BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-06-01'
	and o_orderdate < cast(date '1994-06-01' + 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=1285914.42..1285914.43 rows=1 width=16) (actual time=59406.190..59406.191 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=341562 read=1153000
   ->  HashAggregate  (cost=1285914.40..1285914.41 rows=1 width=16) (actual time=59406.029..59406.031 rows=5 loops=1)
         Buffers: shared hit=341557 read=1153000
         ->  Hash Join  (cost=1017455.75..1285141.66 rows=154549 width=16) (actual time=51191.953..59232.524 rows=527086 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=341557 read=1153000
               ->  Bitmap Heap Scan on orders  (cost=12192.41..274334.67 rows=574684 width=20) (actual time=246.775..1560.847 rows=574844 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-06-01'::date) AND (o_orderdate < '1994-09-01'::date))
                     Buffers: shared hit=201433 read=28437
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12048.74 rows=574684 width=0) (actual time=168.441..168.441 rows=574844 loops=1)
                           Index Cond: ((o_orderdate >= '1994-06-01'::date) AND (o_orderdate < '1994-09-01'::date))
                           Buffers: shared read=1573
               ->  Hash  (cost=988438.50..988438.50 rows=1345988 width=4) (actual time=50942.910..50942.910 rows=13767196 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484003kB
                     Buffers: shared hit=140124 read=1124563
                     ->  HashAggregate  (cost=974978.62..988438.50 rows=1345988 width=4) (actual time=37838.412..47744.276 rows=13767196 loops=1)
                           Buffers: shared hit=140124 read=1124563
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..924940.72 rows=20015160 width=4) (actual time=0.148..17658.846 rows=37967116 loops=1)
                                 Buffers: shared hit=140124 read=1124563
 Total runtime: 59953.687 ms
(23 rows)

COMMIT;
COMMIT