BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-03-01'
	and o_orderdate < cast(date '1994-03-01' + 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=1133212.32..1133212.32 rows=1 width=16) (actual time=9123.263..9123.264 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2530987 read=521420
   ->  HashAggregate  (cost=1133212.30..1133212.31 rows=1 width=16) (actual time=9123.177..9123.178 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2530982 read=521420
         ->  Nested Loop Semi Join  (cost=11991.95..1132451.89 rows=152082 width=16) (actual time=253.505..8843.680 rows=526218 loops=1)
               Buffers: shared hit=2530982 read=521420
               ->  Bitmap Heap Scan on orders  (cost=11991.39..273993.80 rows=565361 width=20) (actual time=253.346..1468.543 rows=573681 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-03-01'::date) AND (o_orderdate < '1994-06-01'::date))
                     Heap Blocks: exact=228337
                     Buffers: shared hit=228337 read=1569
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11850.05 rows=565361 width=0) (actual time=172.817..172.817 rows=573681 loops=1)
                           Index Cond: ((o_orderdate >= '1994-03-01'::date) AND (o_orderdate < '1994-06-01'::date))
                           Buffers: shared read=1569
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.58 rows=5 width=4) (actual time=0.012..0.012 rows=1 loops=573681)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2302645 read=519851
 Planning time: 3.984 ms
 Execution time: 9124.387 ms
(21 rows)

COMMIT;
COMMIT