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#54'
	and p_container = 'WRAP PACK'
	and l_quantity < (
		select
			0.2 * avg(l_quantity)
		from
			lineitem
		where
			l_partkey = p_partkey
	);
                                                                                        QUERY PLAN                                                                                         
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Aggregate  (cost=112715.04..112715.05 rows=1 width=4) (actual time=160.385..160.385 rows=1 loops=1)
   Buffers: shared hit=75751 read=2955 dirtied=79
   ->  Nested Loop  (cost=78.45..112665.50 rows=19815 width=4) (actual time=1.606..159.352 rows=5228 loops=1)
         Buffers: shared hit=75751 read=2955 dirtied=79
         ->  Bitmap Heap Scan on part  (cost=68.68..6551.70 rows=1976 width=4) (actual time=1.225..13.415 rows=1959 loops=1)
               Recheck Cond: ((p_container = 'WRAP PACK'::bpchar) AND (p_brand = 'Brand#54'::bpchar))
               Heap Blocks: exact=1910
               Buffers: shared hit=1910 read=15
               ->  Bitmap Index Scan on part_p_container_p_brand_p_partkey_idx  (cost=0.00..68.19 rows=1976 width=0) (actual time=0.919..0.919 rows=1959 loops=1)
                     Index Cond: ((p_container = 'WRAP PACK'::bpchar) AND (p_brand = 'Brand#54'::bpchar))
                     Buffers: shared read=15
         ->  Index Scan using lineitem_l_partkey_l_quantity_idx on lineitem  (cost=9.76..53.60 rows=10 width=12) (actual time=0.013..0.029 rows=3 loops=1959)
               Index Cond: ((l_partkey = part.p_partkey) AND (l_quantity < (SubPlan 1)))
               Buffers: shared hit=12021 read=1071
               SubPlan 1
                 ->  Aggregate  (cost=9.19..9.20 rows=1 width=4) (actual time=0.043..0.043 rows=1 loops=1959)
                       Buffers: shared hit=61820 read=1869 dirtied=79
                       ->  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=0.023..0.037 rows=30 loops=1959)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 284
                             Buffers: shared hit=61820 read=1869 dirtied=79
               SubPlan 1
                 ->  Aggregate  (cost=9.19..9.20 rows=1 width=4) (actual time=0.043..0.043 rows=1 loops=1959)
                       Buffers: shared hit=61820 read=1869 dirtied=79
                       ->  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=0.023..0.037 rows=30 loops=1959)
                             Index Cond: (l_partkey = part.p_partkey)
                             Heap Fetches: 284
                             Buffers: shared hit=61820 read=1869 dirtied=79
 Planning time: 2.343 ms
 Execution time: 160.540 ms
(30 rows)

COMMIT;
COMMIT