BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-12-01'
	and o_orderdate < cast(date '1993-12-01' + 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=1127377.01..1127377.01 rows=1 width=16) (actual time=11260.397..11260.398 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2589670 read=399036 dirtied=221 written=160
   ->  HashAggregate  (cost=1127376.99..1127377.00 rows=1 width=16) (actual time=11260.322..11260.322 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2589665 read=399036 dirtied=221 written=160
         ->  Nested Loop Semi Join  (cost=11795.81..1126619.66 rows=151465 width=16) (actual time=397.846..10963.941 rows=514249 loops=1)
               Buffers: shared hit=2589665 read=399036 dirtied=221 written=160
               ->  Bitmap Heap Scan on orders  (cost=11795.25..274674.83 rows=556372 width=20) (actual time=397.694..2847.456 rows=560913 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-12-01'::date) AND (o_orderdate < '1994-03-01'::date))
                     Heap Blocks: exact=227802
                     Buffers: shared hit=144584 read=84754 dirtied=221 written=60
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11656.16 rows=556372 width=0) (actual time=283.802..283.802 rows=563212 loops=1)
                           Index Cond: ((o_orderdate >= '1993-12-01'::date) AND (o_orderdate < '1994-03-01'::date))
                           Buffers: shared hit=70 read=1466 written=2
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.61 rows=5 width=4) (actual time=0.014..0.014 rows=1 loops=560913)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2445081 read=314282 written=100
 Planning time: 3.046 ms
 Execution time: 11262.625 ms
(21 rows)

COMMIT;
COMMIT