BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-01-01'
	and o_orderdate < cast(date '1993-01-01' + 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=1292374.92..1292374.93 rows=1 width=16) (actual time=141207.039..141207.040 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1211602 read=307568 dirtied=1298 written=17
   ->  HashAggregate  (cost=1292374.90..1292374.91 rows=1 width=16) (actual time=141206.850..141206.852 rows=5 loops=1)
         Buffers: shared hit=1211597 read=307568 dirtied=1298 written=17
         ->  Hash Join  (cost=1022859.87..1291608.88 rows=153204 width=16) (actual time=121833.806..140812.462 rows=516018 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1211597 read=307568 dirtied=1298 written=17
               ->  Bitmap Heap Scan on orders  (cost=12083.23..275365.81 rows=566372 width=20) (actual time=738.811..10076.283 rows=562742 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-01-01'::date) AND (o_orderdate < '1993-04-01'::date))
                     Buffers: shared hit=228121 read=1628 written=5
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11941.64 rows=566372 width=0) (actual time=614.270..614.270 rows=565471 loops=1)
                           Index Cond: ((o_orderdate >= '1993-01-01'::date) AND (o_orderdate < '1993-04-01'::date))
                           Buffers: shared read=1564
               ->  Hash  (cost=993769.05..993769.05 rows=1360607 width=4) (actual time=121092.854..121092.854 rows=13767164 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484002kB
                     Buffers: shared hit=983476 read=305940 dirtied=1298 written=12
                     ->  HashAggregate  (cost=980162.98..993769.05 rows=1360607 width=4) (actual time=106672.137..117018.420 rows=13767164 loops=1)
                           Buffers: shared hit=983476 read=305940 dirtied=1298 written=12
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..929875.79 rows=20114876 width=4) (actual time=1.641..65999.856 rows=37966560 loops=1)
                                 Buffers: shared hit=983476 read=305940 dirtied=1298 written=12
 Total runtime: 141496.041 ms
(23 rows)

COMMIT;
COMMIT