BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-10-01'
	and o_orderdate < cast(date '1994-10-01' + 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=1301373.82..1301373.83 rows=1 width=16) (actual time=89373.712..89373.713 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=889774 read=635649 dirtied=1368 written=13076
   ->  HashAggregate  (cost=1301373.80..1301373.81 rows=1 width=16) (actual time=89373.565..89373.566 rows=5 loops=1)
         Buffers: shared hit=889769 read=635649 dirtied=1368 written=13076
         ->  Hash Join  (cost=1029847.30..1300584.29 rows=157902 width=16) (actual time=79138.111..89152.613 rows=527003 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=889769 read=635649 dirtied=1368 written=13076
               ->  Bitmap Heap Scan on orders  (cost=12714.51..277802.77 rows=585417 width=20) (actual time=581.294..2270.809 rows=574828 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-10-01'::date) AND (o_orderdate < '1995-01-01'::date))
                     Buffers: shared hit=214039 read=18703
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12568.16 rows=585417 width=0) (actual time=438.581..438.581 rows=581242 loops=1)
                           Index Cond: ((o_orderdate >= '1994-10-01'::date) AND (o_orderdate < '1995-01-01'::date))
                           Buffers: shared read=1665
               ->  Hash  (cost=1000072.68..1000072.68 rows=1364808 width=4) (actual time=78555.199..78555.199 rows=13767238 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484005kB
                     Buffers: shared hit=675730 read=616946 dirtied=1368 written=13076
                     ->  HashAggregate  (cost=986424.60..1000072.68 rows=1364808 width=4) (actual time=64878.332..74773.771 rows=13767238 loops=1)
                           Buffers: shared hit=675730 read=616946 dirtied=1368 written=13076
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..935837.47 rows=20234855 width=4) (actual time=0.225..28888.413 rows=37966174 loops=1)
                                 Buffers: shared hit=675730 read=616946 dirtied=1368 written=13076
 Total runtime: 89605.904 ms
(23 rows)

COMMIT;
COMMIT