Re: [Postgres-xc-developers] Detecting XC

[Koichi S. <koi...@gm...>]

Because XC didn't change libpq at all, I cannot find explicit way if
you're connecting to PG or XC.   Even psql binary from PG works with
XC.   I'd suggest to test if pgxc_class, pgxc_node and pgxc_nodegroup
catalog is available, which are all XC specifyc.   To avoid name
conflict (you can create table pgxc_class in PG), you can specify
pgxc_class oid value, which will be release-specific though.

Regards;
---
Koichi Suzuki


2014-02-05 David E. Wheeler <da...@ju...>:
> On Feb 4, 2014, at 5:27 PM, Koichi Suzuki <koi...@gm...> wrote:
>
>> You can detect a coordinator in the same way as vanilla PostgreSQL through psql:
>>
>> SELECT 1;
>>
>> They work when GTM is up and the coordinator is connected to GTM.
>> Anyway, without GTM up and running, the cluster won't work.
>>
>> Please note that pgxc_ctl monitor command goes directly to datanodes
>> because it configures all the components.
>
> No, what I want to know is if I have connected to XC and not PG.
>
> D
>