Question

我有一个简单的存储过程：

SELECT NVL(pnum,0)
      INTO emp_pnum 
      FROM employee_pnum 
     WHERE person_id = i_person_id
       AND pn_status_id = (SELECT pn_status_id FROM ems.pn_status WHERE pn_status_desc = 'Active');

SELECT NVL(pnum,0)
      INTO old_pnum 
      FROM employee_pnum_history
     WHERE person_id = i_person_id    
       AND created_date = (SELECT MAX(created_date) FROM ems.employee_pnum_history WHERE person_id = i_person_id);

OPEN x_pnum_history
   FOR SELECT emp_pnum,old_pnum
         FROM dual;

因此返回游标x_pnum_history。我想要的是将结果集读入类中，如下所示

EmployeePNum empPnum = new EmployeePNum();
empPnum.setCurrent_pnum(rs.getString("emp_pnum"));
empPnum.setOld_pnum(rs.getString("old_pnum"));

它说

CallableStatementCallback; bad SQL grammar [{call EMS.EMS_PKG.GET_EMP_PNUM(?, ?, ?, ?)}];
nested exception is java.sql.SQLException: Invalid column name

我不确定这里到底出了什么问题......我们非常感谢任何帮助。

Answer 1

执行此操作时：

OPEN x_pnum_history
   FOR SELECT emp_pnum,old_pnum
         FROM dual;

...您正在从PL / SQL块的范围中选择值，但您生成的列没有名称。你可以看到与此类似的东西（通过SQL Developer运行）：

var rc refcursor

declare
  emp_pnum number;
begin
  emp_pnum := 1;
  open :rc for select emp_pnum as emp_pnum from dual;
end;
/

anonymous block completed

print rc

RC
---------------------------------------
:B1                                     
--------------------------------------- 
1

请注意，列标题显示通用绑定标记:B1。但是，如果我明确地对列进行别名，那么这就是：

declare
  emp_pnum number;
begin
  emp_pnum := 1;
  open :rc for select emp_pnum as emp_pnum from dual;
end;
/

anonymous block completed

print rc

RC
---------------------------------------
EMP_PNUM                                
--------------------------------------- 
1

因此，在您的情况下，您需要更改您的程序以包含别名：

OPEN x_pnum_history
   FOR SELECT emp_pnum as emp_pnum, old_pnum as old_pnum
         FROM dual;

当然，假设您的驱动程序和版本可以处理命名参数。我认为您仍然可能需要在getString()电话中使用大写名称。

存储的proc游标返回时带有getstring（列名）的无效列名

1 个答案: