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官方文档：http://www.postgresql.org/docs/9.4/interactive/datatype-net-types.html
postgres=# create table test (id int, name text); CREATE TABLE postgres=# \d test Table "public.test" Column | Type | Modifiers --------+---------+----------- id | integer | name | text | postgres=# alter table test add column ip cidr; ALTER TABLE postgres=# \d test Table "public.test" Column | Type | Modifiers --------+---------+----------- id | integer | name | text | ip | cidr | postgres=# insert into test values (1, ‘a‘, ‘192.168.1.100‘); INSERT 0 1 postgres=# select * from test ; id | name | ip ----+------+------------------ 1 | a | 192.168.1.100/32 (1 row) postgres=# insert into test values (2, ‘b‘, ‘192.168.0.0/16‘); INSERT 0 1 postgres=# select * from test ; id | name | ip ----+------+------------------ 1 | a | 192.168.1.100/32 2 | b | 192.168.0.0/16 (2 rows) postgres=# insert into test values (3, ‘c‘, ‘192.168.1.0/24‘); INSERT 0 1 postgres=# select * from test ; id | name | ip ----+------+------------------ 1 | a | 192.168.1.100/32 2 | b | 192.168.0.0/16 3 | c | 192.168.1.0/24 (3 rows)
查询使用
postgres=# select * from test where ip = ‘192.168.1.100‘; id | name | ip ----+------+------------------ 1 | a | 192.168.1.100/32 (1 row) postgres=# select * from test where ip >= ‘192.168.1.0/24‘; id | name | ip ----+------+------------------ 1 | a | 192.168.1.100/32 3 | c | 192.168.1.0/24 (2 rows) postgres=# select * from test where ip >= ‘192.168.0.0/16‘; id | name | ip ----+------+------------------ 1 | a | 192.168.1.100/32 2 | b | 192.168.0.0/16 3 | c | 192.168.1.0/24 (3 rows)
postgres=# update test set ip = ‘192.168.1.101/32‘ where id = 2; UPDATE 1 postgres=# update test set ip = ‘192.168.1.102/32‘ where id = 3; UPDATE 1 postgres=# select * from test ; id | name | ip ----+------+------------------ 1 | a | 192.168.1.100/32 2 | b | 192.168.1.101/32 3 | c | 192.168.1.102/32 (3 rows) postgres=# select * from test where ip between ‘192.168.1.100‘ and ‘192.168.1.101‘; id | name | ip ----+------+------------------ 1 | a | 192.168.1.100/32 2 | b | 192.168.1.101/32 (2 rows) postgres=# select * from test where ip between ‘192.168.1.100‘ and ‘192.168.1.102‘; id | name | ip ----+------+------------------ 1 | a | 192.168.1.100/32 2 | b | 192.168.1.101/32 3 | c | 192.168.1.102/32 (3 rows)
将cidr修改为inet
postgres=# \d test Table "public.test" Column | Type | Modifiers --------+---------+----------- id | integer | name | text | ip | cidr | postgres=# alter table test alter column ip type inet; ALTER TABLE postgres=# \d test Table "public.test" Column | Type | Modifiers --------+---------+----------- id | integer | name | text | ip | inet |
postgres=# select * from test ; id | name | ip ----+------+--------------- 1 | a | 192.168.1.100 2 | b | 192.168.1.101 3 | c | 192.168.1.102 (3 rows) postgres=# update test set ip = ‘192.168.0.0/16‘ where id = 3; UPDATE 1 postgres=# select * from test ; id | name | ip ----+------+---------------- 1 | a | 192.168.1.100 2 | b | 192.168.1.101 3 | c | 192.168.0.0/16 (3 rows) postgres=# update test set ip = ‘192.168.1.0/24‘ where id = 2; UPDATE 1 postgres=# select * from test ; id | name | ip ----+------+---------------- 1 | a | 192.168.1.100 3 | c | 192.168.0.0/16 2 | b | 192.168.1.0/24 (3 rows)
可见，inet默认32位掩码的ip是不带‘/32‘的
postgres=# select * from test where ip >= ‘192.168.1.100‘; id | name | ip ----+------+--------------- 1 | a | 192.168.1.100 (1 row) postgres=# select * from test where ip >= ‘192.168.1.1‘; id | name | ip ----+------+--------------- 1 | a | 192.168.1.100 (1 row) postgres=# select * from test where ip >= ‘192.168.1.101‘; id | name | ip ----+------+---- (0 rows) postgres=# select * from test where ip >= ‘192.168.1.0/32‘; id | name | ip ----+------+--------------- 1 | a | 192.168.1.100 (1 row) postgres=# select * from test where ip >= ‘192.168.1.0/16‘; id | name | ip ----+------+---------------- 1 | a | 192.168.1.100 2 | b | 192.168.1.0/24 (2 rows) postgres=# select * from test where ip >= ‘192.168.0.0/16‘; id | name | ip ----+------+---------------- 1 | a | 192.168.1.100 3 | c | 192.168.0.0/16 2 | b | 192.168.1.0/24 (3 rows)
使用跟cidr差不多
postgres=# \d test Table "public.test" Column | Type | Modifiers --------+---------+----------- id | integer | name | text | ip | inet | postgres=# alter table test add column mac macaddr; ALTER TABLE postgres=# \d test Table "public.test" Column | Type | Modifiers --------+---------+----------- id | integer | name | text | ip | inet | mac | macaddr | postgres=# select * from test ; id | name | ip | mac ----+------+----------------+----- 1 | a | 192.168.1.100 | 3 | c | 192.168.0.0/16 | 2 | b | 192.168.1.0/24 | (3 rows)
postgres=# update test set mac = ‘08:00:2b:01:02:03‘ where id = 1; UPDATE 1 postgres=# select * from test ; id | name | ip | mac ----+------+----------------+------------------- 3 | c | 192.168.0.0/16 | 2 | b | 192.168.1.0/24 | 1 | a | 192.168.1.100 | 08:00:2b:01:02:03 (3 rows) postgres=# update test set mac = ‘08:00:2b:01:02:04‘ where id = 2; UPDATE 1 postgres=# update test set mac = ‘08:00:2b:01:02:05‘ where id = 3; UPDATE 1 postgres=# select * from test ; id | name | ip | mac ----+------+----------------+------------------- 1 | a | 192.168.1.100 | 08:00:2b:01:02:03 2 | b | 192.168.1.0/24 | 08:00:2b:01:02:04 3 | c | 192.168.0.0/16 | 08:00:2b:01:02:05 (3 rows)
查询使用
postgres=# select * from test where mac = ‘08:00:2b:01:02:03‘; id | name | ip | mac ----+------+---------------+------------------- 1 | a | 192.168.1.100 | 08:00:2b:01:02:03 (1 row) postgres=# select * from test where mac > ‘08:00:2b:01:02:03‘; id | name | ip | mac ----+------+----------------+------------------- 2 | b | 192.168.1.0/24 | 08:00:2b:01:02:04 3 | c | 192.168.0.0/16 | 08:00:2b:01:02:05 (2 rows)
PostgreSQL默认还不支持iprange，需要安装ip4r的扩展，详见：http://pgfoundry.org/projects/ip4r/
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原文地址：http://my.oschina.net/u/2426299/blog/497727
