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 = 'ETHIOPIA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                               QUERY PLAN                                                                                               
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=4832772.74..4832772.75 rows=1 width=26) (actual time=128137.320..128137.339 rows=100 loops=1)
   Buffers: shared hit=9626885 read=1803546 dirtied=1065 written=20733, temp read=161590 written=161584
   ->  Sort  (cost=4832772.74..4832772.75 rows=1 width=26) (actual time=128137.310..128137.318 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=9626885 read=1803546 dirtied=1065 written=20733, temp read=161590 written=161584
         ->  HashAggregate  (cost=4832772.72..4832772.73 rows=1 width=26) (actual time=128132.635..128134.396 rows=3945 loops=1)
               Buffers: shared hit=9626877 read=1803546 dirtied=1065 written=20733, temp read=161590 written=161584
               ->  Nested Loop Anti Join  (cost=2670352.70..4832772.72 rows=1 width=26) (actual time=45864.868..127997.883 rows=38998 loops=1)
                     Buffers: shared hit=9626877 read=1803546 dirtied=1065 written=20733, temp read=161590 written=161584
                     ->  Nested Loop  (cost=2670352.70..4832757.67 rows=1 width=34) (actual time=45861.496..113064.938 rows=697366 loops=1)
                           Join Filter: (l1.l_orderkey = orders.o_orderkey)
                           Buffers: shared hit=6756979 read=1170392 dirtied=1065 written=208, temp read=161590 written=161584
                           ->  Hash Semi Join  (cost=2670352.70..4832755.70 rows=1 width=38) (actual time=45861.035..99728.154 rows=1442982 loops=1)
                                 Hash Cond: (l1.l_orderkey = l2.l_orderkey)
                                 Join Filter: (l2.l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Join Filter: 374825
                                 Buffers: shared hit=996564 read=1151008 dirtied=1064 written=3, temp read=161590 written=161584
                                 ->  Hash Join  (cost=2441.58..1913904.00 rows=804524 width=34) (actual time=17.879..40364.014 rows=1496367 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=395119 read=679597 written=3
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1827911.62 rows=20134817 width=8) (actual time=0.035..26670.348 rows=37966100 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22079210
                                             Buffers: shared hit=393273 read=679583 written=3
                                       ->  Hash  (cost=2391.58..2391.58 rows=4000 width=30) (actual time=17.798..17.798 rows=3945 loops=1)
                                             Buckets: 1024  Batches: 1  Memory Usage: 247kB
                                             Buffers: shared hit=1843 read=14
                                             ->  Nested Loop  (cost=79.26..2391.58 rows=4000 width=30) (actual time=1.340..16.464 rows=3945 loops=1)
                                                   Buffers: shared hit=1843 read=14
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.007..0.014 rows=1 loops=1)
                                                         Filter: (n_name = 'ETHIOPIA'::bpchar)
                                                         Rows Removed by Filter: 24
                                                         Buffers: shared hit=1
                                                   ->  Bitmap Heap Scan on supplier  (cost=79.26..2350.26 rows=4000 width=34) (actual time=1.327..15.554 rows=3945 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Buffers: shared hit=1842 read=14
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.26 rows=4000 width=0) (actual time=1.023..1.023 rows=3945 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=14
                                 ->  Hash  (cost=1676900.50..1676900.50 rows=60404450 width=8) (actual time=45820.036..45820.036 rows=60045310 loops=1)
                                       Buckets: 4194304  Batches: 4  Memory Usage: 586609kB
                                       Buffers: shared hit=601445 read=471411 dirtied=1064, temp written=153904
                                       ->  Seq Scan on lineitem l2  (cost=0.00..1676900.50 rows=60404450 width=8) (actual time=0.030..22073.434 rows=60045310 loops=1)
                                             Buffers: shared hit=601445 read=471411 dirtied=1064
                           ->  Index Scan using pk_orders on orders  (cost=0.00..1.96 rows=1 width=4) (actual time=0.008..0.008 rows=0 loops=1442982)
                                 Index Cond: (o_orderkey = l2.l_orderkey)
                                 Filter: (o_orderstatus = 'F'::bpchar)
                                 Rows Removed by Filter: 1
                                 Buffers: shared hit=5760415 read=19384 dirtied=1 written=205
                     ->  Index Scan using lineitem_l_orderkey_idx on lineitem l3  (cost=0.00..7.50 rows=5 width=8) (actual time=0.021..0.021 rows=1 loops=697366)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: ((l_receiptdate > l_commitdate) AND (l_suppkey <> l1.l_suppkey))
                           Rows Removed by Filter: 1
                           Buffers: shared hit=2869898 read=633154 written=20525
 Total runtime: 128138.742 ms
(56 rows)

COMMIT;
COMMIT