BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-10-01'
	and o_orderdate < cast(date '1995-10-01' + 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=1164429.57..1164429.57 rows=1 width=16) (actual time=9747.046..9747.047 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2663724 read=389243 dirtied=355 written=536
   ->  HashAggregate  (cost=1164429.55..1164429.56 rows=1 width=16) (actual time=9747.001..9747.002 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2663719 read=389243 dirtied=355 written=536
         ->  Nested Loop Semi Join  (cost=12766.33..1163649.04 rows=156102 width=16) (actual time=271.394..9451.134 rows=525582 loops=1)
               Buffers: shared hit=2663719 read=389243 dirtied=355 written=536
               ->  Bitmap Heap Scan on orders  (cost=12765.76..278396.32 rows=587837 width=20) (actual time=271.321..2542.667 rows=573188 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-10-01'::date) AND (o_orderdate < '1996-01-01'::date))
                     Heap Blocks: exact=231449
                     Buffers: shared hit=130882 read=102230 dirtied=147 written=123
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12618.80 rows=587837 width=0) (actual time=198.512..198.512 rows=580826 loops=1)
                           Index Cond: ((o_orderdate >= '1995-10-01'::date) AND (o_orderdate < '1996-01-01'::date))
                           Buffers: shared hit=91 read=1572 written=10
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.55 rows=5 width=4) (actual time=0.011..0.011 rows=1 loops=573188)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2532837 read=287013 dirtied=208 written=413
 Planning time: 2.455 ms
 Execution time: 9748.942 ms
(21 rows)

COMMIT;
COMMIT