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#44'
	and p_container = 'JUMBO PKG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=399886.12..399886.13 rows=1 width=4) (actual time=3898.882..3898.882 rows=1 loops=1)
   Buffers: shared hit=55783 read=25492 dirtied=61
   ->  Nested Loop  (cost=140.78..399836.20 rows=19965 width=4) (actual time=5.438..3895.366 rows=5245 loops=1)
         Buffers: shared hit=55783 read=25492 dirtied=61
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7866.35 rows=1991 width=4) (actual time=0.464..153.943 rows=1933 loops=1)
               Index Cond: ((p_container = 'JUMBO PKG'::bpchar) AND (p_brand = 'Brand#44'::bpchar))
               Heap Fetches: 1933
               Buffers: shared hit=451 read=1465
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.77 rows=10 width=12) (actual time=0.100..0.130 rows=3 loops=1933)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13018
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.794..1.794 rows=1 loops=1933)
                       Buffers: shared hit=42314 read=24027 dirtied=61
                       ->  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=0.210..1.772 rows=30 loops=1933)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58303
                             Buffers: shared hit=42314 read=24027 dirtied=61
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.794..1.794 rows=1 loops=1933)
                       Buffers: shared hit=42314 read=24027 dirtied=61
                       ->  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=0.210..1.772 rows=30 loops=1933)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 58303
                             Buffers: shared hit=42314 read=24027 dirtied=61
 Total runtime: 3899.250 ms
(26 rows)

COMMIT;
COMMIT