BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-01-01'
	and o_orderdate < cast(date '1996-01-01' + 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=1142695.83..1142695.83 rows=1 width=16) (actual time=8076.037..8076.037 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2603749 read=416749
   ->  HashAggregate  (cost=1142695.81..1142695.82 rows=1 width=16) (actual time=8075.974..8075.977 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2603744 read=416749
         ->  Nested Loop Semi Join  (cost=12092.90..1141925.32 rows=154097 width=16) (actual time=227.787..7820.413 rows=520036 loops=1)
               Buffers: shared hit=2603744 read=416749
               ->  Bitmap Heap Scan on orders  (cost=12092.34..275184.24 rows=570527 width=20) (actual time=227.638..1785.227 rows=567184 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-01-01'::date) AND (o_orderdate < '1996-04-01'::date))
                     Heap Blocks: exact=228606
                     Buffers: shared hit=181666 read=48497
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11949.70 rows=570527 width=0) (actual time=161.792..161.792 rows=569929 loops=1)
                           Index Cond: ((o_orderdate >= '1996-01-01'::date) AND (o_orderdate < '1996-04-01'::date))
                           Buffers: shared read=1557
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.57 rows=5 width=4) (actual time=0.010..0.010 rows=1 loops=567184)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2422078 read=368252
 Planning time: 2.436 ms
 Execution time: 8077.537 ms
(21 rows)

COMMIT;
COMMIT