BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-02-01'
	and o_orderdate < cast(date '1997-02-01' + 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=1139248.67..1139248.67 rows=1 width=16) (actual time=9677.015..9677.017 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2783497 read=178512
   ->  HashAggregate  (cost=1139248.65..1139248.66 rows=1 width=16) (actual time=9676.949..9676.950 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2783492 read=178512
         ->  Nested Loop Semi Join  (cost=11998.64..1138478.20 rows=154090 width=16) (actual time=383.494..9346.944 rows=509444 loops=1)
               Buffers: shared hit=2783492 read=178512
               ->  Bitmap Heap Scan on orders  (cost=11998.08..275022.29 rows=566014 width=20) (actual time=383.358..2480.918 rows=555549 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-02-01'::date) AND (o_orderdate < '1997-05-01'::date))
                     Heap Blocks: exact=227290
                     Buffers: shared hit=187052 read=41763
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11856.57 rows=566014 width=0) (actual time=272.384..272.384 rows=557735 loops=1)
                           Index Cond: ((o_orderdate >= '1997-02-01'::date) AND (o_orderdate < '1997-05-01'::date))
                           Buffers: shared hit=1044 read=481
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.58 rows=5 width=4) (actual time=0.011..0.011 rows=1 loops=555549)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2596440 read=136749
 Planning time: 2.967 ms
 Execution time: 9680.579 ms
(21 rows)

COMMIT;
COMMIT