BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-06-01'
	and o_orderdate < cast(date '1994-06-01' + 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=1149306.28..1149306.28 rows=1 width=16) (actual time=9092.336..9092.337 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2728443 read=330898 written=98
   ->  HashAggregate  (cost=1149306.26..1149306.27 rows=1 width=16) (actual time=9092.262..9092.265 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2728438 read=330898 written=98
         ->  Nested Loop Semi Join  (cost=12359.12..1148527.54 rows=155744 width=16) (actual time=310.736..8823.622 rows=527066 loops=1)
               Buffers: shared hit=2728438 read=330898 written=98
               ->  Bitmap Heap Scan on orders  (cost=12358.55..276007.53 rows=573865 width=20) (actual time=310.642..2195.272 rows=574833 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-06-01'::date) AND (o_orderdate < '1994-09-01'::date))
                     Heap Blocks: exact=229665
                     Buffers: shared hit=181517 read=49785 written=13
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12215.09 rows=573865 width=0) (actual time=229.273..229.273 rows=578357 loops=1)
                           Index Cond: ((o_orderdate >= '1994-06-01'::date) AND (o_orderdate < '1994-09-01'::date))
                           Buffers: shared read=1637 written=1
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.57 rows=5 width=4) (actual time=0.011..0.011 rows=1 loops=574833)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2546921 read=281113 written=85
 Planning time: 3.152 ms
 Execution time: 9095.624 ms
(21 rows)

COMMIT;
COMMIT