Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1rSMNf-00DGen-Df for pgsql-bugs@arkaria.postgresql.org; Tue, 23 Jan 2024 19:24:20 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.94.2) (envelope-from ) id 1rSMNe-00FpPV-Cg for pgsql-bugs@arkaria.postgresql.org; Tue, 23 Jan 2024 19:24:18 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1rSMNd-00FpPI-TT for pgsql-bugs@lists.postgresql.org; Tue, 23 Jan 2024 19:24:18 +0000 Received: from mail.postgrespro.ru ([93.174.131.139]) by magus.postgresql.org with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1rSMNa-003Ldk-7F for pgsql-bugs@postgresql.org; Tue, 23 Jan 2024 19:24:17 +0000 Received: from [172.30.9.138] (unknown [172.30.9.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) (Authenticated sender: m.zhilin@postgrespro.ru) by mail.postgrespro.ru (Postfix/587) with ESMTPSA id 3D029E20E3F; Tue, 23 Jan 2024 22:24:12 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=postgrespro.ru; s=mx2023; t=1706037852; bh=5FadJ3VM179vkw9ut9gDFD+TZGVAcKyHYnrzhPZSzZc=; h=Message-ID:Date:User-Agent:Subject:To:Cc:References:From: In-Reply-To:From; b=4Vq+BWe2V0Oo/SGFHmUzQu2fOVYHZj4iHHoFDgaRmt28d3n20GiyLy+GjpUzTucjW I2i+xjzWiKqKnQgKSVdoJ3TLYbk4Z92u3zJ2yY0Z8flecdia6MjZo5imnumB87EIn7 GtBLE7IFED7AE/JinsM1Agt2xnkU2fznrJEzS52nzEWlpdobi2sADqmF1ZxXNhu2CK 9ANXBDLy2YYmcVApxZKgJ3NZuIhFdf0DkjPCW9fPFqxwKXmBpMA63vsWbLk4Mk21r/ OvNLIqvcVm/txFZ8gcMsH6vPuI3xjqz1Rx3RwCwLzbMmgTsVl8i9yFH9I9Otw4XiHt n1aRziHP+4q0w== Content-Type: multipart/mixed; boundary="------------wkXmReYidHqn39fHaSVvYhmb" Message-ID: <68d87456-634d-44dc-b2ae-077f3601f71e@postgrespro.ru> Date: Tue, 23 Jan 2024 22:24:11 +0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [BUG] false positive in bt_index_check in case of short 4B varlena datum Content-Language: en-US To: "Andrey M. Borodin" , Alexander Lakhin , jian.universality@gmail.com Cc: pgsql-bugs@postgresql.org, Yura Sokolov References: <7bdbe559-d61a-4ae4-a6e1-48abdf3024cc@postgrespro.ru> <0FDE2089-D306-4CBB-AD1F-EC4B419E3B33@yandex-team.ru> <49BBA065-4C9A-4E50-9048-B457907FF219@yandex-team.ru> <76bc0dc9-4e43-4cd8-8eec-249b254ed1c9@postgrespro.ru> <8C83FCCA-2548-499A-8B1C-96C3D8ADB787@yandex-team.ru> From: Michael Zhilin In-Reply-To: X-Virus-Scanned: clamav-milter 0.100.3 at postfix X-Virus-Status: Clean List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk This is a multi-part message in MIME format. --------------wkXmReYidHqn39fHaSVvYhmb Content-Type: multipart/alternative; boundary="------------lIeuh0j1cnR0UUPN7xKpZIRr" --------------lIeuh0j1cnR0UUPN7xKpZIRr Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi, Thank you, Jian, for nice comments! PFA version with your recommendations. Andrey, I didn't yet check your patches, but at least compiler complains about added, but unused variable "miss_oversized_tuple". verify_nbtree.c:2898:7: warning: unused variable 'miss_oversized_tuple' [-Wunused-variable]         bool miss_oversized_tuple = false; So patch has been updated to fix this warning. Attached v4, rebased version with Jian's comments & removed unused variable. Thanks,  Michael. On 1/23/24 21:09, Andrey M. Borodin wrote: > >> On 20 Jan 2024, at 09:00, Alexander Lakhin wrote: >> >>> Alexander, do you plan to provide fixes for bugs you discovered? >> No, I don't have a concrete proposal how to fix those bugs. I'd thought >> that fixing the whole class of such anomalies, not only one case, is a good >> thing to do, but if it's too complicated, maybe other similar bugs could be >> put aside. > PFA draft fixes for both this errors. Alexander, Michael, Jian, what do you think? > > I did not touch anything in first step - fix for original bug in this thread. However, I think that comments from Jian He worth incorporating into the fix. > > > Best regards, Andrey Borodin. > -- Michael Zhilin Postgres Professional +7(925)3366270 https://www.postgrespro.ru --------------lIeuh0j1cnR0UUPN7xKpZIRr Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi,

Thank you, Jian, for nice comments!
PFA version with your recommendations.

Andrey,
I didn't yet check your patches, but at least compiler complains about added, but unused variable "miss_oversized_tuple".

verify_nbtree.c:2898:7: warning: unused variable 'miss_oversized_tuple' [-Wunused-variable]
        bool miss_oversized_tuple = false;

So patch has been updated to fix this warning.

Attached v4, rebased version with Jian's comments & removed unused variable.

Thanks,
 Michael.

On 1/23/24 21:09, Andrey M. Borodin wrote:


On 20 Jan 2024, at 09:00, Alexander Lakhin <exclusion@gmail.com> wrote:


Alexander, do you plan to provide fixes for bugs you discovered?

No, I don't have a concrete proposal how to fix those bugs. I'd thought
that fixing the whole class of such anomalies, not only one case, is a good
thing to do, but if it's too complicated, maybe other similar bugs could be
put aside.

PFA draft fixes for both this errors. Alexander, Michael, Jian, what do you think?

I did not touch anything in first step - fix for original bug in this thread. However, I think that comments from Jian He worth incorporating into the fix.


Best regards, Andrey Borodin.



-- 
Michael Zhilin
Postgres Professional
+7(925)3366270
https://www.postgrespro.ru
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