BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-08-01'
	and o_orderdate < cast(date '1994-08-01' + 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=1142188.23..1142188.24 rows=1 width=16) (actual time=8615.684..8615.684 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2717174 read=335707 dirtied=478 written=4823
   ->  HashAggregate  (cost=1142188.21..1142188.22 rows=1 width=16) (actual time=8615.619..8615.621 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2717169 read=335707 dirtied=478 written=4823
         ->  Nested Loop Semi Join  (cost=12017.74..1141408.61 rows=155920 width=16) (actual time=295.432..8359.737 rows=525903 loops=1)
               Buffers: shared hit=2717169 read=335707 dirtied=478 written=4823
               ->  Bitmap Heap Scan on orders  (cost=12017.18..274551.63 rows=567097 width=20) (actual time=295.282..2562.807 rows=573742 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-08-01'::date) AND (o_orderdate < '1994-11-01'::date))
                     Heap Blocks: exact=228827
                     Buffers: shared hit=117434 read=112962 dirtied=225 written=2094
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11875.41 rows=567097 width=0) (actual time=218.067..218.067 rows=574883 loops=1)
                           Index Cond: ((o_orderdate >= '1994-08-01'::date) AND (o_orderdate < '1994-11-01'::date))
                           Buffers: shared hit=94 read=1475 written=153
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.58 rows=5 width=4) (actual time=0.009..0.009 rows=1 loops=573742)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2599735 read=222745 dirtied=253 written=2729
 Planning time: 2.474 ms
 Execution time: 8618.185 ms
(21 rows)

COMMIT;
COMMIT