BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-10-01'
	and o_orderdate < cast(date '1995-10-01' + 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=1162000.07..1162000.08 rows=1 width=16) (actual time=9467.928..9467.930 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2684425 read=366443 written=170
   ->  HashAggregate  (cost=1162000.05..1162000.06 rows=1 width=16) (actual time=9467.865..9467.867 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2684420 read=366443 written=170
         ->  Nested Loop Semi Join  (cost=12399.50..1161204.87 rows=159036 width=16) (actual time=309.371..9203.741 rows=525588 loops=1)
               Buffers: shared hit=2684420 read=366443 written=170
               ->  Bitmap Heap Scan on orders  (cost=12398.93..275705.37 rows=584829 width=20) (actual time=309.249..2424.270 rows=573197 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-10-01'::date) AND (o_orderdate < '1996-01-01'::date))
                     Heap Blocks: exact=229386
                     Buffers: shared hit=155484 read=75472 written=46
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12252.73 rows=584829 width=0) (actual time=228.715..228.715 rows=575549 loops=1)
                           Index Cond: ((o_orderdate >= '1995-10-01'::date) AND (o_orderdate < '1996-01-01'::date))
                           Buffers: shared read=1570 written=2
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.54 rows=5 width=4) (actual time=0.011..0.011 rows=1 loops=573197)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2528936 read=290971 written=124
 Planning time: 3.325 ms
 Execution time: 9470.304 ms
(21 rows)

COMMIT;
COMMIT