BEGIN;
BEGIN
create or replace view revenue20 (supplier_no, total_revenue) as
	select
		l_suppkey,
		sum(l_extendedprice * (1 - l_discount))
	from
		lineitem
	where
		l_shipdate >= '1995-04-01'
		and l_shipdate < date'1995-04-01' + 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,
	revenue20
where
	s_suppkey = supplier_no
	and total_revenue = (
		select
			max(total_revenue)
		from
			revenue20
	)
order by
	s_suppkey;
                                                                                       QUERY PLAN                                                                                        
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Merge Join  (cost=2359714.10..2364811.63 rows=3755 width=79) (actual time=16371.198..16371.207 rows=1 loops=1)
   Merge Cond: (supplier.s_suppkey = revenue20.supplier_no)
   Buffers: shared hit=1017581 read=302516 dirtied=1 written=2547
   InitPlan 1 (returns $0)
     ->  Aggregate  (cost=1171288.18..1171288.19 rows=1 width=8) (actual time=8121.445..8121.445 rows=1 loops=1)
           Buffers: shared hit=418026 read=240895 written=134
           ->  HashAggregate  (cost=1171203.69..1171241.24 rows=3755 width=12) (actual time=8071.733..8111.225 rows=100000 loops=1)
                 Group Key: lineitem_1.l_suppkey
                 Buffers: shared hit=418026 read=240895 written=134
                 ->  Bitmap Heap Scan on lineitem lineitem_1  (cost=47817.04..1148651.03 rows=2255266 width=12) (actual time=1191.675..6083.605 rows=2246122 loops=1)
                       Recheck Cond: ((l_shipdate >= '1995-04-01'::date) AND (l_shipdate < '1995-06-30 00:00:00'::timestamp without time zone))
                       Heap Blocks: exact=652780
                       Buffers: shared hit=418026 read=240895 written=134
                       ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47253.23 rows=2255266 width=0) (actual time=930.541..930.541 rows=2250533 loops=1)
                             Index Cond: ((l_shipdate >= '1995-04-01'::date) AND (l_shipdate < '1995-06-30 00:00:00'::timestamp without time zone))
                             Buffers: shared hit=1 read=6140 written=32
   ->  Index Scan using pk_supplier on supplier  (cost=0.29..4791.49 rows=100000 width=71) (actual time=0.042..32.466 rows=82932 loops=1)
         Buffers: shared hit=2255
   ->  Sort  (cost=1188425.62..1188435.01 rows=3755 width=12) (actual time=16330.600..16330.603 rows=1 loops=1)
         Sort Key: revenue20.supplier_no
         Sort Method: quicksort  Memory: 25kB
         Buffers: shared hit=1015326 read=302516 dirtied=1 written=2547
         ->  Subquery Scan on revenue20  (cost=1188118.19..1188202.67 rows=3755 width=12) (actual time=16325.772..16330.567 rows=1 loops=1)
               Buffers: shared hit=1015326 read=302516 dirtied=1 written=2547
               ->  HashAggregate  (cost=1188118.19..1188165.12 rows=3755 width=12) (actual time=16325.770..16330.562 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=1015326 read=302516 dirtied=1 written=2547
                     ->  Bitmap Heap Scan on lineitem  (cost=47817.04..1148651.03 rows=2255266 width=12) (actual time=1991.115..6378.550 rows=2246122 loops=1)
                           Recheck Cond: ((l_shipdate >= '1995-04-01'::date) AND (l_shipdate < '1995-06-30 00:00:00'::timestamp without time zone))
                           Heap Blocks: exact=652780
                           Buffers: shared hit=597300 read=61621 dirtied=1 written=2413
                           ->  Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx  (cost=0.00..47253.23 rows=2255266 width=0) (actual time=1630.654..1630.654 rows=2249652 loops=1)
                                 Index Cond: ((l_shipdate >= '1995-04-01'::date) AND (l_shipdate < '1995-06-30 00:00:00'::timestamp without time zone))
                                 Buffers: shared hit=386 read=5755 written=165
 Planning time: 2.797 ms
 Execution time: 16380.287 ms
(38 rows)

drop view revenue20;
DROP VIEW
COMMIT;
COMMIT