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Re: pg17: XX000: no relation entry for relid 0

Richard Guo <guofenglinux@gmail.com>

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From: Richard Guo <guofenglinux@gmail.com>
To: Tender Wang <tndrwang@gmail.com>
Cc: Justin Pryzby <pryzby@telsasoft.com>, pgsql-hackers@lists.postgresql.org, Paul Jungwirth <pj@illuminatedcomputing.com>, Tom Lane <tgl@sss.pgh.pa.us>, Michael Paquier <michael@paquier.xyz>
Date: 2026-04-11T07:57:21Z
Lists: pgsql-hackers 
On Sat, Apr 11, 2026 at 10:32 AM Tender Wang <tndrwang@gmail.com> wrote:
> Richard Guo <guofenglinux@gmail.com> 于2026年4月10日周五 22:39写道：
> > This looks like the right fix to me.  We can use some comment here.

> comments added.
> Please see the attached patch.

I've pushed and back-patched the fix after some tweaks to the comment
and commit message.  I also used explain (verbose, costs off) in the
test case so that we can observe that the inner UNION ALL's output
type doesn't match the outer's.

Thanks for the report and the patch.

- Richard

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Fix estimate_array_length error with set-operation array coercions