*** sql/log.cc.orig     2015-11-30 04:16:24.000000000 +0900
--- sql/log.cc  2016-01-07 15:44:00.027000096 +0900
***************
*** 681,686 ****
--- 681,689 ----
    if (my_b_write(&log_file, (uchar*) local_time_buff, time_buff_len))
      goto err;

+   if (my_b_write(&log_file, (uchar*) "\t", 1))
+     goto err;
+
    length= my_snprintf(buff, 32, "%5u ", thread_id);

    if (my_b_write(&log_file, (uchar*) buff, length))