Fix for bug#3950: Check/Repair caused by "Field List" doesn't show table name in processlist

sql/ha_myisam.cc

@@ -1013,7 +1013,15 @@ bool ha_myisam::check_and_repair(THD *thd)
   if (!file->state->del && (myisam_recover_options & HA_RECOVER_QUICK))
     check_opt.flags|=T_QUICK;
   sql_print_error("Warning: Checking table:   '%s'",table->path);
-  if ((marked_crashed=mi_is_crashed(file)) || check(thd, &check_opt))
+  if ((marked_crashed=mi_is_crashed(file)))
+  {
+    char *old_query= thd->query;
+    uint old_query_length= thd->query_length;
+    pthread_mutex_lock(&LOCK_thread_count);
+    thd->query= table->real_name;
+    thd->query_length= strlen(table->real_name);
+    pthread_mutex_unlock(&LOCK_thread_count);
+    if (check(thd, &check_opt))
     {
       sql_print_error("Warning: Recovering table: '%s'",table->path);
       check_opt.flags=
@@ -1024,6 +1032,11 @@ bool ha_myisam::check_and_repair(THD *thd)
       if (repair(thd, &check_opt))
         error=1;
     }
+    pthread_mutex_lock(&LOCK_thread_count);
+    thd->query= old_query;
+    thd->query_length= old_query_length;
+    pthread_mutex_unlock(&LOCK_thread_count);
+  }
   DBUG_RETURN(error);
 }