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#52'
	and p_container = 'JUMBO BAG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=357671.16..357671.17 rows=1 width=4) (actual time=800.000..800.000 rows=1 loops=1)
   Buffers: shared hit=52313 read=32137 dirtied=131 written=28
   ->  Nested Loop  (cost=130.19..357620.55 rows=20246 width=4) (actual time=0.804..799.111 rows=5383 loops=1)
         Buffers: shared hit=52313 read=32137 dirtied=131 written=28
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7949.39 rows=2013 width=4) (actual time=0.157..33.604 rows=2014 loops=1)
               Index Cond: ((p_container = 'JUMBO BAG'::bpchar) AND (p_brand = 'Brand#52'::bpchar))
               Heap Fetches: 2014
               Buffers: shared hit=120 read=1853 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..0.007 rows=3 loops=2014)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13495
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.370..0.370 rows=1 loops=2014)
                       Buffers: shared hit=38698 read=30284 dirtied=131 written=25
                       ->  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=0.038..0.361 rows=30 loops=2014)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60605
                             Buffers: shared hit=38698 read=30284 dirtied=131 written=25
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.370..0.370 rows=1 loops=2014)
                       Buffers: shared hit=38698 read=30284 dirtied=131 written=25
                       ->  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=0.038..0.361 rows=30 loops=2014)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60605
                             Buffers: shared hit=38698 read=30284 dirtied=131 written=25
 Planning time: 3.315 ms
 Execution time: 800.167 ms
(27 rows)

COMMIT;
COMMIT