BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-01-01'
	and o_orderdate < cast(date '1995-01-01' + 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=1132367.14..1132367.14 rows=1 width=16) (actual time=8615.667..8615.667 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2855029 read=140602 dirtied=88 written=472
   ->  HashAggregate  (cost=1132367.12..1132367.13 rows=1 width=16) (actual time=8615.607..8615.609 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2855024 read=140602 dirtied=88 written=472
         ->  Nested Loop Semi Join  (cost=12160.99..1131611.27 rows=151170 width=16) (actual time=308.517..8359.733 rows=515521 loops=1)
               Buffers: shared hit=2855024 read=140602 dirtied=88 written=472
               ->  Bitmap Heap Scan on orders  (cost=12160.43..275872.98 rows=561170 width=20) (actual time=308.448..1925.235 rows=562068 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-01-01'::date) AND (o_orderdate < '1995-04-01'::date))
                     Heap Blocks: exact=228709
                     Buffers: shared hit=223971 read=6348 dirtied=88 written=38
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12020.14 rows=561170 width=0) (actual time=227.681..227.681 rows=566051 loops=1)
                           Index Cond: ((o_orderdate >= '1995-01-01'::date) AND (o_orderdate < '1995-04-01'::date))
                           Buffers: shared hit=111 read=1499 written=25
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.60 rows=5 width=4) (actual time=0.011..0.011 rows=1 loops=562068)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2631053 read=134254 written=434
 Planning time: 2.570 ms
 Execution time: 8618.767 ms
(21 rows)

COMMIT;
COMMIT