PostgreSQL和Oracle对象关系存储与ORM一样吗? [英] Is PostgreSQL and Oracle Object-Relational storage the same as an ORM?

问题描述

PostgreSQL和Oracle对象关系映射的内置功能是否与Hibernate，SQLAlchemy或Doctrine等ORM相同?是否查询和使用了这些数据库，就像您从ORM取回的对象一样?

Is the built in ability of PostgreSQL and Oracle Object-Relational mapping the same as an ORM like Hibernate, SQLAlchemy, or Doctrine? Are these databases queried and used just like objects you'd get back from ORMs?

我是否误解了ORDBMS是什么? Stil学习. http://www.postgresql.org/docs/8.2/static/intro -whatis.html http://docs.oracle.com/cd/E11882_01/appdev .112/e11822/toc.htm

Do I misunderstand what an ORDBMS is? Stil learning. http://www.postgresql.org/docs/8.2/static/intro-whatis.html http://docs.oracle.com/cd/E11882_01/appdev.112/e11822/toc.htm

我也在这里找到它.

http://en.wikipedia.org/wiki/Comparison_of_object-relational_database_management_systems

推荐答案

ORDBMS(对象关系数据库管理系统)是指 PostgreSQL 中的一些面向对象的功能:

The "O" in ORDBMS (Object Relational Database Management System) refers to some object-oriented features in PostgreSQL:

• OID(大多数非系统表已弃用)

• OIDs (mostly deprecated for non-system tables)

继承

点函数调用语法

用户定义的类型系统，包括复合类型

User-definable type system including composite types

上下文相关的运算符和函数.

Context-sensitive operators and functions.

有待讨论的是在哪里准确划清界限.这是最近的讨论pgsql-advocacy列表，其中包含更多详细信息.

It's up for debate where to draw the line exactly. Here is a recent discussion on the pgsql-advocacy list with more details.

所有这些与"Hibernate，SQLAlchemy或Doctrine之类的ORM" 本质上完全不同.
ORM(对象关系映射)试图翻译相应编程语言的对象数据库中的关系.

All of this is very different in nature from "ORMs like Hibernate, SQLAlchemy or Doctrine".
An ORM (Object-relational mapping) is trying to translate objects of the respective programming language to relations in a database.

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