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 4.96) (envelope-from ) id 1vcu16-00ByXq-0P for pgsql-hackers@arkaria.postgresql.org; Mon, 05 Jan 2026 23:29:41 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.96) (envelope-from ) id 1vcu14-004tdO-3C for pgsql-hackers@arkaria.postgresql.org; Mon, 05 Jan 2026 23:29:39 +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 4.96) (envelope-from ) id 1vctyC-004q3K-1F for pgsql-hackers@lists.postgresql.org; Mon, 05 Jan 2026 23:26:41 +0000 Received: from meldrar.postgresql.org ([2a02:c0:301:0:ffff::31]) by magus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vctyA-004ldD-0s for pgsql-hackers@postgresql.org; Mon, 05 Jan 2026 23:26:40 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=postgresql.org; s=20171124; h=Content-Transfer-Encoding:Content-Type: Mime-Version:References:In-Reply-To:From:Subject:Cc:To:Message-Id:Date:Sender :Reply-To:Content-ID:Content-Description; bh=NdHzFmsnWX+nMgNZ4m6wDV/Q8sQQQCa0TbhLKRpLMLw=; b=Z0+q4l+F5dGkzHU+ByJRIgiuXR MqgXv+yJURdN+oQBbP3aWD7N49kJvodbLSC/LgMAWSGu3AKzVaiYBMtkvItm1jGPSk3IdAB9uvyWn yGzMTy9Wxpa17mV/49IkYQmCEnRJKEEQC+dbBZWOR+M0mOU/HMUhp4PiFHXI5pPsgdqd14HB5BQot t5Ha5ozUE6+OR7TgBbCIr2aKVnVrJrF30cSeBg/qEuKEjEgxJ3EW/QNlKqdKJzVNtf8TiVdMPga+2 rxJLD6Q3+Y47H5YOm2nnGzxvZ0TAZ5w2mmTxRrTiYaVQmOP/H6pBgzwJwfXD2but0ltNU8taO7D2r gIp2xyEA==; Received: from [2409:11:4120:300:ead8:5ce8:950c:74b4] (helo=localhost) by meldrar.postgresql.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vcty3-009cvS-0z; Mon, 05 Jan 2026 23:26:33 +0000 Date: Tue, 06 Jan 2026 08:26:15 +0900 (JST) Message-Id: <20260106.082615.727870658299152115.ishii@postgresql.org> To: jacob.champion@enterprisedb.com Cc: assam258@gmail.com, david.g.johnston@gmail.com, vik@postgresfriends.org, er@xs4all.nl, peter@eisentraut.org, pgsql-hackers@postgresql.org Subject: Re: Row pattern recognition From: Tatsuo Ishii In-Reply-To: References: <20250924.193523.694296225366690354.ishii@postgresql.org> X-Mailer: Mew version 6.8 on Emacs 29.3 Mime-Version: 1.0 Content-Type: Text/Plain; charset=utf-8 Content-Transfer-Encoding: base64 X-Host-Lookup-Failed: Reverse DNS lookup failed for 2409:11:4120:300:ead8:5ce8:950c:74b4 (failed) List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk PiBPbiBTdW4sIEphbiA0LCAyMDI2IGF0IDc6NTDigK9BTSBIZW5zb24gQ2hvaSA8YXNzYW0yNThA Z21haWwuY29tPiB3cm90ZToNCj4+IEkndmUgYmVlbiB3b3JraW5nIG9uIGFuIE5GQSBpbXBsZW1l bnRhdGlvbiBwcm90b3R5cGUuDQo+IA0KPiBOZWF0ISBJbiBjYXNlIGl0IGhlbHBzLCB5b3UgbWF5 IGFsc28gYmUgaW50ZXJlc3RlZCBpbiBteSAobm93IHZlcnkgb3V0DQo+IG9mIGRhdGUpIG1haWxz IGF0IFsxXSBhbmQgWzJdLg0KPiANCj4gQXQgb25lIHBvaW50IEkgd2FzIGFsc28gd29ya2luZyBv biBhbiBpbmRlcGVuZGVudCBpbXBsZW1lbnRhdGlvbiBvZg0KPiB0aGUgcHJlZmVybWVudCBydWxl cywgdG8gbWFrZSBpdCBlYXNpZXIgZm9yIGRldmVsb3BlcnMgdG8gaW50dWl0IGhvdw0KPiBtYXRj aGVzIHdlcmUgbWFkZSwgYnV0IEkgY2FuJ3QgZmluZCB0aGF0IGVtYWlsIGF0IHRoZSBtb21lbnQu DQoNCk1heWJlIHRoaXM/DQoNCmh0dHBzOi8vd3d3LnBvc3RncmVzcWwub3JnL21lc3NhZ2UtaWQv Q0FPWW1pJTJCbnMza0hqQzgzYXBfQkNmSkNMMHdmTzVCSl9zRUJ5T0VwZ05PcnNQaHFRVGclNDBt YWlsLmdtYWlsLmNvbQ0KDQpCZXN0IHJlZ2FyZHMsDQotLQ0KVGF0c3VvIElzaGlpDQpTUkEgT1NT IEsuSy4NCkVuZ2xpc2g6IGh0dHA6Ly93d3cuc3Jhb3NzLmNvLmpwL2luZGV4X2VuLw0KSmFwYW5l c2U6aHR0cDovL3d3dy5zcmFvc3MuY28uanANCg==