QUERY PLAN
Group (cost=1.62..1.63 rows=1 width=4)
Group Key: user_id
-> Sort (cost=1.62..1.63 rows=1 width=4)
Sort Key: user_id
-> Seq Scan on tbl_user_role_change_logs (cost=0.00..1.61 rows=1 width=4)
Filter: ((user_id IS NOT NULL) AND ((role_name)::text = 'AccountManager'::text))