BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-11-01'
	and o_orderdate < cast(date '1996-11-01' + 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=1302925.61..1302925.61 rows=1 width=16) (actual time=94280.624..94280.625 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=963637 read=564804 dirtied=647 written=816
   ->  HashAggregate  (cost=1302925.59..1302925.60 rows=1 width=16) (actual time=94280.447..94280.448 rows=5 loops=1)
         Buffers: shared hit=963632 read=564804 dirtied=647 written=816
         ->  Hash Join  (cost=1031039.58..1302154.73 rows=154171 width=16) (actual time=80130.906..93903.036 rows=526924 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=963632 read=564804 dirtied=647 written=816
               ->  Bitmap Heap Scan on orders  (cost=12608.71..278130.08 rows=580558 width=20) (actual time=525.474..3592.833 rows=574809 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-11-01'::date) AND (o_orderdate < '1997-02-01'::date))
                     Buffers: shared hit=226732 read=6400 written=765
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12463.57 rows=580558 width=0) (actual time=399.568..399.568 rows=582194 loops=1)
                           Index Cond: ((o_orderdate >= '1996-11-01'::date) AND (o_orderdate < '1997-02-01'::date))
                           Buffers: shared read=1668
               ->  Hash  (cost=1001601.34..1001601.34 rows=1346362 width=4) (actual time=79603.807..79603.807 rows=13767230 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484005kB
                     Buffers: shared hit=736900 read=558404 dirtied=647 written=51
                     ->  HashAggregate  (cost=988137.72..1001601.34 rows=1346362 width=4) (actual time=63577.771..73042.243 rows=13767230 loops=1)
                           Buffers: shared hit=736900 read=558404 dirtied=647 written=51
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..937449.82 rows=20275160 width=4) (actual time=0.143..30370.571 rows=37966096 loops=1)
                                 Buffers: shared hit=736900 read=558404 dirtied=647 written=51
 Total runtime: 94572.223 ms
(23 rows)

COMMIT;
COMMIT