BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-02-01'
	and o_orderdate < cast(date '1995-02-01' + 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=1123791.73..1123791.74 rows=1 width=16) (actual time=10431.546..10431.547 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2523560 read=437142 written=328
   ->  HashAggregate  (cost=1123791.71..1123791.72 rows=1 width=16) (actual time=10431.486..10431.486 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2523555 read=437142 written=328
         ->  Nested Loop Semi Join  (cost=11978.27..1123048.05 rows=148733 width=16) (actual time=295.316..10160.151 rows=509254 loops=1)
               Buffers: shared hit=2523555 read=437142 written=328
               ->  Bitmap Heap Scan on orders  (cost=11977.70..275362.02 rows=556221 width=20) (actual time=295.190..2662.135 rows=555210 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-02-01'::date) AND (o_orderdate < '1995-05-01'::date))
                     Heap Blocks: exact=227499
                     Buffers: shared hit=130114 read=98948 written=69
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11838.64 rows=556221 width=0) (actual time=216.414..216.414 rows=558556 loops=1)
                           Index Cond: ((o_orderdate >= '1995-02-01'::date) AND (o_orderdate < '1995-05-01'::date))
                           Buffers: shared read=1563
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.61 rows=5 width=4) (actual time=0.013..0.013 rows=1 loops=555210)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2393441 read=338194 written=259
 Planning time: 2.763 ms
 Execution time: 10433.883 ms
(21 rows)

COMMIT;
COMMIT