Re: DBLINK Error

It is working fine after restarting the postgres server.

On Sat, Sep 2, 2023 at 6:58 PM Erik Wienhold <ewie(at)ewie(dot)name> wrote:

> On 02/09/2023 09:50 CEST Daulat <daulat(dot)dba(at)gmail(dot)com> wrote:
>
> > I am facing an issue while fetching data using dblink.
> > I am using a .pgpass file and MD5 for authentication.
>
> What does ~postgres/.pgpass and pg_hba.conf look like?
>
> > .pgpass file is located in the home directory (postgres user home) of the
> > user running the PostgreSQL query. This file has proper permission 0600
> and
> > owner postgres to keep it secure. The OS is Amazon Linux.
> >
> > Connection made successfully without giving password.
> >
> > [root(at)DEM-MT bin]# ./psql -d postgres -U postgres
> > psql (14.6)
> > Type "help" for help.
> >
> > postgres=#
>
> Does root also have a .pgpass file? Otherwise this looks like user
> postgres is
> configured with trust authentication (at least on database postgres) if
> there's
> no password prompt for user postgres.
>
> > cd /opt/PostgreSQL-14/bin/
> > [root(at)DEM-MT bin]# ./psql -d postgres -U postgres -W
> > Password:
> > psql (14.6)
> > Type "help" for help.
> >
> > postgres=#
>
> Does it accept any password? That would be the case for trust
> authentication.
>
> > ERROR:
> > -----------
> >
> > cd /opt/PostgreSQL-14/bin/
> > [postgres(at)DMM-MT bin]$ ./psql -U postgres -d tn2_demo_10
> >
> > tn2_demo_10=# select * from
> ucf.dblink_connect_u('conn','dbname="ADT_DEM_DB"');
> > ERROR: could not establish connection
> > DETAIL: connection to server on socket "/tmp/.s.PGSQL.5432" failed:
> fe_sendauth: no password supplied
>
> Okay, no trust authentication for user postgres on database ADT_DEM_DB. My
> guess is an error in ~postgres/.pgpass so that libpq does not find a
> matching
> entry for the connection.
>
> --
> Erik
>