BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-03-01'
	and o_orderdate < cast(date '1995-03-01' + 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=1302120.56..1302120.57 rows=1 width=16) (actual time=90316.604..90316.605 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=969470 read=552884 written=10535
   ->  HashAggregate  (cost=1302120.54..1302120.55 rows=1 width=16) (actual time=90316.462..90316.465 rows=5 loops=1)
         Buffers: shared hit=969465 read=552884 written=10535
         ->  Hash Join  (cost=1030262.25..1301337.46 rows=156616 width=16) (actual time=76032.939..89912.805 rows=525870 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=969465 read=552884 written=10535
               ->  Bitmap Heap Scan on orders  (cost=12797.15..278194.94 rows=589186 width=20) (actual time=297.202..4226.192 rows=573749 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-03-01'::date) AND (o_orderdate < '1995-06-01'::date))
                     Buffers: shared hit=91294 read=141637 written=76
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12649.85 rows=589186 width=0) (actual time=221.941..221.941 rows=581258 loops=1)
                           Index Cond: ((o_orderdate >= '1995-03-01'::date) AND (o_orderdate < '1995-06-01'::date))
                           Buffers: shared hit=2 read=1662
               ->  Hash  (cost=1000635.57..1000635.57 rows=1346362 width=4) (actual time=75734.061..75734.061 rows=13753463 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483521kB
                     Buffers: shared hit=878171 read=411247 written=10459
                     ->  HashAggregate  (cost=987171.95..1000635.57 rows=1346362 width=4) (actual time=63135.989..72613.370 rows=13753463 loops=1)
                           Buffers: shared hit=878171 read=411247 written=10459
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..936533.65 rows=20255322 width=4) (actual time=0.136..30449.731 rows=37928434 loops=1)
                                 Buffers: shared hit=878171 read=411247 written=10459
 Total runtime: 90518.680 ms
(23 rows)

COMMIT;
COMMIT