oracle 使用db_link 导入导出小结
客户有一个需求,是将一个库中的某个用户迁移到一台新的oracle服务器上,因数据量较小,并且不涉及版本的升级,所以可以采用创建一个dblink,然后通过这个dblink直接从源库将用户数据导出并导入到新库中。
为了防止现场发生意外,因此先自己搭建一套环境进行测试,环境如下:
源库:192.168.56.100 Abbott 数据库:orcl 连接名:orcl1 导出用户:test
新库:192.168.56.40 ora-ogg 数据库:orcl 连接名:ogg 创建用户:abbott
实施步骤:
- 配置源库和新库的tnsnames.ora文件,使其可以互连,这里源库和新库的tnsnames.ora文件内容相同;
[oracle@Abbott admin]$ vi tnsnames.ora
# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools. ORCL1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.100)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
) OGG =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.40)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)2. 测试连接,从源库使用abbott用户连接到新库上,或者从新库用test用户连接到源库上:
[oracle@Abbott admin]$ sqlplus abbott/abbott@ogg SQL*Plus: Release 11.2.0.4.0 Production on Wed May 24 16:01:36 2017 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options SQL>3. 新库创建dblink,这里用sys用户登录,创建了一个public的dblink:
SQL> create public database link sjdr connect to test identified by test using 'orcl1'; Database link created.
4. 在源库授予导出用户test执行数据泵的权限:
[oracle@Abbott admin]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on Wed May 24 16:30:58 2017 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options SQL> grant EXP_FULL_DATABASE to test; Grant succeeded.注:如果未授予该权限,在导入导出的时候将报如下错误:
[oracle@ora-ogg admin]$ impdp system/oracle schemas=TEST network_link=sjdr Import: Release 11.2.0.4.0 - Production on Wed May 24 16:24:25 2017 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORA-31631: privileges are required
ORA-39149: cannot link privileged user to non-privileged user5. 在新库中创建test用户所对应的表空间及数据文件:
SQL> create tablespace test datafile '/u01/app/oracle/oradata/orcl/test.dbf' size 20m autoextend on; Tablespace created
6. 执行导入导出:
[oracle@ora-ogg admin]$ impdp system/oracle schemas=TEST network_link=sjdr Import: Release 11.2.0.4.0 - Production on Wed May 24 16:33:16 2017 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYSTEM"."SYS_IMPORT_SCHEMA_01": system/******** schemas=TEST network_link=sjdr
Estimate in progress using BLOCKS method...
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 64 KB
Processing object type SCHEMA_EXPORT/USER
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
. . imported "TEST"."T1" 1 rows
Job "SYSTEM"."SYS_IMPORT_SCHEMA_01" successfully completed at Wed May 24 16:33:30 2017 elapsed 0 00:00:147. 检查结果:
[oracle@ora-ogg admin]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on Wed May 24 16:33:40 2017 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options SQL> select * from test.t1; ID NAME
---------- --------------------
1 zx8. 只导用户表结构,不包含表数据,并且将test用户表结构及对象导入到abbott用户下,修改test用户表空间到abbott表空间:
[oracle@ora-ogg admin]$ impdp system/oracle remap_schema=test:abbott remap_tablespace=test:abbott network_link=sjdr content=metadata_only
9. 新库中abbott用户默认表空间为abbott,如果未指定remap_tablespace,而只是指定remap_schema为abbott,那么导入后对象仍然在TEST表空间中:
[oracle@Abbott ~]$ impdp system/oracle remap_schema=test:abbott network_link=impabbott Import: Release 11.2.0.4.0 - Production on Thu May 25 23:26:00 2017 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYSTEM"."SYS_IMPORT_SCHEMA_01": system/******** remap_schema=test:abbott network_link=impabbott
Estimate in progress using BLOCKS method...
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 64 KB
Processing object type SCHEMA_EXPORT/USER
ORA-31684: Object type USER:"ABBOTT" 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
. . imported "ABBOTT"."T1" 1 rows
Processing object type SCHEMA_EXPORT/FUNCTION/FUNCTION
Processing object type SCHEMA_EXPORT/FUNCTION/GRANT/OWNER_GRANT/OBJECT_GRANT
Processing object type SCHEMA_EXPORT/PROCEDURE/PROCEDURE
Processing object type SCHEMA_EXPORT/FUNCTION/ALTER_FUNCTION
ORA-39082: Object type ALTER_FUNCTION:"ABBOTT"."VERIFY_FUNCTION_11G" created with compilation warnings
Processing object type SCHEMA_EXPORT/PROCEDURE/ALTER_PROCEDURE
ORA-39082: Object type ALTER_PROCEDURE:"ABBOTT"."MM" created with compilation warnings
Processing object type SCHEMA_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Job "SYSTEM"."SYS_IMPORT_SCHEMA_01" completed with 3 error(s) at Thu May 25 23:26:12 2017 elapsed 0 00:00:11 [oracle@Abbott ~]$ sqlplus / as sysdba SQL> conn abbott/abbott
SQL> select * from t1; ID NAME
---------- --------------------
1 zx SQL> select segment_name,tablespace_name from dba_segments where owner='ABBOTT' and segment_name='T1'; SEGMENT_NAME TABLESPACE_NAME
-----------------------------------------
T1 TEST SQL> select segment_name,tablespace_name from dba_segments where segment_name='T1'; #一个test.T1 一个Abbott.T1 SEGMENT_NAME TABLESPACE_NAME
-----------------------------------------------
T1 TEST
T1 TEST10. 使用sys无密码导入导出:
[oracle@Abbott ~]$ impdp \'/ as sysdba\' directory=impdir dumpfile=full.dmp logfile=testim2.log remap_schema=test:abbott
11.用户密码包含特殊符号的导入导出
[oracle@Abbott ~]$ impdp \'sys/\"oracle@#123\" as sysdba\' directory=impdir dumpfile=full.dmp logfile=testim2.log
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