BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-06-01'
	and o_orderdate < cast(date '1995-06-01' + 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=1291194.05..1291194.05 rows=1 width=16) (actual time=93835.370..93835.371 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=830848 read=683457 dirtied=305 written=752
   ->  HashAggregate  (cost=1291194.03..1291194.04 rows=1 width=16) (actual time=93835.200..93835.201 rows=5 loops=1)
         Buffers: shared hit=830843 read=683457 dirtied=305 written=752
         ->  Hash Join  (cost=1021666.50..1290415.57 rows=155691 width=16) (actual time=80037.663..93437.164 rows=527063 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=830843 read=683457 dirtied=305 written=752
               ->  Bitmap Heap Scan on orders  (cost=12224.85..275409.02 rows=576678 width=20) (actual time=618.608..3070.779 rows=574357 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-06-01'::date) AND (o_orderdate < '1995-09-01'::date))
                     Buffers: shared hit=202908 read=27826 written=562
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12080.68 rows=576678 width=0) (actual time=424.948..424.948 rows=576647 loops=1)
                           Index Cond: ((o_orderdate >= '1995-06-01'::date) AND (o_orderdate < '1995-09-01'::date))
                           Buffers: shared hit=70 read=1506
               ->  Hash  (cost=992483.65..992483.65 rows=1356640 width=4) (actual time=79416.519..79416.519 rows=13767198 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484004kB
                     Buffers: shared hit=627935 read=655631 dirtied=305 written=190
                     ->  HashAggregate  (cost=978917.25..992483.65 rows=1356640 width=4) (actual time=64695.877..74885.427 rows=13767198 loops=1)
                           Buffers: shared hit=627935 read=655631 dirtied=305 written=190
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..928679.27 rows=20095190 width=4) (actual time=0.171..30129.486 rows=37966982 loops=1)
                                 Buffers: shared hit=627935 read=655631 dirtied=305 written=190
 Total runtime: 94162.716 ms
(23 rows)

COMMIT;
COMMIT