BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	s_name,
	count(*) as numwait
from
	supplier,
	lineitem l1,
	orders,
	nation
where
	s_suppkey = l1.l_suppkey
	and o_orderkey = l1.l_orderkey
	and o_orderstatus = 'F'
	and l1.l_receiptdate > l1.l_commitdate
	and exists (
		select
			*
		from
			lineitem l2
		where
			l2.l_orderkey = l1.l_orderkey
			and l2.l_suppkey <> l1.l_suppkey
	)
	and not exists (
		select
			*
		from
			lineitem l3
		where
			l3.l_orderkey = l1.l_orderkey
			and l3.l_suppkey <> l1.l_suppkey
			and l3.l_receiptdate > l3.l_commitdate
	)
	and s_nationkey = n_nationkey
	and n_name = 'UNITED STATES'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1970464.34..1970464.34 rows=1 width=26) (actual time=47238.272..47238.291 rows=100 loops=1)
   Buffers: shared hit=13806428 read=795899 dirtied=618 written=8498
   ->  Sort  (cost=1970464.34..1970464.34 rows=1 width=26) (actual time=47238.269..47238.276 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13806428 read=795899 dirtied=618 written=8498
         ->  HashAggregate  (cost=1970464.32..1970464.33 rows=1 width=26) (actual time=47235.749..47237.100 rows=4004 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13806420 read=795899 dirtied=618 written=8498
               ->  Nested Loop Anti Join  (cost=2443.74..1970464.31 rows=1 width=26) (actual time=18.146..47158.989 rows=40080 loops=1)
                     Buffers: shared hit=13806420 read=795899 dirtied=618 written=8498
                     ->  Nested Loop Semi Join  (cost=2443.17..1970463.00 rows=1 width=34) (actual time=17.480..44154.477 rows=707630 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10262025 read=793782 dirtied=618 written=8479
                           ->  Nested Loop  (cost=2442.61..1444994.88 rows=393224 width=38) (actual time=17.373..38457.720 rows=734308 loops=1)
                                 Buffers: shared hit=6739238 read=639484 dirtied=618 written=7209
                                 ->  Hash Join  (cost=2442.17..1019718.37 rows=807779 width=34) (actual time=17.229..29313.270 rows=1519647 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=716330 read=575599 dirtied=618 written=6207
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..933468.14 rows=20194890 width=8) (actual time=0.117..20215.522 rows=37927594 loops=1)
                                             Buffers: shared hit=714468 read=575586 dirtied=618 written=6206
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=17.007..17.007 rows=4004 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 283kB
                                             Buffers: shared hit=1859 read=13 written=1
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.338..15.883 rows=4004 loops=1)
                                                   Buffers: shared hit=1859 read=13 written=1
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.013..0.014 rows=1 loops=1)
                                                         Filter: (n_name = 'UNITED STATES'::bpchar)
                                                         Rows Removed by Filter: 24
                                                         Buffers: shared hit=1
                                                   ->  Bitmap Heap Scan on supplier  (cost=79.29..2350.29 rows=4000 width=34) (actual time=1.319..15.051 rows=4004 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1858
                                                         Buffers: shared hit=1858 read=13 written=1
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=1.017..1.017 rows=4004 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=13 written=1
                                 ->  Index Scan using orders_o_orderkey_o_orderdate_idx on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.005..0.005 rows=0 loops=1519647)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6022908 read=63885 written=1002
                           ->  Index Scan using pk_lineitem on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.007..0.007 rows=1 loops=734308)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3522787 read=154298 written=1270
                     ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l3  (cost=0.56..0.91 rows=5 width=8) (actual time=0.004..0.004 rows=1 loops=707630)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3544395 read=2117 written=19
 Planning time: 10.562 ms
 Execution time: 47238.667 ms
(54 rows)

COMMIT;
COMMIT