job还是job

declare
jobno binary_integer;
rm_days number;
rm_hour number;  --传入的hour
my_hour number;    --取出当前时间的hour
my_interval_day number;
my_interval varchar2(20);      

my_sql  varchar2(200);
my_next_date varchar2(200);
my_yymmdd varchar2(200);
my_own_sql varchar2(2000);

begin
  rm_days:=30;
  rm_hour:=11;
  my_interval_day:=1;
  my_sql:='''delete from log_info_bak where currenttime <sysdate-'||rm_days||';''';
  dbms_output.put_line('my_sql is: '||my_sql);
 
  --判断两个hour
  select to_number(to_char(sysdate,'hh24')) into my_hour from dual;
--  dbms_output.put_line(my_hour);
 
 
 
 
       --16          18
  if rm_hour < my_hour then
  rm_hour:=rm_hour;
  select to_char(sysdate+1,'yyyy-mm-dd') into my_yymmdd from dual;
 
   my_next_date:='to_date('''||my_yymmdd ||' '||rm_hour||':00:00'' ,''yyyy-mm-dd hh24:mi:ss'')';  
    --20        18
  elsif  rm_hour>my_hour then
      select to_char(sysdate,'yyyy-mm-dd') into my_yymmdd from dual;
         my_next_date:='to_date('''||my_yymmdd ||' '||rm_hour||':00:00'' ,''yyyy-mm-dd hh24:mi:ss'')';  
   
--  dbms_output.put_line(rm_hour);
  end if;

 
dbms_output.put_line('my_next_date is:'||my_next_date);

 my_interval:='''sysdate+'||to_char(my_interval_day)||'''';     
--my_interval:='sysdate+1';

dbms_output.put_line('my_interval is: '||my_interval);

my_own_sql:=' declare jobno binary_integer; begin dbms_job.submit(job => jobno,what => '||my_sql||',next_date => '||my_next_date||',interval =>'||my_interval||'); commit; end;';
dbms_output.put_line(my_own_sql);

execute immediate my_own_sql;
 /* dbms_job.submit(job => jobno,
                      what => my_sql,
                      next_date => my_next_date,
                      interval => my_interval);*/
  commit;
end;

--测试部分
/*
系统 time 11:00:00   任务时间 9点   结果 执行时间推迟到 to_date('2016-12-21 9:00:00' ,'yyyy-mm-dd hh24:mi:ss')
系统 time 9:00:00    任务时间 11点   结果 执行时间推迟到 to_date('2016-12-20 11:00:00' ,'yyyy-mm-dd hh24:mi:ss')
*/