在Hibernate中设置更新和插入属性 [英] Setting update and insert property in Hibernate

问题描述

在hibernate HBM文件中，设置以下属性的目的是什么？

  update =false
 insert =false
  

它们的用途是什么？他们对表演有什么不同？何时使用它们？

/3.6/reference/en-US/html_single/#d0e6525rel =noreferrer>文档：

更新，insert（可选 - 默认为true）：指定
映射列应该包含在SQL UPDATE和/或INSERT
语句中。将两者都设置为false允许一个纯粹的派生属性
，其值由映射到
相同列的某个其他属性或触发器或其他应用程序初始化。

In the hibernate HBM file, what is the purpose of setting the following properties?

update = "false"
insert = "false"

What purpose do they serve? What difference do they make to the performance? When should we use them?

解决方案

From the documentation:

update, insert (optional - defaults to true): specifies that the mapped columns should be included in SQL UPDATE and/or INSERT statements. Setting both to false allows a pure "derived" property whose value is initialized from some other property that maps to the same column(s), or by a trigger or other application.

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