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;
}
然后再有这个本地查询:
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;
}
[当我调试代码并将生成的sql字符串复制到db控制台时,如果前端通过了ID为93,这就是我得到的:
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, '93'::text, 0, '~'::text) t(id int, supervisor_id int, level integer, branch text, pos integer);
以上查询在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,如果将从调试器复制将成为本机查询的字符串并将其粘贴到数据库控制台中,则它将毫无问题地工作。
为什么会这样?其次,如何将结果集映射到EmployeeHierarchyDto的列表
似乎与postgres的cast运算符使用的语法有关。有很多解决方法。参见cast-operator-issue-with-jpa