public inbox for [email protected]
help / color / mirror / Atom feedFrom: Steve Midgley <[email protected]>
To: Andreas Joseph Krogh <[email protected]>
Cc: [email protected]
Subject: Re: How to ensure a log-entry is created based on state of data in other tables
Date: Thu, 9 Feb 2023 08:37:35 -0800
Message-ID: <CAJexoS+s7FcuOTgXXsBDM+xNTUgE0+Tu1+eo54TW_SBsYsTvow@mail.gmail.com> (raw)
In-Reply-To: <VisenaEmail.6a.d3040d504876c082.1863705b248@visena.app.internal.visena.net>
References: <VisenaEmail.3d.88fc3a77a99e504f.18635052f66@visena.app.internal.visena.net>
<CAJexoSJT_uVdMGwne8wDBEsZEMA_jfPdz41S0W9sVoj+MugOUA@mail.gmail.com>
<VisenaEmail.6a.d3040d504876c082.1863705b248@visena.app.internal.visena.net>
On Thu, Feb 9, 2023 at 8:33 AM Andreas Joseph Krogh <[email protected]>
wrote:
> På torsdag 09. februar 2023 kl. 16:08:16, skrev Steve Midgley <
> [email protected]>:
>
> […]
>>
>>
>>
> What is the time window required for "DONE" and "NOT_DONE" to be correct?
> Do they need to be atomic (meaning the time window is effectively 0)? Or
> can the system "notice" recent changes and keep track of done/not done
> after-the-fact? If your time window is > 0, it seems like recurring
> processes could be set up to track DONE / NOT_DONE?
>
> Another totally different way to think about this is to create a view that
> provides answers on DONE and NOT_DONE as computed values based on the
> underlying state of the table at the time the view is queried? That would
> seem to satisfy a time window of 0?
>
> Steve
>
> Yes, they need to be atomic. Either all are DONE and there *is* an entry
> in activity_product_log for product_id, *or* there is no entry in
> activity_product_log.
>
>
>
So, would the view table approach work? So DONE / NOT_DONE is simply
calculated at the time that view is queried? It seems atomic to me,
especially if the query to the table is made with the appropriate
concurrency flags?
view thread (7+ messages) latest in thread
reply
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: [email protected]
Cc: [email protected], [email protected], [email protected]
Subject: Re: How to ensure a log-entry is created based on state of data in other tables
In-Reply-To: <CAJexoS+s7FcuOTgXXsBDM+xNTUgE0+Tu1+eo54TW_SBsYsTvow@mail.gmail.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox