BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-10-01'
	and o_orderdate < cast(date '1997-10-01' + 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=1149223.28..1149223.29 rows=1 width=16) (actual time=10168.222..10168.223 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2765234 read=283661 dirtied=224 written=3984
   ->  HashAggregate  (cost=1149223.26..1149223.27 rows=1 width=16) (actual time=10168.147..10168.149 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2765229 read=283661 dirtied=224 written=3984
         ->  Nested Loop Semi Join  (cost=12555.10..1148463.04 rows=152045 width=16) (actual time=358.281..9899.919 rows=524949 loops=1)
               Buffers: shared hit=2765229 read=283661 dirtied=224 written=3984
               ->  Bitmap Heap Scan on orders  (cost=12554.53..277533.87 rows=578156 width=20) (actual time=358.110..1860.061 rows=572497 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-10-01'::date) AND (o_orderdate < '1998-01-01'::date))
                     Heap Blocks: exact=230765
                     Buffers: shared hit=229310 read=3111 dirtied=224 written=158
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12410.00 rows=578156 width=0) (actual time=258.469..258.469 rows=579331 loops=1)
                           Index Cond: ((o_orderdate >= '1997-10-01'::date) AND (o_orderdate < '1998-01-01'::date))
                           Buffers: shared hit=42 read=1614 written=158
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.57 rows=5 width=4) (actual time=0.013..0.013 rows=1 loops=572497)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2535919 read=280550 written=3826
 Planning time: 3.077 ms
 Execution time: 10169.739 ms
(21 rows)

COMMIT;
COMMIT