BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-07-01'
	and o_orderdate < cast(date '1994-07-01' + 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=1290773.93..1290773.93 rows=1 width=16) (actual time=141918.255..141918.256 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=731333 read=783276 dirtied=929 written=9531
   ->  HashAggregate  (cost=1290773.91..1290773.92 rows=1 width=16) (actual time=141918.090..141918.093 rows=5 loops=1)
         Buffers: shared hit=731328 read=783276 dirtied=929 written=9531
         ->  Hash Join  (cost=1021434.17..1290018.84 rows=151014 width=16) (actual time=118353.738..141441.608 rows=526187 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=731328 read=783276 dirtied=929 written=9531
               ->  Bitmap Heap Scan on orders  (cost=12092.62..275182.80 rows=570412 width=20) (actual time=707.868..13193.803 rows=573838 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-07-01'::date) AND (o_orderdate < '1994-10-01'::date))
                     Buffers: shared hit=84052 read=146986
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11950.02 rows=570412 width=0) (actual time=596.038..596.038 rows=576180 loops=1)
                           Index Cond: ((o_orderdate >= '1994-07-01'::date) AND (o_orderdate < '1994-10-01'::date))
                           Buffers: shared read=1578
               ->  Hash  (cost=992712.35..992712.35 rows=1330336 width=4) (actual time=117643.857..117643.857 rows=13767198 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484004kB
                     Buffers: shared hit=647276 read=636290 dirtied=929 written=9531
                     ->  HashAggregate  (cost=979408.99..992712.35 rows=1330336 width=4) (actual time=104062.043..113601.482 rows=13767198 loops=1)
                           Buffers: shared hit=647276 read=636290 dirtied=929 written=9531
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..929171.05 rows=20095177 width=4) (actual time=3.207..65891.668 rows=37966982 loops=1)
                                 Buffers: shared hit=647276 read=636290 dirtied=929 written=9531
 Total runtime: 142149.213 ms
(23 rows)

COMMIT;
COMMIT