JPQL Update Query

Question

I have an entity like this:

@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

}

This query: UPDATE QuestionGroupText T SET T.localizedText.content = :content WHERE T.generatedId = :generatedId does not work, it throws:

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

There must be something wrong with this part of the query: T.localizedText.content, is there any way I can change it to make this work?

Solution

I was able to rewrite the query that I needed:

UPDATE LocalizedText L SET L.content = :content WHERE EXISTS (SELECT T FROM QuestionGroupText T WHERE T.localizedText.id = L.id AND T.generatedId = :generatedId)