BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-08-01'
	and o_orderdate < cast(date '1996-08-01' + 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=1140779.66..1140779.66 rows=1 width=16) (actual time=9514.609..9514.610 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2759289 read=291509 written=8463
   ->  HashAggregate  (cost=1140779.64..1140779.65 rows=1 width=16) (actual time=9514.543..9514.544 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2759284 read=291509 written=8463
         ->  Nested Loop Semi Join  (cost=12084.55..1140006.92 rows=154544 width=16) (actual time=360.458..9252.400 rows=526008 loops=1)
               Buffers: shared hit=2759284 read=291509 written=8463
               ->  Bitmap Heap Scan on orders  (cost=12083.98..274151.66 rows=569712 width=20) (actual time=360.332..3347.010 rows=573347 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-08-01'::date) AND (o_orderdate < '1996-11-01'::date))
                     Heap Blocks: exact=228319
                     Buffers: shared hit=72922 read=156966 written=4419
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11941.55 rows=569712 width=0) (actual time=262.917..262.917 rows=573924 loops=1)
                           Index Cond: ((o_orderdate >= '1996-08-01'::date) AND (o_orderdate < '1996-11-01'::date))
                           Buffers: shared read=1569 written=60
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.57 rows=5 width=4) (actual time=0.009..0.009 rows=1 loops=573347)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2686362 read=134543 written=4044
 Planning time: 3.540 ms
 Execution time: 9516.181 ms
(21 rows)

COMMIT;
COMMIT