BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-11-01'
	and o_orderdate < cast(date '1993-11-01' + 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=1286822.09..1286822.10 rows=1 width=16) (actual time=99063.162..99063.163 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1175030 read=320269 written=5593
   ->  HashAggregate  (cost=1286822.07..1286822.08 rows=1 width=16) (actual time=99063.008..99063.010 rows=5 loops=1)
         Buffers: shared hit=1175025 read=320269 written=5593
         ->  Hash Join  (cost=1018418.80..1286060.38 rows=152338 width=16) (actual time=86331.221..98760.503 rows=525788 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1175025 read=320269 written=5593
               ->  Bitmap Heap Scan on orders  (cost=12156.46..274275.38 rows=573128 width=20) (actual time=572.630..2725.683 rows=573503 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-11-01'::date) AND (o_orderdate < '1994-02-01'::date))
                     Buffers: shared hit=228361 read=1571 written=5
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12013.18 rows=573128 width=0) (actual time=452.621..452.621 rows=574082 loops=1)
                           Index Cond: ((o_orderdate >= '1993-11-01'::date) AND (o_orderdate < '1994-02-01'::date))
                           Buffers: shared read=1571 written=5
               ->  Hash  (cost=989633.14..989633.14 rows=1330336 width=4) (actual time=85756.985..85756.985 rows=13753423 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483519kB
                     Buffers: shared hit=946664 read=318698 written=5588
                     ->  HashAggregate  (cost=976329.78..989633.14 rows=1330336 width=4) (actual time=71719.262..81815.125 rows=13753423 loops=1)
                           Buffers: shared hit=946664 read=318698 written=5588
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..926249.86 rows=20031968 width=4) (actual time=0.153..34116.025 rows=37928797 loops=1)
                                 Buffers: shared hit=946664 read=318698 written=5588
 Total runtime: 99421.468 ms
(23 rows)

COMMIT;
COMMIT