BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-03-01'
	and o_orderdate < cast(date '1994-03-01' + 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=1288494.94..1288494.94 rows=1 width=16) (actual time=131150.135..131150.136 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1006822 read=495344 dirtied=123 written=4085
   ->  HashAggregate  (cost=1288494.92..1288494.93 rows=1 width=16) (actual time=131149.969..131149.970 rows=5 loops=1)
         Buffers: shared hit=1006817 read=495344 dirtied=123 written=4085
         ->  Hash Join  (cost=1019558.48..1287733.23 rows=152338 width=16) (actual time=110337.374..130693.375 rows=526180 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1006817 read=495344 dirtied=123 written=4085
               ->  Bitmap Heap Scan on orders  (cost=12168.18..274810.26 rows=574272 width=20) (actual time=720.207..9754.277 rows=573651 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-03-01'::date) AND (o_orderdate < '1994-06-01'::date))
                     Buffers: shared hit=131615 read=98756 dirtied=123 written=65
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12024.62 rows=574272 width=0) (actual time=572.547..572.547 rows=574823 loops=1)
                           Index Cond: ((o_orderdate >= '1994-03-01'::date) AND (o_orderdate < '1994-06-01'::date))
                           Buffers: shared hit=2 read=1568
               ->  Hash  (cost=990761.09..990761.09 rows=1330336 width=4) (actual time=109615.559..109615.559 rows=13767168 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484002kB
                     Buffers: shared hit=875202 read=396588 written=4020
                     ->  HashAggregate  (cost=977457.73..990761.09 rows=1330336 width=4) (actual time=92920.879..102763.977 rows=13767168 loops=1)
                           Buffers: shared hit=875202 read=396588 written=4020
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..927319.82 rows=20055165 width=4) (actual time=0.290..54281.045 rows=37966418 loops=1)
                                 Buffers: shared hit=875202 read=396588 written=4020
 Total runtime: 131423.621 ms
(23 rows)

COMMIT;
COMMIT