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#23'
	and p_container = 'MED CAN'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=396874.64..396874.65 rows=1 width=4) (actual time=1503.419..1503.420 rows=1 loops=1)
   Buffers: shared hit=54663 read=30742 dirtied=236 written=11
   ->  Nested Loop  (cost=140.78..396824.90 rows=19893 width=4) (actual time=1.392..1501.363 rows=5393 loops=1)
         Buffers: shared hit=54663 read=30742 dirtied=236 written=11
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7801.78 rows=1976 width=4) (actual time=0.391..45.803 rows=2031 loops=1)
               Index Cond: ((p_container = 'MED CAN'::bpchar) AND (p_brand = 'Brand#23'::bpchar))
               Heap Fetches: 2031
               Buffers: shared hit=1067 read=937
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.77 rows=10 width=12) (actual time=0.021..0.025 rows=3 loops=2031)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13576
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.685..0.685 rows=1 loops=2031)
                       Buffers: shared hit=40020 read=29805 dirtied=236 written=11
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.69 rows=31 width=4) (actual time=0.071..0.666 rows=30 loops=2031)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61379
                             Buffers: shared hit=40020 read=29805 dirtied=236 written=11
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.685..0.685 rows=1 loops=2031)
                       Buffers: shared hit=40020 read=29805 dirtied=236 written=11
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.69 rows=31 width=4) (actual time=0.071..0.666 rows=30 loops=2031)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61379
                             Buffers: shared hit=40020 read=29805 dirtied=236 written=11
 Total runtime: 1503.723 ms
(26 rows)

COMMIT;
COMMIT