Jasper reports 从Ireport调用时如何在过程中调用和添加条件？

我已经使用Ireport 4.5创建了一个报告，但报告运行速度非常慢，我想这是因为有多个联合和联接

我复制了一个简单的查询以进行测试：-

   SELECT b.Project_Id,
       b.Project_Manager,
       b.project_title,
       b.Project_location,
       b.Project_Level,
      SUM(COALESCE(b.Project_Budget, 0)) Projected,
      SUM(COALESCE(c.Accounting, 0)) Actual
   FROM t_authorized_budget a, t_project_c b,t_project_allocation c
   WHERE a.Project_Id = b.Project_Id and b.project_id=c.`Key` 
        and a.Project_Id = c.`Key`
        and $X{IN,b.project_location,p_project_location}
        and $X{IN,b.project_manager,p_project_manager}
        and $X{IN,b.project_id,p_project_id};

因此，我使用这个查询创建了一个过程调用GetAllcompo（），但没有

        $X{IN,b.project_location,p_project_location}
        and $X{IN,b.project_manager,p_project_manager}
        and $X{IN,b.project_id,p_project_id};

现在我试图在从Ireport调用时在过程中添加这些条件。

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我该怎么做呢？

您需要使用该程序吗？我通过添加另一个参数来实现这一点。首先，提示用户定义您使用的WHERE子句的类型：

$P{PROJECT_PROMPT}

然后使用定义WHERE子句的默认表达式创建第二个参数（$p{PROJECT_SQL_DEF}）：

 $P{PROJECT_PROMPT} == 'SHORT' ? 
      " ' a.Project_Id = b.Project_Id 
      and b.project_id=c.Key 
      and a.Project_Id = c.Key '" : 

      " ' a.Project_Id = b.Project_Id and b.project_id=c.`Key` 
      and a.Project_Id = c.`Key`
      and $X{IN,b.project_location,p_project_location}
      and $X{IN,b.project_manager,p_project_manager}
      and $X{IN,b.project_id,p_project_id} ' " 

在您的查询中：

 SELECT b.Project_Id,
   b.Project_Manager,
   b.project_title,
   b.Project_location,
   b.Project_Level,
  SUM(COALESCE(b.Project_Budget, 0)) Projected,
  SUM(COALESCE(c.Accounting, 0)) Actual
FROM t_authorized_budget a, t_project_c b,t_project_allocation c
WHERE $P!{PROJECT_SQL_DEF}

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另一个想法——如果你把null传递给$X{…，它等于1=1。那么如果你使用完整的WHERE子句，只是不把参数传递给$X{…？我认为如果我们不把任何参数传递给$X{}，意味着所有的值都没有任何WHERE条件。你认为呢？是的，它就像“和$X”{IN，b.project_location，p_project_location}”替换为“and 1=1”。它将为您提供所有b.project_location值。