Refer:
How to close idle connections in PostgreSQL automatically?
http://stackoverflow.com/questions/12391174/how-to-close-idle-connections-in-postgresql-automatically
WITH inactive_connections AS (
SELECT
pid,
rank() over (partition by client_addr order by backend_start ASC) as rank
FROM
pg_stat_activity
WHERE
-- Exclude the thread owned connection (ie no auto-kill)
pid <> pg_backend_pid( )
AND
-- Exclude known applications connections
application_name !~ '(?:psql)|(?:pgAdmin.+)'
AND
-- Include connections to the same database the thread is connected to
datname = current_database()
AND
-- Include connections using the same thread username connection
usename = current_user
AND
-- Include inactive connections only
state in ('idle', 'idle in transaction', 'idle in transaction (aborted)', 'disabled')
AND
-- Include old connections (found with the state_change field)
current_timestamp - state_change > interval '5 minutes'
)
SELECT
pg_terminate_backend(pid)
FROM
inactive_connections
WHERE
rank > 1 -- Leave one connection for each application connected to the database
Get all procedural , user defined functions
Refer: http://stackoverflow.com/questions/16632117/get-all-procedural-user-defined-functions
select
pp.proname,
pl.lanname,
pn.nspname,
pg_get_functiondef(pp.oid)
from pg_proc pp
inner join pg_namespace pn on (pp.pronamespace = pn.oid)
inner join pg_language pl on (pp.prolang = pl.oid)
where pl.lanname NOT IN ('c','internal')
and pn.nspname NOT LIKE 'pg_%'
and pn.nspname <> 'information_schema';
