Re: IPv6 link-local addresses and init data type

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>, Markus Wanner <markus(at)bluegap(dot)ch>, Andreas Karlsson <andreas(at)proxel(dot)se>, Tom Dunstan <pgsql(at)tomd(dot)cc>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: IPv6 link-local addresses and init data type
Date: 2016-11-09 18:29:11
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Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> On Wed, Nov 9, 2016 at 9:02 AM, Peter Eisentraut
> <peter(dot)eisentraut(at)2ndquadrant(dot)com> wrote:
>> On 11/7/16 1:13 AM, Haribabu Kommi wrote:
>>> Yes, I agree that default zone is the main use case of the original thread.
>>> From the RFC 4007, the default zone is used for the global addresses,
>>> This may be the main use case with zone id. How about currently just
>>> ignoring it and store the actual IP address with the attached patch and
>>> handle the rest of the actual zone id support later once the it gets
>>> properly standardized?

>> Well, according to the RFC, the default zone is 0 "typically", which is
>> a very weak requirement. So just ignoring it is probably also not right.
>> So far we have only heard one use case for any of this, which is someone
>> wanting to store ::1%0, which is not even a valid address according to
>> that same RFC. So this is all on very weak ground.
>> I think we should just forget about this. It's all a bit too dubious.

> +1.

Agreed, let's wait until more standardization emerges. Anything we do now
risks painting ourselves into a corner, and there is not so much demand
for a feature in this area that we need to do something about it Right Now.

regards, tom lane

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