Re: PL/Python error checking

Поиск
Список
Период
Сортировка
От Bruce Momjian
Тема Re: PL/Python error checking
Дата
Msg-id 200507100457.j6A4v2E09078@candle.pha.pa.us
обсуждение исходный текст
Ответ на PL/Python error checking  (Michael Fuhr <mike@fuhr.org>)
Список pgsql-patches
Patch applied.  Thanks.

---------------------------------------------------------------------------


Michael Fuhr wrote:
> This patch addresses the problem mentioned in the "process crash
> when a plpython function returns unicode" thread:
>
> http://archives.postgresql.org/pgsql-bugs/2005-06/msg00105.php
>
> In several places PL/Python was calling PyObject_Str() and then
> PyString_AsString() without checking if the former had returned
> NULL to indicate an error.  PyString_AsString() doesn't expect a
> NULL argument, so passing one causes a segmentation fault.  This
> patch adds checks for NULL and raises errors via PLy_elog(), which
> prints details of the underlying Python exception.  The patch also
> adds regression tests for these checks.  All tests pass on my
> Solaris 9 box running HEAD and Python 2.4.1.
>
> In one place the patch doesn't call PLy_elog() because that could
> cause infinite recursion; see the comment I added.  I'm not sure
> how to test that particular case or whether it's even possible to
> get an error there: the value that the code should check is the
> Python exception type, so I wonder if a NULL value "shouldn't
> happen."  This patch converts NULL to "Unknown Exception" but I
> wonder if an Assert() would be appropriate.
>
> The patch is against HEAD but the same changes should be applied
> to earlier versions because they have the same problem.  The patch
> might not apply cleanly against earlier versions -- will the committer
> take care of little differences or should I submit different versions
> of the patch?
>
> --
> Michael Fuhr
> http://www.fuhr.org/~mfuhr/

[ Attachment, skipping... ]

>
> ---------------------------(end of broadcast)---------------------------
> TIP 1: subscribe and unsubscribe commands go to majordomo@postgresql.org

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

В списке pgsql-patches по дате отправления:

Предыдущее
От: Bruce Momjian
Дата:
Сообщение: Re: regexp_replace
Следующее
От: Bruce Momjian
Дата:
Сообщение: Re: PL/Python error checking