Re: unexpected PQresultStatus: 8 with simple logical replication
| От | Brent Tubbs |
|---|---|
| Тема | Re: unexpected PQresultStatus: 8 with simple logical replication |
| Дата | |
| Msg-id | CAAOBOv9j0qwWGe-U1-YQ+rqEcXD0LkiN1UFO52NcB3X-F+FANw@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: unexpected PQresultStatus: 8 with simple logical replication (Michael Paquier <michael.paquier@gmail.com>) |
| Ответы |
Re: unexpected PQresultStatus: 8 with simple logical
replication
|
| Список | pgsql-general |
That's working! The blog posts I linked earlier made me think that I had to explicitly call START_REPLICATION, but I guess that's not necessary?
For anyone else following this thread, I found some better examples at http://pgci.eisentraut.org/jenkins/job/postgresql_master_world/Documentation/logicaldecoding-example.html.
On Sat, Jan 10, 2015 at 4:48 AM, Michael Paquier <michael.paquier@gmail.com> wrote:
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
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