Re: GUC thread-safety approaches

On Tue, 18 Nov 2025 at 21:50, Peter Eisentraut <peter@eisentraut.org> wrote:
> where get_config_val_*() would be a thin wrapper around hash_search()
> (a bit like the existing GetConfigOption() and find_option(), but
> without all the error checking).
>
> Would that be too expensive?

Why couldn't in-core GUCs be fields in the Session struct and have a
hash table for storage of custom GUCs, and allow core to access the
fields directly? Extensions would need to go through a function which
does the hash lookup.

David