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=1296082.72..1296082.72 rows=1 width=16) (actual time=94778.727..94778.727 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=869542 read=649824 dirtied=1366 written=20957
   ->  HashAggregate  (cost=1296082.70..1296082.71 rows=1 width=16) (actual time=94778.556..94778.558 rows=5 loops=1)
         Buffers: shared hit=869537 read=649824 dirtied=1366 written=20957
         ->  Hash Join  (cost=1025554.13..1295313.30 rows=153880 width=16) (actual time=82207.679..94422.790 rows=520138 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=869537 read=649824 dirtied=1366 written=20957
               ->  Bitmap Heap Scan on orders  (cost=12521.86..276721.38 rows=576768 width=20) (actual time=625.994..3248.844 rows=567504 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-04-01'::date) AND (o_orderdate < '1996-07-01'::date))
                     Buffers: shared hit=228612 read=2061
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12377.66 rows=576768 width=0) (actual time=460.070..460.070 rows=572000 loops=1)
                           Index Cond: ((o_orderdate >= '1996-04-01'::date) AND (o_orderdate < '1996-07-01'::date))
                           Buffers: shared read=1636
               ->  Hash  (cost=996207.42..996207.42 rows=1345988 width=4) (actual time=81579.530..81579.530 rows=13767115 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484001kB
                     Buffers: shared hit=640925 read=647763 dirtied=1366 written=20957
                     ->  HashAggregate  (cost=982747.54..996207.42 rows=1345988 width=4) (actual time=67721.650..77833.727 rows=13767115 loops=1)
                           Buffers: shared hit=640925 read=647763 dirtied=1366 written=20957
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..932310.78 rows=20174703 width=4) (actual time=0.205..32835.845 rows=37965325 loops=1)
                                 Buffers: shared hit=640925 read=647763 dirtied=1366 written=20957
 Total runtime: 95046.004 ms
(23 rows)

COMMIT;
COMMIT