BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-04-01'
	and o_orderdate < cast(date '1995-04-01' + 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=1290946.83..1290946.83 rows=1 width=16) (actual time=69367.388..69367.389 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1392873 read=116247 written=11
   ->  HashAggregate  (cost=1290946.81..1290946.82 rows=1 width=16) (actual time=69367.225..69367.226 rows=5 loops=1)
         Buffers: shared hit=1392868 read=116247 written=11
         ->  Hash Join  (cost=1021423.94..1290180.35 rows=153291 width=16) (actual time=57700.708..69147.362 rows=520667 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1392868 read=116247 written=11
               ->  Bitmap Heap Scan on orders  (cost=12239.47..275433.33 rows=577324 width=20) (actual time=232.022..1704.666 rows=567724 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-04-01'::date) AND (o_orderdate < '1995-07-01'::date))
                     Buffers: shared hit=227506 read=2633 written=10
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12095.14 rows=577324 width=0) (actual time=163.884..163.884 rows=569992 loops=1)
                           Index Cond: ((o_orderdate >= '1995-04-01'::date) AND (o_orderdate < '1995-07-01'::date))
                           Buffers: shared read=1564
               ->  Hash  (cost=992506.58..992506.58 rows=1334231 width=4) (actual time=57466.774..57466.774 rows=13767198 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484004kB
                     Buffers: shared hit=1165362 read=113614 written=1
                     ->  HashAggregate  (cost=979164.27..992506.58 rows=1334231 width=4) (actual time=43104.896..52217.427 rows=13767198 loops=1)
                           Buffers: shared hit=1165362 read=113614 written=1
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..928925.92 rows=20095341 width=4) (actual time=0.155..17858.556 rows=37966982 loops=1)
                                 Buffers: shared hit=1165362 read=113614 written=1
 Total runtime: 69615.524 ms
(23 rows)

COMMIT;
COMMIT