| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: TupleDescAttr bounds checks |
| Date: | 2026-03-20 17:02:35 |
| Message-ID: | CA+TgmoYpi48MV1RoqkLpwSg5b-ySYJ6Vx5yXjOS3hS6oJWwtzw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Mar 20, 2026 at 12:46 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> I did see that, but it read to me that you were just guessing at that
> time. This morning I put Asserts into indexcmds.c that verified that
> it was trying to access the tupledesc for attno zero, and that proves
> there is a bug there. It also seems like a plausible explanation for
> why only one machine has exhibited the failure. (Your 0002 is a
> better version of said Asserts.)
Ah, OK. Yeah, I wasn't completely sure at the time whether there was
some kind of TupleDesc out there that would allow zero or negative
indexes safely. It seems like there is not.
--
Robert Haas
EDB: http://www.enterprisedb.com
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