Обсуждение: operator '~~' for types 'inet' and '"unknown"'

Hi,

I seem to have a problem that I haven't found an obvious answer to or a
reference to in the mailing lists or on google. Using dumps on a little
network database that I've made, I've run into problems with select's like:

select * from ske_net_allocs where ip_net like '139.165.19%';

These work on 7.2.3 on freebsd but not with

PostgreSQL 7.3.2 on i386-portbld-freebsd4.7.

I get the following error:

ERROR:  Unable to identify an operator '~~' for types 'inet' and '"unknown"'
        You will have to retype this query using an explicit cast

This may be a real bonehead question, but I'm unfortunately too ignorant to
answer it yet. I've tried using dumps from the 7.2.3 box using both
pg_dump and pg_dump -o.  Thanks in advance for any hints/clue bats.

I'd appreciate a CC, because I read the list via the archives. Thanks.

--
Med vennlig hilsen/Sincerely,

Shaun D. Jurrens
Drift og Sikkerhetskonsulent
IKT-Avdeling
Oslo Skoleetaten
Tel:    +47 2208 7394
Mobil:  +47 9820 8826

gpg key fingerprint: 007A B6BD 8B1B BAB9 C583  2D19 3A7F 4A3E F83E 84AE

On Mon, 7 Apr 2003, Shaun Jurrens wrote:

> I seem to have a problem that I haven't found an obvious answer to or a
> reference to in the mailing lists or on google. Using dumps on a little
> network database that I've made, I've run into problems with select's
> like:
>
> select * from ske_net_allocs where ip_net like '139.165.19%';
>
> These work on 7.2.3 on freebsd but not with
>
> PostgreSQL 7.3.2 on i386-portbld-freebsd4.7.
>
> I get the following error:
>
> ERROR:  Unable to identify an operator '~~' for types 'inet' and '"unknown"'
>         You will have to retype this query using an explicit cast
>
> This may be a real bonehead question, but I'm unfortunately too ignorant
> to answer it yet. I've tried using dumps from the 7.2.3 box using both
> pg_dump and pg_dump -o.  Thanks in advance for any hints/clue bats.
>
> I'd appreciate a CC, because I read the list via the archives. Thanks.

Some implicit casting rules have been dropped as of PG 7.3 and so this
problem has nothing to do with pg_dump options ;)

To use "like" with "inet" you need to cast it explicitly to "text", so try

    select * from ske_net_allocs where ip_net::text like '139.165.19%';

Of course no normal index on ip_net would help you with this...

This could also work (untested)

    select  * from ske_net_allocs where ip_net >= '139.165.190.0' and
        ip_net <= '139.165.199.255';

And it perhaps even uses indices.

See
http://www.postgresql.org/docs/view.php?version=7.3&idoc=0&file=functions-net.html
for complete list of "inet" operators.

--
Antti Haapala