BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-01-01'
	and o_orderdate < cast(date '1994-01-01' + 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=1137159.70..1137159.70 rows=1 width=16) (actual time=9098.354..9098.355 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2610183 read=379427 written=1237
   ->  HashAggregate  (cost=1137159.68..1137159.69 rows=1 width=16) (actual time=9098.288..9098.288 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2610178 read=379427 written=1237
         ->  Nested Loop Semi Join  (cost=12249.50..1136403.83 rows=151170 width=16) (actual time=291.622..8823.366 rows=514282 loops=1)
               Buffers: shared hit=2610178 read=379427 written=1237
               ->  Bitmap Heap Scan on orders  (cost=12248.93..277268.20 rows=563951 width=20) (actual time=291.507..1588.396 rows=560644 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-01-01'::date) AND (o_orderdate < '1994-04-01'::date))
                     Heap Blocks: exact=229657
                     Buffers: shared hit=225952 read=5330 written=9
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12107.94 rows=563951 width=0) (actual time=212.706..212.706 rows=567432 loops=1)
                           Index Cond: ((o_orderdate >= '1994-01-01'::date) AND (o_orderdate < '1994-04-01'::date))
                           Buffers: shared hit=93 read=1532 written=6
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.60 rows=5 width=4) (actual time=0.012..0.012 rows=1 loops=560644)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2384226 read=374097 written=1228
 Planning time: 2.582 ms
 Execution time: 9100.866 ms
(21 rows)

COMMIT;
COMMIT