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 = 'ALGERIA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1951038.83..1951038.84 rows=1 width=26) (actual time=45142.666..45142.686 rows=100 loops=1)
   Buffers: shared hit=13988895 read=332973 dirtied=39 written=3844
   ->  Sort  (cost=1951038.83..1951038.84 rows=1 width=26) (actual time=45142.663..45142.669 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13988895 read=332973 dirtied=39 written=3844
         ->  HashAggregate  (cost=1951038.81..1951038.82 rows=1 width=26) (actual time=45139.661..45141.505 rows=3934 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13988887 read=332973 dirtied=39 written=3844
               ->  Nested Loop Anti Join  (cost=2443.74..1951038.81 rows=1 width=26) (actual time=20.995..45050.592 rows=39113 loops=1)
                     Buffers: shared hit=13988887 read=332973 dirtied=39 written=3844
                     ->  Nested Loop Semi Join  (cost=2443.17..1951037.50 rows=1 width=34) (actual time=20.869..41668.338 rows=694229 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10510083 read=332456 dirtied=39 written=3841
                           ->  Nested Loop  (cost=2442.61..1431785.89 rows=388642 width=38) (actual time=20.786..36181.206 rows=720499 loops=1)
                                 Buffers: shared hit=6961305 read=273345 dirtied=39 written=2917
                                 ->  Hash Join  (cost=2442.17..1010779.66 rows=799780 width=34) (actual time=20.757..26722.877 rows=1490036 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=1036408 read=229923 dirtied=39 written=2036
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..925283.66 rows=20015091 width=8) (actual time=0.044..18081.942 rows=37928797 loops=1)
                                             Buffers: shared hit=1034688 read=229782 dirtied=39 written=2036
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=20.642..20.642 rows=3934 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 278kB
                                             Buffers: shared hit=1717 read=141
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.225..18.284 rows=3934 loops=1)
                                                   Buffers: shared hit=1717 read=141
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.007..0.020 rows=1 loops=1)
                                                         Filter: (n_name = 'ALGERIA'::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=1.212..17.034 rows=3934 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1845
                                                         Buffers: shared hit=1716 read=141
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.881..0.881 rows=3934 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared hit=1 read=11
                                 ->  Index Scan using pk_orders on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.005..0.006 rows=0 loops=1490036)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5924897 read=43422 written=881
                           ->  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=720499)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3548778 read=59111 written=924
                     ->  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=694229)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3478804 read=517 written=3
 Planning time: 9.622 ms
 Execution time: 45143.035 ms
(54 rows)

COMMIT;
COMMIT