BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-05-01'
	and o_orderdate < cast(date '1993-05-01' + 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=1300211.70..1300211.71 rows=1 width=16) (actual time=150482.502..150482.503 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1089374 read=449438 dirtied=890 written=518
   ->  HashAggregate  (cost=1300211.68..1300211.69 rows=1 width=16) (actual time=150482.336..150482.338 rows=5 loops=1)
         Buffers: shared hit=1089369 read=449438 dirtied=890 written=518
         ->  Hash Join  (cost=1029040.96..1299442.80 rows=153777 width=16) (actual time=129108.157..150054.068 rows=526870 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1089369 read=449438 dirtied=890 written=518
               ->  Bitmap Heap Scan on orders  (cost=12419.80..277305.06 rows=571884 width=20) (actual time=692.759..8805.042 rows=574164 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-05-01'::date) AND (o_orderdate < '1993-08-01'::date))
                     Buffers: shared hit=223302 read=9023 dirtied=1 written=499
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12276.83 rows=571884 width=0) (actual time=589.897..589.897 rows=580465 loops=1)
                           Index Cond: ((o_orderdate >= '1993-05-01'::date) AND (o_orderdate < '1993-08-01'::date))
                           Buffers: shared read=1660
               ->  Hash  (cost=999613.57..999613.57 rows=1360607 width=4) (actual time=128413.622..128413.622 rows=13767238 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484005kB
                     Buffers: shared hit=866067 read=440415 dirtied=889 written=19
                     ->  HashAggregate  (cost=986007.50..999613.57 rows=1360607 width=4) (actual time=113188.128..123076.298 rows=13767238 loops=1)
                           Buffers: shared hit=866067 read=440415 dirtied=889 written=19
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..935420.50 rows=20234800 width=4) (actual time=0.134..73932.147 rows=37966174 loops=1)
                                 Buffers: shared hit=866067 read=440415 dirtied=889 written=19
 Total runtime: 150791.732 ms
(23 rows)

COMMIT;
COMMIT