关于“EXP-00056: ORACLE error 12154 encountered”的解决方法

有用户问到这样一个问题，在进行导出操作时如何转义口令中的@符号？由于缺省的Oracle会将@符号后面的字串当作服务名来解析，所以不加处理是不行的。有的企业因为安全规则的需要，口令中都会加入@符号。

假定用户口令如下： SQL> alter user eygle identified by "eygle@com";

User altered. 

如果缺省导出会出现如下错误： [oracle@jumper oracle]$ exp eygle/eygle@com file=eygle.dmp tables=test

Export: Release 9.2.0.4.0 - PRoduction on Fri Jan 4 11:17:48 2008Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.

EXP-00056: ORACLE error 12154 encounteredORA-12154: TNS:could not resolve service nameEXP-00000: Export terminated unsuccessfully 

通过转义，可以成功导出： [oracle@jumper oracle]$ exp eygle//"eygle@com/" file=eygle.dmp tables=test

Export: Release 9.2.0.4.0 - Production on Fri Jan 4 11:12:10 2008Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.

Connected to: Oracle9i Enterprise Edition Release 9.2.0.4.0 - ProductionWith the Partitioning optionJServer Release 9.2.0.4.0 - ProductionExport done in ZHS16GBK character set and AL16UTF16 NCHAR character set

About to export specified tables via Conventional Path .... . exporting table                          TEST      4136 rows exported 

-The End-