BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-09-01'
	and o_orderdate < cast(date '1997-09-01' + interval '3 month' as date)
	and exists (
		select
			*
		from
			lineitem
		where
			l_orderkey = o_orderkey
			and l_commitdate < l_receiptdate
	)
group by
	o_orderpriority
order by
	o_orderpriority;
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=1296946.88..1296946.89 rows=1 width=16) (actual time=104772.077..104772.078 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=824253 read=700174 dirtied=298 written=19478
   ->  HashAggregate  (cost=1296946.86..1296946.87 rows=1 width=16) (actual time=104771.914..104771.918 rows=5 loops=1)
         Buffers: shared hit=824248 read=700174 dirtied=298 written=19478
         ->  Hash Join  (cost=1026408.82..1296185.17 rows=152338 width=16) (actual time=87751.318..104359.768 rows=519160 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=824248 read=700174 dirtied=298 written=19478
               ->  Bitmap Heap Scan on orders  (cost=12543.49..276757.11 rows=577708 width=20) (actual time=666.863..6388.350 rows=566483 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-09-01'::date) AND (o_orderdate < '1997-12-01'::date))
                     Buffers: shared hit=204020 read=26922 written=292
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12399.06 rows=577708 width=0) (actual time=543.788..543.788 rows=571423 loops=1)
                           Index Cond: ((o_orderdate >= '1997-09-01'::date) AND (o_orderdate < '1997-12-01'::date))
                           Buffers: shared hit=2 read=1634 written=292
               ->  Hash  (cost=997236.13..997236.13 rows=1330336 width=4) (actual time=87082.306..87082.306 rows=13753384 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483518kB
                     Buffers: shared hit=620228 read=673252 dirtied=298 written=19186
                     ->  HashAggregate  (cost=983932.77..997236.13 rows=1330336 width=4) (actual time=72997.152..82021.589 rows=13753384 loops=1)
                           Buffers: shared hit=620228 read=673252 dirtied=298 written=19186
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..933462.86 rows=20187964 width=4) (actual time=0.227..39251.682 rows=37927367 loops=1)
                                 Buffers: shared hit=620228 read=673252 dirtied=298 written=19186
 Total runtime: 105018.539 ms
(23 rows)

COMMIT;
COMMIT