文档课题：oracle数据泵+dblink 不落盘导单表的测试.
源  端：oracle 19.13 数据库实例(tmis)    IP(192.168.133.101)  单实例
目标端：oracle 19.13 数据库实例(orclcdb) IP(192.168.133.101)  多租户
1、数据确认
1.1、源端数据
leo@TMIS> show user;
USER is "LEO"

leo@TMIS> select * from fruits;

F_ID             S_ID F_NAME                            F_PRICE
---------- ---------- ------------------------------ ----------
a1                101 apple                                 5.2
b1                101 blackberry                           10.2
bs1               102 orange                               11.2
bs2               105 melon                                 8.2

leo@TMIS> select * from books;

     BK_ID BK_TITLE                                           COPYRIGHT
---------- -------------------------------------------------- -------------------
     11078 Learning MYSQL                                     2010-01-01 00:00:00
     11033 Study Html                                         2011-01-01 00:00:00
	 
leo@TMIS> select TABLE_NAME,tablespace_name from user_tables where table_name in ('BOOKS','FRUITS');

TABLE_NAME           TABLESPACE_NAME
-------------------- --------------------
BOOKS                USERS
FRUITS               USERS
1.2、目标端数据
leo@ORCLPDB> select * from fruits;

F_ID             S_ID F_NAME                            F_PRICE
---------- ---------- ------------------------------ ----------
a1                101 apple                                 5.2
b1                101 blackberry                           10.2

leo@ORCLPDB> select * from books;

     BK_ID BK_TITLE                                           COPYRIGHT
---------- -------------------------------------------------- -------------------
     11078 Learning MYSQL                                     2010-01-01 00:00:00
     11033 Study Html                                         2011-01-01 00:00:00
     11035 How to use php                                     2003-01-01 00:00:00
     11072 Teach yourself javascript                          2005-01-01 00:00:00

leo@ORCLPDB> select TABLE_NAME,tablespace_name from user_tables where table_name in ('BOOKS','FRUITS');

TABLE_NAME           TABLESPACE_NAME
-------------------- --------------------
BOOKS                USERS
FRUITS               USERS

2、导入前准备
2.1、源端建连接用户
sys@TMIS> create user ogg identified by ogg;

User created.

sys@TMIS> grant connect,resource,unlimited tablespace,dba to ogg;

Grant succeeded.

--测试ogg用户的连通情况.
[oracle@leo-oracle-19c admin]$ sqlplus ogg/ogg@tmis

SQL*Plus: Release 19.0.0.0.0 - Production on Mon Jul 29 14:29:09 2024
Version 19.13.0.0.0

Copyright (c) 1982, 2021, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.13.0.0.0

ogg@TMIS> exit
Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.13.0.0.0
[oracle@leo-oracle-19c admin]$ tnsping tmis

TNS Ping Utility for Linux: Version 19.0.0.0.0 - Production on 29-JUL-2024 14:29:16

Copyright (c) 1997, 2021, Oracle.  All rights reserved.

Used parameter files:
/u01/app/oracle/product/19.3.0/db/network/admin/sqlnet.ora


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = leo-oracle-19c)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = tmis)))
OK (10 msec)

2.2、目标端建导入用户
sys@ORCLCDB> show con_name

CON_NAME
------------------------------
ORCLPDB

sys@ORCLCDB> drop user ogg;

User dropped.

sys@ORCLCDB> create user ogg identified by ogg;

User created.

sys@ORCLCDB> grant connect,resource,unlimited tablespace,dba,IMPORT FULL DATABASE TO ogg;

Grant succeeded.

