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#22'
	and p_container = 'WRAP PKG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=397677.74..397677.75 rows=1 width=4) (actual time=1028.520..1028.520 rows=1 loops=1)
   Buffers: shared hit=73498 read=11278 dirtied=76
   ->  Nested Loop  (cost=140.78..397628.15 rows=19835 width=4) (actual time=2.696..1027.016 rows=5417 loops=1)
         Buffers: shared hit=73498 read=11278 dirtied=76
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7820.98 rows=1980 width=4) (actual time=0.264..53.587 rows=2037 loops=1)
               Index Cond: ((p_container = 'WRAP PKG'::bpchar) AND (p_brand = 'Brand#22'::bpchar))
               Heap Fetches: 2037
               Buffers: shared hit=549 read=1461
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.77 rows=10 width=12) (actual time=0.023..0.025 rows=3 loops=2037)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13600
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.447..0.447 rows=1 loops=2037)
                       Buffers: shared hit=59349 read=9817 dirtied=76
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.69 rows=31 width=4) (actual time=0.053..0.435 rows=30 loops=2037)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60712
                             Buffers: shared hit=59349 read=9817 dirtied=76
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=0.447..0.447 rows=1 loops=2037)
                       Buffers: shared hit=59349 read=9817 dirtied=76
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.69 rows=31 width=4) (actual time=0.053..0.435 rows=30 loops=2037)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60712
                             Buffers: shared hit=59349 read=9817 dirtied=76
 Total runtime: 1028.804 ms
(26 rows)

COMMIT;
COMMIT