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#41'
	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=357140.64..357140.65 rows=1 width=4) (actual time=562.949..562.949 rows=1 loops=1)
   Buffers: shared hit=65302 read=19266 dirtied=342 written=66
   ->  Nested Loop  (cost=130.19..357089.95 rows=20276 width=4) (actual time=0.642..562.086 rows=5462 loops=1)
         Buffers: shared hit=65302 read=19266 dirtied=342 written=66
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7937.32 rows=2010 width=4) (actual time=0.116..24.954 rows=2003 loops=1)
               Index Cond: ((p_container = 'JUMBO CAN'::bpchar) AND (p_brand = 'Brand#41'::bpchar))
               Heap Fetches: 2003
               Buffers: shared hit=552 read=1422 written=3
         ->  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=2003)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13508
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.259..0.259 rows=1 loops=2003)
                       Buffers: shared hit=51242 read=17844 dirtied=342 written=63
                       ->  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=0.029..0.252 rows=30 loops=2003)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60772
                             Buffers: shared hit=51242 read=17844 dirtied=342 written=63
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.259..0.259 rows=1 loops=2003)
                       Buffers: shared hit=51242 read=17844 dirtied=342 written=63
                       ->  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=0.029..0.252 rows=30 loops=2003)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60772
                             Buffers: shared hit=51242 read=17844 dirtied=342 written=63
 Planning time: 2.800 ms
 Execution time: 563.130 ms
(27 rows)

COMMIT;
COMMIT