BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1997-04-01'
	and o_orderdate < cast(date '1997-04-01' + 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=1286179.29..1286179.30 rows=1 width=16) (actual time=109164.158..109164.158 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=1069527 read=429404 dirtied=310 written=4327
   ->  HashAggregate  (cost=1286179.27..1286179.28 rows=1 width=16) (actual time=109164.012..109164.014 rows=5 loops=1)
         Buffers: shared hit=1069522 read=429404 dirtied=310 written=4327
         ->  Hash Join  (cost=1018010.41..1285421.52 rows=151551 width=16) (actual time=95084.440..108835.096 rows=520354 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=1069522 read=429404 dirtied=310 written=4327
               ->  Bitmap Heap Scan on orders  (cost=11954.12..273929.13 rows=563534 width=20) (actual time=514.666..3772.064 rows=567721 loops=1)
                     Recheck Cond: ((o_orderdate >= '1997-04-01'::date) AND (o_orderdate < '1997-07-01'::date))
                     Buffers: shared hit=214844 read=14269 dirtied=11 written=252
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11813.24 rows=563534 width=0) (actual time=337.799..337.799 rows=568304 loops=1)
                           Index Cond: ((o_orderdate >= '1997-04-01'::date) AND (o_orderdate < '1997-07-01'::date))
                           Buffers: shared read=1555 written=37
               ->  Hash  (cost=989231.44..989231.44 rows=1345988 width=4) (actual time=94567.779..94567.779 rows=13753423 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483519kB
                     Buffers: shared hit=854678 read=415135 dirtied=299 written=4075
                     ->  HashAggregate  (cost=975771.56..989231.44 rows=1345988 width=4) (actual time=70925.470..82460.515 rows=13753423 loops=1)
                           Buffers: shared hit=854678 read=415135 dirtied=299 written=4075
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..925692.80 rows=20031507 width=4) (actual time=0.237..29493.051 rows=37928797 loops=1)
                                 Buffers: shared hit=854678 read=415135 dirtied=299 written=4075
 Total runtime: 109697.642 ms
(23 rows)

COMMIT;
COMMIT