Re: unexpected PQresultStatus: 8 with simple logical replication

On Sat, Jan 10, 2015 at 9:22 AM, Brent Tubbs <brent.tubbs@gmail.com> wrote:
> psql "dbname=postgres replication=database user=postgres" -c
> "START_REPLICATION SLOT foobar LOGICAL 0/D9C59A28"
> unexpected PQresultStatus: 8
psql is not smart enough to understand that with a replication connection..

> Advice?
You should use pg_logical_slot_peek_changes or
pg_logical_slot_get_changes to grab changes from a replication slot
using psql. If you are looking at something at a lower level, have a
look at pg_recvlogical as an example of logical change receiver. It is
a good start point as well if your goal is to implement your own
receiver.

In any case, the documentation provides some examples:
http://www.postgresql.org/docs/current/static/logicaldecoding-example.html
--
Michael