BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-10-01'
	and o_orderdate < cast(date '1997-10-01' + 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=1160947.93..1160947.93 rows=1 width=16) (actual time=10098.596..10098.597 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2678989 read=367156 written=4510
   ->  HashAggregate  (cost=1160947.91..1160947.92 rows=1 width=16) (actual time=10098.507..10098.509 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2678984 read=367156 written=4510
         ->  Nested Loop Semi Join  (cost=12390.11..1160150.19 rows=159544 width=16) (actual time=461.051..9816.054 rows=524896 loops=1)
               Buffers: shared hit=2678984 read=367156 written=4510
               ->  Bitmap Heap Scan on orders  (cost=12389.54..274929.09 rows=584303 width=20) (actual time=460.932..2197.100 rows=572406 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-10-01'::date) AND (o_orderdate < '1998-01-01'::date))
                     Heap Blocks: exact=228516
                     Buffers: shared hit=189784 read=40298 written=533
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12243.46 rows=584303 width=0) (actual time=346.250..346.250 rows=573568 loops=1)
                           Index Cond: ((o_orderdate >= '1997-10-01'::date) AND (o_orderdate < '1998-01-01'::date))
                           Buffers: shared read=1566 written=74
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.53 rows=5 width=4) (actual time=0.012..0.012 rows=1 loops=572406)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2489200 read=326858 written=3977
 Planning time: 3.915 ms
 Execution time: 10100.314 ms
(21 rows)

COMMIT;
COMMIT