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).