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#52'
	and p_container = 'SM CAN'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=348808.15..348808.17 rows=1 width=4) (actual time=773.699..773.699 rows=1 loops=1)
   Buffers: shared hit=57401 read=26341 dirtied=325 written=710
   ->  Nested Loop  (cost=130.19..348758.65 rows=19801 width=4) (actual time=1.133..772.684 rows=5309 loops=1)
         Buffers: shared hit=57401 read=26341 dirtied=325 written=710
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7752.37 rows=1963 width=4) (actual time=0.194..27.525 rows=1990 loops=1)
               Index Cond: ((p_container = 'SM CAN'::bpchar) AND (p_brand = 'Brand#52'::bpchar))
               Heap Fetches: 1990
               Buffers: shared hit=874 read=1091 written=37
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.62 rows=10 width=12) (actual time=0.006..0.008 rows=3 loops=1990)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13318
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.363..0.363 rows=1 loops=1990)
                       Buffers: shared hit=43209 read=25250 dirtied=325 written=673
                       ->  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=0.037..0.353 rows=30 loops=1990)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60165
                             Buffers: shared hit=43209 read=25250 dirtied=325 written=673
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.363..0.363 rows=1 loops=1990)
                       Buffers: shared hit=43209 read=25250 dirtied=325 written=673
                       ->  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=0.037..0.353 rows=30 loops=1990)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60165
                             Buffers: shared hit=43209 read=25250 dirtied=325 written=673
 Planning time: 3.950 ms
 Execution time: 774.036 ms
(27 rows)

COMMIT;
COMMIT