BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-01-01'
	and o_orderdate < cast(date '1996-01-01' + 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=1292295.24..1292295.25 rows=1 width=16) (actual time=103243.789..103243.789 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1055325 read=455296 written=1944
   ->  HashAggregate  (cost=1292295.22..1292295.23 rows=1 width=16) (actual time=103243.601..103243.602 rows=5 loops=1)
         Buffers: shared hit=1055320 read=455296 written=1944
         ->  Hash Join  (cost=1022621.92..1291523.03 rows=154438 width=16) (actual time=91018.823..102922.806 rows=520521 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1055320 read=455296 written=1944
               ->  Bitmap Heap Scan on orders  (cost=12215.10..275591.15 rows=572603 width=20) (actual time=708.691..3055.912 rows=567718 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-01-01'::date) AND (o_orderdate < '1996-04-01'::date))
                     Buffers: shared hit=228840 read=1571
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12071.95 rows=572603 width=0) (actual time=497.055..497.055 rows=570463 loops=1)
                           Index Cond: ((o_orderdate >= '1996-01-01'::date) AND (o_orderdate < '1996-04-01'::date))
                           Buffers: shared hit=2 read=1571
               ->  Hash  (cost=993448.81..993448.81 rows=1356641 width=4) (actual time=90308.498..90308.498 rows=13767164 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484002kB
                     Buffers: shared hit=826480 read=453725 written=1944
                     ->  HashAggregate  (cost=979882.40..993448.81 rows=1356641 width=4) (actual time=72470.443..83792.997 rows=13767164 loops=1)
                           Buffers: shared hit=826480 read=453725 written=1944
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..929594.78 rows=20115047 width=4) (actual time=0.331..31196.272 rows=37966560 loops=1)
                                 Buffers: shared hit=826480 read=453725 written=1944
 Total runtime: 103637.813 ms
(23 rows)

COMMIT;
COMMIT