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 CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=401085.98..401086.00 rows=1 width=4) (actual time=4297.035..4297.036 rows=1 loops=1)
   Buffers: shared hit=45258 read=38505 dirtied=55
   ->  Nested Loop  (cost=140.78..401035.82 rows=20065 width=4) (actual time=6.667..4294.006 rows=5343 loops=1)
         Buffers: shared hit=45258 read=38505 dirtied=55
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7886.46 rows=1997 width=4) (actual time=0.494..139.311 rows=2003 loops=1)
               Index Cond: ((p_container = 'JUMBO CASE'::bpchar) AND (p_brand = 'Brand#44'::bpchar))
               Heap Fetches: 2003
               Buffers: shared hit=23 read=1948
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.77 rows=10 width=12) (actual time=0.106..0.145 rows=3 loops=2003)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13406
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.916..1.916 rows=1 loops=2003)
                       Buffers: shared hit=31829 read=36557 dirtied=55
                       ->  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=0.191..1.893 rows=30 loops=2003)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60061
                             Buffers: shared hit=31829 read=36557 dirtied=55
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.916..1.916 rows=1 loops=2003)
                       Buffers: shared hit=31829 read=36557 dirtied=55
                       ->  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=0.191..1.893 rows=30 loops=2003)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60061
                             Buffers: shared hit=31829 read=36557 dirtied=55
 Total runtime: 4297.334 ms
(26 rows)

COMMIT;
COMMIT