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 = 'JUMBO CAN'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=352537.70..352537.71 rows=1 width=4) (actual time=789.144..789.144 rows=1 loops=1)
   Buffers: shared hit=48102 read=33481 dirtied=465 written=1
   ->  Nested Loop  (cost=130.19..352487.42 rows=20113 width=4) (actual time=0.748..788.208 rows=5266 loops=1)
         Buffers: shared hit=48102 read=33481 dirtied=465 written=1
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7837.64 rows=1984 width=4) (actual time=0.135..14.648 rows=1934 loops=1)
               Index Cond: ((p_container = 'JUMBO CAN'::bpchar) AND (p_brand = 'Brand#51'::bpchar))
               Heap Fetches: 1934
               Buffers: shared hit=1820 read=77
         ->  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=1934)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13047
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.390..0.390 rows=1 loops=1934)
                       Buffers: shared hit=33235 read=33404 dirtied=465 written=1
                       ->  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=0.039..0.382 rows=30 loops=1934)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58602
                             Buffers: shared hit=33235 read=33404 dirtied=465 written=1
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.390..0.390 rows=1 loops=1934)
                       Buffers: shared hit=33235 read=33404 dirtied=465 written=1
                       ->  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=0.039..0.382 rows=30 loops=1934)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58602
                             Buffers: shared hit=33235 read=33404 dirtied=465 written=1
 Planning time: 3.071 ms
 Execution time: 789.366 ms
(27 rows)

COMMIT;
COMMIT