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#14'
	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=350578.20..350578.21 rows=1 width=4) (actual time=580.988..580.988 rows=1 loops=1)
   Buffers: shared hit=61080 read=25753 dirtied=128
   ->  Nested Loop  (cost=130.19..350528.79 rows=19765 width=4) (actual time=0.557..580.098 rows=5510 loops=1)
         Buffers: shared hit=61080 read=25753 dirtied=128
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7793.23 rows=1973 width=4) (actual time=0.097..28.192 rows=2069 loops=1)
               Index Cond: ((p_container = 'JUMBO BAG'::bpchar) AND (p_brand = 'Brand#14'::bpchar))
               Heap Fetches: 2069
               Buffers: shared read=2038
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.004..0.005 rows=3 loops=2069)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13825
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.259..0.259 rows=1 loops=2069)
                       Buffers: shared hit=47255 read=23715 dirtied=128
                       ->  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..0.251 rows=30 loops=2069)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62390
                             Buffers: shared hit=47255 read=23715 dirtied=128
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.259..0.259 rows=1 loops=2069)
                       Buffers: shared hit=47255 read=23715 dirtied=128
                       ->  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..0.251 rows=30 loops=2069)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62390
                             Buffers: shared hit=47255 read=23715 dirtied=128
 Planning time: 2.727 ms
 Execution time: 581.144 ms
(27 rows)

COMMIT;
COMMIT