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From: Christophe Pettus <[email protected]>
To: Stuart Campbell <[email protected]>
Cc: [email protected]
Subject: Re: Logical replication with temporary tables
Date: Tue, 2 Jul 2024 18:19:12 -0700
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAAZ6Snxs+6si7gP5yrLNeGAzFgf9_mL1Di+C-_kOAW+96vs+xg@mail.gmail.com>
References: <CAAZ6SnzRU=qo2nedBa6ESOHfV=WaRJk+UW5DUrxkVMu6Gjpwng@mail.gmail.com>
	<[email protected]>
	<CAAZ6Snxs+6si7gP5yrLNeGAzFgf9_mL1Di+C-_kOAW+96vs+xg@mail.gmail.com>



> On Jul 2, 2024, at 18:16, Stuart Campbell <[email protected]> wrote:
> 
> My understanding was that under the hood, AWS uses the logical replication features that are present in community Postgres. If that's incorrect then I'm sorry for the off-topic post.

Yes, but: The idea of a "degraded" replication is an AWS thing, so it's hard to say what does or does not cause that state to occur without access to proprietary AWS code.

> Maybe my question can be re-summarised as: do DDL operations on temporary tables necessarily have to be written to the WAL? Is there a way to avoid that?

Yes, they do (because they involve catalog changes that need to be WAL-logged), and there is no way of avoiding that in current versions of PostgreSQL.





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