BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-01-01'
	and o_orderdate < cast(date '1996-01-01' + 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=1301120.93..1301120.94 rows=1 width=16) (actual time=105092.005..105092.007 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1170773 read=348510 written=11815
   ->  HashAggregate  (cost=1301120.91..1301120.92 rows=1 width=16) (actual time=105091.833..105091.835 rows=5 loops=1)
         Buffers: shared hit=1170768 read=348510 written=11815
         ->  Hash Join  (cost=1029656.83..1300358.20 rows=152542 width=16) (actual time=90726.220..104721.804 rows=519941 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1170768 read=348510 written=11815
               ->  Bitmap Heap Scan on orders  (cost=12469.67..277639.92 rows=574017 width=20) (actual time=698.599..3658.972 rows=567072 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-01-01'::date) AND (o_orderdate < '1996-04-01'::date))
                     Buffers: shared hit=230157 read=1924
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12326.16 rows=574017 width=0) (actual time=548.756..548.756 rows=574448 loops=1)
                           Index Cond: ((o_orderdate >= '1996-01-01'::date) AND (o_orderdate < '1996-04-01'::date))
                           Buffers: shared read=1646
               ->  Hash  (cost=1000362.31..1000362.31 rows=1345988 width=4) (actual time=90024.916..90024.916 rows=13753463 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483521kB
                     Buffers: shared hit=940611 read=346586 written=11815
                     ->  HashAggregate  (cost=986902.43..1000362.31 rows=1345988 width=4) (actual time=74424.640..84122.996 rows=13753463 loops=1)
                           Buffers: shared hit=940611 read=346586 written=11815
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..936252.57 rows=20259946 width=4) (actual time=1.155..37129.526 rows=37928434 loops=1)
                                 Buffers: shared hit=940611 read=346586 written=11815
 Total runtime: 105472.355 ms
(23 rows)

COMMIT;
COMMIT