BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-02-01'
	and o_orderdate < cast(date '1995-02-01' + 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=1291124.68..1291124.69 rows=1 width=16) (actual time=85313.405..85313.406 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=668169 read=839381 written=12704
   ->  HashAggregate  (cost=1291124.66..1291124.67 rows=1 width=16) (actual time=85313.228..85313.229 rows=5 loops=1)
         Buffers: shared hit=668164 read=839381 written=12704
         ->  Hash Join  (cost=1022119.20..1290369.18 rows=151096 width=16) (actual time=73189.168..84986.390 rows=509300 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=668164 read=839381 written=12704
               ->  Bitmap Heap Scan on orders  (cost=11796.07..274674.70 rows=556309 width=20) (actual time=359.459..2458.005 rows=555249 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-02-01'::date) AND (o_orderdate < '1995-05-01'::date))
                     Buffers: shared hit=213457 read=15112
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11656.99 rows=556309 width=0) (actual time=270.221..270.221 rows=557477 loops=1)
                           Index Cond: ((o_orderdate >= '1995-02-01'::date) AND (o_orderdate < '1995-05-01'::date))
                           Buffers: shared hit=2 read=1523
               ->  Hash  (cost=993263.03..993263.03 rows=1364808 width=4) (actual time=72827.724..72827.724 rows=13767198 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484004kB
                     Buffers: shared hit=454707 read=824269 written=12704
                     ->  HashAggregate  (cost=979614.95..993263.03 rows=1364808 width=4) (actual time=57265.898..66968.563 rows=13767198 loops=1)
                           Buffers: shared hit=454707 read=824269 written=12704
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..929377.26 rows=20095075 width=4) (actual time=0.122..27182.098 rows=37966982 loops=1)
                                 Buffers: shared hit=454707 read=824269 written=12704
 Total runtime: 85524.848 ms
(23 rows)

COMMIT;
COMMIT