BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	sum(l_extendedprice) / 7.0 as avg_yearly
from
	lineitem,
	part
where
	p_partkey = l_partkey
	and p_brand = 'Brand#55'
	and p_container = 'MED DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=354828.78..354828.79 rows=1 width=4) (actual time=468.867..468.868 rows=1 loops=1)
   Buffers: shared hit=76371 read=10780 dirtied=1
   ->  Nested Loop  (cost=130.19..354778.81 rows=19985 width=4) (actual time=0.917..467.939 rows=5671 loops=1)
         Buffers: shared hit=76371 read=10780 dirtied=1
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7885.10 rows=1997 width=4) (actual time=0.179..25.376 rows=2077 loops=1)
               Index Cond: ((p_container = 'MED DRUM'::bpchar) AND (p_brand = 'Brand#55'::bpchar))
               Heap Fetches: 2077
               Buffers: shared hit=13 read=2031
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.004..0.005 rows=3 loops=2077)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=14010
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.205..0.205 rows=1 loops=2077)
                       Buffers: shared hit=62348 read=8749 dirtied=1
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem lineitem_1  (cost=0.56..129.11 rows=31 width=4) (actual time=0.025..0.198 rows=30 loops=2077)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62478
                             Buffers: shared hit=62348 read=8749 dirtied=1
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.205..0.205 rows=1 loops=2077)
                       Buffers: shared hit=62348 read=8749 dirtied=1
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem lineitem_1  (cost=0.56..129.11 rows=31 width=4) (actual time=0.025..0.198 rows=30 loops=2077)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62478
                             Buffers: shared hit=62348 read=8749 dirtied=1
 Planning time: 4.950 ms
 Execution time: 469.133 ms
(27 rows)

COMMIT;
COMMIT