MYSQL_RES *
mysql_list_processes(MYSQL *mysql)
            mysql_list_processes() is deprecated and
            is subject to removal in a future version of MySQL. Instead,
            use mysql_real_query() or
            mysql_query() to execute a
            SHOW PROCESSLIST statement.
          
          Returns a result set describing the current server threads.
          This is the same kind of information as that reported by
          mysqladmin processlist or a
          SHOW PROCESSLIST query.
        
          You must free the result set with
          mysql_free_result().
        
- 
Commands were executed in an improper order. 
- 
The MySQL server has gone away. 
- 
The connection to the server was lost during the query. 
- 
An unknown error occurred.