BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-04-01'
	and o_orderdate < cast(date '1997-04-01' + 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=1287878.23..1287878.23 rows=1 width=16) (actual time=118904.017..118904.018 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=743658 read=757712 dirtied=584 written=4515
   ->  HashAggregate  (cost=1287878.21..1287878.22 rows=1 width=16) (actual time=118903.860..118903.862 rows=5 loops=1)
         Buffers: shared hit=743653 read=757712 dirtied=584 written=4515
         ->  Hash Join  (cost=1019176.63..1287120.46 rows=151551 width=16) (actual time=101765.701..118474.208 rows=520909 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=743653 read=757712 dirtied=584 written=4515
               ->  Bitmap Heap Scan on orders  (cost=11965.65..274463.53 rows=564659 width=20) (actual time=565.072..5434.093 rows=568328 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-04-01'::date) AND (o_orderdate < '1997-07-01'::date))
                     Buffers: shared hit=225427 read=4148 written=874
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11824.49 rows=564659 width=0) (actual time=460.925..460.925 rows=569468 loops=1)
                           Index Cond: ((o_orderdate >= '1997-04-01'::date) AND (o_orderdate < '1997-07-01'::date))
                           Buffers: shared hit=94 read=1461 written=633
               ->  Hash  (cost=990386.13..990386.13 rows=1345988 width=4) (actual time=101198.980..101198.980 rows=13767168 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484002kB
                     Buffers: shared hit=518226 read=753564 dirtied=584 written=3641
                     ->  HashAggregate  (cost=976926.25..990386.13 rows=1345988 width=4) (actual time=83612.336..94375.073 rows=13767168 loops=1)
                           Buffers: shared hit=518226 read=753564 dirtied=584 written=3641
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..926788.28 rows=20055191 width=4) (actual time=0.210..40230.173 rows=37966418 loops=1)
                                 Buffers: shared hit=518226 read=753564 dirtied=584 written=3641
 Total runtime: 119371.263 ms
(23 rows)

COMMIT;
COMMIT