db2 proc

下面转载的一个复杂的存储过程，大家一起分享，其实存储过程并没有大家想像中的那么困难，只要你掌握了基本的语法，就一定能写出复杂的过程。复杂的东西都是由简单堆积而成的！！

CREATE PROCEDURE IPD.st_inter_PROF ( IN in_Transfer_id dec(6,0),
                                     IN in_TRANS_TYPE_id dec(2,0),
                                     IN in_begin_date timestamp,
                                     IN in_TRANSFER_name varchar(1024),
                                     OUT o_err_no int,
                                     OUT o_err_msg varchar(1024) )
    LANGUAGE SQL
------------------------------------------------------------------------
-- SQL 存储过程 
------------------------------------------------------------------
--                                         --
--                                                               --
--              抽取acct_item_billingday,acct_item表             --
--              author :zsk   2002/06/27                         --
--              update   by zsk    at  2002/11/25  as  SZ        --
--              move from oracle to db2 by dengl 2002-12-8 as sz --
--              返回值结果：0：执行通过                          --
--                         1：执行不通过                         --
--                        -1：调用本过程时异常出错               --
--              联合体用户是 ADMINISTRATOR  BILL.BILL.* /BILL.CAL.* --
-------------------------------------------------------------------
------------------------------------------------------------------------
P1: BEGIN
      --临时变量出错变量
       declare rec              integer default 0;
       declare SQLCODE          integer default 0;
       declare stmt             varchar(1024);
       declare at_end           integer default 0;
       declare r_code           integer default 0;  
       declare state            varchar(1024) default 'AAA';--记录程序当前所作工作
       declare temp_int         integer default 0;
      --声明变量
       declare v_cycle_str   varchar(1000);
       declare v_sql_str     varchar(2000);
       declare n_num         bigint;
       declare n_rows        bigint;
       declare n_rows_all    bigint;

      --声明放游标的值
       
     --声明动态游标存储变量
        declare c_bill_task_id  integer;
         declare bill_task cursor for s1;
        

      --声明出错处理
        DECLARE EXIT HANDLER FOR SQLEXCEPTION 
          begin
             set r_code=SQLCODE;
             set o_err_no=1;
             set o_err_msg='处理'||state||'出错 '||'错误代码SQLCODE:'||CHAR(r_code);
          end;    
        DECLARE continue HANDLER for not found  
           begin
              SET at_end = 1;
              set o_err_no=100;
           end;

       --开始拉
       select  deal_cycle
       into  v_cycle_str
       from  ipd.transfer_task
       where transfer_id=in_transfer_Id;
       --v_cycle_str:='%'||v_cycle_str;

        if  in_trans_type_id=7
          then   
             set n_num=1;

             ---将汇总数据写入任务表

             update ipd.transfer_task
              set    rows_cnt=0
             where  transfer_id=in_transfer_id;
            
              --声明动态游标
             set stmt=' select  distinct bill_task_id  from  ADMINISTRATOR.bill_task_cycle a , ADMINISTRATOR.billing_cycle b where substr(char(b.CYCLE_BEGIN_DATE),1,4)||substr(char(b.CYCLE_BEGIN_DATE),6,2)='||char((integer(v_cycle_str)-1))||' and   a.billing_cycle_id=b.billing_cycle_id'; 
             prepare s1 from stmt;
            -- execute s1;
            
             open bill_task; --using v_cycle_str;
          --声明完毕
             fetch_loop1:
             loop
                 fetch bill_task into c_bill_task_id   ;
 
         --由于db2和oracle的不同,db2必须先创建一个oracle相连的别名ADMINISTRATOR.*,而不像oracle直接用@to_jif 下面是oracl的源码
         --  v_sql_str:=' update transfer_task
         --                  set  rows_cnt=rows_cnt+(select count(*)
         --                                          from cal.acct_item_billingday_'||rec.bill_task_id||'@to_jf)
         --                  where transfer_id='||in_transfer_id;
         --update by dengl 2002-12-08
        
                set stmt='create nickname ADMINISTRATOR.ACCT_ITEM_BILLINGDAY_'||char(c_bill_task_id)||' for bill.cal.acct_item_billingday_'||char(c_bill_task_id);
       
          --记录
               set state='创建别名'||'ADMINISTRATOR.ACCT_ITEM_BILLINGDAY_'||char(c_bill_task_id);
               call ipd.sp_exec_dsql(stmt,o_err_no);
       
