Logical Replication upgrade

From: "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
To: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
Cc: "mimidatabase(at)gmail(dot)com" <mimidatabase(at)gmail(dot)com>, "pgsql-docs(at)lists(dot)postgresql(dot)org" <pgsql-docs(at)lists(dot)postgresql(dot)org>
Subject: Logical Replication upgrade
Date: 2026-04-16 05:46:06
Message-ID: CAKFQuwaWUuXJYZSMKtiXFT=kFK-sFg+pSwK0MUN-MBEEobkfBg@mail.gmail.com
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On Wednesday, April 15, 2026, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:

>
> So, how about: "All slots on the old cluster must be usable, i.e.,
> their pg_replication_slots.conflicting is false."?
>

That works.

Then we’d also change:

The new cluster must not have permanent logical slots, i.e., there must be
no slots where pg_replication_slots.temporary is false.

To be:

“The new cluster is only permitted to have temporary logical slots, i.e.,
ones where pg_replication_slots.temporary is true.”

We could make it mirror the above one more closely, but as the former
mentions the old cluster and the later the new one, I kinda like the
different flow, less likely to skim over it.

David J.

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