BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-01-01'
	and o_orderdate < cast(date '1995-01-01' + 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=1296572.46..1296572.46 rows=1 width=16) (actual time=144690.307..144690.307 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1141791 read=377453 written=2305
   ->  HashAggregate  (cost=1296572.44..1296572.45 rows=1 width=16) (actual time=144690.145..144690.146 rows=5 loops=1)
         Buffers: shared hit=1141786 read=377453 written=2305
         ->  Hash Join  (cost=1026125.64..1295799.65 rows=154558 width=16) (actual time=122594.566..144245.117 rows=515516 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1141786 read=377453 written=2305
               ->  Bitmap Heap Scan on orders  (cost=12444.13..276588.43 rows=573087 width=20) (actual time=641.463..11828.352 rows=562080 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-01-01'::date) AND (o_orderdate < '1995-04-01'::date))
                     Buffers: shared hit=207145 read=23406 written=595
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12300.85 rows=573087 width=0) (actual time=534.213..534.213 rows=566607 loops=1)
                           Index Cond: ((o_orderdate >= '1995-01-01'::date) AND (o_orderdate < '1995-04-01'::date))
                           Buffers: shared read=1619
               ->  Hash  (cost=996673.93..996673.93 rows=1360607 width=4) (actual time=121951.119..121951.119 rows=13767115 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484001kB
                     Buffers: shared hit=934641 read=354047 written=1710
                     ->  HashAggregate  (cost=983067.86..996673.93 rows=1360607 width=4) (actual time=108680.605..117673.056 rows=13767115 loops=1)
                           Buffers: shared hit=934641 read=354047 written=1710
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..932631.56 rows=20174519 width=4) (actual time=0.935..70456.142 rows=37965325 loops=1)
                                 Buffers: shared hit=934641 read=354047 written=1710
 Total runtime: 144914.017 ms
(23 rows)

COMMIT;
COMMIT