BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-07-01'
	and o_orderdate < cast(date '1993-07-01' + 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=1303715.93..1303715.94 rows=1 width=16) (actual time=123018.067..123018.067 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1038066 read=496197 dirtied=602 written=3429
   ->  HashAggregate  (cost=1303715.91..1303715.92 rows=1 width=16) (actual time=123017.927..123017.929 rows=5 loops=1)
         Buffers: shared hit=1038061 read=496197 dirtied=602 written=3429
         ->  Hash Join  (cost=1031643.89..1302957.53 rows=151676 width=16) (actual time=110702.710..122722.457 rows=526745 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1038061 read=496197 dirtied=602 written=3429
               ->  Bitmap Heap Scan on orders  (cost=12568.78..278313.97 rows=578613 width=20) (actual time=1622.357..3171.961 rows=574411 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-07-01'::date) AND (o_orderdate < '1993-10-01'::date))
                     Buffers: shared hit=231248 read=1855 written=264
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12424.13 rows=578613 width=0) (actual time=1490.893..1490.893 rows=582175 loops=1)
                           Index Cond: ((o_orderdate >= '1993-07-01'::date) AND (o_orderdate < '1993-10-01'::date))
                           Buffers: shared hit=106 read=1563 written=264
               ->  Hash  (cost=1002445.91..1002445.91 rows=1330336 width=4) (actual time=109078.193..109078.193 rows=13767174 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484003kB
                     Buffers: shared hit=806813 read=494342 dirtied=602 written=3165
                     ->  HashAggregate  (cost=989142.55..1002445.91 rows=1330336 width=4) (actual time=94525.909..103662.258 rows=13767174 loops=1)
                           Buffers: shared hit=806813 read=494342 dirtied=602 written=3165
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..938405.29 rows=20294901 width=4) (actual time=0.191..56485.400 rows=37965829 loops=1)
                                 Buffers: shared hit=806813 read=494342 dirtied=602 written=3165
 Total runtime: 123300.914 ms
(23 rows)

COMMIT;
COMMIT