             --o_err_no 是返回的SQLCODE
               if o_err_no<>0
                 then 
                       update ipd.transfer_task
                       set    deal_flag=-1
                       where  transfer_id=in_transfer_id;
                       set o_err_msg='处理'||state||'出错 '||'错误代码SQLCODE:'||CHAR(o_err_no); 
                       set o_err_no=1;
                       return 0;
               end if;
               set v_sql_str=' update ipd.transfer_task set  rows_cnt=rows_cnt+(select count(*)  from '||'ADMINISTRATOR.ACCT_ITEM_BILLINGDAY_'||char(c_bill_task_id)||'    where transfer_id='||char(in_transfer_id);
         
               call ipd.sp_exec_dsql(v_sql_str,o_err_no); 
               if  o_err_no <> 0 
                  then
                     update ipd.transfer_task
                     set    deal_flag=-1
                     where  transfer_id=in_transfer_id;
                     set o_err_msg=char(in_TRANS_TYPE_id)||'传送出错！SQLCODE:'||char(o_err_no);
                     set o_err_no=1;
                     return 0;
               end if ;
               commit;
             end loop fetch_loop1;
             close bill_task;
--汇总数据写入完毕

--建立接口表并插入数据

       ---整理表空间。
             call ipd.bi_settle_tablespace(in_Transfer_id,
                             o_err_no,
                             o_err_msg);--调用此过程，检测表空间
              --返回值不为0，则不执行返回
             set state='整理表空间';
             if o_err_no<>0 
                 then
                    update ipd.TRANSFER_TASK
                    set    DEAL_FLAG=-1
                    where  Transfer_id=in_Transfer_id;
                    commit; 
                    set o_err_msg='处理'||state||'出错 '||'错误代码SQLCODE:'||CHAR(o_err_no); 
                    set o_err_no=1;   
                    return 0;
             end if;

              --创建任务需要的接口表 并把多个表的数据整合到一个表中去,如果是oracle就要使用零时表而db2用别名就代替了
             set stmt='create table ipd.'||in_TRANSFER_name;
             call ipd.sp_exec_dsql(stmt,o_err_no);
             set state='创建接口表ipd.'||in_TRANSFER_name;
             if o_err_no<>0
                 then 
                    update ipd.TRANSFER_TASK
                    set    DEAL_FLAG=-1
                    where  Transfer_id=in_Transfer_id;
                    commit;
                    set o_err_msg='处理'||state||'出错 '||'错误代码SQLCODE:'||CHAR(o_err_no); 
                    set o_err_no=1;   
                    return 0;    
             end if;
         
            --建表完毕开始组合sql语句

             open bill_task using v_cycle_str;
             fetch_loop2:
             loop
                fetch bill_task into c_bill_task_id; 
                if n_num=1 
                    then
                      set  v_sql_str='inter into ipd.'||in_TRANSFER_name||' select * from ACCT_ITEM_BILLINGDAY_'||char(c_bill_task_id);
                    else
                      set v_sql_str=v_sql_str||'   union select * from ADMINISTRATOR.ACCT_ITEM_BILLINGDAY_'||char(c_bill_task_id);
                end if;
                set n_num=n_num+1;
             end loop fetch_loop2;
        
             --组合完毕
         
             --  set v_sql_str:=v_sql_str||'   )';
             set state='向接口表ipd.'||in_TRANSFER_name||'插入数据';
             call ipd.sp_exec_dsql(v_sql_str,o_err_no);
             if o_err_no<>0
                     then 
                         update ipd.TRANSFER_TASK
                         set    DEAL_FLAG=-1
                         where  Transfer_id=in_Transfer_id;
                         commit;
                         set o_err_msg='处理'||state||'出错 '||'错误代码SQLCODE:'||CHAR(o_err_no); 
                         set o_err_no=1;   
                         return 0; 
                     else 
                         update  transfer_task
                         set     deal_flag=2
                         where   transfer_id=in_transfer_id;
                         set o_err_no=0;
                         set o_err_msg=o_err_msg||'任务号为'||char(in_TRANSFER_id)||'抽取成功！';
             end if;
             commit;
              --数据插入完毕

              --删除联合体的别名
             open bill_task using v_cycle_str;
             fetch_loop3:
             loop
                 set stmt='drop  nickname ADMINISTRATOR.ACCT_ITEM_BILLINGDAY_'||char(c_bill_task_id)||' for bill.cal.acct_item_billingday_'||char(c_bill_task_id);
       
