From: Harald Fuchs <hari.fuchs@gmail.com>
To: pgsql-sql@postgresql.org
Subject: Re: exclusion constraint for ranges of IP
Date: Mon, 22 Aug 2011 00:19:53 +0200
Message-ID: <86ty9a5rw6.fsf@mgm.protecting.net> (raw)
References: <CAF36091-203E-4C10-AA53-7D9087114D35@unicell.co.il>
In article <CAF36091-203E-4C10-AA53-7D9087114D35@unicell.co.il>,
Herouth Maoz <herouth@unicell.co.il> writes:
> Hi,
> I'm designing a new database. One of the table contains allowed IP ranges for a customer (Fields: customer_id, from_ip, to_ip) which is intended to check - if an incoming connection's originating IP number falls within the range, it is identified as a particular customer.
> Naturally, I'd like to have constraints on the table that prevent entering of ip ranges that overlap. Is there a way to do that with exclusion constraints? Or do I have to define a new type for this?
This "new type" already exists: ip4r, which can be found in pgfoundry.
With it you can do
CREATE TABLE mytbl (
iprange ip4r NOT NULL,
...,
CONSTRAINT range_check CHECK ((NOT overlap(iprange)))
);
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To: pgsql-sql@postgresql.org
Cc: hari.fuchs@gmail.com
Subject: Re: exclusion constraint for ranges of IP
In-Reply-To: <86ty9a5rw6.fsf@mgm.protecting.net>
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