BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-10-01'
	and o_orderdate < cast(date '1993-10-01' + 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=1296361.43..1296361.44 rows=1 width=16) (actual time=92781.647..92781.647 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=852019 read=668407 dirtied=299 written=4997
   ->  HashAggregate  (cost=1296361.41..1296361.42 rows=1 width=16) (actual time=92781.490..92781.494 rows=5 loops=1)
         Buffers: shared hit=852014 read=668407 dirtied=299 written=4997
         ->  Hash Join  (cost=1025830.47..1295586.33 rows=155017 width=16) (actual time=76582.513..92393.473 rows=525486 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=852014 read=668407 dirtied=299 written=4997
               ->  Bitmap Heap Scan on orders  (cost=12518.79..276713.83 rows=576469 width=20) (actual time=505.311..4909.780 rows=573311 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-10-01'::date) AND (o_orderdate < '1994-01-01'::date))
                     Buffers: shared hit=59261 read=172472 written=119
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12374.67 rows=576469 width=0) (actual time=361.099..361.099 rows=578377 loops=1)
                           Index Cond: ((o_orderdate >= '1993-10-01'::date) AND (o_orderdate < '1994-01-01'::date))
                           Buffers: shared hit=2 read=1653
               ->  Hash  (cost=996353.68..996353.68 rows=1356640 width=4) (actual time=76075.103..76075.103 rows=13753384 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 483518kB
                     Buffers: shared hit=792753 read=495935 dirtied=299 written=4878
                     ->  HashAggregate  (cost=982787.28..996353.68 rows=1356640 width=4) (actual time=62060.933..71776.095 rows=13753384 loops=1)
                           Buffers: shared hit=792753 read=495935 dirtied=299 written=4878
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..932350.56 rows=20174690 width=4) (actual time=0.162..28977.823 rows=37927367 loops=1)
                                 Buffers: shared hit=792753 read=495935 dirtied=299 written=4878
 Total runtime: 93082.341 ms
(23 rows)

COMMIT;
COMMIT