BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-10-01'
	and o_orderdate < cast(date '1995-10-01' + 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=1293658.82..1293658.82 rows=1 width=16) (actual time=94071.671..94071.672 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=521228 read=996352 dirtied=594 written=10740
   ->  HashAggregate  (cost=1293658.80..1293658.81 rows=1 width=16) (actual time=94071.504..94071.507 rows=5 loops=1)
         Buffers: shared hit=521223 read=996352 dirtied=594 written=10740
         ->  Hash Join  (cost=1023717.93..1292886.61 rows=154438 width=16) (actual time=80446.158..93740.743 rows=525069 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=521223 read=996352 dirtied=594 written=10740
               ->  Bitmap Heap Scan on orders  (cost=12344.99..275983.60 rows=573174 width=20) (actual time=455.752..2585.187 rows=572593 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-10-01'::date) AND (o_orderdate < '1996-01-01'::date))
                     Buffers: shared hit=228359 read=3092
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12201.69 rows=573174 width=0) (actual time=338.499..338.499 rows=576665 loops=1)
                           Index Cond: ((o_orderdate >= '1995-10-01'::date) AND (o_orderdate < '1996-01-01'::date))
                           Buffers: shared read=1616
               ->  Hash  (cost=994414.93..994414.93 rows=1356641 width=4) (actual time=79988.077..79988.077 rows=13753444 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483520kB
                     Buffers: shared hit=292864 read=993260 dirtied=594 written=10740
                     ->  HashAggregate  (cost=980848.52..994414.93 rows=1356641 width=4) (actual time=64806.648..74149.476 rows=13753444 loops=1)
                           Buffers: shared hit=292864 read=993260 dirtied=594 written=10740
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..930511.27 rows=20134903 width=4) (actual time=0.200..31416.845 rows=37927958 loops=1)
                                 Buffers: shared hit=292864 read=993260 dirtied=594 written=10740
 Total runtime: 94381.220 ms
(23 rows)

COMMIT;
COMMIT