BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-09-01'
	and o_orderdate < cast(date '1996-09-01' + 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=1133979.94..1133979.95 rows=1 width=16) (actual time=9074.040..9074.041 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2686257 read=328514 dirtied=115 written=20017
   ->  HashAggregate  (cost=1133979.92..1133979.93 rows=1 width=16) (actual time=9073.986..9073.986 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2686252 read=328514 dirtied=115 written=20017
         ->  Nested Loop Semi Join  (cost=11981.45..1133222.86 rows=151412 width=16) (actual time=269.448..8797.149 rows=518981 loops=1)
               Buffers: shared hit=2686252 read=328514 dirtied=115 written=20017
               ->  Bitmap Heap Scan on orders  (cost=11980.88..274991.64 rows=565117 width=20) (actual time=269.347..2600.788 rows=566077 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-09-01'::date) AND (o_orderdate < '1996-12-01'::date))
                     Heap Blocks: exact=228457
                     Buffers: shared hit=122836 read=107173 dirtied=115 written=6277
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11839.60 rows=565117 width=0) (actual time=193.420..193.420 rows=568991 loops=1)
                           Index Cond: ((o_orderdate >= '1996-09-01'::date) AND (o_orderdate < '1996-12-01'::date))
                           Buffers: shared read=1552 written=1
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.59 rows=5 width=4) (actual time=0.010..0.010 rows=1 loops=566077)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2563416 read=221341 written=13740
 Planning time: 2.977 ms
 Execution time: 9076.120 ms
(21 rows)

COMMIT;
COMMIT