[oracle@leo-oracle-19c ~]$ sqlplus ogg/ogg@192.168.133.101:1521/orclpdb

SQL*Plus: Release 19.0.0.0.0 - Production on Mon Jul 29 14:52:59 2024
Version 19.13.0.0.0

Copyright (c) 1982, 2021, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.13.0.0.0

ogg@ORCLPDB> show con_name

CON_NAME
------------------------------
ORCLPDB

2.3、目标端建dblink
2.3.1、tnsnames.ora文件
确保tnsnames.ora有如下内容：
TMIS =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = leo-oracle-19c)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = tmis)
    )
  )
 
sys@ORCLCDB> sho con_name

CON_NAME
------------------------------
ORCLPDB

2.3.1、建dblink
sys@ORCLCDB> create public database link TMIS_LINK connect to ogg identified by ogg using 'TMIS';

Database link created.

--测试dblink.
sys@ORCLCDB> select * from leo.fruits@TMIS_LINK;

F_ID             S_ID F_NAME                            F_PRICE
---------- ---------- ------------------------------ ----------
a1                101 apple                                 5.2
b1                101 blackberry                           10.2
bs1               102 orange                               11.2
bs2               105 melon                                 8.2

sys@ORCLCDB> select * from leo.books@TMIS_LINK;

     BK_ID BK_TITLE                                           COPYRIGHT
---------- -------------------------------------------------- -------------------
     11078 Learning MYSQL                                     2010-01-01 00:00:00
     11033 Study Html                                         2011-01-01 00:00:00

2.4、目标端建directory
sys@ORCLCDB> create directory impdp_dir as '/home/oracle/dump';

Directory created.

sys@ORCLCDB> grant read,write on directory impdp_dir to public;

Grant succeeded.

2.5、编辑导入脚本
[oracle@leo-oracle-19c ~]$ cat impdp.sh 
#!/bin/bash
export ORACLE_SID=orclcdb
impdp ogg/ogg@192.168.133.101:1521/orclpdb \
network_link=TMIS_LINK \
remap_schema=LEO:LEO \
tables=leo.fruits,leo.books \
REMAP_TABLESPACE=USERS:USERS \
table_exists_action=replace \
directory=impdp_dir \
parallel=8 \
job_name=impdp#LEO.job \
logfile=impdp#LEO.out
[oracle@leo-oracle-19c ~]$ sh impdp.sh

Import: Release 19.0.0.0.0 - Production on Mon Jul 29 15:09:07 2024
Version 19.13.0.0.0

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
FLASHBACK automatically enabled to preserve database integrity.
Starting "OGG"."IMPDP#LEO":  ogg/********@192.168.133.101:1521/orclpdb network_link=TMIS_LINK remap_schema=LEO:LEO tables=leo.fruits,leo.books REMAP_TABLESPACE=USERS:USERS table_exists_action=replace directory=impdp_dir parallel=8 job_name=impdp#LEO.job logfile=impdp#LEO.out 
Estimate in progress using BLOCKS method...
Processing object type TABLE_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 128 KB
Processing object type TABLE_EXPORT/TABLE/TABLE
. . imported "LEO"."BOOKS"                                    2 rows
. . imported "LEO"."FRUITS"                                   4 rows
Processing object type TABLE_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
Processing object type TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
Processing object type TABLE_EXPORT/TABLE/STATISTICS/MARKER
Job "OGG"."IMPDP#LEO" successfully completed at Mon Jul 29 15:09:16 2024 elapsed 0 00:00:08

3、数据验证
--目标端进行数据验证.
leo@ORCLPDB> select * from books;

     BK_ID BK_TITLE                                           COPYRIGHT
---------- -------------------------------------------------- -------------------
     11078 Learning MYSQL                                     2010-01-01 00:00:00
     11033 Study Html                                         2011-01-01 00:00:00

leo@ORCLPDB> select * from fruits;

F_ID             S_ID F_NAME                            F_PRICE
---------- ---------- ------------------------------ ----------
a1                101 apple                                 5.2
b1                101 blackberry                           10.2
bs1               102 orange                               11.2
bs2               105 melon                                 8.2

说明：如上所示，导入后目标端数据与源端数据保持一致.