BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-08-01'
	and o_orderdate < cast(date '1994-08-01' + 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=1145278.57..1145278.58 rows=1 width=16) (actual time=10635.692..10635.692 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2703799 read=351302 written=588
   ->  HashAggregate  (cost=1145278.55..1145278.56 rows=1 width=16) (actual time=10635.598..10635.601 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2703794 read=351302 written=588
         ->  Nested Loop Semi Join  (cost=12365.29..1144508.11 rows=154089 width=16) (actual time=396.763..10347.533 rows=525987 loops=1)
               Buffers: shared hit=2703794 read=351302 written=588
               ->  Bitmap Heap Scan on orders  (cost=12364.72..276959.63 rows=569394 width=20) (actual time=396.628..2498.923 rows=573799 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-08-01'::date) AND (o_orderdate < '1994-11-01'::date))
                     Heap Blocks: exact=230651
                     Buffers: shared hit=177935 read=54376 written=92
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12222.38 rows=569394 width=0) (actual time=290.961..290.961 rows=579508 loops=1)
                           Index Cond: ((o_orderdate >= '1994-08-01'::date) AND (o_orderdate < '1994-11-01'::date))
                           Buffers: shared read=1660 written=1
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.59 rows=5 width=4) (actual time=0.013..0.013 rows=1 loops=573799)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2525859 read=296926 written=496
 Planning time: 4.553 ms
 Execution time: 10637.982 ms
(21 rows)

COMMIT;
COMMIT