BEGIN;
BEGIN
create or replace view revenue7 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1993-01-01'
		and l_shipdate < date'1993-01-01' + 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,
	revenue7
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue7
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2389987.81..2395085.27 rows=3733 width=79) (actual time=33259.015..33259.019 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue7.supplier_no)
   Buffers: shared hit=575547 read=762623 dirtied=180 written=1131
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1186344.47..1186344.48 rows=1 width=8) (actual time=15958.059..15958.059 rows=1 loops=1)
           Buffers: shared hit=221192 read=447156 written=101
           ->  HashAggregate  (cost=1186260.48..1186297.81 rows=3733 width=12) (actual time=15903.410..15947.262 rows=100000 loops=1)
                 Buffers: shared hit=221192 read=447156 written=101
                 ->  Bitmap Heap Scan on lineitem  (cost=47953.90..1163490.65 rows=2276983 width=12) (actual time=1860.873..12102.814 rows=2249483 loops=1)
                       Recheck Cond: ((l_shipdate >= '1993-01-01'::date) AND (l_shipdate < '1993-04-01 00:00:00'::timestamp without time zone))
                       Buffers: shared hit=221192 read=447156 written=101
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47384.66 rows=2276983 width=0) (actual time=1446.489..1446.489 rows=2280596 loops=1)
                             Index Cond: ((l_shipdate >= '1993-01-01'::date) AND (l_shipdate < '1993-04-01 00:00:00'::timestamp without time zone))
                             Buffers: shared hit=2 read=6142
   ->  Index Scan using pk_supplier on supplier  (cost=0.00..4791.46 rows=100000 width=71) (actual time=0.061..23.419 rows=53897 loops=1)
         Buffers: shared hit=1472 read=1
   ->  Sort  (cost=1203643.33..1203652.66 rows=3733 width=12) (actual time=33230.276..33230.278 rows=1 loops=1)
         Sort Key: revenue7.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=574075 read=762622 dirtied=180 written=1131
         ->  Subquery Scan on revenue7  (cost=1203337.85..1203421.84 rows=3733 width=12) (actual time=33200.582..33230.240 rows=1 loops=1)
               Buffers: shared hit=574075 read=762622 dirtied=180 written=1131
               ->  HashAggregate  (cost=1203337.85..1203384.51 rows=3733 width=12) (actual time=33200.580..33230.237 rows=1 loops=1)
                     Filter: (sum((public.lineitem.l_extendedprice * (1::double precision - public.lineitem.l_discount))) = $0)
                     Rows Removed by Filter: 99999
                     Buffers: shared hit=574075 read=762622 dirtied=180 written=1131
                     ->  Bitmap Heap Scan on lineitem  (cost=47953.90..1163490.65 rows=2276983 width=12) (actual time=2443.974..13420.327 rows=2249483 loops=1)
                           Recheck Cond: ((l_shipdate >= '1993-01-01'::date) AND (l_shipdate < '1993-04-01 00:00:00'::timestamp without time zone))
                           Buffers: shared hit=352883 read=315466 dirtied=180 written=1030
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47384.66 rows=2276983 width=0) (actual time=2055.056..2055.056 rows=2280596 loops=1)
                                 Index Cond: ((l_shipdate >= '1993-01-01'::date) AND (l_shipdate < '1993-04-01 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=6 read=6139
 Total runtime: 33276.257 ms
(33 rows)

drop view revenue7;
DROP VIEW
COMMIT;
COMMIT