Re: Unclear on Publication documentation page

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?