BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-09-01'
	and o_orderdate < cast(date '1995-09-01' + 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=1132048.18..1132048.19 rows=1 width=16) (actual time=9547.868..9547.868 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2503538 read=516577 written=1
   ->  HashAggregate  (cost=1132048.16..1132048.17 rows=1 width=16) (actual time=9547.779..9547.780 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2503533 read=516577 written=1
         ->  Nested Loop Semi Join  (cost=11984.89..1131290.50 rows=151533 width=16) (actual time=272.901..9266.182 rows=519927 loops=1)
               Buffers: shared hit=2503533 read=516577 written=1
               ->  Bitmap Heap Scan on orders  (cost=11984.32..273982.25 rows=565062 width=20) (actual time=272.745..1672.370 rows=567409 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-09-01'::date) AND (o_orderdate < '1995-12-01'::date))
                     Heap Blocks: exact=227475
                     Buffers: shared hit=227475 read=1552
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11843.05 rows=565062 width=0) (actual time=185.996..185.996 rows=567409 loops=1)
                           Index Cond: ((o_orderdate >= '1995-09-01'::date) AND (o_orderdate < '1995-12-01'::date))
                           Buffers: shared read=1552
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.58 rows=5 width=4) (actual time=0.013..0.013 rows=1 loops=567409)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2276058 read=515025 written=1
 Planning time: 3.980 ms
 Execution time: 9548.924 ms
(21 rows)

COMMIT;
COMMIT