Postgres Check if IP (inet) is IN a list of IP Ranges

问题

I want to check if an IP exists in a range of ranges, eg: SELECT * FROM ip_address WHERE ip IN (<list of ip ranges>)

Postgresql documentation states to use the << operator to check if an IP is contained within a single IP Range, eg: inet '192.168.1.5' << inet '192.168.1/24', but I'm not sure how to use it on a list of ranges without having to construct an OR chain of <<'s.

回答1:

select inet '192.168.1.5' << any (array['192.168.1/24', '10/8']::inet[]);
 ?column? 
----------
 t

http://www.postgresql.org/docs/current/static/functions-comparisons.html#AEN18486

来源：https://stackoverflow.com/questions/24944075/postgres-check-if-ip-inet-is-in-a-list-of-ip-ranges