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 = 'MED PKG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=358553.69..358553.70 rows=1 width=4) (actual time=712.094..712.094 rows=1 loops=1)
   Buffers: shared hit=57515 read=25881 dirtied=58 written=6
   ->  Nested Loop  (cost=130.19..358503.10 rows=20236 width=4) (actual time=0.912..711.121 rows=5283 loops=1)
         Buffers: shared hit=57515 read=25881 dirtied=58 written=6
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7966.28 rows=2018 width=4) (actual time=0.162..32.437 rows=1986 loops=1)
               Index Cond: ((p_container = 'MED PKG'::bpchar) AND (p_brand = 'Brand#51'::bpchar))
               Heap Fetches: 1986
               Buffers: shared hit=259 read=1701
         ->  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=1986)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13284
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.332..0.332 rows=1 loops=1986)
                       Buffers: shared hit=43972 read=24180 dirtied=58 written=6
                       ->  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=0.037..0.324 rows=30 loops=1986)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59873
                             Buffers: shared hit=43972 read=24180 dirtied=58 written=6
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.332..0.332 rows=1 loops=1986)
                       Buffers: shared hit=43972 read=24180 dirtied=58 written=6
                       ->  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=0.037..0.324 rows=30 loops=1986)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59873
                             Buffers: shared hit=43972 read=24180 dirtied=58 written=6
 Planning time: 3.551 ms
 Execution time: 712.268 ms
(27 rows)

COMMIT;
COMMIT