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 = 'UNITED KINGDOM'
group by
	s_name
order by
	numwait desc,
	s_name
LIMIT 100;
                                                                                                 QUERY PLAN                                                                                                 
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Limit  (cost=1960511.59..1960511.59 rows=1 width=26) (actual time=45845.869..45845.890 rows=100 loops=1)
   Buffers: shared hit=13711955 read=765367 dirtied=1253 written=246
   ->  Sort  (cost=1960511.59..1960511.59 rows=1 width=26) (actual time=45845.865..45845.870 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13711955 read=765367 dirtied=1253 written=246
         ->  HashAggregate  (cost=1960511.57..1960511.58 rows=1 width=26) (actual time=45842.310..45844.540 rows=3973 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13711947 read=765367 dirtied=1253 written=246
               ->  Nested Loop Anti Join  (cost=2443.74..1960511.56 rows=1 width=26) (actual time=18.187..45773.394 rows=39545 loops=1)
                     Buffers: shared hit=13711947 read=765367 dirtied=1253 written=246
                     ->  Nested Loop Semi Join  (cost=2443.17..1960510.25 rows=1 width=34) (actual time=17.466..43035.754 rows=700515 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10203171 read=763233 dirtied=1253 written=243
                           ->  Nested Loop  (cost=2442.61..1439063.98 rows=390246 width=38) (actual time=17.446..37707.026 rows=726780 loops=1)
                                 Buffers: shared hit=6699581 read=626605 dirtied=1251 written=223
                                 ->  Hash Join  (cost=2442.17..1015486.29 rows=804603 width=34) (actual time=17.425..28979.396 rows=1506671 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=705310 read=585981 dirtied=999 written=212
                                       ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l1  (cost=0.56..929567.17 rows=20115063 width=8) (actual time=0.093..20106.332 rows=37966560 loops=1)
                                             Buffers: shared hit=703447 read=585968 dirtied=999 written=212
                                       ->  Hash  (cost=2391.61..2391.61 rows=4000 width=30) (actual time=17.210..17.210 rows=3973 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 281kB
                                             Buffers: shared hit=1860 read=13
                                             ->  Nested Loop  (cost=79.29..2391.61 rows=4000 width=30) (actual time=1.316..15.997 rows=3973 loops=1)
                                                   Buffers: shared hit=1860 read=13
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.012..0.016 rows=1 loops=1)
                                                         Filter: (n_name = 'UNITED KINGDOM'::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=1.298..15.197 rows=3973 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Heap Blocks: exact=1859
                                                         Buffers: shared hit=1859 read=13
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_idx  (cost=0.00..78.29 rows=4000 width=0) (actual time=0.989..0.989 rows=3973 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=0.005..0.005 rows=0 loops=1506671)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5994271 read=40624 dirtied=252 written=11
                           ->  Index Scan using lineitem_l_orderkey_idx on lineitem l2  (cost=0.56..1.15 rows=15 width=8) (actual time=0.006..0.006 rows=1 loops=726780)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3503590 read=136628 dirtied=2 written=20
                     ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem l3  (cost=0.56..0.91 rows=5 width=8) (actual time=0.003..0.003 rows=1 loops=700515)
                           Index Cond: (l_orderkey = l1.l_orderkey)
                           Filter: (l_suppkey <> l1.l_suppkey)
                           Rows Removed by Filter: 0
                           Buffers: shared hit=3508776 read=2134 written=3
 Planning time: 11.169 ms
 Execution time: 45846.334 ms
(54 rows)

COMMIT;
COMMIT