Java 如何将本机查询的结果集转换为DTO列表
我有以下DTO:Java 如何将本机查询的结果集转换为DTO列表,java,postgresql,hibernate,jpa,dto,Java,Postgresql,Hibernate,Jpa,Dto,我有以下DTO: @Data @NoArgsConstructor @AllArgsConstructor public class EmployeeHierarchyDto { private Integer id; private Integer supervisorId; private Integer level; private String branch; private Integer position; } 然后我有了这个本机查询:
@Data
@NoArgsConstructor
@AllArgsConstructor
public class EmployeeHierarchyDto {
private Integer id;
private Integer supervisorId;
private Integer level;
private String branch;
private Integer position;
}
然后我有了这个本机查询:
public List<EmployeeDto> getAllSubordinateSubordinates(Integer employeeId) {
if (employeeId == null) {
employeeId = getCeo().getId();
}
EntityManager em = getEntityManager();
String sqlString = "select t.id, " +
"t.supervisor_id, " +
"t.level, " +
"t.branch, " +
"t.pos " +
"FROM connectby('public.employee'::text, 'id'::text, 'supervisor_id'::text, 'last_name'::text, " + "'" + employeeId +
"'::text, 0, '~'::text) t(id int, supervisor_id int, level integer, branch text, pos integer);";
Query q = em.createNativeQuery(sqlString);
List hierarchyList = q.getResultList();
List<EmployeeDto> employeeDtoList = new ArrayList<>();
return employeeDtoList;
}
上述查询在db控制台中执行100%正确
编辑:
确切的错误是:
11:39:50,711 WARN [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-3) SQL Error: 0, SQLState: 42601
11:39:50,714 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-3) ERROR: syntax error at or near ":"
Position: 88
42601指向PostgreSQL语法错误,但是,如果从调试器复制将成为本机查询的字符串并粘贴到db控制台中,则该字符串可以正常工作
为什么会这样?其次,我如何将结果集映射到EmployeeHierarchyDto的列表,它似乎与postgres的cast操作符使用的语法有关。 这是因为::type cast运算符与JPA:named参数语法冲突
有很多解决方法,请参见
我遇到了一个奇怪的错误
。我们应该猜猜吗?@NikolaiShevchenko对不起,朋友,不用猜了。我更新了问题。谢谢,用\\:\\:避开::符号非常有效!
11:39:50,711 WARN [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-3) SQL Error: 0, SQLState: 42601
11:39:50,714 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-3) ERROR: syntax error at or near ":"
Position: 88