PLSQL块的执行

DECLARE
  X         NUMBER(3);
  Y         NUMBER(3);
  V_COUNTER NUMBER(2);
  v_str     VARCHAR2(1000);
BEGIN
  X := 1;
  v_str := 'insert into user_info values((select (max(USERID) + 1) from USER_INFO),''aa'',''aa'',0,''2007-09-12'',''[e-mail]'',''0'',''demo'')';
  FOR V_COUNTER IN 1 .. 1000 LOOP
  --begin
  insert into user_info values((select (max(USERID) + 1) from USER_INFO),'aa','aa',0,'2007-09-12','[e-mail]','0','demo');
  --DBMS_SQL.EXECUTE(v_str);
    --exec immediate v_str;
    --IF V_COUNTER = 4 THEN
      --GOTO end_of_loop;
    --END IF;
    --X := X + 10;
    --end;
  END LOOP;
  --<<end_of_loop>>
  Y := X;
  --dbms_output.put_line('Y:'||Y);
  commit;
END;