：Multitenant Architecture：2.3 Application root,pdb,Container Maps专项测试（对应实例实践）

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             映射表指定元数据链接的公共表中的一列，并使用分区将不同的应用程序PDBs与不同的列值关联起来。通过这种方式，当数据没有在表级别物理分区时，容器映射支持在PDB级别分区数据。

            下面进行一下实践活动，昨天匆匆测试，发现oracle18c的online doc中好多用到的用户、表等都是不存在的，得自己尝试的创建后，测能测试通过，但是这样会有个问题，万一某些小细节与oracle18c的官方测试环境不一致，结果就肯能出现差异，本文就出现差异了，大家实践后帮忙分析回复（大家看到的加个关注吧，我也好回访你们的csdn主页，互相学习），

实例：

--删除之前的实验application container saas_sales_ac

DROP PLUGGABLE DATABASE saas_sales_ac  INCLUDING DATAFILES;

-- Create the application container called saas_sales_ac

-- Create the application container called saas_sales_ac
CREATE PLUGGABLE DATABASE saas_sales_ac AS APPLICATION CONTAINER
  ADMIN USER saas_sales_ac_adm IDENTIFIED BY manager; 

-- Open the application root
ALTER PLUGGABLE DATABASE saas_sales_ac OPEN;


ALTER SESSION SET CONTAINER = saas_sales_ac;

--Create the application  pdbs   并打开

SQL> CREATE PLUGGABLE DATABASE amer_pdb ADMIN USER amer_pdbadm IDENTIFIED BY amer_pdbadm;
Done

SQL> CREATE PLUGGABLE DATABASE euro_pdb ADMIN USER euro_pdbadm IDENTIFIED BY euro_pdbadm;
Done

SQL>  CREATE PLUGGABLE DATABASE asia_pdb ADMIN USER asia_pdbadm IDENTIFIED BY asia_pdbadm;
Done
SQL> alter pluggable database amer_pdb open;

插接式数据库已变更。

SQL> alter pluggable database euro_pdb open;

插接式数据库已变更。

SQL> alter pluggable database asia_pdb open;

-----Example 2-16 Creating a Metadata-Linked Table, Map Table, and Container Map: Part 1

ALTER PLUGGABLE DATABASE APPLICATION saas_sales_app BEGIN INSTALL '1.0';

CREATE USER saas_sales_adm IDENTIFIED BY manager CONTAINER=ALL;

 GRANT CREATE SESSION, DBA TO saas_sales_adm;

 CREATE USER oe IDENTIFIED BY manager CONTAINER=ALL;

GRANT CREATE SESSION, DBA TO oe;

CREATE TABLE oe.countries_mlt SHARING=METADATA (
      region    VARCHAR2(30),
      cname     VARCHAR2(30));

SQL> CREATE TABLE saas_sales_adm.pdb_map_tbl (cname VARCHAR2(30) NOT NULL)
  2    PARTITION BY LIST (cname) (
  3      PARTITION amer_pdb VALUES ('US','MEXICO','CANADA'),
  4      PARTITION euro_pdb VALUES ('UK','FRANCE','GERMANY'),
  5      PARTITION asia_pdb VALUES ('INDIA','CHINA','JAPAN'));
Table created

ALTER PLUGGABLE DATABASE SET CONTAINER_MAP='saas_sales_adm.pdb_map_tbl';

SQL> ALTER TABLE oe.countries_mlt ENABLE CONTAINER_MAP;
Table altered

SQL> ALTER TABLE oe.countries_mlt ENABLE CONTAINERS_DEFAULT;
Table altered

SQL> ALTER PLUGGABLE DATABASE APPLICATION saas_sales_app END INSTALL '1.0';
Done

---Example 2-17 Synchronizing the Application, and Adding Data: Part 2

SQL> ALTER SESSION SET CONTAINER=amer_pdb;
Session altered

SQL> ALTER PLUGGABLE DATABASE APPLICATION saas_sales_app SYNC;
Done

SQL> 
SQL> INSERT INTO oe.countries_mlt VALUES ('AMER','US');
1 row inserted
SQL> INSERT INTO oe.countries_mlt VALUES ('AMER','MEXICO');
1 row inserted
SQL> INSERT INTO oe.countries_mlt VALUES ('AMER','CANADA');
1 row inserted
SQL> COMMIT;
Commit complete

SQL> 
SQL> ALTER SESSION SET CONTAINER=euro_pdb;
Session altered
SQL> ALTER PLUGGABLE DATABASE APPLICATION saas_sales_app SYNC;
Done
SQL> INSERT INTO oe.countries_mlt VALUES ('EURO','UK');
1 row inserted
SQL> INSERT INTO oe.countries_mlt VALUES ('EURO','FRANCE');
1 row inserted
SQL> INSERT INTO oe.countries_mlt VALUES ('EURO','GERMANY');
1 row inserted
SQL> COMMIT;
Commit complete

SQL> 
SQL> ALTER SESSION SET CONTAINER=asia_pdb;
Session altered
SQL> ALTER PLUGGABLE DATABASE APPLICATION saas_sales_app SYNC;
Done
SQL> INSERT INTO oe.countries_mlt VALUES ('ASIA','INDIA');
1 row inserted
SQL> INSERT INTO oe.countries_mlt VALUES ('ASIA','CHINA');
1 row inserted
SQL> INSERT INTO oe.countries_mlt VALUES ('ASIA','JAPAN');
1 row inserted
SQL> COMMIT;
Commit complete

结果测试

SQL> ALTER SESSION SET CONTAINER=asia_pdb;
Session altered

SQL>  SELECT region FROM oe.countries_mlt;
REGION
------------------------------
ASIA
ASIA
ASIA

SQL> ALTER SESSION SET CONTAINER=euro_pdb;
Session altered

SQL>  SELECT region FROM oe.countries_mlt;
REGION
------------------------------
EURO
EURO
EURO

SQL> ALTER SESSION SET CONTAINER=saas_sales_ac;
Session altered

SQL> SELECT region FROM oe.countries_mlt;
REGION
------------------------------

SQL> SELECT region FROM oe.countries_mlt WHERE cname='MEXICO';
REGION
------------------------------

SQL> SELECT region FROM containers(oe.countries_mlt);
REGION
------------------------------

发现有问题：

1、application root中查询怎么是空记录，与文章预期不符。

大家帮忙分析一下，你们有出来结果的本文回复一下，谢谢

一些错误代码的分析：

1、ALTER PLUGGABLE DATABASE SET CONTAINER_MAP='saas_sales_adm.pdb_map_tbl'
ORA-65291: 无效的容器映射对象

原因：你没创建application pdbs造成的，因为map内部的pdbs不存在，所以肯定是无效的

2、CREATE TABLE appadm.countries_mlt SHARING=METADATA (
  region    VARCHAR2(30),
  cname     VARCHAR2(30))
ORA-65293: 隐式用户不能拥有公用对象。

分析：appadm是在application root下创建的common用户，在

ALTER PLUGGABLE DATABASE APPLICATION saas_sales_app BEGIN INSTALL '1.0';

内部创建application  user就可以了

3、CREATE TABLE appadm.countries_mlt SHARING=METADATA (
  region    VARCHAR2(30),
  cname     VARCHAR2(30))
ORA-65021: SHARING 子句的使用非法

分析：

在ALTER PLUGGABLE DATABASE APPLICATION saas_sales_app BEGIN INSTALL '1.0';内部创建即可

4、CREATE PLUGGABLE DATABASE app01 ADMIN USER appadm IDENTIFIED BY manager
ORA-65001: 缺少管理用户名或管理用户名无效

原因：appadm是已经存在的common用户