From: Euler Taveira <euler@eulerto.com>
To: kdg.dev@gmail.com
To: pgsql-docs@lists.postgresql.org
Subject: Re: Unclear on Publication documentation page
Date: Mon, 20 May 2024 23:16:17 -0300
Message-ID: <009dbc5c-d229-4180-b425-632b681cba1d@app.fastmail.com> (raw)
In-Reply-To: <171606508791.686.3944833439498473045@wrigleys.postgresql.org>
References: <171606508791.686.3944833439498473045@wrigleys.postgresql.org>
On Sat, May 18, 2024, at 5:44 PM, PG Doc comments form wrote:
> The page in question:
> https://www.postgresql.org/docs/current/logical-replication-publication.html
>
> It says:
>
> "If a table without a replica identity is added to a publication that
> replicates UPDATE or DELETE operations then subsequent UPDATE or DELETE
> operations will cause an error on the publisher. INSERT operations can
> proceed regardless of any replica identity."
>
> The text is ambiguous as to what is meant by "the publisher" in "will cause
> an error on the publisher". I've personally never set up logical
> replication, which is why I'm reading the documentation now.
>
> The question for me is: Does "the publisher" refer to a logical entity,
> created by the "CREATE PUBLICATION " command? And further publication in the
> publication<->subscriber model will not work anymore? Or does it refer to
> the actual database itself, and will the functionality of the database be
> impacted? As in: your live production database can now no longer process
> UPDATE and DELETE statements so long as that publication exists/so long as
> that publication is configured to publish that particular table?
The first paragraph in the referred URL says
The node where a publication is defined is referred to as publisher.
And [2] defines the logical replication model:
Logical replication uses a publish and subscribe model with one or more
subscribers subscribing to one or more publications on a publisher node.
Unless there is a documentation bug or you want to suggest changes to any part of
the documentation, use pgsql-general for questions instead.
[2] https://www.postgresql.org/docs/current/logical-replication.html
--
Euler Taveira
EDB https://www.enterprisedb.com/
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To: pgsql-docs@postgresql.org
Cc: euler@eulerto.com, kdg.dev@gmail.com, pgsql-docs@lists.postgresql.org
Subject: Re: Unclear on Publication documentation page
In-Reply-To: <009dbc5c-d229-4180-b425-632b681cba1d@app.fastmail.com>
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