Question

我正在创建一个本地查询，该查询从多个表中获取有限的字段。这些字段使用sql结果集映射映射到投影类构造函数。我正在尝试通过传递分页参数进行排序。排序属性是通过URL请求参数排序决定的。

下面是代码段

<named-native-query
        name="EmployeeDet.findEmployeeAddressDTOUsingPageableUsingNativeQuery"
        result-set-mapping="CustomEmplMappingUsingXml">
        <query><![CDATA[select e.id,e.empName,e.dateOfBirth as dob,e.gender,e.email,address.typename 
        as addtype,address.addressdet,et.employeeTypeName as employeeType
        from employeedet as e,Address as address,employeetype as et
         where address.empid=e.id and e.employeeTypeId=et.employeeTypeId 
         group by  e.id,e.empName,e.dateOfBirth,e.gender,e.email,address.typename, 
         address.addressdet,et.employeeTypeName ORDER BY ?#{#pageable}]]>
        </query>
    </named-native-query>


<sql-result-set-mapping
        name="CustomEmplMappingUsingXml">
        <constructor-result
            target-class="com.springdatajpa.config.dto.EmployeeAddressDtoProjectionClass">
            <column name="id" class="java.lang.Integer" />
            <column name="empName" class="java.lang.String" />
            <column name="email" class="java.lang.String" />
            <column name="dob" class="java.lang.String" />
            <column name="gender" class="java.lang.String" />
            <column name="addtype" class="java.lang.String" />
            <column name="addressdet" class="java.lang.String" />
            <column name="employeeType" class="java.lang.String" />
        </constructor-result>
    </sql-result-set-mapping>

上述查询是从存储库层调用的，其方法名称类似于命名的本机查询名称

@Query(nativeQuery=true)
    Page<EmployeeAddressDtoProjectionClass> findEmployeeAddressDTOUsingPageableUsingNativeQuery(Pageable pageable);

提到的可分页参数通过url传递，值为

?page=0&size=3&sort=empId,DESC

由于返回值为Page类型，因此我正在使用另一个查询来对行数进行计数

<named-native-query
    name="EmployeeDet.findEmployeeAddressDTOUsingPageableUsingNativeQuery.count">
    <query><![CDATA[select count(*) from employeedet as e,Address as address,employeetype et
        where address.empid=e.id and et.employeeTypeId=e.employeeTypeId 
        group by e.id,e.empName,e.dateOfBirth,e.gender,e.email,address.typename,address.addressdet,et.employeeTypeName
        ]]></query>
    </named-native-query>

上面的查询运行时出现错误

org.springframework.dao.InvalidDataAccessResourceUsageException：预期的位置参数计数：1，实际检测到0

我尝试了堆栈溢出中不同链接中提到的解决方案，但仍然遇到异常。

在Spring数据中使用本机查询对分页进行排序

0 个答案: