diff --git a/mysql-test/r/ctype_utf8.result b/mysql-test/r/ctype_utf8.result
index 33080d23ade..f2f425c8107 100644
--- a/mysql-test/r/ctype_utf8.result
+++ b/mysql-test/r/ctype_utf8.result
@@ -10459,5 +10459,81 @@ HEX(a)
 613F
 DROP TABLE t1;
 #
+# MDEV-10134 Add full support for DEFAULT
+#
+SET NAMES latin1;
+CREATE TABLE t1 (a VARCHAR(30) CHARACTER SET latin1 DEFAULT CONCAT('ß'));
+SET NAMES utf8;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(30) DEFAULT CONCAT('ß')
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+INSERT INTO t1 VALUES (DEFAULT);
+SELECT HEX(a),a  FROM t1;
+HEX(a)	a
+C39F	ß
+SET NAMES latin1;
+ALTER TABLE t1 ADD b VARCHAR(30) CHARACTER SET latin1 DEFAULT CONCAT('ß');
+SET NAMES utf8;
+ALTER TABLE t1 ADD c VARCHAR(30) CHARACTER SET latin1 DEFAULT CONCAT('ß');
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(30) DEFAULT CONCAT('ß'),
+  `b` varchar(30) DEFAULT CONCAT('ß'),
+  `c` varchar(30) DEFAULT CONCAT('ß')
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+DELETE FROM t1;
+INSERT INTO t1 VALUES();
+SELECT * FROM t1;
+a	b	c
+ß	ß	ß
+SET NAMES latin1;
+DELETE FROM t1;
+INSERT INTO t1 VALUES();
+SET NAMES utf8;
+SELECT * FROM t1;
+a	b	c
+ß	ß	ß
+DROP TABLE t1;
+SET NAMES latin1;
+CREATE TABLE t1 (a VARCHAR(30) CHARACTER SET utf8 DEFAULT CONCAT('ß'));
+SET NAMES utf8;
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(30) CHARACTER SET utf8 DEFAULT CONCAT('ß')
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+INSERT INTO t1 VALUES (DEFAULT);
+SELECT HEX(a), a FROM t1;
+HEX(a)	a
+C383C5B8	ß
+DROP TABLE t1;
+SET NAMES utf8;
+CREATE TABLE t1 (a VARCHAR(30) CHARACTER SET latin1 DEFAULT CONCAT('ß'));
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(30) DEFAULT CONCAT('ß')
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+INSERT INTO t1 VALUES (DEFAULT);
+SELECT HEX(a) FROM t1;
+HEX(a)
+DF
+DROP TABLE t1;
+SET NAMES utf8;
+CREATE TABLE t1 (a VARCHAR(30) CHARACTER SET utf8 DEFAULT CONCAT('ß'));
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(30) CHARACTER SET utf8 DEFAULT CONCAT('ß')
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+INSERT INTO t1 VALUES (DEFAULT);
+SELECT HEX(a) FROM t1;
+HEX(a)
+C39F
+DROP TABLE t1;
+#
 # End of 10.2 tests
 #
diff --git a/mysql-test/t/ctype_utf8.test b/mysql-test/t/ctype_utf8.test
index 61bc1c58ecb..1ad6f02f607 100644
--- a/mysql-test/t/ctype_utf8.test
+++ b/mysql-test/t/ctype_utf8.test
@@ -1982,6 +1982,60 @@ LOAD XML INFILE '../../std_data/loaddata/mdev9874.xml' INTO TABLE t1 CHARACTER S
 SELECT HEX(a) FROM t1;
 DROP TABLE t1;
 
+--echo #
+--echo # MDEV-10134 Add full support for DEFAULT
+--echo #
+
+# This test uses some magic codes:
+# _latin1 0xC39F is "A WITH TILDE + Y WITH DIAERESIS"
+# _utf8   0xC39F is "SHARP S"
+
+# "A WITH TILDE + Y WITH DIAERESIS" in DEFAULT.
+SET NAMES latin1;
+CREATE TABLE t1 (a VARCHAR(30) CHARACTER SET latin1 DEFAULT CONCAT('ß'));
+SET NAMES utf8;
+SHOW CREATE TABLE t1;
+INSERT INTO t1 VALUES (DEFAULT);
+SELECT HEX(a),a  FROM t1;
+SET NAMES latin1;
+ALTER TABLE t1 ADD b VARCHAR(30) CHARACTER SET latin1 DEFAULT CONCAT('ß');
+SET NAMES utf8;
+ALTER TABLE t1 ADD c VARCHAR(30) CHARACTER SET latin1 DEFAULT CONCAT('ß');
+SHOW CREATE TABLE t1;
+# Testing that DEFAULT is independent on the current "SET NAMES".
+DELETE FROM t1;
+INSERT INTO t1 VALUES();
+SELECT * FROM t1;
+SET NAMES latin1;
+DELETE FROM t1;
+INSERT INTO t1 VALUES();
+SET NAMES utf8;
+SELECT * FROM t1;
+DROP TABLE t1;
+
+SET NAMES latin1;
+CREATE TABLE t1 (a VARCHAR(30) CHARACTER SET utf8 DEFAULT CONCAT('ß'));
+SET NAMES utf8;
+SHOW CREATE TABLE t1;
+INSERT INTO t1 VALUES (DEFAULT);
+SELECT HEX(a), a FROM t1;
+DROP TABLE t1;
+
+# "SHARP S" in DEFAULT
+SET NAMES utf8;
+CREATE TABLE t1 (a VARCHAR(30) CHARACTER SET latin1 DEFAULT CONCAT('ß'));
+SHOW CREATE TABLE t1;
+INSERT INTO t1 VALUES (DEFAULT);
+SELECT HEX(a) FROM t1;
+DROP TABLE t1;
+
+SET NAMES utf8;
+CREATE TABLE t1 (a VARCHAR(30) CHARACTER SET utf8 DEFAULT CONCAT('ß'));
+SHOW CREATE TABLE t1;
+INSERT INTO t1 VALUES (DEFAULT);
+SELECT HEX(a) FROM t1;
+DROP TABLE t1;
+
 --echo #
 --echo # End of 10.2 tests
 --echo #
diff --git a/sql/set_var.cc b/sql/set_var.cc
index 5392a0065ac..b178681e952 100644
--- a/sql/set_var.cc
+++ b/sql/set_var.cc
@@ -966,10 +966,8 @@ int set_var_collation_client::check(THD *thd)
 
