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 1tg3QH-007KbB-Iw for pgsql-hackers@arkaria.postgresql.org; Thu, 06 Feb 2025 15:04:10 +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 1tg3QG-008S6v-M4 for pgsql-hackers@arkaria.postgresql.org; Thu, 06 Feb 2025 15:04:08 +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 1tg3QG-008S6d-Cl for pgsql-hackers@lists.postgresql.org; Thu, 06 Feb 2025 15:04:08 +0000 Received: from mail-pj1-x1041.google.com ([2607:f8b0:4864:20::1041]) by magus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.96) (envelope-from ) id 1tg3QD-003y3E-1r for pgsql-hackers@lists.postgresql.org; Thu, 06 Feb 2025 15:04:08 +0000 Received: by mail-pj1-x1041.google.com with SMTP id 98e67ed59e1d1-2f9bed1f521so1508206a91.3 for ; Thu, 06 Feb 2025 07:04:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1738854244; x=1739459044; darn=lists.postgresql.org; h=mime-version:subject:references:in-reply-to:message-id:cc:to:from :date:from:to:cc:subject:date:message-id:reply-to; bh=0zEi3SLXghQYpuU9aScgY4i6LKXA0jrp39kToq/OBxI=; b=RrSRAmRyMHk/3QoDS00t4CJXabfM45HLERbeaf6Fn1HbkpS+Ik2YmOx3UB6rXhpF5R hiOq25XZCLTCE1NvgSjoXJ6crFovL9f30sT28CtHzgW3xD1ruXkrbhPyq4xMw4MaI3kM AKzs3Iy8HXA23rvzV+i5/w2SdvCPCScRRdAscTaMPdfk0g+9LFhtWXaY8mDM/UaAA/Xp kPhqv4ONoWw++9qiLLVjnG1TMhU4m59zZNV0wt0XiaZ8S0xllWRoiKUkySRLmDEHGOBd 7JCsLLTrQ3l3Mku8IaMujOtrM6bcI1peXoMOf3b/iTNBSVRJKg6wu7DblkfHo2Ku97B9 DX+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738854244; x=1739459044; h=mime-version:subject:references:in-reply-to:message-id:cc:to:from :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=0zEi3SLXghQYpuU9aScgY4i6LKXA0jrp39kToq/OBxI=; b=DwFDq4Cx/utk8lYUkxP/mroLYGEy93eEHiZ9IW9wQwFbjvAf1FZzsRGHxmGR5Ds5pE 3h2GkkNEtUHA2NJzW+p2P/ZZQOUjGXoRRGkgYGOHZr0yqpfuF1kwmilyYtBkl+xP0gyO G18KuqE+70+D4yupNUBOcll63pvolO+3y86KO8xQFDdCbG+qzpI49MvFuNvi5q7Gpn8Z 6yaLnfbUDx9NvrqyKs5WxY5Jq+43wORzu2URyd8In1nK0VqlTCqdZ9MtiPqcA3Id0Gmn /p2STCdQyF/v8sVA5wl6+h/seviYl5SxRuyU70zXur+fy3HngDRtZkYHIiCTbfrerjjs PLAw== X-Gm-Message-State: AOJu0YwIASqjjQY/Cod8BYCC+gtzSlxmXkZxRLV9r55FOeVSyQBDXvca yFEDsx9GBzxArmrCU05Rlry2K9yN9cBXsdP7qD9uWVcEAsYfZvlm X-Gm-Gg: ASbGnctKSVJPG1rAucmrOvJbDDUuDsi3ZErQhV4WOyzf4vrJIaP2r23fyrSvwzXlLdl fex6f4hVtkH+uTnK0Yg68SWmIyWhk6ceW7mHzNBfHCzSlT7NxdJvDhpas4uaamSh/vzogu8Xh0H drPVuhKOpiB4d/H0MJLQXDuGUMplEzktfiB1BdbH/Ud2yZtLzAw6335LQdD/Pa5FV7tUxq6LCoO qwAe3LzX438dd7OcneB2mYh+hiDCPaDqhaf3DIAwCeztRnO9ZhuC2qOqnLdU8n123+dd5T8bzQw XffdwFLiAw== X-Google-Smtp-Source: AGHT+IGFJFqpxEtojfwKzlx2/NgjD9vAWHjqbPU+hwox+zVsQhuw47XbsH6ItxGTMAvL3nwYt65D3Q== X-Received: by 2002:a17:90b:3696:b0:2ee:aa28:79aa with SMTP id 98e67ed59e1d1-2f9e074d16amr10442814a91.6.1738854243785; Thu, 06 Feb 2025 07:04:03 -0800 (PST) Received: from [127.0.0.1] ([2600:3c15::f03c:95ff:fe39:7c29]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2f9e1d77b5dsm3686592a91.17.2025.02.06.07.03.59 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 06 Feb 2025 07:04:03 -0800 (PST) Date: Thu, 6 Feb 2025 23:03:50 +0800 From: Zhang Mingli To: "David G. Johnston" Cc: PostgreSQL Hackers Message-ID: In-Reply-To: References: <6ffeeead-0b17-487d-860b-11cc8f18a3aa@Spark> Subject: Re: Improve documentation regarding custom settings, placeholders, and the administrative functions X-Readdle-Message-ID: a8ca923a-5659-4b5a-b999-271dc4889a83@Spark MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="67a4cf5b_14d9d2fd_1738b" List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --67a4cf5b_14d9d2fd_1738b Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On =46eb 6, 2025 at 10:49 +0800, David G. Johnston , wrote: > > Yes, and when it does it is doing so in lieu of an error,=C2=A0and thus= it is not returning the value=C2=A0of the setting.=C2=A0=C2=A0It does no= t mean the value taken on by the named parameter is NULL, which is not po= ssible. i.e., SHOW will never produce NULL. Hi, OK, LGTM. -- Zhang Mingli HashData --67a4cf5b_14d9d2fd_1738b Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
On =46eb 6, 2025 at 10:49 +0800, David G. Johnston = <david.g.johnston=40gmail.com>, wrote:

Yes, and whe= n it does it is doing so in lieu of an error,&=23160;and thus it is not r= eturning the value&=23160;of the setting.&=23160;&=23160;It does not mean= the value taken on by the named parameter is NULL, which is not possible= . i.e., SHOW will never produce NULL.
Hi,

OK, LGTM.

--
Zhang Mingli
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