9

我有一个用 PDF 文档填充 BLOB 变量的过程。我要做的是添加逻辑以仅在静态日期后的 60 天内显示 PDF 文档。见下文:

check_staticdate     number(1); 

function DisplayPDF (audit in number) RETURN blob is

person_id     person.person_id%type;
z_lob         blob;
blob_length   NUMBER;


CURSOR getPDF(audit number) IS
   select report
   from report_table
   where report_type = 'PDF'
   and job_no = audit order by rec_no;


begin

/* Check Valid ID */
if not package.ValidID(person_id, check_only=>TRUE) then
   return z_lob;
end if;


/* Here is the case statement.*/
select case
   when exists
      (
       SELECT 'x' from table
       where table_id = person_id
       and trunc(sysdate) < trunc(table_static_date + 60)
      )

    then 1
    else 0
   end into check_staticdate
from dual;


if (check_staticdate = 0) then
   return z_lob;
end if;



open getPDF(audit);
fetch getPDF into z_lob;
close getPDF;
return z_lob;


end DisplayPDF;

我收到的错误是:ORA-22275: invalid LOB locator specified.

我是 Oracle SQL 的新手,我不确定为什么我的 ValidID 检查通过返回 z_lob 起作用,但我的 case 语句却没有。

编辑:添加完整的错误堆栈

Failed to execute target procedure ORA-22275: invalid LOB locator specified

ORA-06512: at "SYS.WPG_DOCLOAD", line 51

ORA-06512: at "User.Package", line 733

ORA-06512: at line 33
4

2 回答 2

21

首先用临时初始化你的 lob

DBMS_LOB.CREATETEMPORARY(z_lob,true); --true if you want it to be cached.
于 2014-02-26T06:44:51.950 回答
1

您的函数可能会返回(取决于您的audit参数值)一个带有 NULL 值的 blob 到SYS.WPG_DOCLOAD抛出您看到的未处理异常的方法。

也许你可以修改你return z_lob;return nvl(z_lob, empty_blob());

于 2013-04-06T00:21:35.923 回答