BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-08-01'
	and o_orderdate < cast(date '1996-08-01' + 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=1291180.14..1291180.14 rows=1 width=16) (actual time=113264.776..113264.777 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=743526 read=766244 written=12533
   ->  HashAggregate  (cost=1291180.12..1291180.13 rows=1 width=16) (actual time=113264.609..113264.612 rows=5 loops=1)
         Buffers: shared hit=743521 read=766244 written=12533
         ->  Hash Join  (cost=1021510.99..1290399.95 rows=156034 width=16) (actual time=96899.933..112841.386 rows=526504 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=743521 read=766244 written=12533
               ->  Bitmap Heap Scan on orders  (cost=12348.73..275620.53 rows=582520 width=20) (actual time=670.584..5225.934 rows=573887 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-08-01'::date) AND (o_orderdate < '1996-11-01'::date))
                     Buffers: shared hit=157346 read=73443
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12203.10 rows=582520 width=0) (actual time=517.815..517.815 rows=576216 loops=1)
                           Index Cond: ((o_orderdate >= '1996-08-01'::date) AND (o_orderdate < '1996-11-01'::date))
                           Buffers: shared read=1573
               ->  Hash  (cost=992337.41..992337.41 rows=1345988 width=4) (actual time=96227.646..96227.646 rows=13767198 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484004kB
                     Buffers: shared hit=586175 read=692801 written=12533
                     ->  HashAggregate  (cost=978877.53..992337.41 rows=1345988 width=4) (actual time=81814.729..91960.438 rows=13767198 loops=1)
                           Buffers: shared hit=586175 read=692801 written=12533
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..928639.52 rows=20095204 width=4) (actual time=0.347..42388.233 rows=37966982 loops=1)
                                 Buffers: shared hit=586175 read=692801 written=12533
 Total runtime: 113720.919 ms
(23 rows)

COMMIT;
COMMIT