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#53'
	and p_container = 'JUMBO PACK'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=363156.96..363156.98 rows=1 width=4) (actual time=650.140..650.141 rows=1 loops=1)
   Buffers: shared hit=48073 read=34416 dirtied=127
   ->  Nested Loop  (cost=130.19..363105.62 rows=20537 width=4) (actual time=0.642..649.137 rows=5341 loops=1)
         Buffers: shared hit=48073 read=34416 dirtied=127
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..8066.44 rows=2044 width=4) (actual time=0.111..22.731 rows=1966 loops=1)
               Index Cond: ((p_container = 'JUMBO PACK'::bpchar) AND (p_brand = 'Brand#53'::bpchar))
               Heap Fetches: 1966
               Buffers: shared hit=690 read=1253
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.60 rows=10 width=12) (actual time=0.005..0.006 rows=3 loops=1966)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13250
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.309..0.309 rows=1 loops=1966)
                       Buffers: shared hit=34133 read=33163 dirtied=127
                       ->  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=0.031..0.300 rows=30 loops=1966)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59147
                             Buffers: shared hit=34133 read=33163 dirtied=127
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.309..0.309 rows=1 loops=1966)
                       Buffers: shared hit=34133 read=33163 dirtied=127
                       ->  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=0.031..0.300 rows=30 loops=1966)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59147
                             Buffers: shared hit=34133 read=33163 dirtied=127
 Planning time: 2.865 ms
 Execution time: 650.301 ms
(27 rows)

COMMIT;
COMMIT