BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-04-01'
	and o_orderdate < cast(date '1995-04-01' + 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=1150571.19..1150571.19 rows=1 width=16) (actual time=10972.212..10972.212 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2845378 read=177628
   ->  HashAggregate  (cost=1150571.17..1150571.18 rows=1 width=16) (actual time=10972.144..10972.147 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2845373 read=177628
         ->  Nested Loop Semi Join  (cost=12187.47..1149787.08 rows=156817 width=16) (actual time=323.620..10619.060 rows=520666 loops=1)
               Buffers: shared hit=2845373 read=177628
               ->  Bitmap Heap Scan on orders  (cost=12186.90..275099.80 rows=575460 width=20) (actual time=323.534..2384.079 rows=567722 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-04-01'::date) AND (o_orderdate < '1995-07-01'::date))
                     Heap Blocks: exact=228345
                     Buffers: shared hit=200885 read=29013
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12043.03 rows=575460 width=0) (actual time=240.967..240.967 rows=569410 loops=1)
                           Index Cond: ((o_orderdate >= '1995-04-01'::date) AND (o_orderdate < '1995-07-01'::date))
                           Buffers: shared hit=1 read=1552
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.56 rows=5 width=4) (actual time=0.013..0.013 rows=1 loops=567722)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2644488 read=148615
 Planning time: 2.959 ms
 Execution time: 10974.104 ms
(21 rows)

COMMIT;
COMMIT