Re: Best way to index IP data?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Michael Stone <mstone+postgres(at)mathom(dot)us>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Best way to index IP data?
Date: 2008-01-12 00:19:10
Message-ID: 28651.1200097150@sss.pgh.pa.us
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Michael Stone <mstone+postgres(at)mathom(dot)us> writes:
> On Fri, Jan 11, 2008 at 03:07:38PM -0500, Tom Lane wrote:
>> Nonsense. 3 bytes overhead on a 16-byte address is not "ridiculously
>> bloated", especially if you want a netmask with it.

> Big if, no? There's a very large set of users that *don't* want/need a
> netmask, which is why the topic keeps coming back. (Also, according to
> the docs, inet requires 24 bytes, which is 50% more than needed; is that
> not correct?)

It was correct, but not as of 8.3. Considering you could save a whole
one byte by not storing the netmask (well, maybe more depending on
alignment considerations), the complaint level is unjustified.

regards, tom lane

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