BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-12-01'
	and o_orderdate < cast(date '1993-12-01' + 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=1136374.48..1136374.48 rows=1 width=16) (actual time=11072.760..11072.762 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2631016 read=357690 written=143
   ->  HashAggregate  (cost=1136374.46..1136374.47 rows=1 width=16) (actual time=11072.682..11072.683 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2631011 read=357690 written=143
         ->  Nested Loop Semi Join  (cost=12074.52..1135620.38 rows=150816 width=16) (actual time=889.118..10804.426 rows=514249 loops=1)
               Buffers: shared hit=2631011 read=357690 written=143
               ->  Bitmap Heap Scan on orders  (cost=12073.95..275150.66 rows=569514 width=20) (actual time=888.950..3143.166 rows=560913 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-12-01'::date) AND (o_orderdate < '1994-03-01'::date))
                     Heap Blocks: exact=227802
                     Buffers: shared hit=168022 read=61316 written=31
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11931.57 rows=569514 width=0) (actual time=782.170..782.170 rows=563212 loops=1)
                           Index Cond: ((o_orderdate >= '1993-12-01'::date) AND (o_orderdate < '1994-03-01'::date))
                           Buffers: shared read=1536
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.57 rows=5 width=4) (actual time=0.013..0.013 rows=1 loops=560913)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2462989 read=296374 written=112
 Planning time: 2.899 ms
 Execution time: 11075.210 ms
(21 rows)

COMMIT;
COMMIT