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 '%mint%'
	) as profit
group by
	nation,
	o_year
order by
	nation,
	o_year desc;
                                                                                           QUERY PLAN                                                                                            
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 GroupAggregate  (cost=1388012.46..1388018.06 rows=160 width=46) (actual time=129848.293..133079.228 rows=175 loops=1)
   Group Key: nation.n_name, (date_part('year'::text, (orders.o_orderdate)::timestamp without time zone))
   Buffers: shared hit=35557586 read=2409176 dirtied=9695 written=15121
   ->  Sort  (cost=1388012.46..1388012.86 rows=160 width=46) (actual time=129833.597..130816.066 rows=3261582 loops=1)
         Sort Key: nation.n_name, (date_part('year'::text, (orders.o_orderdate)::timestamp without time zone))
         Sort Method: quicksort  Memory: 556964kB
         Buffers: shared hit=35557586 read=2409176 dirtied=9695 written=15121
         ->  Hash Join  (cost=67176.63..1388006.60 rows=160 width=46) (actual time=1531.476..118232.270 rows=3261582 loops=1)
               Hash Cond: (supplier.s_nationkey = nation.n_nationkey)
               Buffers: shared hit=35557578 read=2409176 dirtied=9695 written=15121
               ->  Nested Loop  (cost=67175.07..1388002.04 rows=160 width=24) (actual time=1531.397..113977.740 rows=3261582 loops=1)
                     Buffers: shared hit=35557574 read=2409176 dirtied=9695 written=15121
                     ->  Nested Loop  (cost=67174.63..1387924.49 rows=160 width=24) (actual time=1531.293..61544.624 rows=3261582 loops=1)
                           Buffers: shared hit=23238507 read=1664041 dirtied=9689 written=11108
                           ->  Nested Loop  (cost=67174.34..1387872.87 rows=160 width=28) (actual time=1531.278..47208.021 rows=3261582 loops=1)
                                 Buffers: shared hit=13435479 read=1664041 dirtied=9689 written=11108
                                 ->  Hash Join  (cost=67173.77..353417.45 rows=528568 width=16) (actual time=1531.213..6796.318 rows=434676 loops=1)
                                       Hash Cond: (partsupp.ps_partkey = part.p_partkey)
                                       Buffers: shared hit=54835 read=156645 written=747
                                       ->  Seq Scan on partsupp  (cost=0.00..250958.00 rows=8000000 width=12) (actual time=0.010..3042.053 rows=8000000 loops=1)
                                             Buffers: shared hit=54833 read=116125 written=678
                                       ->  Hash  (cost=65522.00..65522.00 rows=132142 width=4) (actual time=1528.844..1528.844 rows=108669 loops=1)
                                             Buckets: 262144  Batches: 1  Memory Usage: 5869kB
                                             Buffers: shared hit=2 read=40520 written=69
                                             ->  Seq Scan on part  (cost=0.00..65522.00 rows=132142 width=4) (actual time=0.028..1458.244 rows=108669 loops=1)
                                                   Filter: ((p_name)::text ~~ '%mint%'::text)
                                                   Rows Removed by Filter: 1891331
                                                   Buffers: shared hit=2 read=40520 written=69
                                 ->  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..0.090 rows=8 loops=434676)
                                       Index Cond: (l_partkey = partsupp.ps_partkey)
                                       Filter: (partsupp.ps_suppkey = l_suppkey)
                                       Rows Removed by Filter: 23
                                       Buffers: shared hit=13380644 read=1507396 dirtied=9689 written=10361
                           ->  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=3261582)
                                 Index Cond: (s_suppkey = lineitem.l_suppkey)
                                 Buffers: shared hit=9803028
                     ->  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..0.015 rows=1 loops=3261582)
                           Index Cond: (o_orderkey = lineitem.l_orderkey)
                           Heap Fetches: 3261582
                           Buffers: shared hit=12319067 read=745135 dirtied=6 written=4013
               ->  Hash  (cost=1.25..1.25 rows=25 width=30) (actual time=0.031..0.031 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..0.013 rows=25 loops=1)
                           Buffers: shared hit=1
 Planning time: 55.870 ms
 Execution time: 133119.344 ms
(47 rows)

COMMIT;
COMMIT