BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-07-01'
	and o_orderdate < cast(date '1997-07-01' + 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=1295644.98..1295644.99 rows=1 width=16) (actual time=146518.163..146518.164 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=922004 read=606391 dirtied=886 written=6783
   ->  HashAggregate  (cost=1295644.96..1295644.97 rows=1 width=16) (actual time=146517.981..146517.983 rows=5 loops=1)
         Buffers: shared hit=921999 read=606391 dirtied=886 written=6783
         ->  Hash Join  (cost=1025278.91..1294862.53 rows=156487 width=16) (actual time=129024.340..146095.622 rows=526401 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=921999 read=606391 dirtied=886 written=6783
               ->  Bitmap Heap Scan on orders  (cost=12563.52..276553.47 rows=579663 width=20) (actual time=757.925..7507.060 rows=574491 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-07-01'::date) AND (o_orderdate < '1997-10-01'::date))
                     Buffers: shared hit=229914 read=1804
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12418.61 rows=579663 width=0) (actual time=630.758..630.758 rows=578522 loops=1)
                           Index Cond: ((o_orderdate >= '1997-07-01'::date) AND (o_orderdate < '1997-10-01'::date))
                           Buffers: shared read=1650
               ->  Hash  (cost=995707.80..995707.80 rows=1360607 width=4) (actual time=128264.447..128264.447 rows=13767175 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484003kB
                     Buffers: shared hit=692085 read=604587 dirtied=886 written=6783
                     ->  HashAggregate  (cost=982101.73..995707.80 rows=1360607 width=4) (actual time=115476.483..124646.257 rows=13767175 loops=1)
                           Buffers: shared hit=692085 read=604587 dirtied=886 written=6783
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..931715.07 rows=20154663 width=4) (actual time=0.227..77303.433 rows=37965693 loops=1)
                                 Buffers: shared hit=692085 read=604587 dirtied=886 written=6783
 Total runtime: 146752.175 ms
(23 rows)

COMMIT;
COMMIT