Oracle创建function函数

create or replace function getid(newId in number)
　　return number
is
　　isInsert number(8);
begin
　　isInsert:=0;
　　--查出v_calling_type
　　select flow_id into isInsert from apply_flow1@dblinktojm where flow_id=newId;
　　return isInsert;
exception
　　when others then
　　return 0;

end getid;