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 1pQAGM-0001HI-HO for pgsql-sql@arkaria.postgresql.org; Thu, 09 Feb 2023 16:59:10 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1pQAGK-0001sj-UM for pgsql-sql@arkaria.postgresql.org; Thu, 09 Feb 2023 16:59:08 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pQAGK-0001sa-81 for pgsql-sql@lists.postgresql.org; Thu, 09 Feb 2023 16:59:08 +0000 Received: from outbound.visena.net ([46.226.12.34]) by makus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pQAGH-0004ML-KY for pgsql-sql@lists.postgresql.org; Thu, 09 Feb 2023 16:59:07 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=visena.com; s=20141101.wh; h=Content-Type:MIME-Version:Subject:References:In-Reply-To: Message-ID:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=LTFYcRuHPmaszctFQ6nN0YX31pUN0OBm72ZQsGYgEBQ=; b=cbgKq3gRVhJdgijYM7xYvJ/0Ff nOB+0CZ63odRPf4gSs/5RalSsukhkOH7JBwdkC06MszYv70JtmsxbmqnvyOrMAjEy5MP6KJtApWqI bwWUf+QthpVim0HDcPfbjTg6QweMeeJkAi/nzKRrlulSkaPlJ0ACgekdU/LKl3fvbmGo=; Received: from batch01.services.internal.visena.net ([10.3.0.103]) by outbound.visena.net with utf8esmtp (Exim 4.93) (envelope-from ) id 1pQAGF-005uEa-T8; Thu, 09 Feb 2023 17:59:03 +0100 Date: Thu, 9 Feb 2023 17:59:03 +0100 (CET) From: Andreas Joseph Krogh To: "David G. Johnston" Cc: pgsql-sql@lists.postgresql.org Message-ID: In-Reply-To: References: Subject: Re: How to ensure a log-entry is created based on state of data in other tables MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_616371_1192255459.1675961943802" X-Mailer: Visena Mail 3.2.302 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk ------=_Part_616371_1192255459.1675961943802 Content-Type: multipart/related; boundary="----=_Part_616372_2058755362.1675961943802" ------=_Part_616372_2058755362.1675961943802 Content-Type: multipart/alternative; boundary="----=_Part_616373_941489540.1675961943821" ------=_Part_616373_941489540.1675961943821 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable P=C3=A5 torsdag 09. februar 2023 kl. 17:44:25, skrev David G. Johnston < david.g.johnston@gmail.com >: On Thu, Feb 9, 2023 at 12:24 AM Andreas Joseph Krogh > wrote: Is there a better way, using some extra tables to do bookkeeping can the ha= ve=20 constraints ensuring this business-requirement? Every time an activity newly becomes "Not Done" increment a "not done seen= =20 counter" and likewise with a "done seen counter". Whenever the former is=20 greater than the later you have one or more not done activities. David J. Ah, this is what I'm looking for, I think. -- Andreas Joseph Krogh CTO / Partner - Visena AS Mobile: +47 909 56 963 andreas@visena.com www.visena.com ------=_Part_616373_941489540.1675961943821 Content-Type: text/html;charset=UTF-8 Content-Transfer-Encoding: quoted-printable
P=C3=A5= torsdag 09. februar 2023 kl. 17:44:25, skrev David G. Johnston <david.g.johnston@gmail.com>:<= /div>
On Thu, Feb 9, 2023 at 12:24 AM Andreas= Joseph Krogh <andreas@visena.com<= span style=3D"font-family:Arial,Helvetica,sans-serif;">> wrote:=C2=A0

Is there a better way, using some extra tab= les to do bookkeeping can the have constraints ensuring this business-requi= rement?
=C2=A0

=C2=A0

= =C2=A0
Every time an activity newly becomes "Not Done" i= ncrement a "not done seen counter" and likewise with a "done= seen counter".=C2=A0 Whenever the former is greater than the later yo= u have one or more not done activities.
=C2=A0
David J.
=C2=A0

Ah, = this is what I'm looking for, I think.

=C2=A0<= /p>

=
--
Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47= 909 56 963
3D""
=
=C2=A0
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