BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-08-01'
	and o_orderdate < cast(date '1994-08-01' + 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=1135443.90..1135443.91 rows=1 width=16) (actual time=9143.900..9143.900 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2531127 read=521283
   ->  HashAggregate  (cost=1135443.88..1135443.89 rows=1 width=16) (actual time=9143.818..9143.820 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2531122 read=521283
         ->  Nested Loop Semi Join  (cost=11959.58..1134673.43 rows=154090 width=16) (actual time=235.754..8870.857 rows=525903 loops=1)
               Buffers: shared hit=2531122 read=521283
               ->  Bitmap Heap Scan on orders  (cost=11959.02..273937.48 rows=563764 width=20) (actual time=235.581..1601.975 rows=573736 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-08-01'::date) AND (o_orderdate < '1994-11-01'::date))
                     Heap Blocks: exact=228378
                     Buffers: shared hit=228378 read=1569
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11818.07 rows=563764 width=0) (actual time=164.083..164.083 rows=573736 loops=1)
                           Index Cond: ((o_orderdate >= '1994-08-01'::date) AND (o_orderdate < '1994-11-01'::date))
                           Buffers: shared read=1569
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.58 rows=5 width=4) (actual time=0.012..0.012 rows=1 loops=573736)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2302744 read=519714
 Planning time: 4.186 ms
 Execution time: 9145.223 ms
(21 rows)

COMMIT;
COMMIT