oracle 存储过程事务使用断点回滚

oracle 存储过程事务使用断点回滚

create   or   replace   procedure  delete_exceed_bound(playtype   varchar2 , end07   varchar2  , end08   varchar2 )
   is

   begin
     delete  lotterydate  where  lotterydate.playtype = playtype  and   lotterydate.lotterydate_name > end07  and  lotterydate.lotterydate_name  like   ' 07% ' ;
     delete  lotterydate  where  lotterydate.playtype = playtype  and   lotterydate.lotterydate_name > end08  and  lotterydate.lotterydate_name  like   ' 08% ' ;
    savepoint p1;
     delete  province_sell_amounts  where  province_sell_amounts.play_no = playtype  and  province_sell_amounts.term > end07  and  province_sell_amounts.term  like   ' 07% ' ;
     delete  province_sell_amounts  where  province_sell_amounts.play_no = playtype  and  province_sell_amounts.term > end08  and  province_sell_amounts.term  like   ' 08% ' ;

     delete  province_winning_prize  where  province_winning_prize.play_no = playtype  and  province_winning_prize.term > end07  and  province_winning_prize.term  like   ' 07% ' ;
     delete  province_winning_prize  where  province_winning_prize.play_no = playtype  and  province_winning_prize.term > end08  and  province_winning_prize.term  like   ' 08% ' ;
    savepoint p2;
     delete  condition_winning_prize  where  condition_winning_prize.play_no = playtype  and  condition_winning_prize.term > end07  and  condition_winning_prize.term  like   ' 07% ' ;
     delete  condition_winning_prize  where  condition_winning_prize.play_no = playtype  and  condition_winning_prize.term > end08  and  condition_winning_prize.term  like   ' 08% ' ;
    savepoint p3;
     delete  open_result  where  open_result.play_no = playtype  and  open_result.term > end07  and  open_result.term  like   ' 07% ' ;
     delete  open_result  where  open_result.play_no = playtype  and  open_result.term > end08  and  open_result.term  like   ' 08% ' ;


  exception
       when  others  then
        dbms_output.put_line(sqlerrm);
         rollback   to  savepoint p1;
   end  delete_exceed_bound;

保存点 (SAVEPOINT) 是事务处理过程中的一个标志，与回滚命令 (ROLLBACK) 结合使用，主要的用途是允许用户将某一段处理回滚而不必回滚整个事务。

 

如果定义了多个savepoint，当指定回滚到某个savepoint时，那么回滚操作将回滚这个savepoint后面的所有操作（即使后面可能标记了N个savepoint）。

在一段处理中定义了3个savepoint，从第2个savepoint回滚，后面的第3个标记的操作都将被回滚，如果不使用ROLLBACK TO savepoint_name而使用ROLLBACK，将会滚整个事务处理。