Mysql function sys_eval does not exists

To install and enable the sys calls in MariaDB and Mysql with newer Versions you have to copy a plugin into the mysql plugin folder:

On a Linux Server copy the plugin in the mysql plugin directory /usr/lib/mysql/plugin/lib_mysqludf_sys.so and install it on a mysql bash

CREATE FUNCTION lib_mysqludf_sys_info RETURNS string SONAME 'lib_mysqludf_sys.so';
CREATE FUNCTION sys_get RETURNS string SONAME 'lib_mysqludf_sys.so';
CREATE FUNCTION sys_set RETURNS int SONAME 'lib_mysqludf_sys.so';
CREATE FUNCTION sys_exec RETURNS int SONAME 'lib_mysqludf_sys.so';
CREATE FUNCTION sys_eval RETURNS string SONAME 'lib_mysqludf_sys.so';

lib_mysqludf_sys.so

after this you can test it with sql statements like this (when curl is installed, otherwise apt get update and apt get install curl on ubuntu)

SELECT sys_eval('curl https://app-web-entwicklung.de');