数据泵：19c PDB数据泵迁入

1.问题描述

用数据泵进行pdb的迁入迁出，模拟测试将其他库的数据导入到19cpdb中

2.环境介绍

source：12.2.0.1.0

target：19.0.0.0.0

3.源端制造数据

创建表空间

create tablespace ODPS 
logging datafile '/u01/app/oracle/oradata/PROD/ODPS.dbf' 
size 500m autoextend on 
next 50m maxsize 20480m extent management local; 

创建用户

create user global identified by global 
default tablespace ODPS
temporary tablespace temp profile default;

授权用户

grant connect,resource to global;
grant dba to global;

建表

conn global/global

create table DXP_QGM_TEST_THREE
(
ID NUMBER(4) PRIMARY KEY,
DOM_DATETIME VARCHAR(255),
DOM_ID NUMBER(10),DOM_STRING VARCHAR2(255)
);

insert into DXP_QGM_TEST_THREE (ID, DOM_DATETIME,DOM_ID,DOM_STRING) select rownum as ID,to_char(sysdate + rownum / 24 / 3600, 'yyyy-mm-dd hh24:mi:ss') as DOM_DATETIME,
trunc(dbms_random.value(0, 100)) as DOM_ID, dbms_random.string('x', 20) DOM_STRING from dual connect by level <= 1000;

4.导出数据

SYS@PROD> select * from directories;
DATA_PUMP_DIR：/u01/app/oracle/admin/PROD/dpdump/

expdp "'sys/oracle as sysdba'" schemas=global dumpfile=global20210528.dmp DIRECTORY=DATA_PUMP_DIR logfile=global20210528.log  compression=all parallel=4;

5.target创建pdb

SQL> !mkdir -p $ORACLE_BASE/oradata/CDB2/pdb4

SQL> create pluggable database pdb4 admin user pdbadmin identified by Welcome1 roles =(connect) 
create_file_dest='/u01/app/oracle/oradata/CDB2/pdb4';  2  

Pluggable database created.

SQL> show pdbs

    CON_ID CON_NAME              OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
     2 PDB$SEED              READ ONLY  NO
     3 PDB1               MOUNTED
     4 PDB2               MOUNTED
     5 PDB3               MOUNTED
     6 PDB4               MOUNTED
SQL> alter pluggable database pdb4 open;

Pluggable database altered.

SQL> show pdbs

    CON_ID CON_NAME              OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
     2 PDB$SEED              READ ONLY  NO
     3 PDB1               MOUNTED
     4 PDB2               MOUNTED
     5 PDB3               MOUNTED
     6 PDB4               READ WRITE NO

配置tnsname.ora,添加pdb4的tns解析字符串

[oracle@rac1 ~]$ vim $ORACLE_HOME/network/admin/tnsnames.ora

PDB4 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = rac1)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = PDB4)
)
)

确保能够被解析

[oracle@rac1 ~]$ tnsping pdb4

TNS Ping Utility for Linux: Version 19.0.0.0.0 - Production on 29-MAY-2021 09:14:02

Copyright (c) 1997, 2019, Oracle. All rights reserved.

Used parameter files:

Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = rac1)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = PDB4)))
OK (0 msec)

6.恢复dump文件

切换为pdb4

SQL> alter session set container=pdb4;

Session altered.

查询数据字典

select * from dba_directories;

DATA_PUMP_DIR
/u01/app/oracle/admin/cdb2/dpdump/C36EAB45FFE40BA4E0530BA3A8C0F174

创建表空间

create tablespace pdb4_odps
datafile '/u01/app/oracle/oradata/CDB2/pdb4/CDB2/C36EAB45FFE40BA4E0530BA3A8C0F174/datafile/pdb4_odps.dbf'
size 1024m
autoextend on
next 50m maxsize 20480m
extent management local;

创建用户并指定表空间

create user wangyong identified by wangyong default tablespace pdb4_odps; 

给用户授权

grant connect,resource,dba to wangyong;
grant read,write on directory DATA_PUMP_DIR to wangyong;

将dump文件传输到pdb的DATA_PUMP_DIR目录中

[oracle@enmoedu1 dpdump]$ scp global20210528.* oracle@rac1:/u01/app/oracle/admin/cdb2/dpdump/C36EAB45FFE40BA4E0530BA3A8C0F174
oracle@rac1's password: 
global20210528.dmp                                                               100%  120KB 120.0KB/s   00:00    
global20210528.log                                                               100% 1572     1.5KB/s   00:00 

impdp恢复数据，恢复界面要查看当前的实例名是否是pdb下的cdb

[oracle@rac1 ~]$ echo $ORACLE_SID
test
[oracle@rac1 ~]$ export  ORACLE_SID=cdb2

前面已经加入了pdb4的tns解析，所以在导入的时候@pdb4就可以指定导入所需要的pdb中了

[oracle@rac1 ~]$ impdp "'sys/Welcome1@pdb4 as sysdba'" directory=DATA_PUMP_DIR dumpfile=global20210528.dmp logfile=global20210528.log version='12.2.0.1.0' remap_tablespace=ODPS:pdb4_odps  remap_schema=global:wangyong

Import: Release 19.0.0.0.0 - Production on Sat May 29 09:43:11 2021
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Master table "SYS"."SYS_IMPORT_FULL_01" successfully loaded/unloaded
Starting "SYS"."SYS_IMPORT_FULL_01":  "sys/********@pdb4 AS SYSDBA" directory=DATA_PUMP_DIR dumpfile=global20210528.dmp logfile=global20210528.log version=12.2.0.1.0 remap_tablespace=ODPS:pdb4_odps remap_schema=global:wangyong 
Processing object type SCHEMA_EXPORT/USER
ORA-31684: Object type USER:"WANGYONG" already exists

Processing object type SCHEMA_EXPORT/SYSTEM_GRANT
Processing object type SCHEMA_EXPORT/ROLE_GRANT
Processing object type SCHEMA_EXPORT/DEFAULT_ROLE
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/TABLE/TABLE
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
. . imported "WANGYONG"."DXP_QGM_TEST_THREE"             23.35 KB    1000 rows
. . imported "WANGYONG"."T1"                             4.789 KB       1 rows
Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type SCHEMA_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Processing object type SCHEMA_EXPORT/STATISTICS/MARKER
Job "SYS"."SYS_IMPORT_FULL_01" completed with 1 error(s) at Sat May 29 09:43:28 2021 elapsed 0 00:00:16

7.验证数据

SQL> show con_name

CON_NAME
------------------------------
PDB4
SQL> alter session set container=cdb$root;

Session altered.

SQL> conn wangyong/wangyong@pdb4
Connected.
SQL> desc t1;
 Name                       Null?    Type
 ----------------------------------------- -------- ----------------------------
 ID                            NUMBER(38)
 NAME                            VARCHAR2(39)

SQL> select count(*) from DXP_QGM_TEST_THREE;

  COUNT(*)
----------
      1000