BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-04-01'
	and o_orderdate < cast(date '1994-04-01' + 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=1152618.40..1152618.41 rows=1 width=16) (actual time=10749.798..10749.798 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2642637 read=383321 dirtied=139 written=11630
   ->  HashAggregate  (cost=1152618.38..1152618.39 rows=1 width=16) (actual time=10749.695..10749.698 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2642632 read=383321 dirtied=139 written=11630
         ->  Nested Loop Semi Join  (cost=12503.08..1151837.71 rows=156135 width=16) (actual time=317.969..10461.492 rows=521054 loops=1)
               Buffers: shared hit=2642632 read=383321 dirtied=139 written=11630
               ->  Bitmap Heap Scan on orders  (cost=12502.52..276687.71 rows=575813 width=20) (actual time=317.841..2159.700 rows=568048 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-04-01'::date) AND (o_orderdate < '1994-07-01'::date))
                     Heap Blocks: exact=229520
                     Buffers: shared hit=190548 read=40608 dirtied=139 written=99
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12358.57 rows=575813 width=0) (actual time=237.673..237.673 rows=573228 loops=1)
                           Index Cond: ((o_orderdate >= '1994-04-01'::date) AND (o_orderdate < '1994-07-01'::date))
                           Buffers: shared read=1636 written=1
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.57 rows=5 width=4) (actual time=0.014..0.014 rows=1 loops=568048)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2452084 read=342713 written=11531
 Planning time: 4.232 ms
 Execution time: 10751.533 ms
(21 rows)

COMMIT;
COMMIT