BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	s_name,
	s_address
from
	supplier,
	nation
where
	s_suppkey in (
		select
			distinct (ps_suppkey)
		from
			partsupp,
			part
		where
			ps_partkey=p_partkey
			and p_name like 'saddle%'
			and ps_availqty > (
				select
					0.5 * sum(l_quantity)
				from
					lineitem
				where
					l_partkey = ps_partkey
					and l_suppkey = ps_suppkey
					and l_shipdate >= '1997-01-01'
					and l_shipdate < cast(date '1997-01-01' + interval '1 year' as date)
			)
	)
	and s_nationkey = n_nationkey
	and n_name = 'CANADA'
order by
	s_name;
                                                                                                  QUERY PLAN                                                                                                   
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=12740755.70..12740758.64 rows=1175 width=51) (actual time=75766.321..75766.468 rows=1778 loops=1)
   Sort Key: supplier.s_name
   Sort Method: quicksort  Memory: 257kB
   Buffers: shared hit=2770989 read=384801 dirtied=4569 written=8893
   ->  Nested Loop  (cost=12736286.07..12740695.78 rows=1175 width=51) (actual time=75413.645..75745.172 rows=1778 loops=1)
         Join Filter: (supplier.s_nationkey = nation.n_nationkey)
         Rows Removed by Join Filter: 43331
         Buffers: shared hit=2770984 read=384801 dirtied=4569 written=8893
         ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.018..0.029 rows=1 loops=1)
               Filter: (n_name = 'CANADA'::bpchar)
               Rows Removed by Filter: 24
               Buffers: shared hit=1
         ->  Hash Semi Join  (cost=12736286.07..12740327.43 rows=29363 width=55) (actual time=75413.590..75736.279 rows=45109 loops=1)
               Hash Cond: (supplier.s_suppkey = partsupp.ps_suppkey)
               Buffers: shared hit=2770983 read=384801 dirtied=4569 written=8893
               ->  Seq Scan on supplier  (cost=0.00..3179.00 rows=100000 width=59) (actual time=0.035..88.111 rows=100000 loops=1)
                     Buffers: shared hit=2179
               ->  Hash  (cost=12735919.03..12735919.03 rows=29363 width=4) (actual time=75413.493..75413.493 rows=45109 loops=1)
                     Buckets: 4096  Batches: 1  Memory Usage: 1586kB
                     Buffers: shared hit=2768804 read=384801 dirtied=4569 written=8893
                     ->  HashAggregate  (cost=12735331.77..12735625.40 rows=29363 width=4) (actual time=75371.774..75400.091 rows=45109 loops=1)
                           Buffers: shared hit=2768804 read=384801 dirtied=4569 written=8893
                           ->  Nested Loop  (cost=0.00..12735258.36 rows=29363 width=4) (actual time=1.603..75150.282 rows=59862 loops=1)
                                 Buffers: shared hit=2768804 read=384801 dirtied=4569 written=8893
                                 ->  Seq Scan on part  (cost=0.00..65522.00 rows=22022 width=4) (actual time=0.026..3546.242 rows=22008 loops=1)
                                       Filter: ((p_name)::text ~~ 'saddle%'::text)
                                       Rows Removed by Filter: 1977992
                                       Buffers: shared hit=7285 read=33237 written=782
                                 ->  Index Scan using pk_partsupp on partsupp  (cost=0.00..575.31 rows=1 width=8) (actual time=2.097..3.247 rows=3 loops=22008)
                                       Index Cond: (ps_partkey = part.p_partkey)
                                       Filter: ((ps_availqty)::double precision > (SubPlan 1))
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=2761519 read=351564 dirtied=4569 written=8111
                                       SubPlan 1
                                         ->  Aggregate  (cost=140.92..140.94 rows=1 width=4) (actual time=0.774..0.774 rows=1 loops=88032)
                                               Buffers: shared hit=2690195 read=332003 dirtied=4569 written=7717
                                               ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.92 rows=1 width=4) (actual time=0.490..0.770 rows=1 loops=88032)
                                                     Index Cond: (l_partkey = partsupp.ps_partkey)
                                                     Filter: ((l_shipdate >= '1997-01-01'::date) AND (l_shipdate < '1998-01-01'::date) AND (l_suppkey = partsupp.ps_suppkey))
                                                     Rows Removed by Filter: 29
                                                     Buffers: shared hit=2690195 read=332003 dirtied=4569 written=7717
 Total runtime: 75768.483 ms
(42 rows)

COMMIT;
COMMIT