windows mysql 启动,在Windows上的MySQL

在Windows上的MySQL - 应用软件 - 电脑教程网

在Windows上的MySQL

日期:2006-07-09   荐:
  曾以为Windows版本的MySQL存在不能使用UDF的BUG诸提交了一个bug报告。不过似乎发现是我搞错了,MySQL的技术支持人员给了非常完美的解答,同大家分享一下。下边是原文回复。    用户你好。抱歉,这并不是一个bug。下面我粘贴一个以前为某个客户做的简例,假设你有了VC ,源码分发,并且有一个正常运行的MySQL服务器。    我将创建一个UDF它将一个名字:    注意:例子非常简陋,目的是让你了解该如何处理手头的UDF。    - 打开 mysqld.dsw 工作区。    - 添加新项目到这个工作区    - Project name: my_udf // 项目名称:my_udf    - 选择 Win32 Dynamic-Link Library // Win32动态连接库    - 点击 OK    - 选择 An Empty DLL project // 一个空DLL项目    - 点击 Finish    - 点击 OK    - 添加新文件 my_udf.cpp 到项目中:    #include    #include    #include    extern "C" {    char *my_name(UDF_INIT *initid, UDF_ARGS *args, char *is_null,    char *error);    // 兼容C    }    char *my_name(UDF_INIT *initid, UDF_ARGS *args, char *is_null,    char *error)    {    char * me = "my name";    return me;    // 调用此UDF将返回 my name    }    - 按 Ctrl N 来创建一个新文件。    - 选择 text 类型    - File name: my_udf.def file://文件名:my_udf.def    - 按照下边的内容编辑文件。    LIBRARY UDF_EXAMPLE    DESCRIPTION 'Example Using UDF with VC '    VERSION 1.0    EXPORTS    my_name    - 右击my_udf项目并选择Settings    - 点 C/C 选项卡    - 选择 General    - 添加宏 HAVE_DLOPE 到预处理器定义    - 选择 Preprocessor    - 添加头文件路径: Additional Include directories    例如: ../include    - 按 F7 去编译成 DLL.    - 复制 my_udf.dll 到环境变量path定义过的目录    比如 \winnt\system32 。    - 打开mysql客户端    C:\mysql-udf\bin>mysql -uroot -p    Enter password:    Welcome to the MySQL monitor. Commands end with ; or \g.    Your MySQL connection id is 2 to server version: 3.23.52-max-nt    Type 'help;' or '\h' for help. Type '\c' to clear the buffer.    mysql> CREATE FUNCTION my_name RETURNS STRING SONAME "my_udf.dll";    Query OK, 0 rows affected (0.08 sec)    mysql> select my_name();    mysql> drop function my_name;    Query OK, 0 rows affected (0.00 sec)    以下是MySQL技术人员的回信原文:    Sorry this isn't a bug.    Below I pasted a sample I did sometime ago for another user:    Ok. Assuming you have VC and the source distribution and a server    running,    I will create a UDF that returns a name:    Note: the sample is ugly, but the purpose here is to show you how    to handle the UDF.    - Open the mysqld.dsw workspace.    - Add New project to the workspace    - Project name: my_udf    - Select Win32 Dynamic-Link Library    - Click OK    - Select An Empty DLL project    - Click Finish    - Click OK    - Add a new file called my_udf.cpp to the project:    #include    #include    #include    extern "C" {    char *my_name(UDF_INIT *initid, UDF_ARGS *args, char *is_null,    char *error);    }    char *my_name(UDF_INIT *initid, UDF_ARGS *args, char *is_null,    char *error)    {    char * me = "my name";    return me;    }    - Type Ctrl N for to create a new file.    - Select text type    - File name: my_udf.def    - Edit the above file with the below contents:    LIBRARY UDF_EXAMPLE    DESCRIPTION 'Example Using UDF with VC '    VERSION 1.0    EXPORTS    my_name    - Right Click the my_udf project and select Settings    - Click the C/C tab    - Select General in the Category Combo    - Add the macro HAVE_DLOPEN to the PreProcessor definition    - Select Preprocessor in the Category Combo    - Add the include path to the text box: Additional Include directories    e.g: ../include     - Press F7 for to build the DLL.    - Copy the my_udf.dll to the environment path directory:    \winnt\system32 for example.    - Start the mysql client and issue:    C:\mysql-udf\bin>mysql -uroot -p    Enter password:    Welcome to the MySQL monitor. Commands end with ; or \g.    Your MySQL connection id is 2 to server version: 3.23.52-max-nt    Type 'help;' or '\h' for help. Type '\c' to clear the buffer.    mysql> CREATE FUNCTION my_name RETURNS STRING SONAME "my_udf.dll";    Query OK, 0 rows affected (0.08 sec)    mysql> select my_name();    mysql> drop function my_name;    Query OK, 0 rows affected (0.00 sec)
标签: