BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-12-01'
	and o_orderdate < cast(date '1996-12-01' + 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=1140266.99..1140266.99 rows=1 width=16) (actual time=10251.788..10251.789 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2626861 read=369890 written=2
   ->  HashAggregate  (cost=1140266.97..1140266.98 rows=1 width=16) (actual time=10251.721..10251.722 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2626856 read=369890 written=2
         ->  Nested Loop Semi Join  (cost=12056.25..1139496.88 rows=154017 width=16) (actual time=384.004..9981.900 rows=515968 loops=1)
               Buffers: shared hit=2626856 read=369890 written=2
               ->  Bitmap Heap Scan on orders  (cost=12055.68..274617.21 rows=568902 width=20) (actual time=383.902..2817.166 rows=562476 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-12-01'::date) AND (o_orderdate < '1997-03-01'::date))
                     Heap Blocks: exact=227792
                     Buffers: shared hit=128047 read=101283 written=2
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11913.45 rows=568902 width=0) (actual time=280.885..280.885 rows=563643 loops=1)
                           Index Cond: ((o_orderdate >= '1996-12-01'::date) AND (o_orderdate < '1997-03-01'::date))
                           Buffers: shared read=1538 written=2
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.57 rows=5 width=4) (actual time=0.012..0.012 rows=1 loops=562476)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2498809 read=268607
 Planning time: 2.828 ms
 Execution time: 10253.920 ms
(21 rows)

COMMIT;
COMMIT