BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-01-01'
	and o_orderdate < cast(date '1996-01-01' + 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=1127852.37..1127852.37 rows=1 width=16) (actual time=8048.696..8048.696 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2668496 read=351508
   ->  HashAggregate  (cost=1127852.35..1127852.36 rows=1 width=16) (actual time=8048.632..8048.634 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2668491 read=351508
         ->  Nested Loop Semi Join  (cost=11893.31..1127101.36 rows=150198 width=16) (actual time=275.730..7786.941 rows=520030 loops=1)
               Buffers: shared hit=2668491 read=351508
               ->  Bitmap Heap Scan on orders  (cost=11892.75..274338.76 rows=561201 width=20) (actual time=275.572..1843.410 rows=567176 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-01-01'::date) AND (o_orderdate < '1996-04-01'::date))
                     Heap Blocks: exact=228153
                     Buffers: shared hit=192366 read=37340
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11752.44 rows=561201 width=0) (actual time=188.777..188.777 rows=568818 loops=1)
                           Index Cond: ((o_orderdate >= '1996-01-01'::date) AND (o_orderdate < '1996-04-01'::date))
                           Buffers: shared read=1553
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.59 rows=5 width=4) (actual time=0.010..0.010 rows=1 loops=567176)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2476125 read=314168
 Planning time: 2.410 ms
 Execution time: 8050.209 ms
(21 rows)

COMMIT;
COMMIT