ORA-31603: object "orders" of type TABLE not found in schema "SYSTEM"

问题:

SQL> select dbms_metadata.get_ddl('TABLE','orders') from dual;
ERROR:
ORA-31603: object "orders" of type TABLE not found in schema "SYSTEM"
ORA-06512: at "SYS.DBMS_METADATA", line 1546
ORA-06512: at "SYS.DBMS_METADATA", line 1583
ORA-06512: at "SYS.DBMS_METADATA", line 1901
ORA-06512: at "SYS.DBMS_METADATA", line 2792
ORA-06512: at "SYS.DBMS_METADATA", line 4333
ORA-06512: at line 1

解决:

dbms_metadata.get_ddl()参数都大写; 

信息显示不全，set long 999 完全显示。