BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-06-01'
	and o_orderdate < cast(date '1994-06-01' + 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=1303384.13..1303384.14 rows=1 width=16) (actual time=99705.668..99705.668 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=937482 read=590740 dirtied=1670 written=10819
   ->  HashAggregate  (cost=1303384.11..1303384.12 rows=1 width=16) (actual time=99705.510..99705.511 rows=5 loops=1)
         Buffers: shared hit=937477 read=590740 dirtied=1670 written=10819
         ->  Hash Join  (cost=1031117.30..1302588.27 rows=159169 width=16) (actual time=86975.970..99383.181 rows=526353 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=937477 read=590740 dirtied=1670 written=10819
               ->  Bitmap Heap Scan on orders  (cost=12919.08..278654.65 rows=594838 width=20) (actual time=427.052..2684.531 rows=574040 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-06-01'::date) AND (o_orderdate < '1994-09-01'::date))
                     Buffers: shared hit=217286 read=15627
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12770.37 rows=594838 width=0) (actual time=328.957..328.957 rows=582260 loops=1)
                           Index Cond: ((o_orderdate >= '1994-06-01'::date) AND (o_orderdate < '1994-09-01'::date))
                           Buffers: shared read=1667
               ->  Hash  (cost=1001240.22..1001240.22 rows=1356640 width=4) (actual time=86547.461..86547.461 rows=13753466 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483521kB
                     Buffers: shared hit=720191 read=575113 dirtied=1670 written=10819
                     ->  HashAggregate  (cost=987673.82..1001240.22 rows=1356640 width=4) (actual time=70889.026..81279.285 rows=13753466 loops=1)
                           Buffers: shared hit=720191 read=575113 dirtied=1670 written=10819
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..936986.41 rows=20274965 width=4) (actual time=0.226..33805.075 rows=37928218 loops=1)
                                 Buffers: shared hit=720191 read=575113 dirtied=1670 written=10819
 Total runtime: 100069.783 ms
(23 rows)

COMMIT;
COMMIT