Re: How to ensure a log-entry is created based on state of data in other tables

From: Andreas Joseph Krogh <andreas(at)visena(dot)com>
To: "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
Cc: pgsql-sql(at)lists(dot)postgresql(dot)org
Subject: Re: How to ensure a log-entry is created based on state of data in other tables
Date: 2023-02-09 16:59:03
Message-ID: VisenaEmail.6b.d76438498ddf3620.186371b8050@visena.app.internal.visena.net
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På torsdag 09. februar 2023 kl. 17:44:25, skrev David G. Johnston <
david(dot)g(dot)johnston(at)gmail(dot)com <mailto:david(dot)g(dot)johnston(at)gmail(dot)com>>:

On Thu, Feb 9, 2023 at 12:24 AM Andreas Joseph Krogh <andreas(at)visena(dot)com
<mailto:andreas(at)visena(dot)com>> wrote:

Is there a better way, using some extra tables to do bookkeeping can the have
constraints ensuring this business-requirement?

Every time an activity newly becomes "Not Done" increment a "not done seen
counter" and likewise with a "done seen counter". Whenever the former is
greater than the later you have one or more not done activities.

David J.

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

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Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47 909 56 963
andreas(at)visena(dot)com <mailto:andreas(at)visena(dot)com>
www.visena.com <https://www.visena.com>
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