QUERY PLAN                                        
 --------------------------------------------------------------------------------------------
  Insert on foo  (cost=0.00..0.01 rows=1 width=24) (actual time=0.504..0.505 rows=0 loops=1)
    ->  Result  (cost=0.00..0.01 rows=1 width=24) (actual time=0.019..0.020 rows=1 loops=1)
  Planning Time: 0.072 ms
  Trigger foo_system_time_generated_always: time=0.401 calls=1
  Trigger foo_system_time_write_history: time=0.260 calls=1
  Execution Time: 0.842 ms
 (6 rows)