| From: | Alexander Korotkov <aekorotkov(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Richard Guo <guofenglinux(at)gmail(dot)com>, Andrei Lepikhov <a(dot)lepikhov(at)postgrespro(dot)ru>, Vik Fearing <vik(at)postgresfriends(dot)org>, zuming(dot)jiang(at)inf(dot)ethz(dot)ch, pgsql-bugs(at)lists(dot)postgresql(dot)org, Alexander Korotkov <akorotkov(at)postgresql(dot)org> |
| Subject: | Re: BUG #18170: Unexpected error: no relation entry for relid 3 |
| Date: | 2023-10-27 21:12:02 |
| Message-ID: | CAPpHfdtU4Y=H-0MGHy6EzDvniSda46wG+_osh-2w5JWbnDZY0w@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Fri, Oct 27, 2023 at 5:41 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Richard Guo <guofenglinux(at)gmail(dot)com> writes:
> > Alternatively, can we look at subroot->parse->targetList instead of
> > subquery->targetList where we call estimate_num_groups on the output of
> > the subquery?
>
> Please read the comment just above that.
Thank you, Tom, This is clear.
Could you please comment on the second option by Andrei [1]? Was the
copying of the parse trees an intention of 2489d76 or just a side
effect? Do you think removing copying of trees is safe?
Links
1. https://www.postgresql.org/message-id/2eb87c2e-7e6f-4002-8df3-8fac3aa6a037%40postgrespro.ru
------
Regards,
Alexander Korotkov
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