BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-09-01'
	and o_orderdate < cast(date '1994-09-01' + 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=1149962.75..1149962.76 rows=1 width=16) (actual time=10303.778..10303.778 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2656289 read=366721 dirtied=143 written=3228
   ->  HashAggregate  (cost=1149962.73..1149962.74 rows=1 width=16) (actual time=10303.709..10303.710 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2656284 read=366721 dirtied=143 written=3228
         ->  Nested Loop Semi Join  (cost=12221.46..1149181.92 rows=156162 width=16) (actual time=1251.469..10028.784 rows=520371 loops=1)
               Buffers: shared hit=2656284 read=366721 dirtied=143 written=3228
               ->  Bitmap Heap Scan on orders  (cost=12220.89..274901.27 rows=576825 width=20) (actual time=1251.361..3178.554 rows=567764 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-09-01'::date) AND (o_orderdate < '1994-12-01'::date))
                     Heap Blocks: exact=228480
                     Buffers: shared hit=162278 read=67757 dirtied=143 written=293
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12076.68 rows=576825 width=0) (actual time=1168.360..1168.360 rows=569493 loops=1)
                           Index Cond: ((o_orderdate >= '1994-09-01'::date) AND (o_orderdate < '1994-12-01'::date))
                           Buffers: shared read=1555
               ->  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=567764)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2494006 read=298964 written=2935
 Planning time: 2.677 ms
 Execution time: 10306.505 ms
(21 rows)

COMMIT;
COMMIT