BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-07-01'
	and o_orderdate < cast(date '1994-07-01' + 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=1302202.88..1302202.88 rows=1 width=16) (actual time=81088.638..81088.639 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=738093 read=779689 dirtied=599 written=196
   ->  HashAggregate  (cost=1302202.86..1302202.87 rows=1 width=16) (actual time=81088.487..81088.488 rows=5 loops=1)
         Buffers: shared hit=738088 read=779689 dirtied=599 written=196
         ->  Hash Join  (cost=1030182.89..1301403.38 rows=159896 width=16) (actual time=70941.028..80875.079 rows=525764 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=738088 read=779689 dirtied=599 written=196
               ->  Bitmap Heap Scan on orders  (cost=12919.12..278401.75 rows=594842 width=20) (actual time=476.479..2334.937 rows=573387 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-07-01'::date) AND (o_orderdate < '1994-10-01'::date))
                     Buffers: shared hit=166415 read=66521
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12770.41 rows=594842 width=0) (actual time=364.455..364.455 rows=580806 loops=1)
                           Index Cond: ((o_orderdate >= '1994-07-01'::date) AND (o_orderdate < '1994-10-01'::date))
                           Buffers: shared read=1663
               ->  Hash  (cost=1000245.19..1000245.19 rows=1361486 width=4) (actual time=70463.007..70463.007 rows=13753463 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483521kB
                     Buffers: shared hit=571673 read=713168 dirtied=599 written=196
                     ->  HashAggregate  (cost=986630.33..1000245.19 rows=1361486 width=4) (actual time=56075.045..65145.826 rows=13753463 loops=1)
                           Buffers: shared hit=571673 read=713168 dirtied=599 written=196
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..935992.73 rows=20255041 width=4) (actual time=0.212..24389.948 rows=37928434 loops=1)
                                 Buffers: shared hit=571673 read=713168 dirtied=599 written=196
 Total runtime: 81378.428 ms
(23 rows)

COMMIT;
COMMIT