Oracle如何导出sys用户下的系统表

环境：Solaris 10 + Oracle 10.2.0.4

1.导出实例

2.参考内容

Reference

1.导出实例

导出sys用户下的HIST_HEAD$和WRI$_OPTSTAT_HISTHEAD_HISTORY两张表：
由于expdp尝试导出失败，改用传统exp导出,导出命令如下：

% nohup exp system/****** file=/tmp/jy/system_exp_2tables.dmp log=/tmp/jy/exp_system_exp_2tables.log tables=sys.HIST_HEAD\$, sys.WRI\$_OPTSTAT_HISTHEAD_HISTORY &

传统exp可以正常导出，导出过程显示如下：

Export: Release 10.2.0.4.0 - Production on 星期五 10月 30 13:49:51 2015 Copyright (c) 1982, 2007, Oracle. All rights reserved. 连接到: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options 已导出 ZHS16GBK 字符集和 AL16UTF16 NCHAR 字符集 即将导出指定的表通过常规路径... 当前的用户已更改为 SYS . . 正在导出表 HIST_HEAD$导出了 169225445 行 . . 正在导出表 WRI$_OPTSTAT_HISTHEAD_HISTORY 2.参考内容

文档 ID 553402.1

APPLIES TO: Oracle Database - Enterprise Edition - Version 10.2.0.3 and later Information in this document applies to any platform. ***Checked for relevance on 29-Jan-2015*** SYMPTOMS DataPump export of table SYS.AUD$ fails with errors: ORA-39165: Schema SYS was not found. ORA-39166: Object AUD$ was not found. ORA-31655: no data or metadata objects selected for job Job "SYS"."SYS_EXPORT_TABLE_01" completed with 3 error(s) at 13:49:47 CAUSE 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. SOLUTION Export the table SYS.AUD$ using the traditional export: #> exp system/<password> file=dumpfile.dmp log=logfile.log tables=sys.aud$ Reference

DataPump Export (EXPDP) Fails With Error ORA-39165: Schema SYS Was Not Found (文档 ID 553402.1)

注意：即使不考虑性能问题，truncate table HIST_HEAD$也不被允许，只能delete你认为不需要的记录。

SQL> truncate table WRI$_OPTSTAT_HISTHEAD_HISTORY;
 
表被截断。
 
已用时间:  00: 00: 25.98
SQL> truncate table HIST_HEAD$;
truncate table HIST_HEAD$
              *
第 1 行出现错误:
ORA-00701: 无法变更热启动数据库所需的对象
 
% oerr ora 701
00701, 00000, "object necessary for warmstarting database cannot be altered"
// *Cause:  Attempt to alter or drop a database object (table, cluster, or
//          index) which are needed for warmstarting the database.
// *Action: None.