您好,登录后才能下订单哦!
PostgreSQL是一个功能强大的开源关系型数据库管理系统,它支持自定义扩展,以便用户可以根据自己的需求扩展其功能
了解PostgreSQL扩展的基本概念 在开始开发之前,了解PostgreSQL扩展的基本概念非常重要。扩展是一组C语言函数、数据类型、操作符等,它们可以添加到PostgreSQL中以满足特定应用程序的需求。扩展可以动态加载和卸载,而无需重新启动数据库服务器。
安装PostgreSQL开发库 要开发PostgreSQL扩展,您需要安装PostgreSQL开发库。这些库包含了PostgreSQL的内部结构和函数,以及用于构建扩展的工具和头文件。在Debian/Ubuntu系统上,可以使用以下命令安装:
sudo apt-get install libpq-dev
在CentOS/RHEL系统上,可以使用以下命令安装:
sudo yum install postgresql-devel
创建一个新的扩展 要创建一个新的扩展,您需要创建一个目录,其中包含扩展的源代码和配置文件。以下是一个简单的示例:
mkdir my_extension
cd my_extension
mkdir -p my_extension/src
touch my_extension/my_extension.control
touch my_extension/src/my_extension.c
编写扩展的源代码
在my_extension/src/my_extension.c
文件中,编写您的C语言函数和数据类型。例如,以下代码定义了一个名为my_new_function
的新函数:
#include "postgres.h"
#include "utils/syscall.h"
PG_MODULE_MAGIC;
Datum my_new_function(PG_FUNCTION_ARGS) { // Your function implementation here }
PG_FUNCTION_INFO_V1(my_new_function);
5. 创建扩展的配置文件
在`my_extension`目录中创建一个名为`my_extension.control`的文件,其中包含有关扩展的信息。以下是一个简单的示例:
Name: my_extension Version: 1.0 Description: A simple example extension Author: Your Name License: PostgreSQL
Modules:
Dependencies:
6. 编译扩展
使用`pg_regress`工具编译和测试您的扩展。首先,安装`pg_regress`:
sudo apt-get install pg_regress
然后,运行以下命令以创建一个测试数据库并安装您的扩展:
pg_regress createdb my_test_db pg_regress initdb --db=my_test_db pg_regress test my_test_db
如果一切正常,您将在输出中看到类似于以下的成功消息:
test my_test_db Creating my_test_db Creating superuser connection Creating schema public Creating extension my_extension Creating table my_table Creating function my_new_function() Creating sequence my_sequence Creating trigger my_trigger Creating index my_index Creating operator family my_opfamily for access method hash Creating operator my_operator using my_opfamily Creating default value for my_column Creating check constraint my_check_constraint on my_table Creating foreign key constraint my_foreign_key_constraint on my_table Creating table my_table_copy Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_opfamily for access method hash in schema public Creating operator my_operator using my_opfamily in schema public Creating default value for my_column in schema public Creating check constraint my_check_constraint on my_table in schema public Creating foreign key constraint my_foreign_key_constraint on my_table in schema public Creating table my_table_copy in schema public Creating function my_new_function() in schema public Creating sequence my_sequence in schema public Creating trigger my_trigger in schema public Creating index my_index in schema public Creating operator family my_
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。