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From: Julien Rouhaud <[email protected]>
To: Dmitry Dolgov <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Andrey Lepikhov <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Multiple Query IDs for a rewritten parse tree
Date: Sun, 9 Jan 2022 20:04:44 +0800
Message-ID: <20220109120444.gxtnavdswou2g3wa@jrouhaud> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<[email protected]>

On Sun, Jan 09, 2022 at 12:43:06PM +0100, Dmitry Dolgov wrote:
>
> An extension that wants a slightly modified version of hash calculation
> implementation from the core would still need to copy everything. The
> core probably has to provide more than one (hash, method) pair to cover
> some basic needs.

Or just GUC(s) to adapt the behavior.  But in any case there isn't much that
can be done that won't result in a huge performance drop (like e.g. the wanted
stability over logical replication or backup/restore).

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