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 1w7L43-005CON-1N for pgsql-docs@arkaria.postgresql.org; Mon, 30 Mar 2026 22:26:31 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.96) (envelope-from ) id 1w7L41-006s8B-2v for pgsql-docs@arkaria.postgresql.org; Mon, 30 Mar 2026 22:26:30 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1w7L41-006s83-2A for pgsql-docs@lists.postgresql.org; Mon, 30 Mar 2026 22:26:30 +0000 Received: from sss.pgh.pa.us ([68.162.161.243]) by makus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1w7L40-00000001sKe-1QoL for pgsql-docs@lists.postgresql.org; Mon, 30 Mar 2026 22:26:29 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.15.2/8.15.2) with ESMTP id 62UMQQRk2584453; Mon, 30 Mar 2026 18:26:26 -0400 From: Tom Lane To: Paul A Jungwirth cc: pgsql-docs@lists.postgresql.org Subject: Re: cmax docs seem misleading In-reply-to: References: <1857026.1774813531@sss.pgh.pa.us> Comments: In-reply-to Paul A Jungwirth message dated "Sun, 29 Mar 2026 18:37:18 -0700" MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-ID: <2584451.1774909586.1@sss.pgh.pa.us> Content-Transfer-Encoding: 8bit Date: Mon, 30 Mar 2026 18:26:26 -0400 Message-ID: <2584452.1774909586@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk Paul A Jungwirth writes: > On Sun, Mar 29, 2026 at 12:45 PM Tom Lane wrote: >> Yeah, this is a mess. Nobody ever updated this text when we decided we >> could pack those fields into one. I think it would be better to do >> what you suggest: >>> ... And maybe we should be more drastic: combine cmin & >>> cmax into one entry, and explain that they are two names for the same >>> value, which might signify the insert cid, the delete cid, or a >>> combocid. > I agree that is plenty of detail for user-facing documentation. I > think your suggested text is a big improvement. Done like that, then. regards, tom lane