expdp导出dblink
impdp导入dblink
一、public dblink
一、若创建的是public的dblink，默认是不导出的，解决方案见DataPump SCHEMA Level Export (EXPDP) Does Not Export Public Database Links (Doc ID 837839.1)
方案一：
手工查出原库的dblink，在目标库上再手工创建。
方案二：
创建一个parfile.par，里面添加如下内容：
INCLUDE=DB_LINK:“LIKE ‘LINK_%’”
-----%是匹配dblink name（查询select * from DBA_DB_LINKS;中的host列）
操作如下：
只导出dblink：
[oracle@rhel75 backup]$ expdp u1/u1 directory=DATA_DIR dumpfile=dump_link.dmp content=metadata_only full=y parfile=parfile.par logfile=dump_expdp20200701_link5.log &
[1] 67473
[oracle@rhel75 backup]$
Export: Release 12.2.0.1.0 - Production on Thu Jul 2 23:18:07 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
Starting "U1"."SYS_EXPORT_FULL_01": u1/******** directory=DATA_DIR dumpfile=dump_link.dmp content=metadata_only full=y parfile=parfile.par logfile=dump_expdp20200701_link5.log
Processing object type DATABASE_EXPORT/SCHEMA/DB_LINK
Master table "U1"."SYS_EXPORT_FULL_01" successfully loaded/unloaded
******************************************************************************
Dump file set for U1.SYS_EXPORT_FULL_01 is:
/oracle/backup/dump_link.dmp
Job "U1"."SYS_EXPORT_FULL_01" successfully completed at Thu Jul 2 23:18:17 2020 elapsed 0 00:00:09
[1]+ Done expdp u1/u1 directory=DATA_DIR dumpfile=dump_link.dmp content=metadata_only full=y parfile=parfile.par parallel=8 logfile=dump_expdp20200701_link5.log
[oracle@rhel75 backup]$
导入dblink：
[oracle@rhel75 ~]$ impdp u1/u1 directory=DATA_DIR dumpfile=dump_link.dmp logfile=link.log full=y
Import: Release 12.2.0.1.0 - Production on Thu Jul 2 23:20:28 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
ORA-39146: schema "U1" does not exist
Master table "U3"."SYS_IMPORT_FULL_01" successfully loaded/unloaded
Starting "U3"."SYS_IMPORT_FULL_01": u3/******** directory=DATA_DIR dumpfile=dump_link.dmp REMAP_SCHEMA=u1:u3 logfile=link.log full=y
Processing object type DATABASE_EXPORT/SCHEMA/DB_LINK
Job "U3"."SYS_IMPORT_FULL_01" completed with 1 error(s) at Thu Jul 2 23:20:32 2020 elapsed 0 00:00:03
[oracle@rhel75 ~]$
查询：
set pagesize 230
set line 400
col owner for a14
col DB_LINK for a20
col USERNAME for a15
col CREATED for a10
col HOST for a40
select * from DBA_DB_LINKS;
OWNER DB_LINK USERNAME HOST CREATED HID
-------------- -------------------- --------------- ---------------------------------------- ---------- ---
PUBLIC LINK_U2 U2 (DESCRIPTION = 02-JUL-20 NO
(ADDRESS = (PROTOCOL = TCP)(HOST = 1
92.168.56.114)(PORT = 1522))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl11g)
)
)
二、非public dblink
二、测试创建私有dblink
conn u1/u1
create database link link_u2
connect to u2 identified by "u2"
using '(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.114)(PORT = 1522))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl11g)
)
)';
查询：
OWNER DB_LINK USERNAME HOST CREATED HID
-------------- -------------------- --------------- ---------------------------------------- ---------- ---
U1 LINK_U2 U2 (DESCRIPTION = 02-JUL-20 NO
(ADDRESS = (PROTOCOL = TCP)(HOST = 1
92.168.56.114)(PORT = 1522))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl11g)
)
)
导出：
expdp u1/u1 directory=DATA_DIR dumpfile=dump_link2.dmp content=metadata_only schemas=u1 parfile=parfile.par logfile=link5.log
