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

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expdp 导出sys用户下的表报错ORA-39165 和ORA-39166
同事在用expdp导出sys用户下的table，结果报错，全部的log 如下：


    [oracle@hosta ~]$ expdp sys/**** directory=exp_dir dumpfile=fga_log.dmp logfile=fga_log.log tables=fga_log$  
      
    Export: Release 11.2.0.3.0 - Production on Thu Jan 17 13:07:23 2014  
      
    Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.  
      
    UDE-01017: operation generated ORACLE error 1017  
    ORA-01017: invalid username/password; logon denied  
      
    Username: sys as sysdba  
    Password:   
      
    Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production  
    With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,  
    Data Mining and Real Application Testing options  
    Starting "SYS"."SYS_EXPORT_TABLE_01":  sys/******** AS SYSDBA directory=exp_dir dumpfile=fga_log.dmp logfile=fga_log.log tables=fga_log$   
    Estimate in progress using BLOCKS method...  
    Total estimation using BLOCKS method: 0 KB  
    ORA-39166: Object SYS.FGA_LOG$ was not found.  
    ORA-31655: no data or metadata objects selected for job  
    Job "SYS"."SYS_EXPORT_TABLE_01" completed with 2 error(s) at 13:12:8  

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：


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

解决该报错的方法是：
1. 使用exp 导出
2.ctas的方法在不受限制的schema下创建表，然后导出该新建的表
3. use the DBMS_AUDIT_MGMT package of Audit Vault to manage and purge audit data (see Note 731908.1). This allows for the facility to move the AUD$ table out of the SYSTEM tablespace, which can negate the need to export the table.
注意：This issue also applies to other SYS owned auditing tables such as FGA_LOG$