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 |