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=2877569.97..2877569.97 rows=1 width=26) (actual time=41555.288..41555.304 rows=100 loops=1)
   Buffers: shared hit=13510623 read=677298 written=369
   ->  Sort  (cost=2877569.97..2877569.97 rows=1 width=26) (actual time=41555.286..41555.292 rows=100 loops=1)
         Sort Key: (count(*)), supplier.s_name
         Sort Method: top-N heapsort  Memory: 32kB
         Buffers: shared hit=13510623 read=677298 written=369
         ->  HashAggregate  (cost=2877569.95..2877569.96 rows=1 width=26) (actual time=41553.044..41554.140 rows=3945 loops=1)
               Group Key: supplier.s_name
               Buffers: shared hit=13510615 read=677298 written=369
               ->  Nested Loop Anti Join  (cost=2406.88..2877569.94 rows=1 width=26) (actual time=43.478..41497.902 rows=38931 loops=1)
                     Buffers: shared hit=13510615 read=677298 written=369
                     ->  Nested Loop Semi Join  (cost=2406.31..2877568.16 rows=1 width=34) (actual time=42.143..38679.494 rows=696735 loops=1)
                           Join Filter: (orders.o_orderkey = l2.l_orderkey)
                           Buffers: shared hit=10014350 read=674838 written=363
                           ->  Nested Loop  (cost=2405.75..2351156.45 rows=393906 width=38) (actual time=42.114..33735.093 rows=722872 loops=1)
                                 Buffers: shared hit=6537442 read=531807 written=53
                                 ->  Hash Join  (cost=2405.31..1925281.11 rows=808881 width=34) (actual time=41.990..26262.993 rows=1494939 loops=1)
                                       Hash Cond: (l1.l_suppkey = supplier.s_suppkey)
                                       Buffers: shared hit=567387 read=514058 written=15
                                       ->  Seq Scan on lineitem l1  (cost=0.00..1838829.99 rows=20255200 width=8) (actual time=0.014..19100.564 rows=37928434 loops=1)
                                             Filter: (l_receiptdate > l_commitdate)
                                             Rows Removed by Filter: 22057104
                                             Buffers: shared hit=565202 read=514058 written=15
                                       ->  Hash  (cost=2355.31..2355.31 rows=4000 width=30) (actual time=41.931..41.931 rows=3945 loops=1)
                                             Buckets: 4096  Batches: 1  Memory Usage: 279kB
                                             Buffers: shared hit=2182
                                             ->  Nested Loop  (cost=43.00..2355.31 rows=4000 width=30) (actual time=0.286..40.726 rows=3945 loops=1)
                                                   Buffers: shared hit=2182
                                                   ->  Seq Scan on nation  (cost=0.00..1.31 rows=1 width=4) (actual time=0.005..0.010 rows=1 loops=1)
                                                         Filter: (n_name = 'ETHIOPIA'::bpchar)
                                                         Rows Removed by Filter: 24
                                                         Buffers: shared hit=1
                                                   ->  Bitmap Heap Scan on supplier  (cost=43.00..2314.00 rows=4000 width=34) (actual time=0.275..40.095 rows=3945 loops=1)
                                                         Recheck Cond: (s_nationkey = nation.n_nationkey)
                                                         Rows Removed by Index Recheck: 96055
                                                         Heap Blocks: lossy=2179
                                                         Buffers: shared hit=2181
                                                         ->  Bitmap Index Scan on supplier_s_nationkey_s_suppkey_brin_idx  (cost=0.00..42.00 rows=4000 width=0) (actual time=0.258..0.258 rows=23040 loops=1)
                                                               Index Cond: (s_nationkey = nation.n_nationkey)
                                                               Buffers: shared hit=2
                                 ->  Index Scan using pk_orders on orders  (cost=0.43..0.52 rows=1 width=4) (actual time=0.004..0.004 rows=0 loops=1494939)
                                       Index Cond: (o_orderkey = l1.l_orderkey)
                                       Filter: (o_orderstatus = 'F'::bpchar)
                                       Rows Removed by Filter: 1
                                       Buffers: shared hit=5970055 read=17749 written=38
                           ->  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=722872)
                                 Index Cond: (l_orderkey = l1.l_orderkey)
                                 Filter: (l_suppkey <> l1.l_suppkey)
                                 Rows Removed by Filter: 0
                                 Buffers: shared hit=3476908 read=143031 written=310
                     ->  Index Scan using pk_lineitem on lineitem l3  (cost=0.56..1.15 rows=5 width=8) (actual time=0.004..0.004 rows=1 loops=696735)
                           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=3496265 read=2460 written=6
 Planning time: 9.034 ms
 Execution time: 41555.609 ms
(57 rows)

COMMIT;
COMMIT