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 'lace%'
			and ps_availqty > (
				select
					0.5 * sum(l_quantity)
				from
					lineitem
				where
					l_partkey = ps_partkey
					and l_suppkey = ps_suppkey
					and l_shipdate >= '1995-01-01'
					and l_shipdate < cast(date '1995-01-01' + interval '1 year' as date)
			)
	)
	and s_nationkey = n_nationkey
	and n_name = 'ARGENTINA'
order by
	s_name;
                                                                                            QUERY PLAN                                                                                             
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=10681374.04..10681376.69 rows=1063 width=51) (actual time=9785.209..9785.309 rows=1757 loops=1)
   Sort Key: supplier.s_name
   Sort Method: quicksort  Memory: 254kB
   Buffers: shared hit=2766062 read=356303 dirtied=2201 written=333
   ->  Hash Join  (cost=10680678.96..10681320.60 rows=1063 width=51) (actual time=9763.122..9783.111 rows=1757 loops=1)
         Hash Cond: (partsupp.ps_suppkey = supplier.s_suppkey)
         Buffers: shared hit=2766057 read=356303 dirtied=2201 written=333
         ->  HashAggregate  (cost=10678237.35..10678503.04 rows=26569 width=4) (actual time=9747.050..9759.828 rows=44738 loops=1)
               Group Key: partsupp.ps_suppkey
               Buffers: shared hit=2764211 read=356290 dirtied=2201 written=333
               ->  Nested Loop  (cost=0.86..10678170.93 rows=26569 width=4) (actual time=0.871..9677.233 rows=59109 loops=1)
                     Buffers: shared hit=2764211 read=356290 dirtied=2201 written=333
                     ->  Index Scan using pk_part on part  (cost=0.43..97473.43 rows=20020 width=4) (actual time=0.107..1116.524 rows=21785 loops=1)
                           Filter: ((p_name)::text ~~ 'lace%'::text)
                           Rows Removed by Filter: 1978215
                           Buffers: shared hit=6068 read=40673 written=38
                     ->  Index Scan using pk_partsupp on partsupp  (cost=0.43..528.50 rows=1 width=8) (actual time=0.329..0.391 rows=3 loops=21785)
                           Index Cond: (ps_partkey = part.p_partkey)
                           Filter: ((ps_availqty)::double precision > (SubPlan 1))
                           Rows Removed by Filter: 1
                           Buffers: shared hit=2758143 read=315617 dirtied=2201 written=295
                           SubPlan 1
                             ->  Aggregate  (cost=129.34..129.35 rows=1 width=4) (actual time=0.091..0.091 rows=1 loops=87140)
                                   Buffers: shared hit=2692347 read=291395 dirtied=2201 written=272
                                   ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.56..129.34 rows=1 width=4) (actual time=0.056..0.089 rows=1 loops=87140)
                                         Index Cond: (l_partkey = partsupp.ps_partkey)
                                         Filter: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate < '1996-01-01'::date) AND (l_suppkey = partsupp.ps_suppkey))
                                         Rows Removed by Filter: 29
                                         Buffers: shared hit=2692347 read=291395 dirtied=2201 written=272
         ->  Hash  (cost=2391.61..2391.61 rows=4000 width=55) (actual time=16.000..16.000 rows=4007 loops=1)
               Buckets: 4096  Batches: 1  Memory Usage: 382kB
               Buffers: shared hit=1846 read=13
               ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=55) (actual time=1.288..14.467 rows=4007 loops=1)
                     Buffers: shared hit=1846 read=13
                     ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.008..0.017 rows=1 loops=1)
                           Filter: (n_name = 'ARGENTINA'::bpchar)
                           Rows Removed by Filter: 24
                           Buffers: shared hit=1
                     ->  Bitmap Heap Scan on supplier  (cost=79.29..2350.29 rows=4000 width=59) (actual time=1.273..13.578 rows=4007 loops=1)
                           Recheck Cond: (s_nationkey = nation.n_nationkey)
                           Heap Blocks: exact=1845
                           Buffers: shared hit=1845 read=13
                           ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.970..0.970 rows=4007 loops=1)
                                 Index Cond: (s_nationkey = nation.n_nationkey)
                                 Buffers: shared read=13
 Planning time: 6.227 ms
 Execution time: 9786.383 ms
(47 rows)

COMMIT;
COMMIT