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 = 'MED DRUM'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=353954.23..353954.24 rows=1 width=4) (actual time=673.163..673.163 rows=1 loops=1)
   Buffers: shared hit=59323 read=25259 dirtied=214 written=6
   ->  Nested Loop  (cost=130.19..353903.99 rows=20094 width=4) (actual time=0.829..672.153 rows=5345 loops=1)
         Buffers: shared hit=59323 read=25259 dirtied=214 written=6
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7869.47 rows=1992 width=4) (actual time=0.136..30.519 rows=2013 loops=1)
               Index Cond: ((p_container = 'MED DRUM'::bpchar) AND (p_brand = 'Brand#54'::bpchar))
               Heap Fetches: 2013
               Buffers: shared hit=141 read=1843 written=1
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.005..0.006 rows=3 loops=2013)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13451
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.309..0.310 rows=1 loops=2013)
                       Buffers: shared hit=45731 read=23416 dirtied=214 written=5
                       ->  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=0.033..0.302 rows=30 loops=2013)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60782
                             Buffers: shared hit=45731 read=23416 dirtied=214 written=5
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.309..0.310 rows=1 loops=2013)
                       Buffers: shared hit=45731 read=23416 dirtied=214 written=5
                       ->  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=0.033..0.302 rows=30 loops=2013)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60782
                             Buffers: shared hit=45731 read=23416 dirtied=214 written=5
 Planning time: 2.949 ms
 Execution time: 673.330 ms
(27 rows)

COMMIT;
COMMIT