BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-02-01'
	and o_orderdate < cast(date '1995-02-01' + 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=1135442.11..1135442.12 rows=1 width=16) (actual time=8827.383..8827.383 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2579624 read=381596 dirtied=225 written=436
   ->  HashAggregate  (cost=1135442.09..1135442.10 rows=1 width=16) (actual time=8827.328..8827.330 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2579619 read=381596 dirtied=225 written=436
         ->  Nested Loop Semi Join  (cost=12202.19..1134680.89 rows=152240 width=16) (actual time=286.906..8570.689 rows=509258 loops=1)
               Buffers: shared hit=2579619 read=381596 dirtied=225 written=436
               ->  Bitmap Heap Scan on orders  (cost=12201.62..276180.63 rows=562067 width=20) (actual time=286.814..2054.777 rows=555219 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-02-01'::date) AND (o_orderdate < '1995-05-01'::date))
                     Heap Blocks: exact=227946
                     Buffers: shared hit=167802 read=61740 dirtied=225 written=78
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12061.10 rows=562067 width=0) (actual time=209.694..209.694 rows=559673 loops=1)
                           Index Cond: ((o_orderdate >= '1995-02-01'::date) AND (o_orderdate < '1995-05-01'::date))
                           Buffers: shared read=1596
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.60 rows=5 width=4) (actual time=0.011..0.011 rows=1 loops=555219)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2411817 read=319856 written=358
 Planning time: 2.563 ms
 Execution time: 8828.813 ms
(21 rows)

COMMIT;
COMMIT