java - JPA 选择忽略 OR 部分

标签 java mysql jpa select eclipselink

我有选择查询:

SELECT entity
FROM EnterpriseEventLog entity 
WHERE entity.enterprise.recordId = :recordIdEnterprise     
OR  entity.group.enterprise.recordId = :recordIdEnterprise

但是 JPA 忽略了“entity.enterprise.recordId = :recordIdEnterprise”部分,选择工作就像没有这样的部分一样。如果我删除这个“OR entity.group.enterprise.recordId = :recordIdEnterprise”选择工作正常并提取数据。
我使用 mySql 5.5 和 EclipseLink 2.5.1
这是我的类(class)示例:

@Entity (name = "EnterpriseEventLog")
@Table (name = "ENTERPRISE_EVENT_LOG")
public class EnterpriseEventLogEntity {

  @ManyToOne (fetch = FetchType.LAZY)
  @JoinColumn (name = "RECORD_ID_ENTERPRISE", updatable = false)
  private EnterpriseEntity enterprise;

  @ManyToOne (fetch = FetchType.LAZY)
  @JoinColumn (name = "RECORD_ID_GROUP", updatable = false)
  private GroupEntity group;
}


@Entity (name = "Enterprise")
@Table (name = "ENTERPRISE")
public class EnterpriseEntity extends EntityBase {

  @OneToMany (fetch = FetchType.LAZY, mappedBy = "enterprise", cascade = CascadeType.ALL)
  private List<EnterpriseEventLogEntity> eventLog = new ArrayList<> ();
}


@Entity (name = "Group")
@Table (name = "VGROUP")
public class GroupEntity extends EntityBase {

  @NotNull
  @ManyToOne (fetch = FetchType.LAZY, optional = false)
  @JoinColumn (name = "RECORD_ID_ENTERPRISE", nullable = false, updatable = false)
  private EnterpriseEntity enterprise;

  @OneToMany(fetch = FetchType.LAZY, mappedBy = "group", cascade = CascadeType.ALL)
  private List<EnterpriseEventLogEntity> eventLog = new ArrayList<>();
}


@MappedSuperclass
public class EntityBase {

  @Id
  @NotNull    
  @Column (name = "RECORD_ID", nullable = false)
  private Long recordId;
}

最佳答案

作为JB Nizet在他的评论中说,问题是 entity.group 是一个内部连接。
所以正确的查询是:

SELECT entity
FROM EnterpriseEventLog entity LEFT JOIN entity.group group LEFT JOIN entity.enterprise enterprise
WHERE enterprise.recordId = :recordIdEnterprise     
OR  group.enterprise.recordId = :recordIdEnterprise

更多信息在这里:EclipseLink User Guide

关于java - JPA 选择忽略 OR 部分,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28702578/

相关文章:

java - 提取特征HOG描述符

java - 加入 SAAJ 和 JAXB

java - 如何使用 HTTPURLConnection 和 put 方法创建目录。它总是创建一个文件而不是目录

java.util.zip.ZipException : invalid compression method

mysql - 如何列出员工每周是否记录时间

java - Gradle 不会自动发现 JPA 实体类

php - Symfony 3 Doctrine 未定义索引

c# - 优化 sqlite 插入查询

java - 存储动态 JPA 查询

java - JPA 计算相关实体而不加入它们