Oracle 数据库 APEX集成ORDS发布数据的权限控制

摘要：

本文将围绕Oracle数据库中，如何使用APEX集成ORDS（Oracle REST Data Services）来发布数据，并实现权限控制的主题进行探讨。通过分析APEX和ORDS的基本原理，我们将编写相关代码，实现基于角色的数据访问控制，确保数据安全。

一、

随着互联网技术的不断发展，企业对数据访问的需求日益增长。Oracle数据库作为企业级数据库，提供了强大的数据管理功能。APEX（Application Express）和ORDS（Oracle REST Data Services）是Oracle数据库提供的两款强大工具，分别用于Web应用开发和RESTful API服务。本文将结合这两款工具，探讨如何实现Oracle数据库数据的权限控制。

二、APEX与ORDS简介

1. APEX简介

APEX是Oracle数据库提供的一款Web应用开发工具，它允许用户使用HTML、JavaScript和PL/SQL等编程语言，快速开发Web应用。APEX内置了丰富的组件和功能，如表单、报表、图表等，可以满足大多数Web应用开发需求。

2. ORDS简介

ORDS是Oracle数据库提供的一款RESTful API服务工具，它可以将Oracle数据库中的数据以JSON、XML等格式暴露给外部应用。ORDS支持多种编程语言，如Java、Python、Node.js等，方便外部应用进行数据访问。

三、基于APEX集成ORDS的权限控制实现

1. 创建ORDS服务

我们需要在Oracle数据库中创建ORDS服务，以便将数据以RESTful API的形式暴露给外部应用。

sql
BEGIN

  ORDS_admin_api.create_schema(

    p_schema => 'YOUR_SCHEMA',

    p_url_mapping_type => 'BASE_PATH',

    p_url_mapping_pattern => '/your_service',

    p_auto_rest_auth => FALSE,

    p_enabled => TRUE

  );

END;

/

2. 创建数据表和角色

在数据库中创建数据表和角色，用于存储数据和定义权限。

sql
CREATE TABLE your_table (

  id NUMBER PRIMARY KEY,

  data VARCHAR2(100)

);

CREATE ROLE read_role;

CREATE ROLE write_role;

GRANT SELECT ON your_table TO read_role;

GRANT INSERT, UPDATE, DELETE ON your_table TO write_role;

3. 创建APEX应用

在APEX中创建一个新应用，用于管理数据和权限。

（1）创建数据模型

在APEX中创建数据模型，将数据库中的数据表与模型关联。

（2）创建页面

创建一个页面，用于展示数据表中的数据。

（3）创建角色

在APEX中创建角色，将数据库中的角色与APEX角色关联。

4. 实现权限控制

在APEX页面中，根据用户角色动态显示数据表中的数据。

```sql

BEGIN

IF :APP_USER IN ('read_role', 'write_role') THEN

-- 显示数据

apex_application.globals.page_count := 1;

apex_application.globals.page_items_per_page := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups := 1;

apex_application.globals.page_current_group := 1;

apex_application.globals.page_next_group := 2;

apex_application.globals.page_prev_group := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_items := 10;

apex_application.globals.page_current_item := 1;

apex_application.globals.page_first_item := 1;

apex_application.globals.page_last_item := 10;

apex_application.globals.page_next_item := 11;

apex_application.globals.page_prev_item := 0;

apex_application.globals.page_first_item_in_group := 1;

apex_application.globals.page_last_item_in_group := 10;

apex_application.globals.page_total_groups :=