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Error when connecting to database with PostgreSQL and dblink_connect

Ask Time:2016-05-24T20:36:50         Author:Neels

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I have a strange problem with PostgreSQL and dblink. I have a remote PostgreSQL installation on amazon RDS 9.5.2 and a local PostgreSQL installation on Windows 10.

I am trying to transfer data from the local installation to the remote installation using dblink. I am connected to the remote database with a query window opened from pgAdmin III.

When connecting to the default postgres database I am successful:

select dblink_connect('dbname=postgres host=localhost user=postgres password=xxx');

However when I try to connect to any other database I get an error:

select dblink_connect('dbname=gti host=localhost user=postgres password=xxx');
ERROR:  could not establish connection
DETAIL:  FATAL:  database "gti" does not exist

********** Error **********

ERROR: could not establish connection
SQL state: 08001
Detail: FATAL:  database "gti" does not exist

I have changed ownership to the postgres user for the database.

But I am at my wits end what else to try.

Edited. A screenshot from PgAdmin showing the databases both remote and local: pgAdmin screenshot

Edited 2: I ran select * from pg_database; as requested: Result set

Edited 3: I set up a new PostgreSQL installation on another machine on our local network. Connected to Amazon and got exactly the same error.

If I connect from PostgreSQL on this new pc to PostgreSQL on my pc in pgAdmin, open a query window and dblink_connect from there to the local instance I get no error. So it seems to be either an error when connecting to a database outside our network, or just Amazon specifically.

Edited 4: If I add another user to my Local PostgreSQL instance and grant it superuser access, I cannot connect to my local instance from the amazon query window using dblink. I can however connect to my local instance using this new user from the other PostgreSQL on the local network.

Author:Neels,eproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article:https://stackoverflow.com/questions/37413801/error-when-connecting-to-database-with-postgresql-and-dblink-connect
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