Re: Clarify "allow_system_table_mods"

On 04/25/2016 05:29 PM, Stephen Frost wrote:
> * Melvin Davidson (melvin6925@gmail.com) wrote:
>> Hmmm, if you go back a few comments, you will note that per initdb --help
>> there is no such option available.
>
> It's not an option *to* initdb, it's an option which is used *by*
> initdb.

That really did not clear things up:) Does it mean that you can
pre-populate the $DATA directory with a postgresql.conf that has
allow_system_table_mods set to on and initdb will pick it up?

Personally, I think tampering with the system catalogs is foolish. Still
if you have documentation for something(even if it is a foot gun) it
should be understandable. If the intent is for end users/dba's not use
these options I would say take then out of the user docs and put them in
the developer Wiki section.

>
> I'm afraid I'm done with this particular discussion.  Hopefully it's
> purpose is now clear and you understand a bit better what is required to
> actually add a column to pg_class.
>
> Thanks!
>
> Stephen
>


--
Adrian Klaver
adrian.klaver@aklaver.com