BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-07-01'
	and o_orderdate < cast(date '1997-07-01' + 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=1158228.37..1158228.37 rows=1 width=16) (actual time=9676.390..9676.390 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2840729 read=215874 written=7
   ->  HashAggregate  (cost=1158228.35..1158228.36 rows=1 width=16) (actual time=9676.306..9676.307 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2840724 read=215874 written=7
         ->  Nested Loop Semi Join  (cost=12343.83..1157433.59 rows=158951 width=16) (actual time=323.319..9400.834 rows=526464 loops=1)
               Buffers: shared hit=2840724 read=215874 written=7
               ->  Bitmap Heap Scan on orders  (cost=12343.27..274850.22 rows=582130 width=20) (actual time=323.183..1839.989 rows=574577 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-07-01'::date) AND (o_orderdate < '1997-10-01'::date))
                     Heap Blocks: exact=228708
                     Buffers: shared hit=226939 read=3341
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12197.73 rows=582130 width=0) (actual time=243.168..243.168 rows=575135 loops=1)
                           Index Cond: ((o_orderdate >= '1997-07-01'::date) AND (o_orderdate < '1997-10-01'::date))
                           Buffers: shared read=1572
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.54 rows=5 width=4) (actual time=0.012..0.012 rows=1 loops=574577)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2613785 read=212533 written=7
 Planning time: 2.869 ms
 Execution time: 9679.105 ms
(21 rows)

COMMIT;
COMMIT