Java JPQL更新查询
我有这样一个实体:Java JPQL更新查询,java,sql,hibernate,jpa,jpql,Java,Sql,Hibernate,Jpa,Jpql,我有这样一个实体: @Entity @Table(name = "QUESTION_GROUP_TEXT") @NamedQueries({ @NamedQuery( name = EntityUtils.NamedQuery.UPDATE_QUESTION_GROUP_TEXT, query = "UPDATE QuestionGroupText T SET T.localizedText.content = :c
@Entity
@Table(name = "QUESTION_GROUP_TEXT")
@NamedQueries({
@NamedQuery(
name = EntityUtils.NamedQuery.UPDATE_QUESTION_GROUP_TEXT,
query = "UPDATE QuestionGroupText T SET T.localizedText.content = :content WHERE T.generatedId = :generatedId")
})
public class QuestionGroupText implements Serializable {
@Column(name = "GENERATED_ID", nullable = false, unique = true)
private String generatedId = generateId();
@ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
@JoinColumn(name = "LOCALIZED_TEXT_ID", nullable = false)
private LocalizedText localizedText;
//Getters and setters
}
此查询:updatequestiongrouptext T SET T.localizedText.content=:content其中T.generatedId=:generatedId
不起作用,它抛出:
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'set CONTENT='Question Label' where GENERATED_ID='AD78F9B5E2A146D9AB9D94096DA835B' at line 1
查询的这一部分一定有问题:
T.localizedText.content
,是否有任何方法可以更改它以使其正常工作?在我看来,您正在尝试更新此表中的外键
我认为正确的方法是更新本地化文本 属性localizedText是实体localizedText表的外键 您的查询尝试将:content(无论是什么类型)设置为外键列。这是行不通的。是否定义了表LocalizedText 您可以做什么:
generatedId seams是正确的位置我能够重写我需要的查询:
UPDATE LocalizedText L SET L.content = :content WHERE EXISTS (SELECT T FROM QuestionGroupText T WHERE T.localizedText.id = L.id AND T.generatedId = :generatedId)