BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-07-01'
	and o_orderdate < cast(date '1996-07-01' + 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=1295278.76..1295278.76 rows=1 width=16) (actual time=86859.442..86859.443 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1134427 read=379964 written=2964
   ->  HashAggregate  (cost=1295278.74..1295278.75 rows=1 width=16) (actual time=86859.302..86859.303 rows=5 loops=1)
         Buffers: shared hit=1134422 read=379964 written=2964
         ->  Hash Join  (cost=1025043.46..1294510.52 rows=153644 width=16) (actual time=75183.291..86514.319 rows=527302 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1134422 read=379964 written=2964
               ->  Bitmap Heap Scan on orders  (cost=12465.30..276387.61 rows=575154 width=20) (actual time=479.370..2858.942 rows=574876 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-07-01'::date) AND (o_orderdate < '1996-10-01'::date))
                     Buffers: shared hit=228444 read=3106
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12321.52 rows=575154 width=0) (actual time=360.146..360.146 rows=578936 loops=1)
                           Index Cond: ((o_orderdate >= '1996-07-01'::date) AND (o_orderdate < '1996-10-01'::date))
                           Buffers: shared read=1646
               ->  Hash  (cost=995748.63..995748.63 rows=1346362 width=4) (actual time=74701.611..74701.611 rows=13767175 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484003kB
                     Buffers: shared hit=905978 read=376858 written=2964
                     ->  HashAggregate  (cost=982285.01..995748.63 rows=1346362 width=4) (actual time=61053.302..70835.670 rows=13767175 loops=1)
                           Buffers: shared hit=905978 read=376858 written=2964
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..931897.44 rows=20155027 width=4) (actual time=0.227..28321.578 rows=37965693 loops=1)
                                 Buffers: shared hit=905978 read=376858 written=2964
 Total runtime: 87070.950 ms
(23 rows)

COMMIT;
COMMIT