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=1146616.69..1146616.70 rows=1 width=16) (actual time=9861.077..9861.077 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2628571 read=393356 dirtied=767 written=2490
   ->  HashAggregate  (cost=1146616.67..1146616.68 rows=1 width=16) (actual time=9861.008..9861.011 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2628566 read=393356 dirtied=767 written=2490
         ->  Nested Loop Semi Join  (cost=12431.31..1145847.33 rows=153869 width=16) (actual time=311.218..9583.581 rows=519885 loops=1)
               Buffers: shared hit=2628566 read=393356 dirtied=767 written=2490
               ->  Bitmap Heap Scan on orders  (cost=12430.75..276816.59 rows=572323 width=20) (actual time=311.116..2555.605 rows=567337 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-09-01'::date) AND (o_orderdate < '1995-12-01'::date))
                     Heap Blocks: exact=229543
                     Buffers: shared hit=137479 read=93700 dirtied=438 written=720
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12287.66 rows=572323 width=0) (actual time=233.044..233.044 rows=572540 loops=1)
                           Index Cond: ((o_orderdate >= '1995-09-01'::date) AND (o_orderdate < '1995-12-01'::date))
                           Buffers: shared hit=97 read=1539 written=129
               ->  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=567337)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2491087 read=299656 dirtied=329 written=1770
 Planning time: 2.688 ms
 Execution time: 9862.732 ms
(21 rows)

COMMIT;
COMMIT