TABLE slave_relay_log_info ADD Privilege_checks_username CHAR(32) COLLATE utf8mb3_bin DEFAULT NULL COMMENT 'Username part of PRIVILEGE_CHECKS_USER.' AFTER Channel_name,
                                 ADD Privilege_checks_hostname CHAR(255) CHARACTER SET ascii COLLATE ascii_general_ci DEFAULT NULL COMMENT 'Hostname part of PRIVILEGE_CHECKS_USER.' AFTER Privilege_checks_username;