PLS-00201: identifier 'SYS.DBMS_EXPORT_EXTENSION' must be declared

導出語句的時候，顯示：

EXP-00056: ORACLE error 6550 encountered
ORA-06550: line 1, column 15:
PLS-00201: identifier 'SYS.DBMS_EXPORT_EXTENSION' must be declared
ORA-06550: line 1, column 15:
PL/SQL: Statement ignored
EXP-00000: Export terminated unsuccessfully

這個問題困擾了我半天。後來發現是導入導出的權限沒有賦予：

這個時候，就需要賦予權限就可以了：

GRANT EXECUTE ON SYS.DBMS_DEFER_IMPORT_INTERNAL TO ustcdms;
GRANT EXECUTE ON SYS.DBMS_EXPORT_EXTENSION TO ustcdms;