BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-02-01'
	and o_orderdate < cast(date '1997-02-01' + 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=1118870.88..1118870.88 rows=1 width=16) (actual time=9363.334..9363.336 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2586199 read=374644 written=33
   ->  HashAggregate  (cost=1118870.86..1118870.87 rows=1 width=16) (actual time=9363.272..9363.273 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2586194 read=374644 written=33
         ->  Nested Loop Semi Join  (cost=11733.97..1118127.19 rows=148733 width=16) (actual time=303.162..9102.875 rows=509385 loops=1)
               Buffers: shared hit=2586194 read=374644 written=33
               ->  Bitmap Heap Scan on orders  (cost=11733.40..273810.30 rows=553460 width=20) (actual time=303.058..2152.451 rows=555445 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-02-01'::date) AND (o_orderdate < '1997-05-01'::date))
                     Heap Blocks: exact=226599
                     Buffers: shared hit=161726 read=66392 written=3
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11595.03 rows=553460 width=0) (actual time=222.085..222.085 rows=556009 loops=1)
                           Index Cond: ((o_orderdate >= '1997-02-01'::date) AND (o_orderdate < '1997-05-01'::date))
                           Buffers: shared read=1519
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.61 rows=5 width=4) (actual time=0.012..0.012 rows=1 loops=555445)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2424468 read=308252 written=30
 Planning time: 2.902 ms
 Execution time: 9365.849 ms
(21 rows)

COMMIT;
COMMIT