ON UPDATE CURRENT_TIMESTAMP和JPA

I have an entity with fields

我有一个带字段的实体

@Temporal(TemporalType.TIMESTAMP)
@Column(name = "edit_timestamp", 
        columnDefinition="TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP")
private Date editTimestamp;

@Version
@Column(name = "edit_count")
private short editCount;

private String text;
@Te