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#42'
	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=345079.17..345079.18 rows=1 width=4) (actual time=497.367..497.367 rows=1 loops=1)
   Buffers: shared hit=76093 read=11066
   ->  Nested Loop  (cost=130.19..345030.58 rows=19435 width=4) (actual time=1.048..496.426 rows=5648 loops=1)
         Buffers: shared hit=76093 read=11066
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7672.54 rows=1942 width=4) (actual time=0.161..29.856 rows=2077 loops=1)
               Index Cond: ((p_container = 'JUMBO BAG'::bpchar) AND (p_brand = 'Brand#42'::bpchar))
               Heap Fetches: 2077
               Buffers: shared hit=7 read=2042
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.62 rows=10 width=12) (actual time=0.004..0.005 rows=3 loops=2077)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13994
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.216..0.216 rows=1 loops=2077)
                       Buffers: shared hit=62092 read=9024
                       ->  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=0.028..0.209 rows=30 loops=2077)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62491
                             Buffers: shared hit=62092 read=9024
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.216..0.216 rows=1 loops=2077)
                       Buffers: shared hit=62092 read=9024
                       ->  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=0.028..0.209 rows=30 loops=2077)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 62491
                             Buffers: shared hit=62092 read=9024
 Planning time: 4.893 ms
 Execution time: 497.653 ms
(27 rows)

COMMIT;
COMMIT