MYSQL_OPT_CONNECT_ATTR_ADD 1111 ext/mysqlnd/mysqlnd.c 		mysqlnd_options4(conn_handle, MYSQL_OPT_CONNECT_ATTR_ADD, "_client_name", "mysqlnd");
MYSQL_OPT_CONNECT_ATTR_ADD 2502 ext/mysqlnd/mysqlnd.c 		case MYSQL_OPT_CONNECT_ATTR_ADD: