在使用expdp导出table时，一直报ORA-39166找不到对象？而table明明是存在的，甚至在sqlplus里面使用host+同样的expdp就能成功导出？

E:>expdp ning/ning directory=tmp dumpfile=test.dmp tables=ning.t;

Export: Release 10.2.0.3.0 - Production on Wednesday, 28 March, 2007 10:03:37

Copyright (c) 2003, 2005, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production

With the Partitioning, OLAP and Data Mining options

Starting "NING"."SYS_EXPORT_TABLE_01": ning/******** directory=tmp dumpfile=test.dmp tables=ning.t;

Estimate in progress using BLOCKS method...

Processing object type TABLE_EXPORT/TABLE/TABLE_DATA

Total estimation using BLOCKS method: 0 KB

ORA-39165: Schema NING was not found.

ORA-39166: Object T; was not found.

ORA-31655: no data or metadata objects selected for job

Job "NING"."SYS_EXPORT_TABLE_01" completed with 3 error(s) at 10:03:45

E:>sqlplus ning/ning

SQL*Plus: Release 10.2.0.3.0 - Production on Wed Mar 28 10:04:16 2007

Copyright (c) 1982, 2006, Oracle. All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production

With the Partitioning, OLAP and Data Mining options

host">NING@ning>hostexpdp ning/ning directory=tmp dumpfile=test.dmp tables=ning.t;

Export: Release 10.2.0.3.0 - Production on Wednesday, 28 March, 2007 10:04:26

Copyright (c) 2003, 2005, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production

With the Partitioning, OLAP and Data Mining options

Starting "NING"."SYS_EXPORT_TABLE_01": ning/******** directory=tmp dumpfile=test.dmp tables=ning.t

Estimate in progress using BLOCKS method...

Processing object type TABLE_EXPORT/TABLE/TABLE_DATA

Total estimation using BLOCKS method: 64 KB

Processing object type TABLE_EXPORT/TABLE/TABLE

Processing object type TABLE_EXPORT/TABLE/INDEX/INDEX

Processing object type TABLE_EXPORT/TABLE/CONSTRAINT/CONSTRAINT

Processing object type TABLE_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS

. . exported "NING"."T" 9.421 KB 10 rows

Master table "NING"."SYS_EXPORT_TABLE_01" successfully loaded/unloaded

***************************************************************

Dump file set for NING.SYS_EXPORT_TABLE_01 is:

D:TEST.DMP

Job "NING"."SYS_EXPORT_TABLE_01" successfully completed at 10:04:42

出现该状况，请仔细检查你的expdp命令，是不是在最后加了个逗号？犯了像上面链接里的楼主一样错误？习惯在sqlplus将每个命令加上逗号后，这个错误还是比较容易犯的，我也是在遇到这个状况后google到上面的帖子的。

出现该问题的原因在于，在os的命令行上使用了分号做为结尾，实际上是不需要的，不但是多次一举，还导致expdp将后面的分号也算到表名里面去了，即使你将表名加上括号加上引号也没用，expdp会将分号也当成一个对象名来导出，自然无法找到对象，这个应该也算是oracle的一个bug。

而在sqlplus里，由于命令默认是分号结束的，所以没有问题。

实际上，oracle的expdp确实也有两个bug是会导致出现ORA-39166错误的，一个是table的名字里含有小写字母，也就是建表的时候将表名用双引号引起来，里面是有小写字母的。Bug No. 5606526

还有一种情况是导出sys schema下的对象的时候 Bug No. 5402988