今天,碰巧有人问,说写的代码server_init,老是失败,我不信,试了一番,大费周折,总算成功。
有兴趣的,不妨自己动手一试,蛮有意思的。
我机器上原本有一个解压缩版的MySQL5.0.9,位于D:/program/mysql-5.0.9-beta-win32,默认存储引擎是InnoDB
1. 为便于测试,首先建立一个测试表,并插入几条记录,引擎定为MyISAM
create table t2(id int primary key, col2 varchar(32)) engine=MyISAM;
2. 创建Embed Server的配置文件,
D:/program/mysql-5.0.9-beta-win32/Embedded/my.ini,值得一提的是,差点把我害惨了,就是Server那一项的名字必须与你的Server程序的名字保持一致。这里,EmbedMySQLServer就是我后边的exe程序的名,否则server永远也启不来。
内容如下:
[EmbedMySQLServer] basedir = D:/program/mysql-5.0.9-beta-win32 datadir = D:/program/mysql-5.0.9-beta-win32/data language = D:/program/mysql-5.0.9-beta-win32/share/english skip-innodb port=3306 [libmysqld_client] language = D:/program/mysql-5.0.9-beta-win32/share/english port=3306
3. 开始写自己的代码了
create EmbedMySQLServer.exe, source code like:
// #define _WIN32_WINNT 0x0400 #include <windows.h> #include <stdio.h> #include <stdlib.h> #include <stdarg.h> #include "mysql.h" MYSQL *mysql; MYSQL_RES *results; MYSQL_ROW record; #pragma comment(lib, "D://program//mysql-5.0.9-beta-win32//Embedded//DLL//debug//libmysqld.lib") static char *server_options[] = { "mysql_test", "--defaults-file=D:/program/mysql-5.0.9-beta-win32/Embedded/my.ini" }; int num_elements = sizeof(server_options)/ sizeof(char *); static char *server_groups[] = { "EmbedMySQLServer", "libmysqld_client" }; int main(void) { int ret = mysql_server_init(num_elements, server_options, server_groups); printf("return %ld/n", ret); mysql = mysql_init(NULL); mysql_options(mysql, MYSQL_READ_DEFAULT_GROUP, "libmysqld_client"); mysql_options(mysql, MYSQL_OPT_USE_EMBEDDED_CONNECTION, NULL); MYSQL* t = mysql_real_connect(mysql, NULL,"test","test", "test", 0,NULL,0); mysql_query(mysql, "SELECT id, col2 FROM t2"); results = mysql_store_result(mysql); while((record = mysql_fetch_row(results))) { printf("%s - %s /n", record[0], record[1]); } mysql_free_result(results); mysql_close(mysql); mysql_server_end(); return 0; }
4. 最终运行结果:
return 0 1 - test 2 - test 3 - test 4 - test 5 - fdas Press any key to continue
像这类东东,MySQL Online Doc都没好好说,它都推荐买它的商业license,看来自己多动动手,也蛮有意思的。