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#51'
	and p_container = 'SM PACK'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=354832.70..354832.71 rows=1 width=4) (actual time=724.773..724.773 rows=1 loops=1)
   Buffers: shared hit=47534 read=37231 dirtied=181
   ->  Nested Loop  (cost=130.19..354782.53 rows=20065 width=4) (actual time=0.734..723.750 rows=5436 loops=1)
         Buffers: shared hit=47534 read=37231 dirtied=181
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7885.56 rows=1997 width=4) (actual time=0.132..32.048 rows=2018 loops=1)
               Index Cond: ((p_container = 'SM PACK'::bpchar) AND (p_brand = 'Brand#51'::bpchar))
               Heap Fetches: 2018
               Buffers: shared read=1980
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.61 rows=10 width=12) (actual time=0.005..0.006 rows=3 loops=2018)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13547
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.333..0.333 rows=1 loops=2018)
                       Buffers: shared hit=33987 read=35251 dirtied=181
                       ->  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=0.034..0.325 rows=30 loops=2018)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60877
                             Buffers: shared hit=33987 read=35251 dirtied=181
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.333..0.333 rows=1 loops=2018)
                       Buffers: shared hit=33987 read=35251 dirtied=181
                       ->  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=0.034..0.325 rows=30 loops=2018)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 60877
                             Buffers: shared hit=33987 read=35251 dirtied=181
 Planning time: 3.036 ms
 Execution time: 724.940 ms
(27 rows)

COMMIT;
COMMIT