BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-07-01'
	and o_orderdate < cast(date '1995-07-01' + 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=1157535.88..1157535.89 rows=1 width=16) (actual time=10064.861..10064.862 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2704503 read=354267 dirtied=566 written=95
   ->  HashAggregate  (cost=1157535.86..1157535.87 rows=1 width=16) (actual time=10064.773..10064.774 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2704498 read=354267 dirtied=566 written=95
         ->  Nested Loop Semi Join  (cost=12626.68..1156761.09 rows=154955 width=16) (actual time=372.008..9796.116 rows=526906 loops=1)
               Buffers: shared hit=2704498 read=354267 dirtied=566 written=95
               ->  Bitmap Heap Scan on orders  (cost=12626.11..276461.76 rows=586310 width=20) (actual time=371.900..2675.734 rows=574713 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-07-01'::date) AND (o_orderdate < '1995-10-01'::date))
                     Heap Blocks: exact=229799
                     Buffers: shared hit=142190 read=89238 dirtied=391 written=26
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12479.53 rows=586310 width=0) (actual time=277.651..277.651 rows=578113 loops=1)
                           Index Cond: ((o_orderdate >= '1995-07-01'::date) AND (o_orderdate < '1995-10-01'::date))
                           Buffers: shared read=1629
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.54 rows=5 width=4) (actual time=0.012..0.012 rows=1 loops=574713)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2562308 read=265029 dirtied=175 written=69
 Planning time: 2.796 ms
 Execution time: 10067.439 ms
(21 rows)

COMMIT;
COMMIT