Postgresql - Functions and Operators 函数和运算 - Network Address

网络数据类型的函数和运算。使用的不会太多，但是功能比较全。

Operator	Description	Example
<	is less than 小于	inet '192.168.1.5' < inet '192.168.1.6'
<=	is less than or equal 小于等于	inet '192.168.1.5' <= inet '192.168.1.5'
=	equals 等于	inet '192.168.1.5' = inet '192.168.1.5'
>=	is greater or equal 大于等于	inet '192.168.1.5' >= inet '192.168.1.5'
>	is greater than 大于	inet '192.168.1.5' > inet '192.168.1.4'
<>	is not equal 不等于	inet '192.168.1.5' <> inet '192.168.1.4'
<<	is contained by 被包含	inet '192.168.1.5' << inet '192.168.1/24'
<<=	is contained by or equals 包含或等于	inet '192.168.1/24' <<= inet '192.168.1/24'
>>	contains 包含	inet '192.168.1/24' >> inet '192.168.1.5'
>>=	contains or equals 包含或等于	inet '192.168.1/24' >>= inet '192.168.1/24'
&&	contains or is contained by 包含或被包含	inet '192.168.1/24' && inet '192.168.1.80/28'
~	非	~ inet '192.168.1.6'
&	且	inet '192.168.1.6' & inet '0.0.0.255'
|	或	inet '192.168.1.6' | inet '0.0.0.255'
+	加	inet '192.168.1.6' + 25
-	减	inet '192.168.1.43' - 36
-	计算区间内有多少IP	inet '192.168.1.43' - inet '192.168.1.19'

 

Function	Return Type	Description	Example	Result
abbrev(inet)	text	简写IP	abbrev(inet '10.1.0.0/16')	10.1.0.0/16
abbrev(cidr)	text	简写IP为cidr格式	abbrev(cidr '10.1.0.0/16')	10.1/16
broadcast(inet)	inet	取IP的广播地址	broadcast('192.168.1.5/24')	192.168.1.255/24
family(inet)	int	返回IP的类，4或6	family('::1')	6
host(inet)	text	IP值	host('192.168.1.5/24')	192.168.1.5
hostmask(inet)	inet	构造host mask	hostmask('192.168.23.20/30')	0.0.0.3
masklen(inet)	int	掩码值	masklen('192.168.1.5/24')	24
netmask(inet)	inet	获取掩码值	netmask('192.168.1.5/24')	255.255.255.0
network(inet)	cidr	提取IP段	network('192.168.1.5/24')	192.168.1.0/24
set_masklen(inet, int)	inet	更改掩码	set_masklen('192.168.1.5/24', 16)	192.168.1.5/16
set_masklen(cidr, int)	cidr	更改掩码	set_masklen('192.168.1.0/24'::cidr, 16)	192.168.0.0/16
text(inet)	text	设置IP格式为IP:掩码	text(inet '192.168.1.5')	192.168.1.5/32
inet_same_family(inet,inet)	boolean	IP地址是否是一个类（IP4或IP6）	inet_same_family('192.168.1.5/24', '::1')	false
inet_merge(inet, inet)	cidr	包含给定网络的最小网络	inet_merge('192.168.1.5/24', '192.168.2.5/24')	192.168.0.0/22

 

Function	Return Type	Description	Example	Result
trunc(macaddr)	macaddr	截取，设置后三位为00	trunc(macaddr '12:34:56:78:90:ab')	12:34:56:00:00:00

 

Function	Return Type	Description	Example	Result
trunc(macaddr8)	macaddr8	截取，设置后五位为00	trunc(macaddr8 '12:34:56:78:90:ab:cd:ef')	12:34:56:00:00:00:00:00
macaddr8_set7bit(macaddr8)	macaddr8	将二进制的第7位设置为1	macaddr8_set7bit(macaddr8 '00:34:56:ab:cd:ef')	02:34:56:ff:fe:ab:cd:ef