我想问问，我这么写触发器，对不对，求大神解答

从来没有写过触发器，然后毕设需要，不知道写对了没，这是我建的表，要完成的功能是，当插入数据时，执行这个触发器，即循环插入数据，其中curr_time字段是时间类型,并且按照createdby1自增长方式增加，其中week_num字段从1一直循环到总共周数（count_week）

 create table F_FT_TIME  (
   ROW_ID               NUMBER(18)                      not null,
   CURR_TIME            DATE,
   START_DATE           DATE,
   STOP_DATE            DATE,
   START_YEAR           VARCHAR2(4),
   STOP_YEAR            VARCHAR2(4),
   START_MON            VARCHAR2(2),
   STOP_MON             VARCHAR2(2),
   COUNT_WEEK           CHAR(10),
   WEEK_NUM             VARCHAR2(2),
   WEEK                 VARCHAR2(1),
   LESSON               VARCHAR2(2),
   START_TIME           DATE,
   STOP_TIME            DATE,
   COURSE_ID            NUMBER(18),
   constraint PK_F_FT_TIME primary key (ROW_ID)
)

下面是我写的触发器

 create trigger biufer_F_FT_TIME
after insert
on F_FT_TIME
referencing old as old_value 
new as new_value
declare
 i number;
 k number;
 j number;
begin
for i in new_value.count_week loop
    for k in 7 loop
        for j in 13 loop
            insert into F_FT_TIME(
                curr_time,
                start_date,
                stop_date,
                start_year,
                stop_year,
                start_mon,
                stop_mon,
                count_week,
                week_num,
                week,
                lesson
            ) values(
                new_value.curr_time+(interval createby1.nextval day),
                new_value.start_date,
                new_value.stop_date,
                new_value.start_year,
                new_value.stop_year,
                new_value.start_mon,
                new_value.stop_mon,
                new_value.count_week,
                i,
                k,
                j
            );
        end loop;
    end loop;
end loop;
end;