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#31'
	and p_container = 'MED BOX'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=350225.29..350225.30 rows=1 width=4) (actual time=694.692..694.693 rows=1 loops=1)
   Buffers: shared hit=52330 read=31252 dirtied=137 written=16
   ->  Nested Loop  (cost=130.19..350175.73 rows=19824 width=4) (actual time=0.702..693.758 rows=5472 loops=1)
         Buffers: shared hit=52330 read=31252 dirtied=137 written=16
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7784.60 rows=1971 width=4) (actual time=0.145..28.367 rows=2000 loops=1)
               Index Cond: ((p_container = 'MED BOX'::bpchar) AND (p_brand = 'Brand#31'::bpchar))
               Heap Fetches: 2000
               Buffers: shared hit=315 read=1651
         ->  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=2000)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13520
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.323..0.323 rows=1 loops=2000)
                       Buffers: shared hit=38495 read=29601 dirtied=137 written=16
                       ->  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=0.034..0.315 rows=30 loops=2000)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59791
                             Buffers: shared hit=38495 read=29601 dirtied=137 written=16
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.323..0.323 rows=1 loops=2000)
                       Buffers: shared hit=38495 read=29601 dirtied=137 written=16
                       ->  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=0.034..0.315 rows=30 loops=2000)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59791
                             Buffers: shared hit=38495 read=29601 dirtied=137 written=16
 Planning time: 3.338 ms
 Execution time: 694.875 ms
(27 rows)

COMMIT;
COMMIT