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 = 'VIETNAM'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1962460.70..1962460.70 rows=1 width=26) (actual time=51674.675..51674.693 rows=100 loops=1)
   Buffers: shared hit=13942183 read=598991 written=5637
   ->  Sort  (cost=1962460.70..1962460.70 rows=1 width=26) (actual time=51674.671..51674.677 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13942183 read=598991 written=5637
         ->  HashAggregate  (cost=1962460.68..1962460.69 rows=1 width=26) (actual time=51672.099..51673.490 rows=3987 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13942175 read=598991 written=5637
               ->  Nested Loop Anti Join  (cost=2443.74..1962460.67 rows=1 width=26) (actual time=28.121..51578.815 rows=39316 loops=1)
                     Buffers: shared hit=13942175 read=598991 written=5637
                     ->  Nested Loop Semi Join  (cost=2443.17..1962459.36 rows=1 width=34) (actual time=26.014..48049.896 rows=704527 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10412772 read=597464 written=5617
                           ->  Nested Loop  (cost=2442.61..1440487.80 rows=390631 width=38) (actual time=25.972..42295.595 rows=731034 loops=1)
                                 Buffers: shared hit=6828674 read=520297 written=4861
                                 ->  Hash Join  (cost=2442.17..1016485.17 rows=805397 width=34) (actual time=25.937..32274.910 rows=1514310 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=790137 read=493231 written=4811
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..930483.65 rows=20134919 width=8) (actual time=0.131..21308.503 rows=37966100 loops=1)
                                             Buffers: shared hit=788288 read=493218 written=4811
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=25.726..25.726 rows=3987 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 282kB
                                             Buffers: shared hit=1846 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.817..23.487 rows=3987 loops=1)
                                                   Buffers: shared hit=1846 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.012..0.017 rows=1 loops=1)
                                                         Filter: (n_name = 'VIETNAM'::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=1.793..21.918 rows=3987 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=1.420..1.420 rows=3987 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=13
                                 ->  Index Scan using orders_o_orderkey_o_orderdate_idx on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.006..0.006 rows=0 loops=1514310)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6038537 read=27066 written=50
                           ->  Index Scan using lineitem_l_orderkey_idx on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.007..0.007 rows=1 loops=731034)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3584098 read=77167 written=756
                     ->  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=704527)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3529403 read=1527 written=20
 Planning time: 16.088 ms
 Execution time: 51675.213 ms
(54 rows)

COMMIT;
COMMIT