BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-07-01'
	and o_orderdate < cast(date '1993-07-01' + 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=1301602.13..1301602.14 rows=1 width=16) (actual time=74871.733..74871.735 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=631695 read=890364 dirtied=301 written=113
   ->  HashAggregate  (cost=1301602.11..1301602.12 rows=1 width=16) (actual time=74871.579..74871.580 rows=5 loops=1)
         Buffers: shared hit=631690 read=890364 dirtied=301 written=113
         ->  Hash Join  (cost=1029909.71..1300819.57 rows=156508 width=16) (actual time=62425.659..74601.797 rows=526210 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=631690 read=890364 dirtied=301 written=113
               ->  Bitmap Heap Scan on orders  (cost=12645.94..277939.53 rows=582239 width=20) (actual time=520.533..2848.514 rows=573846 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-07-01'::date) AND (o_orderdate < '1993-10-01'::date))
                     Buffers: shared hit=119277 read=113359 written=28
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12500.38 rows=582239 width=0) (actual time=389.862..389.862 rows=581038 loops=1)
                           Index Cond: ((o_orderdate >= '1993-07-01'::date) AND (o_orderdate < '1993-10-01'::date))
                           Buffers: shared hit=2 read=1660 written=4
               ->  Hash  (cost=1000245.19..1000245.19 rows=1361486 width=4) (actual time=61903.224..61903.224 rows=13753463 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483521kB
                     Buffers: shared hit=512413 read=777005 dirtied=301 written=85
                     ->  HashAggregate  (cost=986630.33..1000245.19 rows=1361486 width=4) (actual time=49069.777..58306.703 rows=13753463 loops=1)
                           Buffers: shared hit=512413 read=777005 dirtied=301 written=85
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..935992.73 rows=20255041 width=4) (actual time=0.182..21429.726 rows=37928434 loops=1)
                                 Buffers: shared hit=512413 read=777005 dirtied=301 written=85
 Total runtime: 75122.678 ms
(23 rows)

COMMIT;
COMMIT