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 'cornflower%'
			and ps_availqty > (
				select
					0.5 * sum(l_quantity)
				from
					lineitem
				where
					l_partkey = ps_partkey
					and l_suppkey = ps_suppkey
					and l_shipdate >= '1996-01-01'
					and l_shipdate < cast(date '1996-01-01' + interval '1 year' as date)
			)
	)
	and s_nationkey = n_nationkey
	and n_name = 'VIETNAM'
order by
	s_name;
                                                                                                  QUERY PLAN                                                                                                   
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=12740736.73..12740739.65 rows=1168 width=51) (actual time=11582.862..11582.976 rows=1805 loops=1)
   Sort Key: supplier.s_name
   Sort Method: quicksort  Memory: 257kB
   Buffers: shared hit=2700275 read=416860 dirtied=5491 written=619
   ->  Nested Loop  (cost=12736272.49..12740677.22 rows=1168 width=51) (actual time=11458.871..11570.093 rows=1805 loops=1)
         Join Filter: (supplier.s_nationkey = nation.n_nationkey)
         Rows Removed by Join Filter: 42884
         Buffers: shared hit=2700270 read=416860 dirtied=5491 written=619
         ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.014..0.021 rows=1 loops=1)
               Filter: (n_name = 'VIETNAM'::bpchar)
               Rows Removed by Filter: 24
               Buffers: shared hit=1
         ->  Hash Semi Join  (cost=12736272.49..12740310.92 rows=29199 width=55) (actual time=11458.794..11565.236 rows=44689 loops=1)
               Hash Cond: (supplier.s_suppkey = partsupp.ps_suppkey)
               Buffers: shared hit=2700269 read=416860 dirtied=5491 written=619
               ->  Seq Scan on supplier  (cost=0.00..3179.00 rows=100000 width=59) (actual time=0.019..29.338 rows=100000 loops=1)
                     Buffers: shared hit=2179
               ->  Hash  (cost=12735907.50..12735907.50 rows=29199 width=4) (actual time=11458.736..11458.736 rows=44689 loops=1)
                     Buckets: 4096  Batches: 1  Memory Usage: 1572kB
                     Buffers: shared hit=2698090 read=416860 dirtied=5491 written=619
                     ->  HashAggregate  (cost=12735323.52..12735615.51 rows=29199 width=4) (actual time=11426.574..11448.162 rows=44689 loops=1)
                           Buffers: shared hit=2698090 read=416860 dirtied=5491 written=619
                           ->  Nested Loop  (cost=0.00..12735250.53 rows=29199 width=4) (actual time=0.672..11329.009 rows=59161 loops=1)
                                 Buffers: shared hit=2698090 read=416860 dirtied=5491 written=619
                                 ->  Seq Scan on part  (cost=0.00..65522.00 rows=22022 width=4) (actual time=0.009..916.495 rows=21761 loops=1)
                                       Filter: ((p_name)::text ~~ 'cornflower%'::text)
                                       Rows Removed by Filter: 1978239
                                       Buffers: shared hit=10361 read=30161 written=62
                                 ->  Index Scan using pk_partsupp on partsupp  (cost=0.00..575.31 rows=1 width=8) (actual time=0.392..0.476 rows=3 loops=21761)
                                       Index Cond: (ps_partkey = part.p_partkey)
                                       Filter: ((ps_availqty)::double precision > (SubPlan 1))
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=2687729 read=386699 dirtied=5491 written=557
                                       SubPlan 1
                                         ->  Aggregate  (cost=140.92..140.94 rows=1 width=4) (actual time=0.111..0.111 rows=1 loops=87044)
                                               Buffers: shared hit=2620279 read=364239 dirtied=5491 written=488
                                               ->  Index Scan using lineitem_l_partkey_l_quantity_l_shipmode_idx on lineitem  (cost=0.00..140.92 rows=1 width=4) (actual time=0.069..0.109 rows=1 loops=87044)
                                                     Index Cond: (l_partkey = partsupp.ps_partkey)
                                                     Filter: ((l_shipdate >= '1996-01-01'::date) AND (l_shipdate < '1997-01-01'::date) AND (l_suppkey = partsupp.ps_suppkey))
                                                     Rows Removed by Filter: 29
                                                     Buffers: shared hit=2620279 read=364239 dirtied=5491 written=488
 Total runtime: 11584.722 ms
(42 rows)

COMMIT;
COMMIT