Horton

Re: BUG #19435: Error: "No relation entry for relid 2" Triggered by Complex Join with Self-Referencing Tables

Andrei Lepikhov <lepihov@gmail.com>

View thread View on postgr.es
From: Andrei Lepikhov <lepihov@gmail.com>
To: Alexander Korotkov <aekorotkov@gmail.com>
Cc: Tender Wang <tndrwang@gmail.com>, Kirill Reshke <reshkekirill@gmail.com>, Fujii Masao <masao.fujii@gmail.com>, ammmkilo@163.com, pgsql-bugs@lists.postgresql.org
Date: 2026-03-18T13:31:00Z
Lists: pgsql-bugs

Attachments

On 18/3/26 13:21, Alexander Korotkov wrote:
> On Wed, Mar 18, 2026 at 2:18 PM Andrei Lepikhov <lepihov@gmail.com> wrote:
>> What is the reason for the second change? Tender, can you show us how to
>> reproduce the issue so we can support your update to
>> restrict_infos_logically_equal? If we include it, we should add a test.
> 
> I think Tender already shown this in [1].  The same qual is present
> twice in the plan.
Got it. I suggest making this a separate commit to keep the history 
clear. Let me share a draft with a test case for the bug fix first.

-- 
regards, Andrei Lepikhov,
pgEdge

Commits

  1. Further improve commentary about ChangeVarNodesWalkExpression()

  2. Improve commentary about ChangeVarNodesWalkExpression().

  3. Fix self-join removal to update bare Var references in join clauses

  4. Implement Self-Join Elimination