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 = 'JUMBO PKG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=350403.65..350403.66 rows=1 width=4) (actual time=720.184..720.184 rows=1 loops=1)
   Buffers: shared hit=49131 read=33684 dirtied=124
   ->  Nested Loop  (cost=130.19..350354.11 rows=19814 width=4) (actual time=0.713..719.241 rows=5253 loops=1)
         Buffers: shared hit=49131 read=33684 dirtied=124
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7789.42 rows=1972 width=4) (actual time=0.124..26.405 rows=1977 loops=1)
               Index Cond: ((p_container = 'JUMBO PKG'::bpchar) AND (p_brand = 'Brand#52'::bpchar))
               Heap Fetches: 1977
               Buffers: shared hit=523 read=1418
         ->  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..0.007 rows=3 loops=1977)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13218
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.340..0.340 rows=1 loops=1977)
                       Buffers: shared hit=35390 read=32266 dirtied=124
                       ->  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..0.332 rows=30 loops=1977)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59453
                             Buffers: shared hit=35390 read=32266 dirtied=124
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.340..0.340 rows=1 loops=1977)
                       Buffers: shared hit=35390 read=32266 dirtied=124
                       ->  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..0.332 rows=30 loops=1977)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59453
                             Buffers: shared hit=35390 read=32266 dirtied=124
 Planning time: 3.023 ms
 Execution time: 720.356 ms
(27 rows)

COMMIT;
COMMIT