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 = 'GERMANY'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1952672.94..1952672.94 rows=1 width=26) (actual time=49394.845..49394.864 rows=100 loops=1)
   Buffers: shared hit=13886436 read=821599 written=4307
   ->  Sort  (cost=1952672.94..1952672.94 rows=1 width=26) (actual time=49394.842..49394.850 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13886436 read=821599 written=4307
         ->  HashAggregate  (cost=1952672.92..1952672.93 rows=1 width=26) (actual time=49392.285..49393.604 rows=4049 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13886428 read=821599 written=4307
               ->  Nested Loop Anti Join  (cost=2443.74..1952672.91 rows=1 width=26) (actual time=25.605..49315.445 rows=40109 loops=1)
                     Buffers: shared hit=13886428 read=821599 written=4307
                     ->  Nested Loop Semi Join  (cost=2443.17..1952671.61 rows=1 width=34) (actual time=24.724..45905.393 rows=714540 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10307370 read=819559 written=4298
                           ->  Nested Loop  (cost=2442.61..1433336.65 rows=388697 width=38) (actual time=24.688..39634.697 rows=741509 loops=1)
                                 Buffers: shared hit=6757025 read=656195 written=3209
                                 ->  Hash Join  (cost=2442.17..1011465.62 rows=801411 width=34) (actual time=24.631..29373.047 rows=1534240 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=707814 read=559975 written=2587
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..925877.67 rows=20035263 width=8) (actual time=0.183..20523.909 rows=37928740 loops=1)
                                             Buffers: shared hit=705978 read=559963 written=2587
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=24.303..24.303 rows=4049 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 286kB
                                             Buffers: shared hit=1833 read=12
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.779..22.226 rows=4049 loops=1)
                                                   Buffers: shared hit=1833 read=12
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.018..0.029 rows=1 loops=1)
                                                         Filter: (n_name = 'GERMANY'::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=1.746..20.775 rows=4049 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1831
                                                         Buffers: shared hit=1832 read=12
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=1.381..1.381 rows=4049 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared hit=1 read=12
                                 ->  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=1534240)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6049211 read=96220 written=622
                           ->  Index Scan using lineitem_l_orderkey_idx on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.008..0.008 rows=1 loops=741509)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3550345 read=163364 written=1089
                     ->  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=714540)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3579058 read=2040 written=9
 Planning time: 16.476 ms
 Execution time: 49395.507 ms
(54 rows)

COMMIT;
COMMIT