Magnus Hagander <> writes:
> I hacked up an attempt to do this. It does seem to work in the very simple
> case, but it does requiring changing the order in InitPostgres() to load
> the startup packet before validating those.

I doubt that's safe.  It requires, to name just one thing, an assumption
that no processing done in process_startup_options has any need to know
the database encoding, which is established by CheckMyDatabase.  Thus
for instance, if any GUC settings carried in the startup packet include
non-ASCII characters, the wrong things will happen.

You could possibly make it work with more aggressive refactoring, but
I remain of the opinion that this is a fundamentally bad idea anyhow.
A GUC of this kind is just ripe for abuse, and I don't think it's solving
any problem we really need solved.

                        regards, tom lane

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