@Entity
@Table(name = "SomeTable")
public class SomeEntity implements Serializable {
@Column(name = "MODIFIED")
private Timestamp modifiedDt;
}
如果有插入/更新操作,我应该如何指示“modifiedDt”使用oracle时间戳?
如果没有触发器或类似的事情在数据库端进行表格。
我试过下面但没有运气,
@Column(name = "TS_MODIFIED", columnDefinition = "TIMESTAMP ON UPDATE CURRENT TIMESTAMP")
答案 0 :(得分:0)
您应该能够定义列以在更新行时将值更新为当前时间戳,如下所示:
CREATE TABLE SomeTable(
MODIFIED TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
);
答案 1 :(得分:0)
使用实体侦听器。请参阅Hibernate手册chapter 6, "Entity listeners and callback methods"。
在您的情况下,您可能希望应用并实施sentence <- c("case sweden", "meeting minutes ht board meeting st march now also attachment added agenda today s board meeting", "draft meeting minutes board meeting final meeting minutes ht board meeting rd april")
sentence <- cbind(sentence)
word_table <- do.call(rbind, strsplit(as.character(sentence), " "))
test <- cbind(sentence, word_table)
和@PrePersist
回调。有点像...
@PreUpdate