合 expdp 导出sys用户下的表报错ORA-39165 和ORA-39166

expdp 导出 sys 用户下的表报错 ORA-39165 和 ORA-39166
[oracle@orcltest ~]$ expdp \'/ AS SYSDBA\' directory=DATA_PUMP_DIR tables='SYS.WRH$_ACTIVE_SESSION_HISTORY','SYS.WRM$_SNAPSHOT','SYS.WRH$_EVENT_NAME','SYS.WRH$_SQLCOMMAND_NAME','SYS.WRH$_PLAN_OPERATION_NAME','SYS.WRH$_PLAN_OPTION_NAME','SYS.WRH$_TOPLEVELCALL_NAME' dumpfile=expdp_ash_lhr_01.dmp parfile=/tmp/expdp_ash_lhr_01.par EXCLUDE=STATISTICS VERSION=11.2.0.1 REUSE_DUMPFILES=Y

Export: Release 11.2.0.3.0 - Production on Fri Dec 16 16:49:52 2016

Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
Starting "SYS"."SYS_EXPORT_TABLE_03": "/**** AS SYSDBA" directory=DATA_PUMP_DIR tables=SYS.WRH$_ACTIVE_SESSION_HISTORY,SYS.WRM$_SNAPSHOT,SYS.WRH$_EVENT_NAME,SYS.WRH$_SQLCOMMAND_NAME,SYS.WRH$_PLAN_OPERATION_NAME,SYS.WRH$_PLAN_OPTION_NAME,SYS.WRH$_TOPLEVELCALL_NAME dumpfile=expdp_ash_lhr_01.dmp parfile=/tmp/expdp_ash_lhr_01.par EXCLUDE=STATISTICS VERSION=11.2.0.1 REUSE_DUMPFILES=Y
Estimate in progress using BLOCKS method...
Total estimation using BLOCKS method: 0 KB
ORA-39166: Object SYS.WRH$_ACTIVE_SESSION_HISTORY was not found.
ORA-39166: Object SYS.WRM$_SNAPSHOT was not found.
ORA-39166: Object SYS.WRH$_EVENT_NAME was not found.
ORA-39166: Object SYS.WRH$_SQLCOMMAND_NAME was not found.
ORA-39166: Object SYS.WRH$_PLAN_OPERATION_NAME was not found.
ORA-39166: Object SYS.WRH$_PLAN_OPTION_NAME was not found.
ORA-39166: Object SYS.WRH$_TOPLEVELCALL_NAME was not found.
ORA-31655: no data or metadata objects selected for job
Job "SYS"."SYS_EXPORT_TABLE_03" completed with 8 error(s) at 16:49:53

于是就搜到了如下文章：

ataPump Export (EXPDP) Fails With Error ORA-39165 Schema SYS Was Not Found (Doc ID 553402.1)

该文章给出了如下答案：

1. There is a restriction on dataPump export. It cannot export schemas like SYS, ORDSYS, EXFSYS, MDSYS, DMSYS, CTXSYS, ORDPLUGINS, LBACSYS, XDB, SI_INFORMTN_SCHEMA, DIP, DBSNMP and WMSYS in any mode.

2. The Utilities Guide indicates the restriction only on full export mode, but the restriction actually applies to all modes.

MOS ： Why Can an Object Not Be Exported? Expdp of SYSTEM User's Table Returns ORA-39166 or ORA-31655 (文档 ID 2114233.1) 列出来了哪些对象不能导出：

Objects (tables, views, schemas, etc) which fall under either of below conditions are not exported with expdp because they are regarded as system maintained objects.

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