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#53'
	and p_container = 'WRAP CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=362099.82..362099.83 rows=1 width=4) (actual time=930.235..930.235 rows=1 loops=1)
   Buffers: shared hit=51947 read=34547 dirtied=57 written=889
   ->  Nested Loop  (cost=130.19..362048.76 rows=20424 width=4) (actual time=1.017..929.096 rows=5620 loops=1)
         Buffers: shared hit=51947 read=34547 dirtied=57 written=889
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..8045.75 rows=2038 width=4) (actual time=0.138..40.761 rows=2046 loops=1)
               Index Cond: ((p_container = 'WRAP CASE'::bpchar) AND (p_brand = 'Brand#53'::bpchar))
               Heap Fetches: 2046
               Buffers: shared hit=1 read=2021 written=54
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.60 rows=10 width=12) (actual time=0.006..0.008 rows=3 loops=2046)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13847
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.422..0.422 rows=1 loops=2046)
                       Buffers: shared hit=38099 read=32526 dirtied=57 written=835
                       ->  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=0.041..0.412 rows=30 loops=2046)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62137
                             Buffers: shared hit=38099 read=32526 dirtied=57 written=835
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.422..0.422 rows=1 loops=2046)
                       Buffers: shared hit=38099 read=32526 dirtied=57 written=835
                       ->  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=0.041..0.412 rows=30 loops=2046)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62137
                             Buffers: shared hit=38099 read=32526 dirtied=57 written=835
 Planning time: 3.463 ms
 Execution time: 930.425 ms
(27 rows)

COMMIT;
COMMIT