ORA 06533:下标超出计数

Question

我创建了下面简单的块但得到了

ORA 06533:下标超出计数

错误.

有人可以告诉我在下面的代码中我缺少什么.

declare
  type salaryvarray is varray(6) of customers.salary%type;
  salary_array salaryvarray:=salaryvarray();
  c_salary customers.salary%type;
  i integer(2);
  counter number(2);
begin
  salary_array.extend;
  select count(*) into counter from customers;
  for i in 1..counter loop
    select salary into c_salary from customers where id =i;
    salary_array(i):=c_salary;
  end loop;
end;
/

Answer 1

array_var.extend代码的一部分需要在循环中.每次添加时,都会分配新内存.跳过这一步是要求代码存储一些东西而不给它空间.

declare
  type salaryvarray is varray(6) of customers.salary%type;
  salary_array salaryvarray:=salaryvarray();
  c_salary customers.salary%type;
  i integer(2);
  counter number(2);
begin
  select count(*) into counter from customers;
  for i in 1..counter loop
    salary_array.extend; -- Extend for each value.
    select salary into c_salary from customers where id =i;
    salary_array(i):=c_salary;
  end loop;
end;
/

但是,很快就会遇到类似的错误ORA-06532: Subscript outside of limit.您将VARRAY限制为6个元素,但客户可能会有更多元素.考虑限制返回,扩展VARRAY或实现更动态的集合类型.

Answer 2

您salary_array最多可以保存6个客户的工资，但您的select count(*) into counter from customers退货记录超过6条。

因此，数组无法保存数据，或者换句话说，无限下标大于 varray 的计数。