BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-04-01'
	and o_orderdate < cast(date '1993-04-01' + 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=1144437.78..1144437.79 rows=1 width=16) (actual time=11806.419..11806.420 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2730282 read=295643
   ->  HashAggregate  (cost=1144437.76..1144437.77 rows=1 width=16) (actual time=11806.356..11806.358 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2730277 read=295643
         ->  Nested Loop Semi Join  (cost=12084.17..1143660.50 rows=155453 width=16) (actual time=583.448..11503.056 rows=521384 loops=1)
               Buffers: shared hit=2730277 read=295643
               ->  Bitmap Heap Scan on orders  (cost=12083.61..274921.45 rows=570456 width=20) (actual time=583.334..3067.226 rows=568302 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-04-01'::date) AND (o_orderdate < '1993-07-01'::date))
                     Heap Blocks: exact=228157
                     Buffers: shared hit=167907 read=61804
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11941.00 rows=570456 width=0) (actual time=433.630..433.630 rows=569990 loops=1)
                           Index Cond: ((o_orderdate >= '1993-04-01'::date) AND (o_orderdate < '1993-07-01'::date))
                           Buffers: shared read=1554
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.57 rows=5 width=4) (actual time=0.014..0.014 rows=1 loops=568302)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2562370 read=233839
 Planning time: 3.292 ms
 Execution time: 11810.194 ms
(21 rows)

COMMIT;
COMMIT