Hibernate hbm2ddl.auto，可能的值，以及它们的功能 [英] Hibernate hbm2ddl.auto, possible values, and what they do

问题描述

我在查看Hibernate hbm2ddl.auto 配置属性及其可能的值：

• 验证


• 更新


• create


• create-drop

所有这些值是做什么的？ Hibernate参考文档只会简要地谈及 create-drop ，但不会说其他任何值：

hibernate.hbm2ddl.auto

自动验证或将架构DDL导出到数据库时会创建 SessionFactory 。使用 create-drop ，当 SessionFactory 明确关闭时，数据库模式将被删除。

eg validate | 更新 | 创建 | create-drop

我发现非常有用这些堆栈溢出问题的解释：

• Hibernate hbm2ddl.auto可能的值和他们做了什么？


• 模式不会丢失hbmddl.auto = create.drop

但官方文档中仍然没有。

解决方案

您提供的链接已经是官方文档。所以，今天没有什么更正式和全面的。

所以我想你的问题的答案是双重的：

• 要么在 Hibernate中提交增强请求问题跟踪器（更适合提案）


• 或阅读相应的代码
  

我知道这不是你梦寐以求的完美答案，但这实际上就是你今天所拥有的全部。

但好消息是，项目是开源的，所以你需要帮助完善它： - ）。

I am looking at the Hibernate hbm2ddl.auto configuration property and its possible values:

• validate
• update
• create
• create-drop

What do all these values do?

The Hibernate Reference Documentation only talks briefly about create-drop, but doesn't say anything about the other values:

hibernate.hbm2ddl.auto

Automatically validates or exports schema DDL to the database when the SessionFactory is created. With create-drop, the database schema will be dropped when the SessionFactory is closed explicitly.

e.g. validate | update | create | create-drop

I found very useful explanations in these Stack Overflow questions:

• Hibernate hbm2ddl.auto possible values and what they do?
• Schema is not dropped on hbmddl.auto = create.drop

But still nothing in the official documentation.

解决方案

The link you provided is already the official documentation. So, there's nothing more official and comprehensive as-of today.

So I guess the answer to your question is two-fold:

• either file an enhancement request in the Hibernate issue tracker (better with a proposal)
• or read the corresponding code

I know this isn't the perfect answer you dreamt about, but this is actually all you have today.

But the good news is that the project is open-source, so you have all you need to help improve it :-).

这篇关于Hibernate hbm2ddl.auto，可能的值，以及它们的功能的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！