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=1164140.09..1164140.09 rows=1 width=16) (actual time=8362.305..8362.305 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2804834 read=248955 dirtied=35 written=67
   ->  HashAggregate  (cost=1164140.07..1164140.08 rows=1 width=16) (actual time=8362.244..8362.246 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2804829 read=248955 dirtied=35 written=67
         ->  Nested Loop Semi Join  (cost=12619.44..1163344.89 rows=159036 width=16) (actual time=307.655..8085.706 rows=526213 loops=1)
               Buffers: shared hit=2804829 read=248955 dirtied=35 written=67
               ->  Bitmap Heap Scan on orders  (cost=12618.87..276449.78 rows=585994 width=20) (actual time=307.595..1696.043 rows=573670 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-03-01'::date) AND (o_orderdate < '1994-06-01'::date))
                     Heap Blocks: exact=229723
                     Buffers: shared hit=212327 read=19021 dirtied=35 written=3
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12472.38 rows=585994 width=0) (actual time=228.202..228.202 rows=577084 loops=1)
                           Index Cond: ((o_orderdate >= '1994-03-01'::date) AND (o_orderdate < '1994-06-01'::date))
                           Buffers: shared hit=1 read=1624
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.54 rows=5 width=4) (actual time=0.010..0.010 rows=1 loops=573670)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2592502 read=229934 written=64
 Planning time: 2.778 ms
 Execution time: 8363.819 ms
(21 rows)

COMMIT;
COMMIT