Index: mysql-test/r/mysqlcheck.result
===================================================================
--- mysql-test/r/mysqlcheck.result	(revision 1)
+++ mysql-test/r/mysqlcheck.result	(working copy)
@@ -158,6 +158,9 @@
 test.t 1                                           OK
 test.t`1                                           OK
 drop table `t``1`, `t 1`;
+create table `t.1`(a int) engine=myisam;
+test.t.1                                           OK
+drop table `t.1`;
 create database d_bug25347;
 use d_bug25347;
 create table t_bug25347 (a int) engine=myisam;
Index: mysql-test/t/mysqlcheck.test
===================================================================
--- mysql-test/t/mysqlcheck.test	(revision 1)
+++ mysql-test/t/mysqlcheck.test	(working copy)
@@ -57,6 +57,14 @@
 drop table `t``1`, `t 1`;
 
 #
+# Bug #68015: mysqlcheck fails during upgrade of tables whose names include dot 
+#
+create table `t.1`(a int) engine=myisam;
+--replace_result 'Table is already up to date' OK
+--exec $MYSQL_CHECK --databases test -a
+drop table `t.1`;
+
+#
 # Bug#25347: mysqlcheck -A -r doesn't repair table marked as crashed
 #
 create database d_bug25347;
Index: client/mysqlcheck.c
===================================================================
--- client/mysqlcheck.c	(revision 1)
+++ client/mysqlcheck.c	(working copy)
@@ -224,6 +224,7 @@
 static void print_result();
 static uint fixed_name_length(const char *name);
 static char *fix_table_name(char *dest, char *src);
+static char *fix_pure_table_name(char *dest, char *src);
 int what_to_do = 0;
 
 
@@ -537,6 +538,18 @@
   return dest;
 }
 
+static char *fix_pure_table_name(char *dest, char *src)
+{
+  *dest++= '`';
+  for (; *src; src++)
+  {
+    if (*src == '`')
+      *dest++= '`';
+    *dest++= *src;
+  }
+  *dest++= '`';
+  return dest;
+}
 
 static int process_all_tables_in_db(char *database)
 {
@@ -755,7 +768,9 @@
     char *ptr;
 
     ptr= strmov(strmov(query, op), " TABLE ");
-    ptr= fix_table_name(ptr, tables);
+
+    ptr= fix_pure_table_name(ptr, tables);
+
     ptr= strxmov(ptr, " ", options, NullS);
     query_length= (uint) (ptr - query);
   }
@@ -804,10 +819,10 @@
           if (prev_alter[0])
             insert_dynamic(&alter_table_cmds, (uchar*) prev_alter);
           else
-            insert_dynamic(&tables4rebuild, (uchar*) prev);
+            insert_dynamic(&tables4rebuild, (uchar*) ((strchr(prev, '.') + 1)));
         }
         else
-          insert_dynamic(&tables4repair, prev);
+          insert_dynamic(&tables4repair, ((strchr(prev, '.') + 1)));
       }
       found_error=0;
       table_rebuild=0;
@@ -859,10 +874,10 @@
       if (prev_alter[0])
         insert_dynamic(&alter_table_cmds, (uchar*) prev_alter);
       else
-        insert_dynamic(&tables4rebuild, (uchar*) prev);
+        insert_dynamic(&tables4rebuild, (uchar*) ((strchr(prev, '.') + 1)));
     }
     else
-      insert_dynamic(&tables4repair, prev);
+      insert_dynamic(&tables4repair, ((strchr(prev, '.') + 1)));
   }
   mysql_free_result(res);
 }