BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1995-01-01'
	and o_orderdate < cast(date '1995-01-01' + 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=1290228.86..1290228.87 rows=1 width=16) (actual time=106445.474..106445.475 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1069733 read=438814 written=2116
   ->  HashAggregate  (cost=1290228.84..1290228.85 rows=1 width=16) (actual time=106445.281..106445.282 rows=5 loops=1)
         Buffers: shared hit=1069728 read=438814 written=2116
         ->  Hash Join  (cost=1021084.11..1289475.71 rows=150627 width=16) (actual time=91438.758..106085.333 rows=515498 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1069728 read=438814 written=2116
               ->  Bitmap Heap Scan on orders  (cost=11921.85..274890.91 rows=562337 width=20) (actual time=554.918..3812.112 rows=562050 loops=1)
                     Recheck Cond: ((o_orderdate >= '1995-01-01'::date) AND (o_orderdate < '1995-04-01'::date))
                     Buffers: shared hit=195871 read=33695
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11781.27 rows=562337 width=0) (actual time=424.814..424.814 rows=564369 loops=1)
                           Index Cond: ((o_orderdate >= '1995-01-01'::date) AND (o_orderdate < '1995-04-01'::date))
                           Buffers: shared read=1542
               ->  Hash  (cost=992337.41..992337.41 rows=1345988 width=4) (actual time=90882.099..90882.099 rows=13767198 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484004kB
                     Buffers: shared hit=873857 read=405119 written=2116
                     ->  HashAggregate  (cost=978877.53..992337.41 rows=1345988 width=4) (actual time=77154.216..87014.945 rows=13767198 loops=1)
                           Buffers: shared hit=873857 read=405119 written=2116
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..928639.52 rows=20095204 width=4) (actual time=0.176..38122.898 rows=37966982 loops=1)
                                 Buffers: shared hit=873857 read=405119 written=2116
 Total runtime: 106848.869 ms
(23 rows)

COMMIT;
COMMIT