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#51'
	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=404902.44..404902.45 rows=1 width=4) (actual time=1331.925..1331.925 rows=1 loops=1)
   Buffers: shared hit=46288 read=37136 dirtied=442 written=49
   ->  Nested Loop  (cost=140.78..404851.42 rows=20408 width=4) (actual time=3.740..1330.178 rows=5170 loops=1)
         Buffers: shared hit=46288 read=37136 dirtied=442 written=49
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7962.13 rows=2016 width=4) (actual time=0.313..49.717 rows=1979 loops=1)
               Index Cond: ((p_container = 'MED DRUM'::bpchar) AND (p_brand = 'Brand#51'::bpchar))
               Heap Fetches: 1979
               Buffers: shared read=1939 written=3
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.77 rows=10 width=12) (actual time=0.011..0.016 rows=3 loops=1979)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13139
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.625..0.625 rows=1 loops=1979)
                       Buffers: shared hit=33149 read=35197 dirtied=442 written=46
                       ->  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=0.058..0.603 rows=30 loops=1979)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60126
                             Buffers: shared hit=33149 read=35197 dirtied=442 written=46
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.625..0.625 rows=1 loops=1979)
                       Buffers: shared hit=33149 read=35197 dirtied=442 written=46
                       ->  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=0.058..0.603 rows=30 loops=1979)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60126
                             Buffers: shared hit=33149 read=35197 dirtied=442 written=46
 Total runtime: 1332.210 ms
(26 rows)

COMMIT;
COMMIT