BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-10-01'
	and o_orderdate < cast(date '1994-10-01' + 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=1288212.47..1288212.48 rows=1 width=16) (actual time=106487.232..106487.232 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=845481 read=661524 dirtied=1332 written=523
   ->  HashAggregate  (cost=1288212.45..1288212.46 rows=1 width=16) (actual time=106487.071..106487.074 rows=5 loops=1)
         Buffers: shared hit=845476 read=661524 dirtied=1332 written=523
         ->  Hash Join  (cost=1019477.33..1287447.48 rows=152995 width=16) (actual time=91917.871..106082.143 rows=527108 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=845476 read=661524 dirtied=1332 written=523
               ->  Bitmap Heap Scan on orders  (cost=11986.94..274498.41 rows=565565 width=20) (actual time=742.262..3453.391 rows=574981 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-10-01'::date) AND (o_orderdate < '1995-01-01'::date))
                     Buffers: shared hit=226957 read=3639 dirtied=2 written=111
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11845.55 rows=565565 width=0) (actual time=523.260..523.260 rows=576146 loops=1)
                           Index Cond: ((o_orderdate >= '1994-10-01'::date) AND (o_orderdate < '1995-01-01'::date))
                           Buffers: shared hit=94 read=1479 written=26
               ->  Hash  (cost=990532.39..990532.39 rows=1356640 width=4) (actual time=91171.712..91171.712 rows=13767168 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484002kB
                     Buffers: shared hit=618519 read=657885 dirtied=1330 written=412
                     ->  HashAggregate  (cost=976965.99..990532.39 rows=1356640 width=4) (actual time=74463.870..85741.389 rows=13767168 loops=1)
                           Buffers: shared hit=618519 read=657885 dirtied=1330 written=412
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..926828.05 rows=20055178 width=4) (actual time=0.232..35144.644 rows=37966418 loops=1)
                                 Buffers: shared hit=618519 read=657885 dirtied=1330 written=412
 Total runtime: 106857.590 ms
(23 rows)

COMMIT;
COMMIT