BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-06-01'
	and o_orderdate < cast(date '1997-06-01' + 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=1154652.99..1154653.00 rows=1 width=16) (actual time=9939.493..9939.493 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2775991 read=279521 written=7240
   ->  HashAggregate  (cost=1154652.97..1154652.98 rows=1 width=16) (actual time=9939.401..9939.403 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2775986 read=279521 written=7240
         ->  Nested Loop Semi Join  (cost=12291.64..1153861.18 rows=158358 width=16) (actual time=394.542..9672.356 rows=526509 loops=1)
               Buffers: shared hit=2775986 read=279521 written=7240
               ->  Bitmap Heap Scan on orders  (cost=12291.08..274503.78 rows=579380 width=20) (actual time=394.384..3201.799 rows=574360 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-06-01'::date) AND (o_orderdate < '1997-09-01'::date))
                     Heap Blocks: exact=228412
                     Buffers: shared hit=106530 read=123454 written=3001
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12146.23 rows=579380 width=0) (actual time=288.728..288.728 rows=574943 loops=1)
                           Index Cond: ((o_orderdate >= '1997-06-01'::date) AND (o_orderdate < '1997-09-01'::date))
                           Buffers: shared read=1572 written=28
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.54 rows=5 width=4) (actual time=0.010..0.010 rows=1 loops=574360)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2669456 read=156067 written=4239
 Planning time: 9.727 ms
 Execution time: 9940.803 ms
(21 rows)

COMMIT;
COMMIT