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#54'
	and p_container = 'SM CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=357136.13..357136.14 rows=1 width=4) (actual time=845.684..845.684 rows=1 loops=1)
   Buffers: shared hit=55942 read=25499 dirtied=48 written=474
   ->  Nested Loop  (cost=130.19..357085.73 rows=20159 width=4) (actual time=1.206..844.597 rows=5195 loops=1)
         Buffers: shared hit=55942 read=25499 dirtied=48 written=474
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7937.23 rows=2010 width=4) (actual time=0.229..37.204 rows=1942 loops=1)
               Index Cond: ((p_container = 'SM CASE'::bpchar) AND (p_brand = 'Brand#54'::bpchar))
               Heap Fetches: 1942
               Buffers: shared hit=232 read=1677 written=32
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.006..0.008 rows=3 loops=1942)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13013
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.404..0.404 rows=1 loops=1942)
                       Buffers: shared hit=42697 read=23822 dirtied=48 written=442
                       ->  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=0.043..0.394 rows=30 loops=1942)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58421
                             Buffers: shared hit=42697 read=23822 dirtied=48 written=442
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.404..0.404 rows=1 loops=1942)
                       Buffers: shared hit=42697 read=23822 dirtied=48 written=442
                       ->  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=0.043..0.394 rows=30 loops=1942)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58421
                             Buffers: shared hit=42697 read=23822 dirtied=48 written=442
 Planning time: 5.572 ms
 Execution time: 845.979 ms
(27 rows)

COMMIT;
COMMIT