                 --记录
                 set state='删除别名'||'ADMINISTRATOR.ACCT_ITEM_BILLINGDAY_'||char(c_bill_task_id);
                 call ipd.sp_exec_dsql(stmt,o_err_no);
                  --o_err_no 是返回的SQLCODE
                 if o_err_no<>0
                    then 
                        update ipd.transfer_task
                        set    deal_flag=-1
                        where  transfer_id=in_transfer_id;
                        set o_err_msg='处理'||state||'出错 '||'错误代码SQLCODE:'||CHAR(o_err_no); 
                        set o_err_no=1;
                        return 0;
                 end if;   
             end loop fetch_loop3;


           -----下账数据接口       
         
           
           else if in_trans_type_id =8 
                   then
                     --帐务表的联合体别名已经建好了

                      set v_sql_str='update ipd.transfer_task set rows_cnt=(select count(*) from   ADMINISTRATOR.acct_item  a , ADMINISTRATOR.billing_cycle b  where a.billing_cycle_id=b.billing_cycle_id  and     substr(char(b.CYCLE_BEGIN_DATE),1,4)||substr(char(b.CYCLE_BEGIN_DATE),6,2)= '''||upper(char(v_cycle_str))||''' ) where Transfer_id='||char(in_Transfer_id);
                      set state='汇总acct_item数据 ';
                      call ipd.sp_exec_dsql(v_sql_str,o_err_no);
                      if  o_err_no <> 0 
                         then
                             update ipd.transfer_task
                             set   deal_flag=-1
                             where transfer_id=in_transfer_id;
                             set o_err_no=1;
                             set o_err_msg=state||char(in_TRANS_TYPE_id)||'传送出错！';
                         return 0;
                      end if; 
                      --整理表空间。
                      call ipd.bi_settle_tablespace(in_Transfer_id,
                                 o_err_no,
                                 o_err_msg);--调用此过程，检测表空间
                        --返回值不为0，则不执行返回
                      set state='为acct_item整理表空间';
                       if o_err_no<>0 
                         then
                             update ipd.TRANSFER_TASK
                             set    DEAL_FLAG=-1
                             where  Transfer_id=in_Transfer_id;
                             set o_err_msg=state||'任务号'||char(in_TRANS_TYPE_id)||'传送出错！SQLCODE:'||char(o_err_no);
                             set   o_err_no=1;       
                             commit;
                             return 0;
                         end if;
                      --在任务表中将状态改为1，准备传送数据.
                      update ipd.TRANSFER_TASK
                      set    DEAL_FLAG=1
                      where  Transfer_id=in_Transfer_id;
                      commit;
                      set v_sql_str='create table ipd.'||in_TRANSFER_name||' like ADMINISTRATOR.ACCT_item)';
                      call ipd.sp_exec_dsql(v_sql_str,o_err_no);
                      set stmt='inset into ipd.'||in_TRANSFER_name||'  select  ACCT_ITEM_ID,SERV_ID,SERV_SEQ_NBR,EXT_SERV_ID, ACCT_ID,ACCT_SEQ_NBR,ACCT_ITEM_TYPE_ID,CHARGE,BILLING_CYCLE_ID,CREATED_DATE,PARTNER_ID,BILL_SERIAL_NBR,STATE,STATE_DATE, EXCHANGE_ID, PAYMENT_METHOD from ADMINISTRATOR.acct_item  where billing_cycle_id like  '''||upper(v_cycle_str)||'''';
                      call ipd.sp_exec_dsql(stmt,o_err_no);
                      set state='插入数据到ipd.'||in_TRANSFER_name;
                      if  o_err_no = 0 
                        then
                            update  transfer_task
                            set     deal_flag=2
                            where   transfer_id=in_transfer_id;
                            set o_err_no=0;
                        else
                            update transfer_task
                            set    deal_flag=-1
                            where  transfer_id=in_transfer_id;
                            set   o_err_msg=state||'任务号'||char(in_TRANS_TYPE_id)||'传送出错！SQLCODE:'||char(o_err_no);
                            set   o_err_no=1; 
                     end if ;
                    commit;
             end if;--下帐数据完毕
         end  if;
         set temp_int=0;
         call ipd.bi_check(in_transfer_id,
              in_transfer_name,
              temp_int,
              o_err_no,
              o_err_msg);
END P1