BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	nation,
	o_year,
	sum(amount) as sum_profit
from
	(
		select
			n_name as nation,
			extract(year from o_orderdate) as o_year,
			l_extendedprice * (1 - l_discount) - ps_supplycost * l_quantity as amount
		from
			part,
			supplier,
			lineitem,
			partsupp,
			orders,
			nation
		where
			s_suppkey = l_suppkey
			and ps_suppkey = l_suppkey
			and ps_partkey = l_partkey
			and p_partkey = l_partkey
			and o_orderkey = l_orderkey
			and s_nationkey = n_nationkey
			and p_name like '%pink%'
	) as profit
group by
	nation,
	o_year
order by
	nation,
	o_year desc;
                                                                                           QUERY PLAN                                                                                            
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 GroupAggregate  (cost=1262411.62..1262416.55 rows=141 width=46) (actual time=127278.751..130309.970 rows=175 loops=1)
   Group Key: nation.n_name, (date_part('year'::text, (orders.o_orderdate)::timestamp without time zone))
   Buffers: shared hit=35658772 read=2432355 dirtied=14387 written=14940
   ->  Sort  (cost=1262411.62..1262411.97 rows=141 width=46) (actual time=127267.856..128112.170 rows=3272558 loops=1)
         Sort Key: nation.n_name, (date_part('year'::text, (orders.o_orderdate)::timestamp without time zone))
         Sort Method: quicksort  Memory: 558508kB
         Buffers: shared hit=35658772 read=2432355 dirtied=14387 written=14940
         ->  Hash Join  (cost=66976.27..1262406.58 rows=141 width=46) (actual time=1134.139..117162.738 rows=3272558 loops=1)
               Hash Cond: (supplier.s_nationkey = nation.n_nationkey)
               Buffers: shared hit=35658764 read=2432355 dirtied=14387 written=14940
               ->  Nested Loop  (cost=66974.71..1262402.38 rows=141 width=24) (actual time=1134.062..113745.480 rows=3272558 loops=1)
                     Buffers: shared hit=35658760 read=2432355 dirtied=14387 written=14940
                     ->  Nested Loop  (cost=66974.27..1262334.04 rows=141 width=24) (actual time=1133.973..59639.600 rows=3272558 loops=1)
                           Buffers: shared hit=23357528 read=1625553 dirtied=13935 written=9451
                           ->  Nested Loop  (cost=66973.98..1262288.54 rows=141 width=28) (actual time=1133.960..46381.813 rows=3272558 loops=1)
                                 Buffers: shared hit=13521778 read=1625553 dirtied=13935 written=9451
                                 ->  Hash Join  (cost=66973.41..352575.93 rows=464452 width=16) (actual time=1133.844..6686.081 rows=435752 loops=1)
                                       Hash Cond: (partsupp.ps_partkey = part.p_partkey)
                                       Buffers: shared hit=65614 read=145866 written=751
                                       ->  Seq Scan on partsupp  (cost=0.00..250958.00 rows=8000000 width=12) (actual time=0.017..3228.618 rows=8000000 loops=1)
                                             Buffers: shared hit=60692 read=110266 written=724
                                       ->  Hash  (cost=65522.00..65522.00 rows=116113 width=4) (actual time=1133.149..1133.149 rows=108938 loops=1)
                                             Buckets: 131072  Batches: 1  Memory Usage: 4854kB
                                             Buffers: shared hit=4922 read=35600 written=27
                                             ->  Seq Scan on part  (cost=0.00..65522.00 rows=116113 width=4) (actual time=0.023..1088.390 rows=108938 loops=1)
                                                   Filter: ((p_name)::text ~~ '%pink%'::text)
                                                   Rows Removed by Filter: 1891062
                                                   Buffers: shared hit=4922 read=35600 written=27
                                 ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.56..1.95 rows=1 width=24) (actual time=0.018..0.088 rows=8 loops=435752)
                                       Index Cond: (l_partkey = partsupp.ps_partkey)
                                       Filter: (partsupp.ps_suppkey = l_suppkey)
                                       Rows Removed by Filter: 23
                                       Buffers: shared hit=13456164 read=1479687 dirtied=13935 written=8700
                           ->  Index Scan using pk_supplier on supplier  (cost=0.29..0.31 rows=1 width=8) (actual time=0.003..0.003 rows=1 loops=3272558)
                                 Index Cond: (s_suppkey = lineitem.l_suppkey)
                                 Buffers: shared hit=9835750
                     ->  Index Only Scan using orders_o_orderkey_o_orderdate_idx on orders  (cost=0.43..0.47 rows=1 width=8) (actual time=0.015..0.016 rows=1 loops=3272558)
                           Index Cond: (o_orderkey = lineitem.l_orderkey)
                           Heap Fetches: 3272558
                           Buffers: shared hit=12301232 read=806802 dirtied=452 written=5489
               ->  Hash  (cost=1.25..1.25 rows=25 width=30) (actual time=0.030..0.030 rows=25 loops=1)
                     Buckets: 1024  Batches: 1  Memory Usage: 10kB
                     Buffers: shared hit=1
                     ->  Seq Scan on nation  (cost=0.00..1.25 rows=25 width=30) (actual time=0.007..0.012 rows=25 loops=1)
                           Buffers: shared hit=1
 Planning time: 55.104 ms
 Execution time: 130389.783 ms
(47 rows)

COMMIT;
COMMIT