BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-08-01'
	and o_orderdate < cast(date '1994-08-01' + 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=1291625.27..1291625.28 rows=1 width=16) (actual time=155318.874..155318.875 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=989557 read=524879 dirtied=71 written=2664
   ->  HashAggregate  (cost=1291625.25..1291625.26 rows=1 width=16) (actual time=155318.718..155318.720 rows=5 loops=1)
         Buffers: shared hit=989552 read=524879 dirtied=71 written=2664
         ->  Hash Join  (cost=1022061.24..1290842.82 rows=156487 width=16) (actual time=134289.560..154864.003 rows=525881 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=989552 read=524879 dirtied=71 written=2664
               ->  Bitmap Heap Scan on orders  (cost=12253.73..275456.76 rows=577935 width=20) (actual time=744.336..11423.914 rows=573720 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-08-01'::date) AND (o_orderdate < '1994-11-01'::date))
                     Buffers: shared hit=179489 read=51376 dirtied=57 written=2565
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12109.25 rows=577935 width=0) (actual time=630.099..630.099 rows=576026 loops=1)
                           Index Cond: ((o_orderdate >= '1994-08-01'::date) AND (o_orderdate < '1994-11-01'::date))
                           Buffers: shared hit=79 read=1496
               ->  Hash  (cost=992799.92..992799.92 rows=1360607 width=4) (actual time=133543.188..133543.188 rows=13767198 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484004kB
                     Buffers: shared hit=810063 read=473503 dirtied=14 written=99
                     ->  HashAggregate  (cost=979193.85..992799.92 rows=1360607 width=4) (actual time=116487.883..127292.525 rows=13767198 loops=1)
                           Buffers: shared hit=810063 read=473503 dirtied=14 written=99
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..928956.30 rows=20095020 width=4) (actual time=0.260..76418.966 rows=37966982 loops=1)
                                 Buffers: shared hit=810063 read=473503 dirtied=14 written=99
 Total runtime: 155601.630 ms
(23 rows)

COMMIT;
COMMIT