[转]EXP--解決EXP-00091的方法

亦凉 2021-11-29 09:32 255阅读 0赞

FROM:[http://vongates.itpub.net/post/2553/18625][http_vongates.itpub.net_post_2553_18625]

對一個DBA或需使用exp,imp的普通用戶來說，在我們做exp的過程中可能經常會遇到EXP－00091 Exporting questionable statistics.這樣的EXP信息，其實它就是exp的error message，它產生的原因是因為我們exp工具所在的環境變量中的**NLS\_L**ANG與DB中的**NLS\_CHARACTERSET**不一致。但需說明的是，exp-91這個error message對所生成的dump檔沒有影響，生成的dump檔還可以正常的imp（個人體會，不知道有沒有錯），雖然它對我們的dump檔沒有影響，我個人還是不想它出現，大家也有同感吧，　。。下面我們就讓它消失吧。。我們一起來

**step 01　查看DB中的NLS\_CHARACTERSET的值（提供兩種方法）：**

> select \* from nls\_database\_parameters t where t.parameter='NLS\_CHARACTERSET'  
> or  
> select \* from v$nls\_parameters  where parameter='NLS\_CHARACTERSET';  
> SQL> select \* from v$nls\_parameters where parameter='NLS\_CHARACTERSET';
> 
> > PARAMETER       VALUE  
> > \----------------------- 　　----------------------------------------------  
> > NLS\_CHARACTERSET    **ZHT16BIG5**

**step 02　根據step 01查出的NLS\_CHARACTERSET（ZHT16BIG5）來設定exp的環境變量：**

> WINNT> set NLS\_LANG=AMERICAN\_AMERICA.**ZHT16BIG5**  
> LINUX> export NLS\_LANG=AMERICAN\_AMERICA.**ZHT16BIG5**

**附上exp-91的oracle error message 解決方案說明：**

oerr exp 91  
00091, 00000, "Exporting questionable statistics."  
// \*Cause:  Export was able export statistics, but the statistics may not be  
//          usuable. The statistics are questionable because one or more of  
//          the following happened during export: a row error occurred, client  
//          character set or NCHARSET does not match with the server, a query  
//          clause was specified on export, only certain partitions or  
//          subpartitions were exported, or a fatal error occurred while  
//          processing a table.  
// \*Action: To export non-questionable statistics, change the client character  
//          set or NCHARSET to match the server, export with no query clause,  
//          export complete tables. If desired, import parameters can be  
//          supplied so that only non-questionable statistics will be imported,  
//          and all questionable statistics will be recalculated.

转载于:https://www.cnblogs.com/fromchaos/archive/2010/04/27/1722006.html

[http_vongates.itpub.net_post_2553_18625]: http://vongates.itpub.net/post/2553/18625