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=1295291.18..1295291.19 rows=1 width=16) (actual time=97840.852..97840.853 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=925377 read=593496 dirtied=1359 written=4511
   ->  HashAggregate  (cost=1295291.16..1295291.17 rows=1 width=16) (actual time=97840.666..97840.669 rows=5 loops=1)
         Buffers: shared hit=925372 read=593496 dirtied=1359 written=4511
         ->  Hash Join  (cost=1024768.85..1294508.38 rows=156556 width=16) (actual time=82530.523..97428.921 rows=526687 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=925372 read=593496 dirtied=1359 written=4511
               ->  Bitmap Heap Scan on orders  (cost=12702.71..276790.98 rows=586218 width=20) (actual time=628.457..4546.964 rows=574256 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-05-01'::date) AND (o_orderdate < '1995-08-01'::date))
                     Buffers: shared hit=228195 read=3239
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12556.16 rows=586218 width=0) (actual time=511.276..511.276 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=995241.29..995241.29 rows=1345988 width=4) (actual time=81900.089..81900.089 rows=13767175 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484003kB
                     Buffers: shared hit=697177 read=590257 dirtied=1359 written=4511
                     ->  HashAggregate  (cost=981781.41..995241.29 rows=1345988 width=4) (actual time=68728.264..78292.155 rows=13767175 loops=1)
                           Buffers: shared hit=697177 read=590257 dirtied=1359 written=4511
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..931394.29 rows=20154847 width=4) (actual time=0.291..34584.145 rows=37965693 loops=1)
                                 Buffers: shared hit=697177 read=590257 dirtied=1359 written=4511
 Total runtime: 98060.420 ms
(23 rows)

COMMIT;
COMMIT