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Re: Removing postgres -f command line option

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Removing postgres -f command line option
Date: 2011-11-21 18:27:24
Message-ID: 201111211827.pALIROQ28536@momjian.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Tom Lane wrote:
> Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> writes:
> > While looking at Shigeru Hanada's foreign join pushdown patch, I noticed 
> > a command line option that I didn't know to exist:
> 
> > $ postgres --help
> > ...
> > Developer options:
> >    -f s|i|n|m|h    forbid use of some plan types
> 
> Hmm, I thought I'd fixed that help message to match reality recently.
> 
> > That seems completely useless to me, because you can also do "-c 
> > enable_seqscan=off". Any objections to removing the -f option altogether?
> 
> I use it.  See also src/test/regress/regressplans.sh, which would become
> greatly less wieldy if it had to spell out the switches long-form.

I think it is hard to argue that such a  user-visible flag is
reasonable, even if it helps backend developers avoid some keystrokes.

I think flags used only by backend developers should be things that can
_only_ be done with flags.

-- 
  Bruce Momjian  <bruce(at)momjian(dot)us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + It's impossible for everything to be true. +

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