BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-09-01'
	and o_orderdate < cast(date '1996-09-01' + 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=1120760.56..1120760.57 rows=1 width=16) (actual time=8587.231..8587.231 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2780248 read=237311 written=50
   ->  HashAggregate  (cost=1120760.54..1120760.55 rows=1 width=16) (actual time=8587.168..8587.170 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2780243 read=237311 written=50
         ->  Nested Loop Semi Join  (cost=11731.74..1120010.91 rows=149927 width=16) (actual time=305.266..8328.778 rows=519640 loops=1)
               Buffers: shared hit=2780243 read=237311 written=50
               ->  Bitmap Heap Scan on orders  (cost=11731.18..273804.82 rows=553243 width=20) (actual time=305.165..1706.395 rows=566775 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-09-01'::date) AND (o_orderdate < '1996-12-01'::date))
                     Heap Blocks: exact=227782
                     Buffers: shared hit=221617 read=7715
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11592.86 rows=553243 width=0) (actual time=224.972..224.972 rows=567367 loops=1)
                           Index Cond: ((o_orderdate >= '1996-09-01'::date) AND (o_orderdate < '1996-12-01'::date))
                           Buffers: shared read=1550
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.61 rows=5 width=4) (actual time=0.011..0.011 rows=1 loops=566775)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2558626 read=229596 written=50
 Planning time: 2.603 ms
 Execution time: 8590.091 ms
(21 rows)

COMMIT;
COMMIT