[oracle@rhel75 backup]$ expdp u1/u1 directory=DATA_DIR dumpfile=dump_link2.dmp content=metadata_only schemas=u1 parfile=parfile.par logfile=link5.log
Export: Release 12.2.0.1.0 - Production on Thu Jul 2 23:51:30 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
Starting "U1"."SYS_EXPORT_SCHEMA_01": u1/******** directory=DATA_DIR dumpfile=dump_link2.dmp content=metadata_only schemas=u1 parfile=parfile.par logfile=link5.log
Processing object type SCHEMA_EXPORT/DB_LINK
Master table "U1"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded
******************************************************************************
Dump file set for U1.SYS_EXPORT_SCHEMA_01 is:
/oracle/backup/dump_link2.dmp
Job "U1"."SYS_EXPORT_SCHEMA_01" successfully completed at Thu Jul 2 23:51:36 2020 elapsed 0 00:00:05
[oracle@rhel75 backup]$
删除u1的dblink：
drop database link link_u2;
导入：
impdp u1/u1 directory=DATA_DIR dumpfile=dump_link2.dmp logfile=link.log schemas=u1
[oracle@rhel75 backup]$ impdp u1/u1 directory=DATA_DIR dumpfile=dump_link2.dmp logfile=link.log schemas=u1
Import: Release 12.2.0.1.0 - Production on Thu Jul 2 23:52:47 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
Master table "U1"."SYS_IMPORT_SCHEMA_01" successfully loaded/unloaded
Starting "U1"."SYS_IMPORT_SCHEMA_01": u1/******** directory=DATA_DIR dumpfile=dump_link2.dmp logfile=link.log schemas=u1
Processing object type SCHEMA_EXPORT/DB_LINK
Job "U1"."SYS_IMPORT_SCHEMA_01" successfully completed at Thu Jul 2 23:52:50 2020 elapsed 0 00:00:03
[oracle@rhel75 backup]$
再次查询u1的dblink:
OWNER DB_LINK USERNAME HOST CREATED HID
-------------- -------------------- --------------- ---------------------------------------- ---------- ---
SYS SYS_HUB ORCL11G 24-JUN-20 NO
U1 LINK_U2 U2 (DESCRIPTION = 02-JUL-20 NO
(ADDRESS = (PROTOCOL = TCP)(HOST = 1
92.168.56.114)(PORT = 1522))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl11g)
)
)
测试非公有dblink是否能默认导出：
expdp u1/u1 directory=DATA_DIR dumpfile=dump_u1.dmp schemas=u1 logfile=dump.log &
[oracle@rhel75 backup]$ expdp u1/u1 directory=DATA_DIR dumpfile=dump_u1.dmp schemas=u1 logfile=dump.log &
[1] 70053
[oracle@rhel75 backup]$
Export: Release 12.2.0.1.0 - Production on Thu Jul 2 23:54:47 2020
Copyright (c) 1982, 2017, Oracle and/or its affiliates. All rights reserved.
Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
Starting "U1"."SYS_EXPORT_SCHEMA_01": u1/******** directory=DATA_DIR dumpfile=dump_u1.dmp schemas=u1 logfile=dump.log
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type SCHEMA_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
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/DB_LINK
Processing object type SCHEMA_EXPORT/TABLE/TABLE
Processing object type SCHEMA_EXPORT/TABLE/COMMENT
Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX
Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
. . exported "U1"."T" 8.366 MB 86274 rows
. . exported "U1"."T2" 8.366 MB 86274 rows
. . exported "U1"."TEST" 0 KB 0 rows
Master table "U1"."SYS_EXPORT_SCHEMA_01" successfully loaded/unloaded
******************************************************************************
Dump file set for U1.SYS_EXPORT_SCHEMA_01 is:
/oracle/backup/dump_u1.dmp
Job "U1"."SYS_EXPORT_SCHEMA_01" successfully completed at Thu Jul 2 23:55:47 2020 elapsed 0 00:00:59
结论：非公有dblink默认是导出的；public dblink则默认不导出。