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 = 'KENYA'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1973907.51..1973907.51 rows=1 width=26) (actual time=44091.836..44091.855 rows=100 loops=1)
   Buffers: shared hit=14074247 read=670005 dirtied=88 written=4594
   ->  Sort  (cost=1973907.51..1973907.51 rows=1 width=26) (actual time=44091.833..44091.840 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=14074247 read=670005 dirtied=88 written=4594
         ->  HashAggregate  (cost=1973907.49..1973907.50 rows=1 width=26) (actual time=44088.575..44090.625 rows=4044 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=14074239 read=670005 dirtied=88 written=4594
               ->  Nested Loop Anti Join  (cost=2443.74..1973907.48 rows=1 width=26) (actual time=17.968..44017.440 rows=39689 loops=1)
                     Buffers: shared hit=14074239 read=670005 dirtied=88 written=4594
                     ->  Nested Loop Semi Join  (cost=2443.17..1973906.18 rows=1 width=34) (actual time=14.986..41030.511 rows=715249 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10491355 read=668310 dirtied=88 written=4584
                           ->  Nested Loop  (cost=2442.61..1446208.99 rows=394884 width=38) (actual time=14.959..35756.949 rows=742188 loops=1)
                                 Buffers: shared hit=6887221 read=555945 dirtied=88 written=3538
                                 ->  Hash Join  (cost=2442.17..1020493.17 rows=808602 width=34) (actual time=14.782..27417.023 rows=1536549 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=753234 read=535401 written=3340
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..934159.08 rows=20215058 width=8) (actual time=0.083..19264.690 rows=37965800 loops=1)
                                             Buffers: shared hit=751393 read=535388 written=3340
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=14.652..14.652 rows=4044 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 285kB
                                             Buffers: shared hit=1838 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.223..13.638 rows=4044 loops=1)
                                                   Buffers: shared hit=1838 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.009..0.016 rows=1 loops=1)
                                                         Filter: (n_name = 'KENYA'::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=1.206..12.838 rows=4044 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1837
                                                         Buffers: shared hit=1837 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.916..0.916 rows=4044 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared read=13
                                 ->  Index Scan using pk_orders on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.005..0.005 rows=0 loops=1536549)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=6133987 read=20544 dirtied=88 written=198
                           ->  Index Scan using pk_lineitem on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.006..0.006 rows=1 loops=742188)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3604134 read=112365 written=1046
                     ->  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=715249)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3582884 read=1695 written=10
 Planning time: 10.405 ms
 Execution time: 44092.221 ms
(54 rows)

COMMIT;
COMMIT