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 'snow%'
			and ps_availqty > (
				select
					0.5 * sum(l_quantity)
				from
					lineitem
				where
					l_partkey = ps_partkey
					and l_suppkey = ps_suppkey
					and l_shipdate >= '1994-01-01'
					and l_shipdate < cast(date '1994-01-01' + interval '1 year' as date)
			)
	)
	and s_nationkey = n_nationkey
	and n_name = 'ARGENTINA'
order by
	s_name;
                                                                                                  QUERY PLAN                                                                                                   
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=12748208.03..12748210.97 rows=1175 width=51) (actual time=83528.226..83528.440 rows=1802 loops=1)
   Sort Key: supplier.s_name
   Sort Method: quicksort  Memory: 258kB
   Buffers: shared hit=2716521 read=399457 dirtied=5784 written=3300
   ->  Nested Loop  (cost=12743737.88..12748148.11 rows=1175 width=51) (actual time=83181.497..83512.854 rows=1802 loops=1)
         Join Filter: (supplier.s_nationkey = nation.n_nationkey)
         Rows Removed by Join Filter: 42976
         Buffers: shared hit=2716516 read=399457 dirtied=5784 written=3300
         ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.011..0.027 rows=1 loops=1)
               Filter: (n_name = 'ARGENTINA'::bpchar)
               Rows Removed by Filter: 24
               Buffers: shared hit=1
         ->  Hash Semi Join  (cost=12743737.88..12747779.55 rows=29380 width=55) (actual time=83181.479..83504.744 rows=44778 loops=1)
               Hash Cond: (supplier.s_suppkey = partsupp.ps_suppkey)
               Buffers: shared hit=2716515 read=399457 dirtied=5784 written=3300
               ->  Seq Scan on supplier  (cost=0.00..3179.00 rows=100000 width=59) (actual time=0.796..108.701 rows=100000 loops=1)
                     Buffers: shared hit=2179
               ->  Hash  (cost=12743370.63..12743370.63 rows=29380 width=4) (actual time=83180.626..83180.626 rows=44778 loops=1)
                     Buckets: 4096  Batches: 1  Memory Usage: 1575kB
                     Buffers: shared hit=2714336 read=399457 dirtied=5784 written=3300
                     ->  HashAggregate  (cost=12742783.03..12743076.83 rows=29380 width=4) (actual time=83140.480..83168.297 rows=44778 loops=1)
                           Buffers: shared hit=2714336 read=399457 dirtied=5784 written=3300
                           ->  Nested Loop  (cost=0.00..12742709.58 rows=29380 width=4) (actual time=0.940..82917.492 rows=58988 loops=1)
                                 Buffers: shared hit=2714336 read=399457 dirtied=5784 written=3300
                                 ->  Seq Scan on part  (cost=0.00..65522.00 rows=22035 width=4) (actual time=0.071..2990.512 rows=21713 loops=1)
                                       Filter: ((p_name)::text ~~ 'snow%'::text)
                                       Rows Removed by Filter: 1978287
                                       Buffers: shared hit=15350 read=25172 written=152
                                 ->  Index Scan using pk_partsupp on partsupp  (cost=0.00..575.31 rows=1 width=8) (actual time=2.323..3.675 rows=3 loops=21713)
                                       Index Cond: (ps_partkey = part.p_partkey)
                                       Filter: ((ps_availqty)::double precision > (SubPlan 1))
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=2698986 read=374285 dirtied=5784 written=3148
                                       SubPlan 1
                                         ->  Aggregate  (cost=140.92..140.94 rows=1 width=4) (actual time=0.876..0.876 rows=1 loops=86852)
                                               Buffers: shared hit=2629927 read=353791 dirtied=5784 written=2809
                                               ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.92 rows=1 width=4) (actual time=0.560..0.871 rows=1 loops=86852)
                                                     Index Cond: (l_partkey = partsupp.ps_partkey)
                                                     Filter: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1995-01-01'::date) AND (l_suppkey = partsupp.ps_suppkey))
                                                     Rows Removed by Filter: 29
                                                     Buffers: shared hit=2629927 read=353791 dirtied=5784 written=2809
 Total runtime: 83530.693 ms
(42 rows)

COMMIT;
COMMIT