exp的一個(gè)用戶的時(shí)候,發(fā)現(xiàn)了一個(gè)錯(cuò)誤.

EXP-00091:Exporting questionable statistics.

網(wǎng)上查到一個(gè)處理方法.收集到這里來了.

對(duì)一個(gè)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(jīng)常會(huì)遇到EXP－00091 Exporting questionable statistics.這樣的EXP信息，其實(shí)它就是exp的error message，它產(chǎn)生的原因是因?yàn)槲覀僥xp工具所在的環(huán)境變量中的NLS_LANG與DB中的NLS_CHARACTERSET不一致。但需說明的是，exp-91這個(gè)error message對(duì)所生成的dump檔沒有影響，生成的dump檔還可以正常的imp(個(gè)人體會(huì)，不知道有沒有錯(cuò))，雖然它對(duì)我們的dump檔沒有影響，我個(gè)人還是不想它出現(xiàn)，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(jù)step 01查出的NLS_CHARACTERSET(ZHT16BIG5)來設(shè)定exp的環(huán)境變量：

WINNT> set NLS_LANG=AMERICAN_AMERICA.ZHT16BIG5LINUX> 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.

總結(jié)

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