oracle 行轉列數據量太大報錯

wmsys.wm_concat  這個函數存在缺陷，數據量大的時候，容易報ora-22813

    沒辦法只能通過重新定義一個行轉列函數，copy了一下 http://www.savedba.com/?p=955  這個人寫的函數

有點問題，自己又改了下。

drop type t_dj_concat;
drop function dj_concat;


create or replace type t_dj_concat  as object
(
  curr_str clob,
  static function odciaggregateinitialize(sctx in out t_dj_concat)
    return number,
  member function odciaggregateiterate(self in out t_dj_concat,
                                       p1   in varchar2) return number,
  member function odciaggregateterminate(self        in t_dj_concat,
                                         returnvalue out clob,
                                         flags       in number)
    return number,
  member function odciaggregatemerge(self  in out t_dj_concat,
                                     sctx2 in t_dj_concat) return number
);
/




create or replace type body t_dj_concat
is
  static function odciaggregateinitialize(sctx in out t_dj_concat)
  return number
  is
  begin
  sctx := t_dj_concat(null) ;
  return odciconst.success;
  end;
  member function odciaggregateiterate(self in out t_dj_concat,


  p1 in varchar2)
  return number
  is
  begin
  if(curr_str is not null) then
  curr_str := curr_str || ',' || p1;
  else
  curr_str := p1;
  end if;
  return odciconst.success;
  end;
  member function odciaggregateterminate(self in t_dj_concat,
  returnvalue out clob,
  flags in number)
  return number
  is
  begin
  returnvalue := curr_str ;
  return odciconst.success;
  end;
  member function odciaggregatemerge(self in out t_dj_concat,
  sctx2 in t_dj_concat)
  return number
  is
  begin
  if(sctx2.curr_str is not null) then
  self.curr_str := self.curr_str || ',' || sctx2.curr_str ;
  end if;
  return odciconst.success;
  end;
end;
/






create or replace function dj_concat(p1 varchar2)
return clob aggregate using t_dj_concat ;
/

然後測試完美解決

 sb.append(" select  rptcode,infcode,rowcode,colcode,nullable,infname,dj_concat(infvalue) as infvalue  from  CCISDIC    group ");
       sb.append(" by rptcode,infcode,rowcode,colcode,nullable,infname ");
       return this.getJdbcService().findForList(sb.toString(),new Object[]{});

 String value=map.get("infvalue").toString();