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 1kc9k4-00056m-Vj for pgsql-docs@arkaria.postgresql.org; Mon, 09 Nov 2020 16:10:04 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1kc9k3-0007fq-U4 for pgsql-docs@arkaria.postgresql.org; Mon, 09 Nov 2020 16:10:03 +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 1kc9k3-0007fO-Ol for pgsql-docs@lists.postgresql.org; Mon, 09 Nov 2020 16:10:03 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by magus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kc9k1-0003Is-NB for pgsql-docs@lists.postgresql.org; Mon, 09 Nov 2020 16:10:03 +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 0A9G9xe31984018; Mon, 9 Nov 2020 11:09:59 -0500 From: Tom Lane To: vadym.feskin@gmail.com cc: pgsql-docs@lists.postgresql.org Subject: Re: Addition to content In-reply-to: <160486028730.25500.15740897403028593550@wrigleys.postgresql.org> References: <160486028730.25500.15740897403028593550@wrigleys.postgresql.org> Comments: In-reply-to PG Doc comments form message dated "Sun, 08 Nov 2020 18:31:27 +0000" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <1984016.1604938199.1@sss.pgh.pa.us> Date: Mon, 09 Nov 2020 11:09:59 -0500 Message-ID: <1984017.1604938199@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk PG Doc comments form writes: > I would be helpful to add that NULLIF and COALESCE need to be of same data > type. That's not actually a correct statement ... which I guess just reinforces your point that the behavior needs to be documented. regards, tom lane