In article <caf36091-203e-4c10-aa53-7d9087114...@unicell.co.il>, Herouth Maoz <hero...@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))) ); -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
