Re: allow_system_table_mods stuff

On Mon, Jun 24, 2019 at 11:21 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> > I'm repeating myself, but I still think it's super-useful to
> > distinguish things which are "for expert use only" from things which
> > are "totally bonkers."
>
> Agreed, although "DML vs DDL" is a pretty poor approximation of that
> boundary.  As shown in examples upthread, you can find reasonable things
> to do and totally-catastrophic things to do in both categories.

I agree.  I would like it if there were a way to do better, but I'm
not sure that there is, at least for a reasonable level of effort.

> There's an aesthetic argument to be had about whether to have two
> bools or one three-way switch, but I prefer the former; there's
> no backward-compatibility issue here since allow_system_table_mods
> couldn't be set by applications anyway.

I'm happy to defer on that point.

-- 
Robert Haas
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