Re: dblink does not resolve DNS, but works with IP

On 05/14/2013 09:17 PM, Mike Christensen wrote:
> If I have this:
>
> CREATE OR REPLACE VIEW Link.Foo AS
> select * from dblink(
> 'hostaddr=123.123.123.123 dbname=KitchenPC user=Website
> password=secret',
> 'select * from Foo') as ...
>
> Then it works. However, if I do:
>
> CREATE OR REPLACE VIEW Link.Foo AS
> select * from dblink(
> 'hostaddr=db.domain.com <http://db.domain.com> dbname=KitchenPC
> user=Website password=secret',
> 'select * from Foo') as ...
>
> Then I get:
>
> ERROR: could not establish connection
> DETAIL: could not translate host name "db.domain.com
> <http://db.domain.com>" to address: Unknown host
>
> However, from a command prompt I can ping db.domain.com
> <http://db.domain.com> and get 123.123.123.123.
>
> Does dblink just not support DNS resolution? I really don't want to
> hard code IP addresses in my scripts. Thanks!

See below for explanation of hostaddr and host. Short version, you are
looking for host:

http://www.postgresql.org/docs/9.2/interactive/libpq-connect.html#LIBPQ-PARAMKEYWORDS

--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com