BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-05-01'
	and o_orderdate < cast(date '1995-05-01' + 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=1296083.20..1296083.20 rows=1 width=16) (actual time=82041.482..82041.482 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=816726 read=697549 dirtied=674 written=13
   ->  HashAggregate  (cost=1296083.18..1296083.19 rows=1 width=16) (actual time=82041.321..82041.321 rows=5 loops=1)
         Buffers: shared hit=816721 read=697549 dirtied=674 written=13
         ->  Hash Join  (cost=1025754.30..1295300.47 rows=156541 width=16) (actual time=70620.553..81701.371 rows=526687 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=816721 read=697549 dirtied=674 written=13
               ->  Bitmap Heap Scan on orders  (cost=12527.29..276493.47 rows=578079 width=20) (actual time=477.667..2462.478 rows=574256 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-05-01'::date) AND (o_orderdate < '1995-08-01'::date))
                     Buffers: shared hit=229777 read=1657
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12382.77 rows=578079 width=0) (actual time=306.832..306.832 rows=578359 loops=1)
                           Index Cond: ((o_orderdate >= '1995-05-01'::date) AND (o_orderdate < '1995-08-01'::date))
                           Buffers: shared read=1657
               ->  Hash  (cost=996166.91..996166.91 rows=1364808 width=4) (actual time=70140.361..70140.361 rows=13767175 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484003kB
                     Buffers: shared hit=586944 read=695892 dirtied=674 written=13
                     ->  HashAggregate  (cost=982518.83..996166.91 rows=1364808 width=4) (actual time=56971.402..66126.015 rows=13767175 loops=1)
                           Buffers: shared hit=586944 read=695892 dirtied=674 written=13
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..932132.04 rows=20154718 width=4) (actual time=0.216..26655.741 rows=37965693 loops=1)
                                 Buffers: shared hit=586944 read=695892 dirtied=674 written=13
 Total runtime: 82274.521 ms
(23 rows)

COMMIT;
COMMIT