BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-03-01'
	and o_orderdate < cast(date '1997-03-01' + 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=1296521.84..1296521.85 rows=1 width=16) (actual time=92278.234..92278.235 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=576998 read=943365 dirtied=1368 written=61439
   ->  HashAggregate  (cost=1296521.82..1296521.83 rows=1 width=16) (actual time=92278.105..92278.107 rows=5 loops=1)
         Buffers: shared hit=576993 read=943365 dirtied=1368 written=61439
         ->  Hash Join  (cost=1026033.96..1295754.32 rows=153501 width=16) (actual time=76290.426..91874.144 rows=525801 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=576993 read=943365 dirtied=1368 written=61439
               ->  Bitmap Heap Scan on orders  (cost=12489.65..276665.46 rows=575187 width=20) (actual time=301.225..5215.814 rows=573717 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-03-01'::date) AND (o_orderdate < '1997-06-01'::date))
                     Buffers: shared hit=7066 read=224604 written=52
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12345.85 rows=575187 width=0) (actual time=222.286..222.286 rows=578827 loops=1)
                           Index Cond: ((o_orderdate >= '1997-03-01'::date) AND (o_orderdate < '1997-06-01'::date))
                           Buffers: shared read=1657
               ->  Hash  (cost=996714.78..996714.78 rows=1346362 width=4) (actual time=75987.258..75987.258 rows=13753384 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483518kB
                     Buffers: shared hit=569927 read=718761 dirtied=1368 written=61387
                     ->  HashAggregate  (cost=983251.16..996714.78 rows=1346362 width=4) (actual time=63247.637..72216.192 rows=13753384 loops=1)
                           Buffers: shared hit=569927 read=718761 dirtied=1368 written=61387
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..932813.95 rows=20174884 width=4) (actual time=0.171..31801.122 rows=37927367 loops=1)
                                 Buffers: shared hit=569927 read=718761 dirtied=1368 written=61387
 Total runtime: 92527.436 ms
(23 rows)

COMMIT;
COMMIT