BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-01-01'
	and o_orderdate < cast(date '1993-01-01' + 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=1287377.51..1287377.52 rows=1 width=16) (actual time=80640.691..80640.692 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=726267 read=774576 written=17179
   ->  HashAggregate  (cost=1287377.49..1287377.50 rows=1 width=16) (actual time=80640.565..80640.566 rows=5 loops=1)
         Buffers: shared hit=726262 read=774576 written=17179
         ->  Hash Join  (cost=1018970.80..1286640.90 rows=147319 width=16) (actual time=68954.797..80394.960 rows=515991 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=726262 read=774576 written=17179
               ->  Bitmap Heap Scan on orders  (cost=11733.61..274067.53 rows=553728 width=20) (actual time=552.950..2390.290 rows=562703 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-01-01'::date) AND (o_orderdate < '1993-04-01'::date))
                     Buffers: shared hit=169173 read=59875
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11595.18 rows=553728 width=0) (actual time=425.853..425.853 rows=563798 loops=1)
                           Index Cond: ((o_orderdate >= '1993-01-01'::date) AND (o_orderdate < '1993-04-01'::date))
                           Buffers: shared read=1540
               ->  Hash  (cost=990559.30..990559.30 rows=1334231 width=4) (actual time=68399.773..68399.773 rows=13767168 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484002kB
                     Buffers: shared hit=557089 read=714701 written=17179
                     ->  HashAggregate  (cost=977216.99..990559.30 rows=1334231 width=4) (actual time=56677.114..65046.207 rows=13767168 loops=1)
                           Buffers: shared hit=557089 read=714701 written=17179
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..927078.67 rows=20055328 width=4) (actual time=0.229..23321.407 rows=37966418 loops=1)
                                 Buffers: shared hit=557089 read=714701 written=17179
 Total runtime: 80996.133 ms
(23 rows)

COMMIT;
COMMIT