inet to bigint?

On Tue, Dec 06, 2005 at 03:31:59PM +0800, Christopher Kings-Lynne wrote:

OK, I give up - how do I convert an INET type to a NUMERIC
representation of its network address?

How about:

CREATE FUNCTION inet2num(inet) RETURNS numeric AS $$
use Socket;
return unpack("N", inet_aton($_[0]));
$$ LANGUAGE plperlu IMMUTABLE STRICT;

SELECT inet2num('127.0.0.1');
inet2num
------------
2130706433
(1 row)

--
Michael Fuhr

On 12/6/05, Michael Fuhr <mike@fuhr.org> wrote:

How about:
CREATE FUNCTION inet2num(inet) RETURNS numeric AS $$
use Socket;
return unpack("N", inet_aton($_[0]));
$$ LANGUAGE plperlu IMMUTABLE STRICT;

you can use this one:
... AS $$
return unpack("N", pack("C4", split(/\./, $_[0])));
$$ language plperl IMMUTABLE STRICT;

to avoid the need to use untrusted languages.
it is less readable thought :(

depesz

PL/SQL or PL/PGSQL...

Chris

Michael Fuhr wrote:

On Tue, Dec 06, 2005 at 03:51:17PM +0800, Christopher Kings-Lynne wrote:

PL/SQL or PL/PGSQL...

Sheesh, arbitrary restrictions ;-) Something like this then:

CREATE FUNCTION inet2num(inet) RETURNS numeric AS $$
DECLARE
a text[] := string_to_array(host($1), '.');
BEGIN
RETURN a[1]::numeric * 16777216 +
a[2]::numeric * 65536 +
a[3]::numeric * 256 +
a[4]::numeric;
END;
$$ LANGUAGE plpgsql IMMUTABLE STRICT;

--
Michael Fuhr

On Tue, Dec 06, 2005 at 01:05:12AM -0700, Michael Fuhr wrote:

CREATE FUNCTION inet2num(inet) RETURNS numeric AS $$
DECLARE
a text[] := string_to_array(host($1), '.');
BEGIN
RETURN a[1]::numeric * 16777216 +
a[2]::numeric * 65536 +
a[3]::numeric * 256 +
a[4]::numeric;
END;
$$ LANGUAGE plpgsql IMMUTABLE STRICT;

I should point out that this is only for IPv4, so a family() check
might be in order.

--
Michael Fuhr

Sheesh, arbitrary restrictions ;-) Something like this then:

CREATE FUNCTION inet2num(inet) RETURNS numeric AS $$
DECLARE
a text[] := string_to_array(host($1), '.');
BEGIN
RETURN a[1]::numeric * 16777216 +
a[2]::numeric * 65536 +
a[3]::numeric * 256 +
a[4]::numeric;
END;
$$ LANGUAGE plpgsql IMMUTABLE STRICT;

Cool, and now the reverse? :D

(I'll credit you in the MySQL Compat Library code btw) If you're
interested, you'd be welcome to join the project btw...

Chris

On Tue, Dec 06, 2005 at 04:10:22PM +0800, Christopher Kings-Lynne wrote:

Sheesh, arbitrary restrictions ;-) Something like this then:

CREATE FUNCTION inet2num(inet) RETURNS numeric AS $$
DECLARE
a text[] := string_to_array(host($1), '.');
BEGIN
RETURN a[1]::numeric * 16777216 +
a[2]::numeric * 65536 +
a[3]::numeric * 256 +
a[4]::numeric;
END;
$$ LANGUAGE plpgsql IMMUTABLE STRICT;

Cool, and now the reverse? :D

Tom posted one just a couple of days ago:

http://archives.postgresql.org/pgsql-general/2005-12/msg00191.php

(I'll credit you in the MySQL Compat Library code btw) If you're
interested, you'd be welcome to join the project btw...

I haven't been following it but I might have some time. Is there
a TODO list? The one I see on pgfoundry is empty.

--
Michael Fuhr