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 = 'SM CASE'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=393668.11..393668.12 rows=1 width=4) (actual time=2248.748..2248.748 rows=1 loops=1)
   Buffers: shared hit=51680 read=32228 dirtied=162
   ->  Nested Loop  (cost=140.78..393618.78 rows=19732 width=4) (actual time=1.579..2246.525 rows=5423 loops=1)
         Buffers: shared hit=51680 read=32228 dirtied=162
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.00..7740.61 rows=1960 width=4) (actual time=0.298..38.548 rows=1993 loops=1)
               Index Cond: ((p_container = 'SM CASE'::bpchar) AND (p_brand = 'Brand#22'::bpchar))
               Heap Fetches: 1993
               Buffers: shared hit=1951 read=15
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=140.78..196.78 rows=10 width=12) (actual time=0.044..0.057 rows=3 loops=1993)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13443
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.043..1.043 rows=1 loops=1993)
                       Buffers: shared hit=36286 read=32213 dirtied=162
                       ->  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=0.100..1.024 rows=30 loops=1993)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60224
                             Buffers: shared hit=36286 read=32213 dirtied=162
               SubPlan 1
                 ->  Aggregate  (cost=140.77..140.78 rows=1 width=4) (actual time=1.043..1.043 rows=1 loops=1993)
                       Buffers: shared hit=36286 read=32213 dirtied=162
                       ->  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=0.100..1.024 rows=30 loops=1993)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60224
                             Buffers: shared hit=36286 read=32213 dirtied=162
 Total runtime: 2249.020 ms
(26 rows)

COMMIT;
COMMIT