BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-02-01'
	and o_orderdate < cast(date '1997-02-01' + 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=1300762.73..1300762.73 rows=1 width=16) (actual time=89073.785..89073.785 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=764478 read=769486 dirtied=2685 written=32836
   ->  HashAggregate  (cost=1300762.71..1300762.72 rows=1 width=16) (actual time=89073.607..89073.608 rows=5 loops=1)
         Buffers: shared hit=764473 read=769486 dirtied=2685 written=32836
         ->  Hash Join  (cost=1029528.86..1300003.88 rows=151766 width=16) (actual time=78867.509..88857.166 rows=509537 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=764473 read=769486 dirtied=2685 written=32836
               ->  Bitmap Heap Scan on orders  (cost=12265.09..277294.02 rows=564595 width=20) (actual time=500.796..2042.457 rows=555667 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-02-01'::date) AND (o_orderdate < '1997-05-01'::date))
                     Buffers: shared hit=228906 read=1812
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12123.94 rows=564595 width=0) (actual time=371.423..371.423 rows=562223 loops=1)
                           Index Cond: ((o_orderdate >= '1997-02-01'::date) AND (o_orderdate < '1997-05-01'::date))
                           Buffers: shared hit=97 read=1511
               ->  Hash  (cost=1000245.19..1000245.19 rows=1361486 width=4) (actual time=78365.258..78365.258 rows=13767194 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484003kB
                     Buffers: shared hit=535567 read=767674 dirtied=2685 written=32836
                     ->  HashAggregate  (cost=986630.33..1000245.19 rows=1361486 width=4) (actual time=63825.598..74203.986 rows=13767194 loops=1)
                           Buffers: shared hit=535567 read=767674 dirtied=2685 written=32836
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..935992.73 rows=20255041 width=4) (actual time=0.120..27936.628 rows=37966199 loops=1)
                                 Buffers: shared hit=535567 read=767674 dirtied=2685 written=32836
 Total runtime: 89398.154 ms
(23 rows)

COMMIT;
COMMIT