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#52'
	and p_container = 'MED PACK'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=351642.15..351642.16 rows=1 width=4) (actual time=744.885..744.885 rows=1 loops=1)
   Buffers: shared hit=55240 read=30720 dirtied=54
   ->  Nested Loop  (cost=130.19..351592.59 rows=19825 width=4) (actual time=0.819..743.824 rows=5540 loops=1)
         Buffers: shared hit=55240 read=30720 dirtied=54
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7817.22 rows=1979 width=4) (actual time=0.114..32.962 rows=2060 loops=1)
               Index Cond: ((p_container = 'MED PACK'::bpchar) AND (p_brand = 'Brand#52'::bpchar))
               Heap Fetches: 2060
               Buffers: shared hit=3 read=2030
         ->  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=2060)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13820
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.336..0.336 rows=1 loops=2060)
                       Buffers: shared hit=41417 read=28690 dirtied=54
                       ->  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=0.035..0.327 rows=30 loops=2060)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61566
                             Buffers: shared hit=41417 read=28690 dirtied=54
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.336..0.336 rows=1 loops=2060)
                       Buffers: shared hit=41417 read=28690 dirtied=54
                       ->  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=0.035..0.327 rows=30 loops=2060)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 61566
                             Buffers: shared hit=41417 read=28690 dirtied=54
 Planning time: 3.269 ms
 Execution time: 745.053 ms
(27 rows)

COMMIT;
COMMIT