Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1n09R3-0002Rl-QR for pgsql-docs@arkaria.postgresql.org; Wed, 22 Dec 2021 21:46:09 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1n09R2-00072T-Ee for pgsql-docs@arkaria.postgresql.org; Wed, 22 Dec 2021 21:46:08 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1n09R2-00072I-7X for pgsql-docs@lists.postgresql.org; Wed, 22 Dec 2021 21:46:08 +0000 Received: from momjian.us ([72.94.173.45]) by magus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1n09Qv-0005Fg-FW for pgsql-docs@lists.postgresql.org; Wed, 22 Dec 2021 21:46:07 +0000 Received: from bruce by momjian.us with local (Exim 4.92) (envelope-from ) id 1n09Qt-0001Sw-05; Wed, 22 Dec 2021 16:45:59 -0500 Date: Wed, 22 Dec 2021 16:45:58 -0500 From: Bruce Momjian To: "David G. Johnston" Cc: Chris Lowder , Pg Docs Subject: Re: 11.7. Indexes on Expressions Message-ID: <20211222214558.GB4015@momjian.us> References: <20211216205232.GA30462@momjian.us> <20211217214343.GC5592@momjian.us> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk On Wed, Dec 22, 2021 at 02:40:12PM -0700, David G. Johnston wrote: > On Fri, Dec 17, 2021 at 2:43 PM Bruce Momjian wrote: > > I am attaching an updated patch which mentions non-HOT updates for > expression indexes. > > > Thanks.  I'm a bit concerned that before this patch the only place we mentioned > HOTin the docs is in the appendix acronym listing which points to the readme > file in the source code. Uh, I had a similar concern and found these cases: monitoring.sgml: Number of rows updated (includes HOT updated rows) monitoring.sgml: Number of rows HOT updated (i.e., with no separate index Not sure what else we can do --- it would be odd to explain it in the expression index docs. -- Bruce Momjian https://momjian.us EDB https://enterprisedb.com If only the physical world exists, free will is an illusion.