BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-09-01'
	and o_orderdate < cast(date '1997-09-01' + 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=1147774.66..1147774.66 rows=1 width=16) (actual time=9354.002..9354.003 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2705117 read=312425 dirtied=95 written=9553
   ->  HashAggregate  (cost=1147774.64..1147774.65 rows=1 width=16) (actual time=9353.943..9353.945 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2705112 read=312425 dirtied=95 written=9553
         ->  Nested Loop Semi Join  (cost=12421.07..1146999.85 rows=154958 width=16) (actual time=363.967..9089.927 rows=519160 loops=1)
               Buffers: shared hit=2705112 read=312425 dirtied=95 written=9553
               ->  Bitmap Heap Scan on orders  (cost=12420.50..276550.06 rows=572104 width=20) (actual time=363.821..2658.733 rows=566483 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-09-01'::date) AND (o_orderdate < '1997-12-01'::date))
                     Heap Blocks: exact=229306
                     Buffers: shared hit=138086 read=92855 dirtied=95 written=2871
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12277.48 rows=572104 width=0) (actual time=259.818..259.818 rows=571423 loops=1)
                           Index Cond: ((o_orderdate >= '1997-09-01'::date) AND (o_orderdate < '1997-12-01'::date))
                           Buffers: shared read=1635 written=4
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.58 rows=5 width=4) (actual time=0.011..0.011 rows=1 loops=566483)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2567026 read=219570 written=6682
 Planning time: 2.835 ms
 Execution time: 9355.461 ms
(21 rows)

COMMIT;
COMMIT