BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1996-07-01'
	and o_orderdate < cast(date '1996-07-01' + 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=1152222.07..1152222.08 rows=1 width=16) (actual time=11617.455..11617.457 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2609030 read=449383 written=14516
   ->  HashAggregate  (cost=1152222.05..1152222.06 rows=1 width=16) (actual time=11617.380..11617.383 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2609025 read=449383 written=14516
         ->  Nested Loop Semi Join  (cost=12612.86..1151458.52 rows=152706 width=16) (actual time=331.962..11332.748 rows=526851 loops=1)
               Buffers: shared hit=2609025 read=449383 written=14516
               ->  Bitmap Heap Scan on orders  (cost=12612.29..277629.33 rows=580669 width=20) (actual time=331.795..2706.754 rows=574386 loops=1)
                     Recheck Cond: ((o_orderdate >= '1996-07-01'::date) AND (o_orderdate < '1996-10-01'::date))
                     Heap Blocks: exact=230818
                     Buffers: shared hit=147585 read=84897 written=3029
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12467.12 rows=580669 width=0) (actual time=231.281..231.281 rows=581310 loops=1)
                           Index Cond: ((o_orderdate >= '1996-07-01'::date) AND (o_orderdate < '1996-10-01'::date))
                           Buffers: shared read=1664 written=145
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.56 rows=5 width=4) (actual time=0.014..0.014 rows=1 loops=574386)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2461440 read=364486 written=11487
 Planning time: 2.691 ms
 Execution time: 11621.206 ms
(21 rows)

COMMIT;
COMMIT