BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-05-01'
	and o_orderdate < cast(date '1994-05-01' + 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=1301538.21..1301538.22 rows=1 width=16) (actual time=102707.873..102707.873 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1241159 read=279680 written=6170
   ->  HashAggregate  (cost=1301538.19..1301538.20 rows=1 width=16) (actual time=102707.724..102707.725 rows=5 loops=1)
         Buffers: shared hit=1241154 read=279680 written=6170
         ->  Hash Join  (cost=1029943.38..1300768.79 rows=153880 width=16) (actual time=87834.686..102333.332 rows=526406 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1241154 read=279680 written=6170
               ->  Bitmap Heap Scan on orders  (cost=12577.27..277823.05 rows=579052 width=20) (actual time=623.546..3520.331 rows=573946 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-05-01'::date) AND (o_orderdate < '1994-08-01'::date))
                     Buffers: shared hit=228991 read=3693
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12432.51 rows=579052 width=0) (actual time=491.425..491.425 rows=581478 loops=1)
                           Index Cond: ((o_orderdate >= '1994-05-01'::date) AND (o_orderdate < '1994-08-01'::date))
                           Buffers: shared hit=2 read=1664
               ->  Hash  (cost=1000541.25..1000541.25 rows=1345988 width=4) (actual time=87208.801..87208.801 rows=13753463 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483521kB
                     Buffers: shared hit=1012163 read=275987 written=6170
                     ->  HashAggregate  (cost=987081.37..1000541.25 rows=1345988 width=4) (actual time=72158.889..82279.200 rows=13753463 loops=1)
                           Buffers: shared hit=1012163 read=275987 written=6170
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..936422.27 rows=20263643 width=4) (actual time=0.118..35400.078 rows=37928434 loops=1)
                                 Buffers: shared hit=1012163 read=275987 written=6170
 Total runtime: 102998.677 ms
(23 rows)

COMMIT;
COMMIT