JPA: DELETE WHERE does not delete children and throws an exception

Question

I am trying to delete a large number of rows from MOTHER thanks to a JPQL query.

The Mother class is defined as follows:

@E         


        

Answer 1

You could relay on the RDBMS to delete those Mothers using foreign key constraint. This assumes your generateing your DDL from entities:

@Entity
@Table(name = "CHILD")
public class Child  implements Serializable {

    @ManyToOne
    @JoinColumn(name = "MOTHER_ID", foreignKey = @ForeignKey(foreignKeyDefinition =
        "FOREIGN KEY(MOTHER_ID) REFERENCES MOTHER(ID) ON DELETE CASCADE",
        value = ConstraintMode.CONSTRAINT))
    private Mother mother;    
}