BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-03-01'
	and o_orderdate < cast(date '1994-03-01' + 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=1159746.64..1159746.64 rows=1 width=16) (actual time=10811.082..10811.083 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2755132 read=297002 written=3814
   ->  HashAggregate  (cost=1159746.62..1159746.63 rows=1 width=16) (actual time=10811.000..10811.002 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2755127 read=297002 written=3814
         ->  Nested Loop Semi Join  (cost=12628.52..1158959.12 rows=157499 width=16) (actual time=553.149..10452.506 rows=525766 loops=1)
               Buffers: shared hit=2755127 read=297002 written=3814
               ->  Bitmap Heap Scan on orders  (cost=12627.96..277150.21 rows=581417 width=20) (actual time=552.994..2969.751 rows=573186 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-03-01'::date) AND (o_orderdate < '1994-06-01'::date))
                     Heap Blocks: exact=230425
                     Buffers: shared hit=150660 read=81421 written=767
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12482.60 rows=581417 width=0) (actual time=375.082..375.082 rows=578865 loops=1)
                           Index Cond: ((o_orderdate >= '1994-03-01'::date) AND (o_orderdate < '1994-06-01'::date))
                           Buffers: shared hit=1 read=1655 written=3
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.56 rows=5 width=4) (actual time=0.012..0.012 rows=1 loops=573186)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2604467 read=215581 written=3047
 Planning time: 3.861 ms
 Execution time: 10815.070 ms
(21 rows)

COMMIT;
COMMIT