BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-03-01'
	and o_orderdate < cast(date '1997-03-01' + 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=1155439.43..1155439.44 rows=1 width=16) (actual time=8461.556..8461.557 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2709275 read=347093 written=261
   ->  HashAggregate  (cost=1155439.41..1155439.42 rows=1 width=16) (actual time=8461.494..8461.497 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2709270 read=347093 written=261
         ->  Nested Loop Semi Join  (cost=12422.05..1154649.51 rows=157981 width=16) (actual time=245.072..8198.563 rows=526339 loops=1)
               Buffers: shared hit=2709270 read=347093 written=261
               ->  Bitmap Heap Scan on orders  (cost=12421.49..276115.73 rows=576883 width=20) (actual time=244.931..1552.921 rows=574310 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-03-01'::date) AND (o_orderdate < '1997-06-01'::date))
                     Heap Blocks: exact=229562
                     Buffers: shared hit=228154 read=3041
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12277.26 rows=576883 width=0) (actual time=174.211..174.211 rows=577724 loops=1)
                           Index Cond: ((o_orderdate >= '1997-03-01'::date) AND (o_orderdate < '1997-06-01'::date))
                           Buffers: shared read=1633
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.56 rows=5 width=4) (actual time=0.011..0.011 rows=1 loops=574310)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2481116 read=344052 written=261
 Planning time: 2.340 ms
 Execution time: 8464.625 ms
(21 rows)

COMMIT;
COMMIT