Added query to see all replication sets on slony.

Author: jberkus

slony/see_replication_config.sql

@@ -0,0 +1,11 @@
+select set_id, master.no_comment as master, 
+    array_to_string(array_agg(replicas.no_comment), ',') as replicas,
+    set_comment as replication_desc
+from sl_set 
+join sl_node as master on set_origin = no_id 
+join sl_subscribe ON set_id = sub_set
+join sl_node as replicas ON sub_receiver = replicas.no_id
+where sub_active
+    and replicas.no_active
+group by set_id, master.no_comment, set_comment
+order by set_id;