BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-03-01'
	and o_orderdate < cast(date '1995-03-01' + 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=1147698.03..1147698.04 rows=1 width=16) (actual time=12443.922..12443.924 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2814086 read=239150 dirtied=221 written=3396
   ->  HashAggregate  (cost=1147698.01..1147698.02 rows=1 width=16) (actual time=12443.863..12443.866 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2814081 read=239150 dirtied=221 written=3396
         ->  Nested Loop Semi Join  (cost=12169.86..1146913.93 rows=156817 width=16) (actual time=610.238..12057.262 rows=525975 loops=1)
               Buffers: shared hit=2814081 read=239150 dirtied=221 written=3396
               ->  Bitmap Heap Scan on orders  (cost=12169.29..274297.42 rows=573742 width=20) (actual time=610.176..3022.163 rows=573885 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-03-01'::date) AND (o_orderdate < '1995-06-01'::date))
                     Heap Blocks: exact=228560
                     Buffers: shared hit=166409 read=63722 dirtied=221 written=1367
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12025.85 rows=573742 width=0) (actual time=481.270..481.270 rows=574418 loops=1)
                           Index Cond: ((o_orderdate >= '1995-03-01'::date) AND (o_orderdate < '1995-06-01'::date))
                           Buffers: shared read=1571
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.56 rows=5 width=4) (actual time=0.015..0.015 rows=1 loops=573885)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2647672 read=175428 written=2029
 Planning time: 2.379 ms
 Execution time: 12446.945 ms
(21 rows)

COMMIT;
COMMIT