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 = 'WRAP BOX'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                        QUERY PLAN                                                                                         
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=118284.62..118284.63 rows=1 width=4) (actual time=205.120..205.121 rows=1 loops=1)
   Buffers: shared hit=78082 read=5566 dirtied=83
   ->  Nested Loop  (cost=83.46..118232.50 rows=20848 width=4) (actual time=1.649..203.724 rows=5585 loops=1)
         Buffers: shared hit=78082 read=5566 dirtied=83
         ->  Bitmap Heap Scan on part  (cost=73.70..6843.78 rows=2075 width=4) (actual time=1.252..29.440 rows=2077 loops=1)
               Recheck Cond: ((p_container = 'WRAP BOX'::bpchar) AND (p_brand = 'Brand#52'::bpchar))
               Heap Blocks: exact=2023
               Buffers: shared hit=597 read=1441
               ->  Bitmap Index Scan on part_p_container_p_brand_p_partkey_idx  (cost=0.00..73.18 rows=2075 width=0) (actual time=0.923..0.923 rows=2077 loops=1)
                     Index Cond: ((p_container = 'WRAP BOX'::bpchar) AND (p_brand = 'Brand#52'::bpchar))
                     Buffers: shared read=15
         ->  Index Scan using lineitem_l_partkey_l_quantity_idx on lineitem  (cost=9.76..53.58 rows=10 width=12) (actual time=0.016..0.039 rows=3 loops=2077)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=11449 read=2476
               SubPlan 1
                 ->  Aggregate  (cost=9.19..9.20 rows=1 width=4) (actual time=0.042..0.042 rows=1 loops=2077)
                       Buffers: shared hit=66036 read=1649 dirtied=83
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_idx on lineitem lineitem_1  (cost=0.56..9.11 rows=31 width=4) (actual time=0.021..0.037 rows=30 loops=2077)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 561
                             Buffers: shared hit=66036 read=1649 dirtied=83
               SubPlan 1
                 ->  Aggregate  (cost=9.19..9.20 rows=1 width=4) (actual time=0.042..0.042 rows=1 loops=2077)
                       Buffers: shared hit=66036 read=1649 dirtied=83
                       ->  Index Only Scan using lineitem_l_partkey_l_quantity_idx on lineitem lineitem_1  (cost=0.56..9.11 rows=31 width=4) (actual time=0.021..0.037 rows=30 loops=2077)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 561
                             Buffers: shared hit=66036 read=1649 dirtied=83
 Planning time: 2.514 ms
 Execution time: 205.278 ms
(30 rows)

COMMIT;
COMMIT