BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-10-01'
	and o_orderdate < cast(date '1994-10-01' + 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=1173829.29..1173829.29 rows=1 width=16) (actual time=11140.844..11140.845 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2564217 read=496480 written=675
   ->  HashAggregate  (cost=1173829.27..1173829.28 rows=1 width=16) (actual time=11140.773..11140.774 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2564212 read=496480 written=675
         ->  Nested Loop Semi Join  (cost=12870.64..1173029.95 rows=159863 width=16) (actual time=375.228..10858.231 rows=526987 loops=1)
               Buffers: shared hit=2564212 read=496480 written=675
               ->  Bitmap Heap Scan on orders  (cost=12870.07..278318.32 rows=592550 width=20) (actual time=375.134..3012.177 rows=574808 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-10-01'::date) AND (o_orderdate < '1995-01-01'::date))
                     Heap Blocks: exact=231304
                     Buffers: shared hit=102725 read=130243 written=273
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12721.93 rows=592550 width=0) (actual time=273.539..273.539 rows=581825 loops=1)
                           Index Cond: ((o_orderdate >= '1994-10-01'::date) AND (o_orderdate < '1995-01-01'::date))
                           Buffers: shared hit=73 read=1591 written=6
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.54 rows=5 width=4) (actual time=0.013..0.013 rows=1 loops=574808)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2461487 read=366237 written=402
 Planning time: 3.115 ms
 Execution time: 11142.446 ms
(21 rows)

COMMIT;
COMMIT