BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-09-01'
	and o_orderdate < cast(date '1995-09-01' + 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=1294574.68..1294574.68 rows=1 width=16) (actual time=101427.271..101427.272 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=884564 read=628993 dirtied=1070 written=13364
   ->  HashAggregate  (cost=1294574.66..1294574.67 rows=1 width=16) (actual time=101427.111..101427.113 rows=5 loops=1)
         Buffers: shared hit=884559 read=628993 dirtied=1070 written=13364
         ->  Hash Join  (cost=1024442.78..1293811.95 rows=152542 width=16) (actual time=89495.843..101124.947 rows=519393 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=884559 read=628993 dirtied=1070 written=13364
               ->  Bitmap Heap Scan on orders  (cost=12376.64..276239.45 rows=571187 width=20) (actual time=445.463..2575.730 rows=566793 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-09-01'::date) AND (o_orderdate < '1995-12-01'::date))
                     Buffers: shared hit=229086 read=1630
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12233.85 rows=571187 width=0) (actual time=340.763..340.763 rows=571385 loops=1)
                           Index Cond: ((o_orderdate >= '1995-09-01'::date) AND (o_orderdate < '1995-12-01'::date))
                           Buffers: shared read=1630
               ->  Hash  (cost=995241.29..995241.29 rows=1345988 width=4) (actual time=89048.623..89048.623 rows=13753394 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483518kB
                     Buffers: shared hit=655473 read=627363 dirtied=1070 written=13364
                     ->  HashAggregate  (cost=981781.41..995241.29 rows=1345988 width=4) (actual time=76298.581..85329.201 rows=13753394 loops=1)
                           Buffers: shared hit=655473 read=627363 dirtied=1070 written=13364
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..931394.29 rows=20154847 width=4) (actual time=0.259..39864.089 rows=37927599 loops=1)
                                 Buffers: shared hit=655473 read=627363 dirtied=1070 written=13364
 Total runtime: 101697.833 ms
(23 rows)

COMMIT;
COMMIT