BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-04-01'
	and o_orderdate < cast(date '1996-04-01' + 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=1292590.60..1292590.60 rows=1 width=16) (actual time=144216.236..144216.237 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1259216 read=260146 dirtied=601 written=225
   ->  HashAggregate  (cost=1292590.58..1292590.59 rows=1 width=16) (actual time=144216.064..144216.066 rows=5 loops=1)
         Buffers: shared hit=1259211 read=260146 dirtied=601 written=225
         ->  Hash Join  (cost=1022955.27..1291818.30 rows=154455 width=16) (actual time=118994.749..143794.494 rows=520174 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1259211 read=260146 dirtied=601 written=225
               ->  Bitmap Heap Scan on orders  (cost=12178.64..275530.60 rows=570997 width=20) (actual time=710.013..13932.420 rows=567531 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-04-01'::date) AND (o_orderdate < '1996-07-01'::date))
                     Buffers: shared hit=198843 read=31098 written=56
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12035.89 rows=570997 width=0) (actual time=599.478..599.478 rows=570327 loops=1)
                           Index Cond: ((o_orderdate >= '1996-04-01'::date) AND (o_orderdate < '1996-07-01'::date))
                           Buffers: shared hit=133 read=1445 written=56
               ->  Hash  (cost=993769.05..993769.05 rows=1360607 width=4) (actual time=118282.982..118282.982 rows=13767164 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484002kB
                     Buffers: shared hit=1060368 read=229048 dirtied=601 written=169
                     ->  HashAggregate  (cost=980162.98..993769.05 rows=1360607 width=4) (actual time=103669.483..113573.123 rows=13767164 loops=1)
                           Buffers: shared hit=1060368 read=229048 dirtied=601 written=169
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..929875.79 rows=20114876 width=4) (actual time=0.119..64063.505 rows=37966560 loops=1)
                                 Buffers: shared hit=1060368 read=229048 dirtied=601 written=169
 Total runtime: 144500.260 ms
(23 rows)

COMMIT;
COMMIT