为什么v_file:=utl_file.fopen(utlfile,file_name,'r');老是报错啊 求教高手

Question

create or replace directory utlfile as 'D:\Tencent';
       grant read,write on directory utlfile to dsp;
       grant execute on utl_file to dsp;
       
       
       
       create or replace procedure read_demo(file_name in varchar2)
       is
       v_file utl_file.file_type;
       v_newline varchar2(300);
       begin
       v_file:=utl_file.fopen(utlfile,file_name,'r');
       
       if utl_file.is_open(v_file) then
       
       loop
          begin
          utl_file.get_line(v_file,v_newline);
           if v_newline is null then
            exit;
           end if;
           
           insert into dtcda01(member_alias,parent_member_id) values(file_name,v_newline);
           end;
       end loop;
       
       end if;
       commit;
       
       end;
       
       
       
       --declare fname varchar2(66):='dd.txt';
       
     begin
       read_demo('dd.txt');
     end;

Answer 1

begin
  read_demo('c:\dd.txt');
  end;

Answer 2

  CREATE OR REPLACE PROCEDURE READ_DEMO(FILE_NAME IN VARCHAR2) IS
  V_FILE    UTL_FILE.FILE_TYPE;
  V_NEWLINE VARCHAR2(300);
BEGIN
  V_FILE := UTL_FILE.FOPEN('UTLFILE', FILE_NAME, 'r');  IF UTL_FILE.IS_OPEN(V_FILE) THEN    LOOP
      BEGIN
        UTL_FILE.GET_LINE(V_FILE, V_NEWLINE);
        
        INSERT INTO DTCDA01
          (MEMBER_ALIAS, PARENT_MEMBER_ID)
        VALUES
          (FILE_NAME, V_NEWLINE);
      EXCEPTION                    --跳出循环错误，用no_date_found 跳出循环
        WHEN no_data_found THEN
          EXIT;
      END;
    END LOOP;  END IF;
  COMMIT;END;