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=1302599.47..1302599.48 rows=1 width=16) (actual time=129513.884..129513.886 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1479626 read=47956 written=1255
   ->  HashAggregate  (cost=1302599.45..1302599.46 rows=1 width=16) (actual time=129513.646..129513.647 rows=5 loops=1)
         Buffers: shared hit=1479621 read=47956 written=1255
         ->  Hash Join  (cost=1030961.53..1301833.95 rows=153100 width=16) (actual time=105815.662..129090.717 rows=520521 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1479621 read=47956 written=1255
               ->  Bitmap Heap Scan on orders  (cost=12393.50..277763.82 rows=570488 width=20) (actual time=701.272..10447.009 rows=567535 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-04-01'::date) AND (o_orderdate < '1995-07-01'::date))
                     Buffers: shared hit=230628 read=1645
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12250.87 rows=570488 width=0) (actual time=578.154..578.154 rows=575057 loops=1)
                           Index Cond: ((o_orderdate >= '1995-04-01'::date) AND (o_orderdate < '1995-07-01'::date))
                           Buffers: shared hit=2 read=1645
               ->  Hash  (cost=1001560.45..1001560.45 rows=1360607 width=4) (actual time=105112.588..105112.588 rows=13767230 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484005kB
                     Buffers: shared hit=1248993 read=46311 written=1255
                     ->  HashAggregate  (cost=987954.38..1001560.45 rows=1360607 width=4) (actual time=90276.475..100198.906 rows=13767230 loops=1)
                           Buffers: shared hit=1248993 read=46311 written=1255
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..937267.40 rows=20274793 width=4) (actual time=0.130..52374.979 rows=37966096 loops=1)
                                 Buffers: shared hit=1248993 read=46311 written=1255
 Total runtime: 129772.262 ms
(23 rows)

COMMIT;
COMMIT