MariaDB [(none)]> CHANGE MASTER TO master_host='orig_master', master_user='repl', master_password='password', master_log_file='localhost-bin.000002', master_log_pos=330;

Query OK, 0 rows affected (0.05 sec)

MariaDB [(none)]> SHOW SLAVE STATUS\G

*************************** 1. row ***************************

               Slave_IO_State: 

                  Master_Host: orig_master

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: localhost-bin.000002

          Read_Master_Log_Pos: 330

               Relay_Log_File: localhost-relay-bin.000001

                Relay_Log_Pos: 4

        Relay_Master_Log_File: localhost-bin.000002

             Slave_IO_Running: No

            Slave_SQL_Running: No

              Replicate_Do_DB: 

          Replicate_Ignore_DB: 

           Replicate_Do_Table: 

       Replicate_Ignore_Table: 

      Replicate_Wild_Do_Table: 

  Replicate_Wild_Ignore_Table: 

                   Last_Errno: 0

                   Last_Error: 

                 Skip_Counter: 0

          Exec_Master_Log_Pos: 330

              Relay_Log_Space: 248

              Until_Condition: None

               Until_Log_File: 

                Until_Log_Pos: 0

           Master_SSL_Allowed: No

           Master_SSL_CA_File: 

           Master_SSL_CA_Path: 

              Master_SSL_Cert: 

            Master_SSL_Cipher: 

               Master_SSL_Key: 

        Seconds_Behind_Master: NULL

Master_SSL_Verify_Server_Cert: No

                Last_IO_Errno: 0

                Last_IO_Error: 

               Last_SQL_Errno: 0

               Last_SQL_Error: 

  Replicate_Ignore_Server_Ids: 

             Master_Server_Id: 1

               Master_SSL_Crl: 

           Master_SSL_Crlpath: 

                   Using_Gtid: No

                  Gtid_IO_Pos: 

1 row in set (0.00 sec)

MariaDB [(none)]> SET @s := "CHANGE MASTER TO master_host='new_master', master_user='repl', master_password='password', master_log_file='localhost-bin.000002', master_log_pos=330";

Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> PREPARE st FROM @s;

Query OK, 0 rows affected (0.00 sec)

Statement prepared

MariaDB [(none)]> EXECUTE st;

Query OK, 0 rows affected (0.04 sec)

MariaDB [(none)]> DEALLOCATE PREPARE st;

Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> SHOW SLAVE STATUS\G

*************************** 1. row ***************************

               Slave_IO_State: 

                  Master_Host: orig_master

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: localhost-bin.000002

          Read_Master_Log_Pos: 330

               Relay_Log_File: localhost-relay-bin.000001

                Relay_Log_Pos: 4

        Relay_Master_Log_File: localhost-bin.000002

             Slave_IO_Running: No

            Slave_SQL_Running: No

              Replicate_Do_DB: 

          Replicate_Ignore_DB: 

           Replicate_Do_Table: 

       Replicate_Ignore_Table: 

      Replicate_Wild_Do_Table: 

  Replicate_Wild_Ignore_Table: 

                   Last_Errno: 0

                   Last_Error: 

                 Skip_Counter: 0

          Exec_Master_Log_Pos: 330

              Relay_Log_Space: 248

              Until_Condition: None

               Until_Log_File: 

                Until_Log_Pos: 0

           Master_SSL_Allowed: No

           Master_SSL_CA_File: 

           Master_SSL_CA_Path: 

              Master_SSL_Cert: 

            Master_SSL_Cipher: 

               Master_SSL_Key: 

        Seconds_Behind_Master: NULL

Master_SSL_Verify_Server_Cert: No

                Last_IO_Errno: 0

                Last_IO_Error: 

               Last_SQL_Errno: 0

               Last_SQL_Error: 

  Replicate_Ignore_Server_Ids: 

             Master_Server_Id: 1

               Master_SSL_Crl: 

           Master_SSL_Crlpath: 

                   Using_Gtid: No

                  Gtid_IO_Pos: 

1 row in set (0.00 sec)

150226  9:21:48 [Note] 'CHANGE MASTER TO executed'. Previous state master_host='orig_master', master_port='3306', master_log_file='localhost-bin.000002', master_log_pos='330'. New state master_host='orig_master', master_port='3306', master_log_file='localhost-bin.000002', master_log_pos='330'.