Java JPA选择忽略或部分忽略
我已选择查询:Java JPA选择忽略或部分忽略,java,mysql,jpa,select,eclipselink,Java,Mysql,Jpa,Select,Eclipselink,我已选择查询: SELECT entity FROM EnterpriseEventLog entity WHERE entity.enterprise.recordId = :recordIdEnterprise OR entity.group.enterprise.recordId = :recordIdEnterprise 但是JPA忽略了部分“entity.enterprise.recordId=:recordIdEnterprise”,select的工作原理就像没有这样
SELECT entity
FROM EnterpriseEventLog entity
WHERE entity.enterprise.recordId = :recordIdEnterprise
OR entity.group.enterprise.recordId = :recordIdEnterprise
但是JPA忽略了部分“entity.enterprise.recordId=:recordIdEnterprise”,select的工作原理就像没有这样的部分一样。如果我删除此“或entity.group.enterprise.recordId=:recordIdEnterprise”,请选择正确工作并提取数据我将mySql 5.5与EclipseLink 2.5.1一起使用
以下是我的课程示例:
@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;
}
@Entity(name=“EnterpriseEventLog”)
@表(name=“企业事件日志”)
公营企业股东权{
@manytone(fetch=FetchType.LAZY)
@JoinColumn(name=“RECORD\u ID\u ENTERPRISE”,updateable=false)
私营企业;
@manytone(fetch=FetchType.LAZY)
@JoinColumn(name=“RECORD\u ID\u GROUP”,updateable=false)
私人集团实体集团;
}
@实体(名称=“企业”)
@表(name=“企业”)
公共类EnterpriseEntity扩展EntityBase{
@OneToMany(fetch=FetchType.LAZY,mappedBy=“enterprise”,cascade=CascadeType.ALL)
私有列表eventLog=newarraylist();
}
@实体(名称=“集团”)
@表(name=“VGROUP”)
公共类GroupEntity扩展EntityBase{
@NotNull
@manytone(fetch=FetchType.LAZY,可选=false)
@JoinColumn(name=“RECORD\u ID\u ENTERPRISE”,nullable=false,updateable=false)
私营企业;
@OneToMany(fetch=FetchType.LAZY,mappedBy=“group”,cascade=CascadeType.ALL)
private List eventLog=new ArrayList();
}
@映射超类
公共类实体库{
@身份证
@NotNull
@列(name=“RECORD\u ID”,nullable=false)
私有长记录ID;
}
正如他在评论中所说,问题在于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
此处的更多信息:您希望查询选择的实体有一个空组,对吗?提示:entity.group是一个内部联接。