使用impdp导出数据时碰到ora-39006错误，错误提示如下所示：
ORA-39006: internal error ORA-39213: Metadata processing is not available
初看到internal error的错误提示，下了一跳。Google一番的结果如下：
Cause: The Data Pump could not use the Metadata API. Typically, this is caused by the XSL stylesheets not being set up properly. Action: Connect AS SYSDBA and execute dbms_metadata_util.load_stylesheets to reload the stylesheets.
数据泵无法使用元数据API，需要以sysdba身份登录，执行：
SQL> execute dbms_metadata_util.load_stylesheets; PL/SQL procedure successfully completed.
原文：https://www.cnblogs.com/zhangmingcheng/p/10245489.html