BEGIN;
BEGIN
create or replace view revenue1 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1994-01-01'
		and l_shipdate < date'1994-01-01' + 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,
	revenue1
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue1
	)
order by
	s_suppkey;
                                                                                      QUERY PLAN                                                                                       
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2368187.19..2373284.01 rows=3708 width=79) (actual time=21559.594..21559.600 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue1.supplier_no)
   Buffers: shared hit=850750 read=472303 dirtied=130 written=6415
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1175585.41..1175585.42 rows=1 width=8) (actual time=10526.600..10526.600 rows=1 loops=1)
           Buffers: shared hit=403092 read=258128 written=93
           ->  HashAggregate  (cost=1175501.98..1175539.06 rows=3708 width=12) (actual time=10484.512..10516.451 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=403092 read=258128 written=93
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47367.45..1153106.97 rows=2239501 width=12) (actual time=2481.298..8644.303 rows=2242133 loops=1)
                       Recheck Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=655090
                       Buffers: shared hit=403092 read=258128 written=93
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46807.58 rows=2239501 width=0) (actual time=2028.927..2028.927 rows=2257759 loops=1)
                             Index Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                             Buffers: shared read=6130 written=2
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.029..9.387 rows=21986 loops=1)
         Buffers: shared hit=613
   ->  Sort  (cost=1192601.48..1192610.75 rows=3708 width=12) (actual time=21548.036..21548.039 rows=1 loops=1)
         Sort Key: revenue1.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=850137 read=472303 dirtied=130 written=6415
         ->  Subquery Scan on revenue1  (cost=1192298.23..1192381.66 rows=3708 width=12) (actual time=21521.047..21548.000 rows=1 loops=1)
               Buffers: shared hit=850137 read=472303 dirtied=130 written=6415
               ->  HashAggregate  (cost=1192298.23..1192344.58 rows=3708 width=12) (actual time=21521.045..21547.996 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=850137 read=472303 dirtied=130 written=6415
                     ->  Bitmap Heap Scan on lineitem  (cost=47367.45..1153106.97 rows=2239501 width=12) (actual time=1261.420..7904.074 rows=2242133 loops=1)
                           Recheck Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=655090
                           Buffers: shared hit=447045 read=214175 dirtied=130 written=6322
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..46807.58 rows=2239501 width=0) (actual time=989.823..989.823 rows=2256498 loops=1)
                                 Index Cond: ((l_shipdate >= '1994-01-01'::date) AND (l_shipdate < '1994-04-01 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=568 read=5562 written=359
 Planning time: 2.685 ms
 Execution time: 21570.605 ms
(38 rows)

drop view revenue1;
DROP VIEW
COMMIT;
COMMIT