BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-08-01'
	and o_orderdate < cast(date '1997-08-01' + 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=1288900.13..1288900.13 rows=1 width=16) (actual time=112356.495..112356.496 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1218515 read=283641 dirtied=1062 written=7567
   ->  HashAggregate  (cost=1288900.11..1288900.12 rows=1 width=16) (actual time=112356.323..112356.325 rows=5 loops=1)
         Buffers: shared hit=1218510 read=283641 dirtied=1062 written=7567
         ->  Hash Join  (cost=1019634.94..1288113.25 rows=157372 width=16) (actual time=98459.974..111975.628 rows=525898 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1218510 read=283641 dirtied=1062 written=7567
               ->  Bitmap Heap Scan on orders  (cost=12423.95..275247.16 rows=586347 width=20) (actual time=612.388..3318.320 rows=573747 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-08-01'::date) AND (o_orderdate < '1997-11-01'::date))
                     Buffers: shared hit=225341 read=5020
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12277.37 rows=586347 width=0) (actual time=503.477..503.477 rows=575418 loops=1)
                           Index Cond: ((o_orderdate >= '1997-08-01'::date) AND (o_orderdate < '1997-11-01'::date))
                           Buffers: shared hit=2 read=1570
               ->  Hash  (cost=990386.13..990386.13 rows=1345988 width=4) (actual time=97845.403..97845.403 rows=13753462 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483521kB
                     Buffers: shared hit=993169 read=278621 dirtied=1062 written=7567
                     ->  HashAggregate  (cost=976926.25..990386.13 rows=1345988 width=4) (actual time=83345.107..94050.771 rows=13753462 loops=1)
                           Buffers: shared hit=993169 read=278621 dirtied=1062 written=7567
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..926788.28 rows=20055191 width=4) (actual time=0.481..40690.938 rows=37928885 loops=1)
                                 Buffers: shared hit=993169 read=278621 dirtied=1062 written=7567
 Total runtime: 112705.723 ms
(23 rows)

COMMIT;
COMMIT