[GitHub] [incubator-shardingsphere] liwu3230 opened a new issue #4345: Springboot+Jpa+sharding-jdbc 跨多表查询走结果归并后，返回的数据类型不是包装类而被转成有默认值的基本数据类型

Mon, 17 Feb 2020 17:57:13 -0800 

liwu3230 opened a new issue #4345: Springboot+Jpa+sharding-jdbc 
跨多表查询走结果归并后，返回的数据类型不是包装类而被转成有默认值的基本数据类型
URL: https://github.com/apache/incubator-shardingsphere/issues/4345
 
 
   
![image](https://user-images.githubusercontent.com/39552013/74697000-61c07000-5234-11ea-87b1-499fbaae63d3.png)
   
![image](https://user-images.githubusercontent.com/39552013/74697059-7bfa4e00-5234-11ea-8ce8-9669fa427553.png)
   
图片中joinMsgTicketPmsMsgStatereport.get("result")对应的java类型是Integer,数据库字段类型为int（11），单表查询的时候如果查询结果中result字段为null，可以映射为null回来，但是如果是跨多表查询，走了结果归并的话，返回的会是0
 ，这与直接执行sql的结果不一致，在很多业务场景中null是有意义的
   

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