BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-04-01'
	and o_orderdate < cast(date '1996-04-01' + 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=1146427.48..1146427.49 rows=1 width=16) (actual time=9080.270..9080.271 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2503196 read=517359 written=2
   ->  HashAggregate  (cost=1146427.46..1146427.47 rows=1 width=16) (actual time=9080.178..9080.180 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2503191 read=517359 written=2
         ->  Nested Loop Semi Join  (cost=12113.27..1145640.99 rows=157294 width=16) (actual time=251.335..8813.161 rows=520179 loops=1)
               Buffers: shared hit=2503191 read=517359 written=2
               ->  Bitmap Heap Scan on orders  (cost=12112.70..274199.00 rows=570953 width=20) (actual time=251.142..1465.820 rows=567511 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-04-01'::date) AND (o_orderdate < '1996-07-01'::date))
                     Heap Blocks: exact=227224
                     Buffers: shared hit=227224 read=1552
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11969.96 rows=570953 width=0) (actual time=171.102..171.102 rows=567511 loops=1)
                           Index Cond: ((o_orderdate >= '1996-04-01'::date) AND (o_orderdate < '1996-07-01'::date))
                           Buffers: shared read=1552
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.56 rows=5 width=4) (actual time=0.012..0.012 rows=1 loops=567511)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2275967 read=515807 written=2
 Planning time: 4.029 ms
 Execution time: 9082.014 ms
(21 rows)

COMMIT;
COMMIT