GET_DDL function

Question

Dear friends,
I could not find the reason for below query is not executed for EMP table,
whereas other tables are shown perfectly.
SQL> select dbms_metadata.get_ddl('TABLE','EMP') from dual;
ERROR:
ORA-31603: object "EMP" of type TABLE not found in schema "SCOTT"
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105
ORA-06512: at "SYS.DBMS_METADATA", line 626
ORA-06512: at "SYS.DBMS_METADATA", line 1205
ORA-06512: at line 1
no rows selected
SQL> desc emp
Name                                                 Null?    Type
EMPNO                                                NOT NULL NUMBER(4)
ENAME                                                         VARCHAR2(10)
JOB                                                           VARCHAR2(9)
MGR                                                           NUMBER(4)
HIREDATE                                                      DATE
SAL                                                           NUMBER(7,2)
COMM                                                          NUMBER(7,2)
DEPTNO                                                        NUMBER(2)

Answer 1

SQL> select object_type, owner, object_name
  2  from all_objects where object_name='EMP';
OBJECT_TYPE        OWNER                          OBJECT_NAME
TABLE              SCOTT                          EMP
TABLE              JAMES                          EMP
TABLE              SCOT                           EMP
TABLE              SHAMS                          EMP
SQL> select dbms_metadata.get_ddl('TABLE','EMP','SHAMS') from dual;
DBMS_METADATA.GET_DDL('TABLE','EMP','SHAMS')
  CREATE TABLE "SHAMS"."EMP"
   (    "EMPNO" NUMBER(4,0) NOT NULL ENABLE,
        "ENAME" VARCHAR2(10),
        "JOB" VARCHAR2(9),
        "MGR" NUMBER(4,0),
        "HIREDATE" DATE,
        "SAL" NUMBER(7,2),
        "COMM" NUMBER(7,2),
        "DEPTNO" NUMBER(2,0),
         PRIMARY KEY ("EMPNO")
  USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCRE
ASE 0
  FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "JAMES_TS"  ENAB
LE
   ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 LOGGING
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCRE
ASE 0
  FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "JAMES_TS"
SQL> select dbms_metadata.get_ddl('TABLE','EMP','JAMES') from dual;
ERROR:
ORA-31603: object "EMP" of type TABLE not found in schema "JAMES"
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105
ORA-06512: at "SYS.DBMS_METADATA", line 626
ORA-06512: at "SYS.DBMS_METADATA", line 1205
ORA-06512: at line 1
no rows selected