oracle 错误解决 ORA-06502

ORA-06502: PL/SQL: numeric or value error错误解决

    当执行如下语句时出现“06502数字或值错误”，func_fa_getunororgpath函数主要是将人员组织ID参数转换为人员名称、组织 PATH。

select  func_fa_getunororgpath(pc.personorgselect)  from  tbl_pt_createtask pc  where  pc.orderid= '2-090210-008-096'

select func_fa_getunororgpath(pc.personorgselect) from tbl_pt_createtask pc where pc.orderid='2-090210-008-096'

    查看函数得知该函数返回VARCHAR2（4000）类型，函数代码如下：

create   or   replace   function  func_fa_getUNorOrgPath(idOrPath  in  varchar2)  return  string  is
   Result varchar2(4000);
   urserOrOrgId varchar2(2000);
begin
   urserOrOrgId:=idOrPath;
  while urserOrOrgId is   not   null  loop
       ……  ……
       ……  ……
      if tmpStr is   null   then
          Result:=Result ||tmpId ||';' ;
     else
          Result:=Result ||tmpStr ||';' ;
     end  if;
  end  loop;
  return (substr(Result,0,length(Result)-1));
end  func_fa_getUNorOrgPath;

create or replace function func_fa_getUNorOrgPath(idOrPath in varchar2) return string is
   Result varchar2(4000);
   urserOrOrgId varchar2(2000);
begin
   urserOrOrgId:=idOrPath;
  while urserOrOrgId is not null loop
       ……  ……
       ……  ……
      if tmpStr is null then
          Result:=Result ||tmpId ||';';
     else
          Result:=Result ||tmpStr ||';';      
     end if;       
  end loop;
  return(substr(Result,0,length(Result)-1));
end func_fa_getUNorOrgPath;

    当Result长度超过4000时，再执行Result:=Result ||tmpStr ||';';时即出现该错误，固改为返回CLOB类型，代码如下：

create   or   replace   function  func_fa_getUNorOrgPath(idOrPath  in  varchar2)  return  CLOB  is
   Result CLOB;
   urserOrOrgId varchar2(2000);
   urserOrOrgId:=idOrPath;
begin
  if idOrPath is   null   then
     return  empty_clob();
  end  if;
  DBMS_LOB.CREATETEMPORARY(Result, TRUE );
  while urserOrOrgId is   not   null  loop
       ……  ……
        if tmpStr is   null   then
            DBMS_LOB.writeappend(Result,LENGTH(tmpId),tmpId);
            DBMS_LOB.writeappend(Result,LENGTH(';' ), ';' );
        else
            DBMS_LOB.writeappend(Result,LENGTH(tmpStr),tmpStr);
            DBMS_LOB.writeappend(Result,LENGTH(';' ), ';' );
        end  if;
  end  loop;
  return (substr(Result,0,length(Result)-1));
end  func_fa_getUNorOrgPath;

create or replace function func_fa_getUNorOrgPath(idOrPath in varchar2) return CLOB is
   Result CLOB;
   urserOrOrgId varchar2(2000);
   urserOrOrgId:=idOrPath;
begin
  if idOrPath is null then
     return empty_clob();  
  end if;
  DBMS_LOB.CREATETEMPORARY(Result, TRUE); 
  while urserOrOrgId is not null loop
       ……  ……
        if tmpStr is null then
            DBMS_LOB.writeappend(Result,LENGTH(tmpId),tmpId);
            DBMS_LOB.writeappend(Result,LENGTH(';'),';');
        else
            DBMS_LOB.writeappend(Result,LENGTH(tmpStr),tmpStr);
            DBMS_LOB.writeappend(Result,LENGTH(';'),';');
        end if;  
  end loop;
  return(substr(Result,0,length(Result)-1));
end func_fa_getUNorOrgPath;

    但在java中读取数据时需要采用Stream进行读取