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#15'
	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=357849.25..357849.26 rows=1 width=4) (actual time=710.808..710.808 rows=1 loops=1)
   Buffers: shared hit=58182 read=28223 dirtied=218
   ->  Nested Loop  (cost=130.19..357798.66 rows=20236 width=4) (actual time=0.700..709.845 rows=5481 loops=1)
         Buffers: shared hit=58182 read=28223 dirtied=218
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7953.41 rows=2014 width=4) (actual time=0.124..29.167 rows=2058 loops=1)
               Index Cond: ((p_container = 'JUMBO BAG'::bpchar) AND (p_brand = 'Brand#15'::bpchar))
               Heap Fetches: 2058
               Buffers: shared hit=477 read=1555
         ->  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=2058)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13761
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.320..0.321 rows=1 loops=2058)
                       Buffers: shared hit=43944 read=26668 dirtied=218
                       ->  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=0.033..0.312 rows=30 loops=2058)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62044
                             Buffers: shared hit=43944 read=26668 dirtied=218
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.320..0.321 rows=1 loops=2058)
                       Buffers: shared hit=43944 read=26668 dirtied=218
                       ->  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=0.033..0.312 rows=30 loops=2058)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62044
                             Buffers: shared hit=43944 read=26668 dirtied=218
 Planning time: 2.812 ms
 Execution time: 711.000 ms
(27 rows)

COMMIT;
COMMIT