BEGIN; BEGIN create or replace view revenue11 (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 select s_suppkey, s_name, s_address, s_phone, total_revenue from supplier, revenue11 where s_suppkey = supplier_no and total_revenue = ( select max(total_revenue) from revenue11 ) order by s_suppkey; QUERY PLAN -------------------------------------------------------------------------------------------------------------------------------------------------------- Merge Join (cost=2357513.24..2362610.56 rows=3741 width=79) Merge Cond: (supplier.s_suppkey = revenue11.supplier_no) InitPlan 1 (returns $0) -> Aggregate (cost=1170231.84..1170231.85 rows=1 width=8) -> HashAggregate (cost=1170147.66..1170185.07 rows=3741 width=12) Group Key: lineitem_1.l_suppkey -> Bitmap Heap Scan on lineitem lineitem_1 (cost=47581.81..1147711.32 rows=2243634 width=12) Recheck Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone)) -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..47020.90 rows=2243634 width=0) Index Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone)) -> Index Scan using pk_supplier on supplier (cost=0.29..4791.49 rows=100000 width=71) -> Sort (cost=1187281.10..1187290.46 rows=3741 width=12) Sort Key: revenue11.supplier_no -> Subquery Scan on revenue11 (cost=1186974.92..1187059.09 rows=3741 width=12) -> HashAggregate (cost=1186974.92..1187021.68 rows=3741 width=12) Group Key: lineitem.l_suppkey Filter: (sum((lineitem.l_extendedprice * (1::double precision - lineitem.l_discount))) = $0) -> Bitmap Heap Scan on lineitem (cost=47581.81..1147711.32 rows=2243634 width=12) Recheck Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone)) -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..47020.90 rows=2243634 width=0) Index Cond: ((l_shipdate >= '1994-04-01'::date) AND (l_shipdate < '1994-06-30 00:00:00'::timestamp without time zone)) Planning time: 3.056 ms (22 rows) drop view revenue11; DROP VIEW COMMIT; COMMIT