org.postgresql.util.PSQLException：错误：运算符不存在：整数= bytea

我正在尝试从 Spring Boot 应用程序执行本机查询，但收到此错误“ org.postgresql.util.PSQLException：错误：运算符不存在：整数 = bytea ”

这是我为实现此目的而编写的代码

  @SqlResultSetMapping(
    name = "StudentAssessmentValue",
    classes = @ConstructorResult(
            targetClass = StudentAssessmentDTO.class,
            columns = {
                    @ColumnResult(name = "subject_title", type = String.class),
                    @ColumnResult(name = "assessment", type = String.class),
            }
    )
  )


  @NamedNativeQuery(
                    name = "getStudentSubjectsAssessment",
                    query = "SELECT\n" +
                            "   subject.subject_title,\n" +
                            "   j as assessment\n" +
                            "FROM   assessment s\n" +
                            "JOIN   LATERAL jsonb_array_elements(s.assessment) j(elem) ON (j.elem->>'student_id') = :student_id\n" +
                            "JOIN subject ON subject.id = s.subject_id\n" +
                            "WHERE s.subject_id IN (:subjects)\n" +
                            "AND s.academy_year_id = :academy_year_id\n" +
                            "AND s.term_id = :term_id\n" +
                            "AND s.section_id = :section_id"
                    ,
                    resultSetMapping = "StudentAssessmentValue"
            )

这是我的存储库中的代码

 @Query(nativeQuery = true, name = "getStudentSubjectsAssessment")
  List<StudentAssessmentDTO> getStudentAssessments2(
        @Param("student_id") String student_id,
        @Param("academy_year_id") Integer academy_year_id,
        @Param("section_id") Integer section_id,
        @Param("term_id") Integer term_id,
        @Param("subjects") Integer[] subjects
);

我的控制器中有这个

   @GetMapping("/{student_id}/{academy_year_id}/{section_id}/
   term_id}")
    public List<StudentAssessmentDTO> getStudentAssessment2(
        @PathVariable("student_id") String student_id,
        @PathVariable("academy_year_id") Integer academy_year_id,
        @PathVariable("section_id") Integer section_id,
        @PathVariable("term_id") Integer term_id,
        @RequestParam(value = "subjects") Integer[] subjects
   ){
    return assessmentService.getStudentAssessments2(student_id, academy_year_id, section_id, term_id, subjects);
   }

我还注意到如果我从查询中删除这部分 WHERE s.subject_id IN (:subjects) 或说我对主题值进行硬编码，如 s.subject_id IN (2,3,4) 代码成功运行。但如果该值来自请求，我就会收到错误。请求如下所示

本地主机:8080/评估/f3df0bc2-7b4c-49b9-86c9-6e6b01628623/3/4/1?subjects=2,3,4

我最近有一个与你类似的问题 https://stackoverflow.com/questions/57865149/postgres-bytea-error-when-binding-null-to-prepared-statements，同时还可以在 Postgres 上使用本机 JPA 查询。这对我有用：

// sqlString contains your native query

Query query = entityManager.createNativeQuery(sqlString, StudentAssessmentDTO.class);
query.setParameter("subjects", subjects);
query.setParameter("academy_year_id", new TypedParameterValue(IntegerType.INSTANCE, academy_year_id));
query.setParameter("term_id", new TypedParameterValue(IntegerType.INSTANCE, term_id));
query.setParameter("section_id", new TypedParameterValue(IntegerType.INSTANCE, section_id));
List< StudentAssessmentDTO > = query.getResultList();

您看到的错误可以解释为 Postgres JDBC 驱动程序无法正确地将所需的类型信息传递到数据库。例如，出现以下错误：

错误：运算符不存在：整数 = bytea

发生这种情况是因为驱动程序将参数作为字节数组传递给 Postgres，但目标列是整数类型。通过使用上面的类型“提示”，我们可以强制驱动程序传递正确的类型信息。