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  • EXP00091 Exporting questionable statistics

    在我们对Oracle做EXP的过程中,可能会经常遇到EXP-00091 Exporting questionable statistics.的信息,其实它就是exp的error message,它产生的原因是因为我们exp工具所在的环境变量是的NLS LANG中的NLS_CHARCATERSET不一致引起的。但需要说明的是,EXP-00091这个error对所生成的dump文件没有影响,生成的dump文件还可以正常imp。

    下面我们来解决这个问题,让其不再出现:

    1.查看DB中的NLS_CHARACTERSET的值(提供两种方法):

    查询NLS_CHARACTERSET的值:
    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

    2.根据第一步查出的NLS_CHARACTERSET(ZHT16BIG5)来设定exp的环境变量:

    WINNT> set NLS_LANG=AMERICAN_AMERICA.ZHT16BIG5

    进行设定后,在环境变量中查看NLS_LANG的值是否一致,如果不一致可在环境变量中手中修改。
    LINUX> export NLS_LANG=AMERICAN_AMERICA.ZHT16BIG5

    附上exp-00091的oracle error message 解決方案说明:

    error 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.


    作者:czjie
    出处:http://www.cnblogs.com/czjie/
    本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。

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  • 原文地址:https://www.cnblogs.com/czjie/p/2890760.html
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