Date: Wed, 18 Aug 2021 07:51:19 -0400
From: Bruce Momjian <bruce@momjian.us>
To: 253540651@qq.com, pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #17151: A SEGV in optimizer
Message-ID: <20210818115119.GA13002@momjian.us>
References: <17151-c03a3e6e4ec9aadb@postgresql.org>
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On Wed, Aug 18, 2021 at 02:53:07AM +0000, PG Bug reporting form wrote:
> The following bug has been logged on the website:
> 
> Bug reference:      17151
> Logged by:          Zhiyong Wu
> Email address:      253540651@qq.com
> PostgreSQL version: 14beta2
> Operating system:   Linux version 5.13.0-1-MANJARO (builduser@LEGION)
> Description:        
> 
> PoC:
> CREATE TEMPORARY TABLE v0 ( v1 INTEGER ) ;
>  CREATE RULE v1 AS ON DELETE TO v0 DO INSERT INTO v0 SELECT OFFSET - - - -1
> FOR UPDATE FOR UPDATE FOR SHARE FOR UPDATE FOR SHARE FOR SHARE ;
>  ;
>  DELETE FROM v0 ;
>  ALTER TABLE v0 ADD UNIQUE ( v1 ) ;
>  ;

I can confirm this failure on git master.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  If only the physical world exists, free will is an illusion.