Re: [TODO] Process pg_hba.conf keywords as case-insensitive

On 07/17/2014 01:41 AM, Tom Lane wrote:
> Christoph Berg <cb@df7cb.de> writes:
>> Re: Viswanatham kirankumar 2014-07-16 <EC867DEF52699D4189B584A14BAA7C2165440538@blreml504-mbx.china.huawei.com>
>>> Attached patch is implementing following TODO item
>>> Process pg_hba.conf keywords as case-insensitive
> 
>> Hmm. I see a case for accepting "ALL" (as in hosts.allow(5)), so +1 on
>> that, but I don't think the other keywords like "host" and "peer"
>> should be valid in upper case.
> 
> I think the argument was that SQL users are accustomed to thinking
> that keywords are case-insensitive.  It makes sense to me that we
> should adopt that same convention in pg_hba.conf.
> 
> Re-reading the original thread, there was also concern about whether
> we should try to make quoting/casefolding behave more like it does in SQL,
> specifically for matching pg_hba.conf items to SQL identifiers (database
> and role names).  This patch doesn't seem to have addressed that part
> of it, but I think we need to think those things through before we
> just do a blind s/strcmp/pg_strcasecmp/g.  Otherwise we might find that
> we've added ambiguity that will give us trouble when we do try to fix
> that.

It's worth noting that pg_ident.conf uses SQL-like case-folding and
quoting, though I don't think it's documented.

We should certainly be using the same thing in pg_hba.conf IMO.

-- Craig Ringer                   http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services