BEGIN;
BEGIN
create or replace view revenue12 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1995-07-01'
		and l_shipdate < date'1995-07-01' + 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,
	revenue12
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue12
	)
order by
	s_suppkey;
                                                                                      QUERY PLAN                                                                                       
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2379641.33..2384736.93 rows=3626 width=79) (actual time=15682.655..15682.659 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue12.supplier_no)
   Buffers: shared hit=828750 read=505864 dirtied=626 written=20038
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1181438.50..1181438.51 rows=1 width=8) (actual time=7108.384..7108.384 rows=1 loops=1)
           Buffers: shared hit=365606 read=301141 written=1591
           ->  HashAggregate  (cost=1181356.92..1181393.18 rows=3626 width=12) (actual time=7072.161..7098.804 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=365606 read=301141 written=1591
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=46502.42..1159290.72 rows=2206620 width=12) (actual time=1010.306..5495.992 rows=2245066 loops=1)
                       Recheck Cond: ((l_shipdate >= '1995-07-01'::date) AND (l_shipdate < '1995-09-29 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=660608
                       Buffers: shared hit=365606 read=301141 written=1591
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..45950.76 rows=2206620 width=0) (actual time=781.820..781.820 rows=2276859 loops=1)
                             Index Cond: ((l_shipdate >= '1995-07-01'::date) AND (l_shipdate < '1995-09-29 00:00:00'::timestamp without time zone))
                             Buffers: shared hit=4 read=6135 written=59
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.049..16.411 rows=40959 loops=1)
         Buffers: shared hit=116 read=1004
   ->  Sort  (cost=1198202.53..1198211.59 rows=3626 width=12) (actual time=15662.257..15662.259 rows=1 loops=1)
         Sort Key: revenue12.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=828634 read=504860 dirtied=626 written=20038
         ->  Subquery Scan on revenue12  (cost=1197906.57..1197988.16 rows=3626 width=12) (actual time=15657.660..15662.213 rows=1 loops=1)
               Buffers: shared hit=828634 read=504860 dirtied=626 written=20038
               ->  HashAggregate  (cost=1197906.57..1197951.90 rows=3626 width=12) (actual time=15657.657..15662.209 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=828634 read=504860 dirtied=626 written=20038
                     ->  Bitmap Heap Scan on lineitem  (cost=46502.42..1159290.72 rows=2206620 width=12) (actual time=1123.984..6288.626 rows=2245066 loops=1)
                           Recheck Cond: ((l_shipdate >= '1995-07-01'::date) AND (l_shipdate < '1995-09-29 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=660608
                           Buffers: shared hit=463028 read=203719 dirtied=626 written=18447
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..45950.76 rows=2206620 width=0) (actual time=877.389..877.389 rows=2275745 loops=1)
                                 Index Cond: ((l_shipdate >= '1995-07-01'::date) AND (l_shipdate < '1995-09-29 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=1035 read=5104
 Planning time: 2.698 ms
 Execution time: 15692.319 ms
(38 rows)

drop view revenue12;
DROP VIEW
COMMIT;
COMMIT