SQL> desc oss03.VW_OSS_PM_MONTH_3_201112;
 Name                                      Null?    Type
 ----------------------------------------- -------- ---------------------------

 RECDATE                                   NOT NULL NUMBER(8)
 USERNUMBER                                NOT NULL VARCHAR2(32)
 MODULEID                                  NOT NULL NUMBER(8)
 CHANNELID                                 NOT NULL NUMBER(8)
 OPERID                                    NOT NULL NUMBER(10)
 CONTENTID                                 NOT NULL NUMBER(10)
 SERVICEID                                 NOT NULL NUMBER(10)
 OPERTYPE                                  NOT NULL NUMBER(10)
 PROVCODE                                  NOT NULL NUMBER(5)
 AREACODE                                  NOT NULL NUMBER(5)
 SERVICEITEM                               NOT NULL VARCHAR2(20)
 ORDERTYPE                                 NOT NULL NUMBER(8)
 CARDTYPE                                  NOT NULL NUMBER(8)
 BINDTYPEID                                NOT NULL NUMBER(10)
 SEQNO                                              NUMBER(10)
 TOTALCOUNT                                NOT NULL NUMBER(10)
 EXTCOUNT1                                          NUMBER(10)
 ORIGINID                                  NOT NULL NUMBER(10)
 
 
SQL> Select Dbms_Metadata.Get_Ddl('VIEW','VW_OSS_PM_MONTH_3_201112','OSS03') From dual;
ERROR:
ORA-31603: object "VW_OSS_PM_MONTH_3_201112" of type VIEW not found in schema
"OSS03"
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105
ORA-06512: at "SYS.DBMS_METADATA", line 2806
ORA-06512: at "SYS.DBMS_METADATA", line 4333
ORA-06512: at line 1

  1* select text from user_views where view_name = 'AUTO'
18:50:22 SQL> /

TEXT
--------------------------------------------------------------------------------
select "NAME","PASSENGERS","PRICE" from car

grant select_catalog_role to myuser;

SQL> Select Dbms_Metadata.Get_Ddl('VIEW','VW_OSS_PM_MONTH_3_201112','OSS03') From dual;
ERROR:
ORA-31603: object "VW_OSS_PM_MONTH_3_201112" of type VIEW not found in schema
"OSS03"
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105
ORA-06512: at "SYS.DBMS_METADATA", line 2806
ORA-06512: at "SYS.DBMS_METADATA", line 4333
ORA-06512: at line 1

Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> create or replace force view v_test (col1, col2) as
  2  select 1 a, 2 b from dual;

View created.

SQL> desc v_test
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 COL1                                               NUMBER
 COL2                                               NUMBER

SQL> set long 1000
SQL> SELECT text FROM all_views WHERE view_name = 'V_TEST';

TEXT
--------------------------------------------------------------------------------
select 1 a, 2 b from dual

SQL> Select Dbms_Metadata.Get_Ddl('VIEW','V_TEST','BOB') From dual;

DBMS_METADATA.GET_DDL('VIEW','V_TEST','BOB')
--------------------------------------------------------------------------------

  CREATE OR REPLACE FORCE VIEW "BOB"."V_TEST" ("COL1", "COL2") AS
  select 1 a, 2 b from dual



SQL> 

SQL> create or replace view v as select * from t;

View created.

SQL> grant select on v to test;

Grant succeeded.

SQL> connect test/test
Connected.
TEST> select text from all_views where owner='MICHEL' and view_name='V';
TEXT
--------------------------------------------------------------------------------------------
select "ID","FLAG" from t

1 row selected.

SQL> select dbms_metadata.get_ddl('VIEW','V') from dual;
DBMS_METADATA.GET_DDL('VIEW','V')
----------------------------------------------------------------

  CREATE OR REPLACE FORCE VIEW "MICHEL"."V" ("ID", "FLAG") AS
  select "ID","FLAG" from t

create or replace function get_view_ddl (
  p_view  all_views.view_name%type,
  p_owner all_views.owner%type default USER
  )
return clob
authid current_user
is
  l_ddl    clob;
  l_text   clob;
  l_cursor integer      := dbms_sql.open_cursor;
  l_query  varchar2(200) := 
           'select text from all_views where owner=:o and view_name=:v';
  l_lg     pls_integer   := 32767;
  l_pos    pls_integer   := 0;
  l_rc     pls_integer;
  l_retlg  pls_integer;
  l_sep    varchar2(1)   := ' ';
  l_cons   all_constraints.constraint_name%type;

begin

  -- Initialize DDL string
  l_ddl := 'CREATE OR REPLACE FORCE VIEW "'||p_owner||'"."'||p_view||'" (
';

  -- Add column names
  for rec in (
    select column_name from all_tab_columns
    where owner = p_owner and table_name = p_view
  ) loop
    l_ddl := l_ddl || '  ' || l_sep || '"' || rec.column_name || '"
';
    l_sep := ',';
  end loop;
  l_ddl := l_ddl || '  ) AS 
';

  -- Add text
  dbms_sql.parse (l_cursor, l_query, dbms_sql.native);
  dbms_sql.bind_variable (l_cursor, 'o', p_owner);
  dbms_sql.bind_variable (l_cursor, 'v', p_view);
  dbms_sql.define_column_long (l_cursor, 1);
  l_rc := dbms_sql.execute (l_cursor);
  if dbms_sql.fetch_rows (l_cursor) > 0 then
    loop
      dbms_sql.column_value_long (l_cursor, 1, l_lg, l_pos, l_text, l_retlg);
      l_pos := l_pos + l_retlg;
      exit when l_retlg = 0;
      l_ddl := l_ddl || l_text;
    end loop;
  end if;
  dbms_sql.close_cursor (l_cursor);

  -- Add optional constraint name
  begin
    select constraint_name into l_cons from all_constraints
    where owner=p_owner and table_name=p_view and constraint_type='V';
    if l_cons not like 'SYS_C%' then
      l_ddl := l_ddl || ' constraint '||l_cons;
    end if;
  exception when no_data_found then null;
  end;

  -- End
  l_ddl := l_ddl || '
/';
  return l_ddl;

exception 
  when others then 
    -- DEBUG
    dbms_output.put (dbms_utility.format_error_stack);
    dbms_output.put (dbms_utility.format_error_backtrace);
    -- End of DEBUG
    if dbms_sql.is_open (l_cursor) then
      dbms_sql.close_cursor (l_cursor);
    end if;
    raise;

end get_view_ddl;
/
show error

SQL> create or replace force view v_test (col1, col2) as
  2  select 1 a, 2 b from dual;

View created.

SQL> select get_view_ddl('V_TEST') from dual;
GET_VIEW_DDL('V_TEST')
----------------------------------------------------------
CREATE OR REPLACE FORCE VIEW "MICHEL"."V_TEST" (
   "COL1"
  ,"COL2"
  ) AS
select 1 a, 2 b from dual
/

1 row selected.