BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-09-01'
	and o_orderdate < cast(date '1993-09-01' + 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=1151618.10..1151618.10 rows=1 width=16) (actual time=9009.667..9009.668 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2758045 read=267895 dirtied=353 written=584
   ->  HashAggregate  (cost=1151618.08..1151618.09 rows=1 width=16) (actual time=9009.602..9009.603 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2758040 read=267895 dirtied=353 written=584
         ->  Nested Loop Semi Join  (cost=12508.69..1150845.36 rows=154544 width=16) (actual time=324.032..8743.091 rows=520544 loops=1)
               Buffers: shared hit=2758040 read=267895 dirtied=353 written=584
               ->  Bitmap Heap Scan on orders  (cost=12508.13..277454.68 rows=575970 width=20) (actual time=323.946..2155.959 rows=568003 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-09-01'::date) AND (o_orderdate < '1993-12-01'::date))
                     Heap Blocks: exact=230146
                     Buffers: shared hit=186529 read=45260 dirtied=211 written=96
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12364.14 rows=575970 width=0) (actual time=239.528..239.528 rows=574112 loops=1)
                           Index Cond: ((o_orderdate >= '1993-09-01'::date) AND (o_orderdate < '1993-12-01'::date))
                           Buffers: shared read=1643 written=5
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.57 rows=5 width=4) (actual time=0.011..0.011 rows=1 loops=568003)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2571511 read=222635 dirtied=142 written=488
 Planning time: 3.196 ms
 Execution time: 9012.826 ms
(21 rows)

COMMIT;
COMMIT