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#35'
	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=352712.15..352712.16 rows=1 width=4) (actual time=800.767..800.767 rows=1 loops=1)
   Buffers: shared hit=62069 read=25570 dirtied=235 written=28
   ->  Nested Loop  (cost=130.19..352662.14 rows=20004 width=4) (actual time=0.958..799.756 rows=5675 loops=1)
         Buffers: shared hit=62069 read=25570 dirtied=235 written=28
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7841.65 rows=1985 width=4) (actual time=0.169..16.934 rows=2084 loops=1)
               Index Cond: ((p_container = 'MED DRUM'::bpchar) AND (p_brand = 'Brand#35'::bpchar))
               Heap Fetches: 2084
               Buffers: shared hit=1968 read=93
         ->  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..0.007 rows=3 loops=2084)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=14063
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.366..0.366 rows=1 loops=2084)
                       Buffers: shared hit=46038 read=25477 dirtied=235 written=28
                       ->  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=0.040..0.357 rows=30 loops=2084)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62853
                             Buffers: shared hit=46038 read=25477 dirtied=235 written=28
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.366..0.366 rows=1 loops=2084)
                       Buffers: shared hit=46038 read=25477 dirtied=235 written=28
                       ->  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=0.040..0.357 rows=30 loops=2084)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62853
                             Buffers: shared hit=46038 read=25477 dirtied=235 written=28
 Planning time: 3.671 ms
 Execution time: 800.980 ms
(27 rows)

COMMIT;
COMMIT