BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-11-01'
	and o_orderdate < cast(date '1995-11-01' + 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=1154549.74..1154549.75 rows=1 width=16) (actual time=10804.503..10804.505 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2667534 read=383975 dirtied=124 written=172
   ->  HashAggregate  (cost=1154549.72..1154549.73 rows=1 width=16) (actual time=10804.420..10804.420 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2667529 read=383975 dirtied=124 written=172
         ->  Nested Loop Semi Join  (cost=12530.77..1153769.05 rows=156135 width=16) (actual time=337.240..10502.119 rows=525539 loops=1)
               Buffers: shared hit=2667529 read=383975 dirtied=124 written=172
               ->  Bitmap Heap Scan on orders  (cost=12530.20..277238.50 rows=576953 width=20) (actual time=337.111..2493.590 rows=573029 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-11-01'::date) AND (o_orderdate < '1996-02-01'::date))
                     Heap Blocks: exact=230633
                     Buffers: shared hit=166903 read=65386 dirtied=124 written=20
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12385.96 rows=576953 width=0) (actual time=245.237..245.237 rows=578867 loops=1)
                           Index Cond: ((o_orderdate >= '1995-11-01'::date) AND (o_orderdate < '1996-02-01'::date))
                           Buffers: shared read=1656 written=2
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.57 rows=5 width=4) (actual time=0.013..0.013 rows=1 loops=573029)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2500626 read=318589 written=152
 Planning time: 3.144 ms
 Execution time: 10806.377 ms
(21 rows)

COMMIT;
COMMIT