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#53'
	and p_container = 'WRAP PKG'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=359796.66..359796.67 rows=1 width=4) (actual time=688.727..688.727 rows=1 loops=1)
   Buffers: shared hit=55181 read=28333 dirtied=39 written=1417
   ->  Nested Loop  (cost=130.19..359745.86 rows=20319 width=4) (actual time=1.063..687.729 rows=5213 loops=1)
         Buffers: shared hit=55181 read=28333 dirtied=39 written=1417
         ->  Index Only Scan using part_p_container_p_brand_p_partkey_idx on part  (cost=0.43..7994.41 rows=2025 width=4) (actual time=0.163..31.340 rows=2005 loops=1)
               Index Cond: ((p_container = 'WRAP PKG'::bpchar) AND (p_brand = 'Brand#53'::bpchar))
               Heap Fetches: 2005
               Buffers: shared hit=174 read=1806 written=73
         ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=129.76..173.60 rows=10 width=12) (actual time=0.005..0.007 rows=3 loops=2005)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=13274
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.317..0.317 rows=1 loops=2005)
                       Buffers: shared hit=41733 read=26527 dirtied=39 written=1344
                       ->  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=0.033..0.309 rows=30 loops=2005)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59959
                             Buffers: shared hit=41733 read=26527 dirtied=39 written=1344
               SubPlan 1
                 ->  Aggregate  (cost=129.19..129.20 rows=1 width=4) (actual time=0.317..0.317 rows=1 loops=2005)
                       Buffers: shared hit=41733 read=26527 dirtied=39 written=1344
                       ->  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=0.033..0.309 rows=30 loops=2005)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 59959
                             Buffers: shared hit=41733 read=26527 dirtied=39 written=1344
 Planning time: 2.739 ms
 Execution time: 688.932 ms
(27 rows)

COMMIT;
COMMIT