From: pgsql-general-ow...@postgresql.org 
[mailto:pgsql-general-ow...@postgresql.org] On Behalf Of Cory Tucker
Sent: Tuesday, February 17, 2015 4:21 PM
To: pgsql-general@postgresql.org
Subject: [GENERAL] Determine all listeners subscribed to notifcations and what 
channels

I'm interested in trying to figure out which channels have been subscribed to 
(using LISTEN).  From what I could tell via a little Googling, there used to be 
a table named pg_catalog.pg_listener that contained all this information, but 
that seems to have disappeared somewhere in the 9.x release (I'm using 9.3.x).

Is there a way to find out which channels have listeners?

thanks
--Cory


Take a look at pg_listening_channels() in PG docs.

Regards,
Igor Neyman

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