BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-11-01'
	and o_orderdate < cast(date '1994-11-01' + 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=1289017.83..1289017.84 rows=1 width=16) (actual time=96856.274..96856.275 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=758546 read=748409 dirtied=1327 written=9089
   ->  HashAggregate  (cost=1289017.81..1289017.82 rows=1 width=16) (actual time=96856.100..96856.102 rows=5 loops=1)
         Buffers: shared hit=758541 read=748409 dirtied=1327 written=9089
         ->  Hash Join  (cost=1019855.27..1288228.04 rows=157955 width=16) (actual time=82475.195..96533.297 rows=527977 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=758541 read=748409 dirtied=1327 written=9089
               ->  Bitmap Heap Scan on orders  (cost=12329.56..275084.88 rows=581821 width=20) (actual time=466.617..3617.971 rows=575696 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-11-01'::date) AND (o_orderdate < '1995-02-01'::date))
                     Buffers: shared hit=93321 read=137225 dirtied=182 written=6539
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12184.11 rows=581821 width=0) (actual time=354.049..354.049 rows=576903 loops=1)
                           Index Cond: ((o_orderdate >= '1994-11-01'::date) AND (o_orderdate < '1995-02-01'::date))
                           Buffers: shared hit=98 read=1478 written=169
               ->  Hash  (cost=990507.13..990507.13 rows=1361486 width=4) (actual time=82006.844..82006.844 rows=13767168 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484002kB
                     Buffers: shared hit=665220 read=611184 dirtied=1145 written=2550
                     ->  HashAggregate  (cost=976892.27..990507.13 rows=1361486 width=4) (actual time=66955.326..77107.640 rows=13767168 loops=1)
                           Buffers: shared hit=665220 read=611184 dirtied=1145 written=2550
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..926754.54 rows=20055092 width=4) (actual time=0.184..26522.216 rows=37966418 loops=1)
                                 Buffers: shared hit=665220 read=611184 dirtied=1145 written=2550
 Total runtime: 97161.499 ms
(23 rows)

COMMIT;
COMMIT