BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-04-01'
	and o_orderdate < cast(date '1994-04-01' + 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=1293802.41..1293802.41 rows=1 width=16) (actual time=92551.600..92551.601 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=759219 read=757579 dirtied=590 written=9928
   ->  HashAggregate  (cost=1293802.39..1293802.40 rows=1 width=16) (actual time=92551.419..92551.421 rows=5 loops=1)
         Buffers: shared hit=759214 read=757579 dirtied=590 written=9928
         ->  Hash Join  (cost=1023913.76..1293038.24 rows=152830 width=16) (actual time=81199.489..92279.467 rows=521636 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=759214 read=757579 dirtied=590 written=9928
               ->  Bitmap Heap Scan on orders  (cost=12308.23..275922.31 rows=571539 width=20) (actual time=725.123..2389.665 rows=568685 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-04-01'::date) AND (o_orderdate < '1994-07-01'::date))
                     Buffers: shared hit=229060 read=1609
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12165.34 rows=571539 width=0) (actual time=612.328..612.328 rows=572105 loops=1)
                           Index Cond: ((o_orderdate >= '1994-04-01'::date) AND (o_orderdate < '1994-07-01'::date))
                           Buffers: shared read=1609
               ->  Hash  (cost=994776.00..994776.00 rows=1346362 width=4) (actual time=80472.703..80472.703 rows=13767199 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484004kB
                     Buffers: shared hit=530154 read=755970 dirtied=590 written=9928
                     ->  HashAggregate  (cost=981312.38..994776.00 rows=1346362 width=4) (actual time=67428.379..77200.011 rows=13767199 loops=1)
                           Buffers: shared hit=530154 read=755970 dirtied=590 written=9928
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..930974.64 rows=20135096 width=4) (actual time=0.223..33190.846 rows=37966100 loops=1)
                                 Buffers: shared hit=530154 read=755970 dirtied=590 written=9928
 Total runtime: 92830.345 ms
(23 rows)

COMMIT;
COMMIT