Question

我是Spring的新手，我遇到以下问题的问题：

    String rejected_offer_query = "SELECT b.job_instance_id, b.start_time, count (*) " + 
        "FROM SygaOfferRejected s , BatchJobExecution b, BatchJobInstance bi "+
        "where s.heure_debut = b.start_time " +
        "and s.heure_fin = b.end_time " +   
        "and b.job_execution_id = bi.job_instance_id " + 
        "and bi.job_name = :batchName "+ 
        "and b.status = :batchStatus " +
        "group by b.job_instance_id";

它不返回数据，但结果应该返回一行:(直接使用MySql进行测试）。

我认为这是一个继承问题，因为当我尝试用超类执行相同的查询时，它可以工作：

 SELECT b.job_instance_id, b.start_time, count (*) " + 
        "FROM SygaOffer s , BatchJobExecution b, BatchJobInstance bi "+
        "where s.heure_debut = b.start_time " +
        "and s.heure_fin = b.end_time " +   
        "and b.job_execution_id = bi.job_instance_id " + 
        "and bi.job_name = :batchName "+ 
        "and b.status = :batchStatus " +
        "group by b.job_instance_id"

SygaOfferRejected 类扩展了 SygaOffer ，这是源代码;

@Entity
@Inheritance
@Table(name = "bob_syga_off")
public class SygaOffer {
  @Id
  private long id_offre; 
  private String acteur;  
  private String heure_debut;
  private String heure_fin;

private String reference_offre;
private int retry;
}

------------------------------------------

@Entity
@Table(name ="bob_syga_offr_rejected")
public class SygaOfferRejected extends SygaOffer{

 }

Answer 1

继承策略是我应该在父类中指定TABLE_PER_CLASS类型的问题：

@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)

希望有所帮助;）

继承在Query中不起作用

1 个答案: