cidr and inet Functions
The abbrev, host, and text functions are primarily intended to offer alternative display formats.
abbrev(inet)
Description: Abbreviated display format as text
Return type: text
Example:
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gaussdb=# SELECT abbrev(inet '10.1.0.0/16') AS RESULT; result ------------- 10.1.0.0/16 (1 row) |
abbrev(cidr)
Description: Abbreviated display format as text
Return type: text
Example:
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gaussdb=# SELECT abbrev(cidr '10.1.0.0/16') AS RESULT; result --------- 10.1/16 (1 row) |
broadcast(inet)
Description: Broadcast address for networks
Return type: inet
Example:
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gaussdb=# SELECT broadcast('192.168.1.5/24') AS RESULT; result ------------------ 192.168.1.255/24 (1 row) |
family(inet)
Description: Extracts family of address; 4 for IPv4, 6 for IPv6
Return type: int
Example:
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gaussdb=# SELECT family('127.0.0.1') AS RESULT; result -------- 4 (1 row) |
host(inet)
Description: Extracts IP addresses as text.
Return type: text
Example:
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gaussdb=# SELECT host('192.168.1.5/24') AS RESULT; result ------------- 192.168.1.5 (1 row) |
hostmask(inet)
Description: Constructs the host mask for a network.
Return type: inet
Example:
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gaussdb=# SELECT hostmask('192.168.23.20/30') AS RESULT; result --------- 0.0.0.3 (1 row) |
masklen(inet)
Description: Extracts subnet mask length.
Return type: int
Example:
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gaussdb=# SELECT masklen('192.168.1.5/24') AS RESULT; result -------- 24 (1 row) |
netmask(inet)
Description: Constructs the subnet mask for a network.
Return type: inet
Example:
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gaussdb=# SELECT netmask('192.168.1.5/24') AS RESULT; result --------------- 255.255.255.0 (1 row) |
network(inet)
Description: Extracts the network part of an address.
Return type: cidr
Example:
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gaussdb=# SELECT network('192.168.1.5/24') AS RESULT; result ---------------- 192.168.1.0/24 (1 row) |
set_masklen(inet, int)
Description: Sets subnet mask length for the inet value.
Return type: inet
Example:
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gaussdb=# SELECT set_masklen('192.168.1.5/24', 16) AS RESULT; result ---------------- 192.168.1.5/16 (1 row) |
set_masklen(cidr, int)
Description: Sets subnet mask length for the cidr value.
Return type: cidr
Example:
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gaussdb=# SELECT set_masklen('192.168.1.0/24'::cidr, 16) AS RESULT; result ---------------- 192.168.0.0/16 (1 row) |
text(inet)
Description: Extracts IP addresses and subnet mask length as text.
Return type: text
Example:
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gaussdb=# SELECT text(inet '192.168.1.5') AS RESULT; result ---------------- 192.168.1.5/32 (1 row) |
Any cidr value can be cast to inet implicitly or explicitly; therefore, the functions shown above as operating on inet also work on cidr values. An inet value can be cast to cidr. After the conversion, any bits to the right of the subnet mask are silently zeroed to create a valid cidr value. In addition, you can cast a text string to inet or cidr using normal casting syntax. For example, inet(expression) or colname::cidr.
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