BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-10-01'
	and o_orderdate < cast(date '1993-10-01' + 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=1149874.90..1149874.91 rows=1 width=16) (actual time=10591.451..10591.452 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2530780 read=521302
   ->  HashAggregate  (cost=1149874.88..1149874.89 rows=1 width=16) (actual time=10591.355..10591.357 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2530775 read=521302
         ->  Nested Loop Semi Join  (cost=12245.04..1149092.04 rows=156569 width=16) (actual time=228.609..10317.836 rows=525843 loops=1)
               Buffers: shared hit=2530775 read=521302
               ->  Bitmap Heap Scan on orders  (cost=12244.48..274424.10 rows=577175 width=20) (actual time=228.467..1720.144 rows=573713 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-10-01'::date) AND (o_orderdate < '1994-01-01'::date))
                     Heap Blocks: exact=228243
                     Buffers: shared hit=228243 read=1569
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12100.18 rows=577175 width=0) (actual time=161.252..161.252 rows=573713 loops=1)
                           Index Cond: ((o_orderdate >= '1993-10-01'::date) AND (o_orderdate < '1994-01-01'::date))
                           Buffers: shared read=1569
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.55 rows=5 width=4) (actual time=0.014..0.014 rows=1 loops=573713)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2302532 read=519733
 Planning time: 4.224 ms
 Execution time: 10593.156 ms
(21 rows)

COMMIT;
COMMIT