Question

我有以下数据：

sensitive = LOAD '/mdsba' using PigStorage(',') as (AGE,EDU,SEX,SALARY);
--Filtered the data by the city
Data_filter1 = FILTER sensitive by (SALARY matches '<=50K');
Data_filter2 = FILTER sensitive by (SALARY matches '>50K');
BA= group  Data_filter1 by (EDU,SEX) ; 

BB= foreach BA generate group as EDU, COUNT (Data_filter1) as cn:int;

BC= FILTER BB by (cn == 4);

Dump BC ;

=============================================== =========

我的Pig拉丁文字是：

<connectionStrings>
    <add name="TestContext" connectionString="Data Source=REALEXISTINGSERVER;Initial Catalog=TestDb; Integrated Security=true" providername="System.Data.SqlClient" 
    xdt:Transform="SetAttributes" xdt:Locator="Match(name)"/>
  </connectionStrings>

错误消息：

java.lang.ClassCastException：java.lang.Integer无法强制转换为java.lang.Long

任何帮助，请

Answer 1

您遇到的问题是您正在将int数据类型与长数据类型混合使用。

您需要手动将int转换为long。

Answer 2

问题是COUNT返回long但你将它转换为int 您的代码应如下所示：

BB= foreach BA generate group as EDU, COUNT (Data_filter1) as cn;

或

BB= foreach BA generate group as EDU, COUNT (Data_filter1) as cn:long;

猪拉丁语法错误

2 个答案: