EXP-00091: Exporting questionable statistics.

ora10glinux-> exp userid=***/***@orcl buffer=10240000 file=AA.dmp tables=(BANKRUNDATEBACKUP,IMPORT_TARGETEDLIST,TEST,TEST1,TEST10,TEST2,TEST3,TEST4,TEST5,TEST6,TEST7,TEST8,TESTDMP,BANKRUNDATE2,BANKRUNDATE,DUPLICATETAB,BANK) indexes=y rows=y consistent=y constraints=y

Export: Release 10.2.0.1.0 - Production on Thu Oct 15 11:28:29 2009

Copyright (c) 1982, 2005, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses AL32UTF8 character set (possible charset conversion)

About to export specified tables via Conventional Path ...
. . exporting table BANKRUNDATEBACKUP 505 rows exported
. . exporting table IMPORT_TARGETEDLIST 4178 rows exported
. . exporting table TEST 2606773 rows exported
EXP-00091: Exporting questionable statistics.

...

...

...

解决办法：

ora10glinux-> echo $NLS_LANG

ora10glinux->

ora10glinux->

SQL> SELECT USERENV('LANGUAGE') "Language" FROM DUAL;

Language
----------------------------------------------------
AMERICAN_AMERICA.AL32UTF8

SQL> select * from props$ where name in ('NLS_LANGUAGE','NLS_TERRITORY','NLS_CHARACTERSET','NLS_NCHAR_CHARACTERSET');

NAME
------------------------------
VALUE$
--------------------------------------------------------------------------------
COMMENT$
--------------------------------------------------------------------------------
NLS_LANGUAGE
AMERICAN
Language

NLS_TERRITORY
AMERICA
Territory

NAME
------------------------------
VALUE$
--------------------------------------------------------------------------------
COMMENT$
--------------------------------------------------------------------------------

NLS_CHARACTERSET
AL32UTF8
Character set

NLS_NCHAR_CHARACTERSET
AL16UTF16

NAME
------------------------------
VALUE$
--------------------------------------------------------------------------------
COMMENT$
--------------------------------------------------------------------------------
NCHAR Character set

SQL>

ora10glinux->
ora10glinux-> export NLS_LANG=AMERICAN_AMERICA.AL32UTF8
ora10glinux-> exp userid=***/***@orcl buffer=10240000 file=AA.dmp tables=(BANKRUNDATEBACKUP,IMPORT_TARGETEDLIST,TEST,TEST1,TEST10,TEST2,TEST3,TEST4,TEST5,TEST6,TEST7,TEST8,TESTDMP,BANKRUNDATE2,BANKRUNDATE,DUPLICATETAB,BANK) indexes=y rows=y consistent=y constraints=y

Export: Release 10.2.0.1.0 - Production on Thu Oct 15 11:31:07 2009

Copyright (c) 1982, 2005, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
Export done in AL32UTF8 character set and AL16UTF16 NCHAR character set

About to export specified tables via Conventional Path ...
. . exporting table BANKRUNDATEBACKUP 505 rows exported
. . exporting table IMPORT_TARGETEDLIST 4178 rows exported
. . exporting table TEST 2606773 rows exported
. . exporting table TEST1 65824 rows exported
. . exporting table TEST10 5848064 rows exported
. . exporting table TEST2 182752 rows exported
. . exporting table TEST3 65824 rows exported
. . exporting table TEST4 45688 rows exported
. . exporting table TEST5 65824 rows exported
. . exporting table TEST6 45688 rows exported
. . exporting table TEST7 65824 rows exported
. . exporting table TEST8 5848064 rows exported
. . exporting table TESTDMP 10 rows exported
. . exporting table BANKRUNDATE2 505 rows exported
. . exporting table BANKRUNDATE 29 rows exported
. . exporting table DUPLICATETAB 6 rows exported
. . exporting table BANK 29 rows exported
Export terminated successfully without warnings.
ora10glinux->