BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-07-01'
	and o_orderdate < cast(date '1993-07-01' + 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=1302765.25..1302765.26 rows=1 width=16) (actual time=102964.161..102964.162 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=945078 read=583094 dirtied=1049 written=2770
   ->  HashAggregate  (cost=1302765.23..1302765.24 rows=1 width=16) (actual time=102963.984..102963.985 rows=5 loops=1)
         Buffers: shared hit=945073 read=583094 dirtied=1049 written=2770
         ->  Hash Join  (cost=1030836.08..1301986.78 rows=155691 width=16) (actual time=89465.607..102604.731 rows=526749 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=945073 read=583094 dirtied=1049 written=2770
               ->  Bitmap Heap Scan on orders  (cost=12637.86..278178.48 rows=581841 width=20) (actual time=569.162..2918.154 rows=574420 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-07-01'::date) AND (o_orderdate < '1993-10-01'::date))
                     Buffers: shared hit=231295 read=1568 written=167
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12492.40 rows=581841 width=0) (actual time=466.554..466.554 rows=581612 loops=1)
                           Index Cond: ((o_orderdate >= '1993-07-01'::date) AND (o_orderdate < '1993-10-01'::date))
                           Buffers: shared hit=103 read=1561 written=167
               ->  Hash  (cost=1001240.22..1001240.22 rows=1356640 width=4) (actual time=88894.857..88894.857 rows=13767230 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484005kB
                     Buffers: shared hit=713778 read=581526 dirtied=1049 written=2603
                     ->  HashAggregate  (cost=987673.82..1001240.22 rows=1356640 width=4) (actual time=71776.414..81860.590 rows=13767230 loops=1)
                           Buffers: shared hit=713778 read=581526 dirtied=1049 written=2603
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..936986.41 rows=20274965 width=4) (actual time=0.250..32096.673 rows=37966096 loops=1)
                                 Buffers: shared hit=713778 read=581526 dirtied=1049 written=2603
 Total runtime: 103291.586 ms
(23 rows)

COMMIT;
COMMIT