BEGIN;
BEGIN
create or replace view revenue8 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1994-04-01'
		and l_shipdate < date'1994-04-01' + interval '90 days'
	group by
		l_suppkey;
CREATE VIEW
EXPLAIN (ANALYZE, BUFFERS)
select
	s_suppkey,
	s_name,
	s_address,
	s_phone,
	total_revenue
from
	supplier,
	revenue8
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue8
	)
order by
	s_suppkey;
                                                                                      QUERY PLAN                                                                                       
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2361630.87..2366727.95 rows=3725 width=79) (actual time=17353.682..17353.685 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue8.supplier_no)
   Buffers: shared hit=629936 read=690823 dirtied=1169 written=464
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1172293.23..1172293.24 rows=1 width=8) (actual time=8104.549..8104.549 rows=1 loops=1)
           Buffers: shared hit=328689 read=330953 dirtied=542 written=384
           ->  HashAggregate  (cost=1172209.42..1172246.67 rows=3725 width=12) (actual time=8066.231..8094.750 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=328689 read=330953 dirtied=542 written=384
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47524.22..1149778.54 rows=2243088 width=12) (actual time=1080.333..6417.626 rows=2245569 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=653508
                       Buffers: shared hit=328689 read=330953 dirtied=542 written=384
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46963.45 rows=2243088 width=0) (actual time=807.827..807.827 rows=2250325 loops=1)
                             Index Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6134
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.040..21.507 rows=53995 loops=1)
         Buffers: shared hit=1475
   ->  Sort  (cost=1189337.34..1189346.65 rows=3725 width=12) (actual time=17327.110..17327.111 rows=1 loops=1)
         Sort Key: revenue8.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=628461 read=690823 dirtied=1169 written=464
         ->  Subquery Scan on revenue8  (cost=1189032.58..1189116.39 rows=3725 width=12) (actual time=17320.227..17327.082 rows=1 loops=1)
               Buffers: shared hit=628461 read=690823 dirtied=1169 written=464
               ->  HashAggregate  (cost=1189032.58..1189079.14 rows=3725 width=12) (actual time=17320.226..17327.080 rows=1 loops=1)
                     Group Key: lineitem.l_suppkey
                     Filter: (sum((lineitem.l_extendedprice * (1::double precision - lineitem.l_discount))) = $0)
                     Rows Removed by Filter: 99999
                     Buffers: shared hit=628461 read=690823 dirtied=1169 written=464
                     ->  Bitmap Heap Scan on lineitem  (cost=47524.22..1149778.54 rows=2243088 width=12) (actual time=1047.262..7445.965 rows=2245569 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=653508
                           Buffers: shared hit=299772 read=359870 dirtied=627 written=80
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46963.45 rows=2243088 width=0) (actual time=806.553..806.553 rows=2250325 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared read=6134
 Planning time: 2.200 ms
 Execution time: 17366.152 ms
(38 rows)

drop view revenue8;
DROP VIEW
COMMIT;
COMMIT