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From: Alvaro Herrera <[email protected]>
To: Tomas Vondra <[email protected]>
Cc: Dilip Kumar <[email protected]>
Cc: Amit Kapila <[email protected]>
Cc: Greg Nancarrow <[email protected]>
Cc: Euler Taveira <[email protected]>
Cc: Peter Smith <[email protected]>
Cc: Rahila Syed <[email protected]>
Cc: Peter Eisentraut <[email protected]>
Cc: Önder Kalacı <[email protected]>
Cc: japin <[email protected]>
Cc: Michael Paquier <[email protected]>
Cc: David Steele <[email protected]>
Cc: Craig Ringer <[email protected]>
Cc: Tomas Vondra <[email protected]>
Cc: Amit Langote <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: row filtering for logical replication
Date: Mon, 19 Jul 2021 22:23:07 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 2021-Jul-19, Tomas Vondra wrote:

> I have a feeling it's getting overly complicated, to the extent that
> it'll be hard to explain to users and reason about. I don't think
> there's a "perfect" solution for cases when the filter expression gives
> different answers for old/new row - it'll always be surprising for some
> users :-(
> 
> So maybe the best thing is to stick to the simple approach already used
> e.g. by pglogical, which simply user the new row when available (insert,
> update) and old one for deletes.

OK, no objection to that plan.

-- 
Álvaro Herrera           39°49'30"S 73°17'W  —  https://www.EnterpriseDB.com/
"No es bueno caminar con un hombre muerto"

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