 int set_var_collation_client::update(THD *thd)
 {
-  thd->variables.character_set_client= character_set_client;
-  thd->variables.character_set_results= character_set_results;
-  thd->variables.collation_connection= collation_connection;
-  thd->update_charset();
+  thd->update_charset(character_set_client, collation_connection,
+                      character_set_results);
   thd->protocol_text.init(thd);
   thd->protocol_binary.init(thd);
   return 0;
diff --git a/sql/slave.cc b/sql/slave.cc
index f02ef5e036b..27825c431d3 100644
--- a/sql/slave.cc
+++ b/sql/slave.cc
@@ -3024,13 +3024,10 @@ void set_slave_thread_default_charset(THD* thd, rpl_group_info *rgi)
 {
   DBUG_ENTER("set_slave_thread_default_charset");
 
-  thd->variables.character_set_client=
-    global_system_variables.character_set_client;
-  thd->variables.collation_connection=
-    global_system_variables.collation_connection;
   thd->variables.collation_server=
     global_system_variables.collation_server;
-  thd->update_charset();
+  thd->update_charset(global_system_variables.character_set_client,
+                      global_system_variables.collation_connection);
 
   thd->system_thread_info.rpl_sql_info->cached_charset_invalidate();
   DBUG_VOID_RETURN;
diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc
index 91f337fa713..fde894c0cf6 100644
--- a/sql/sql_acl.cc
+++ b/sql/sql_acl.cc
@@ -11774,7 +11774,6 @@ static bool parse_com_change_user_packet(MPVIO_EXT *mpvio, uint packet_length)
   {
     if (thd_init_client_charset(thd, uint2korr(next_field)))
       DBUG_RETURN(1);
-    thd->update_charset();
     next_field+= 2;
   }
 
@@ -11940,7 +11939,6 @@ static ulong parse_client_handshake_packet(MPVIO_EXT *mpvio,
     DBUG_PRINT("info", ("client_character_set: %d", (uint) net->read_pos[8]));
     if (thd_init_client_charset(thd, (uint) net->read_pos[8]))
       return packet_error;
-    thd->update_charset();
     end= (char*) net->read_pos+32;
   }
   else
diff --git a/sql/sql_class.h b/sql/sql_class.h
index 1cd09bf44fb..20af4ea243a 100644
--- a/sql/sql_class.h
+++ b/sql/sql_class.h
@@ -3417,6 +3417,22 @@ public:
 
   inline CHARSET_INFO *charset() { return variables.character_set_client; }
   void update_charset();
+  void update_charset(CHARSET_INFO *character_set_client,
+                      CHARSET_INFO *collation_connection)
+  {
+    variables.character_set_client= character_set_client;
+    variables.collation_connection= collation_connection;
+    update_charset();
+  }
+  void update_charset(CHARSET_INFO *character_set_client,
+                      CHARSET_INFO *collation_connection,
+                      CHARSET_INFO *character_set_results)
+  {
+    variables.character_set_client= character_set_client;
+    variables.collation_connection= collation_connection;
+    variables.character_set_results= character_set_results;
+    update_charset();
+  }
 
   inline Query_arena *activate_stmt_arena_if_needed(Query_arena *backup)
   {
diff --git a/sql/sql_connect.cc b/sql/sql_connect.cc
index 625f40a7ff8..7869f7f540c 100644
--- a/sql/sql_connect.cc
+++ b/sql/sql_connect.cc
@@ -799,12 +799,9 @@ bool thd_init_client_charset(THD *thd, uint cs_number)
   if (!opt_character_set_client_handshake ||
       !(cs= get_charset(cs_number, MYF(0))))
   {
-    thd->variables.character_set_client=
-      global_system_variables.character_set_client;
-    thd->variables.collation_connection=
-      global_system_variables.collation_connection;
-    thd->variables.character_set_results=
-      global_system_variables.character_set_results;
+    thd->update_charset(global_system_variables.character_set_client,
+                        global_system_variables.collation_connection,
+                        global_system_variables.character_set_results);
   }
   else
   {
@@ -814,10 +811,8 @@ bool thd_init_client_charset(THD *thd, uint cs_number)
       my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), "character_set_client",
                cs->csname);
       return true;
-    }    
-    thd->variables.character_set_results=
-      thd->variables.collation_connection= 
-      thd->variables.character_set_client= cs;
+    }
+    thd->update_charset(cs,cs,cs);
   }
   return false;
 }
diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc
index 8b3d50e40e4..63b44c53f94 100644
--- a/sql/sql_parse.cc
+++ b/sql/sql_parse.cc
@@ -1710,10 +1710,8 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
 	decrease_user_connections(thd->user_connect);
       thd->user_connect= save_user_connect;
       thd->reset_db(save_db, save_db_length);
-      thd->variables.character_set_client= save_character_set_client;
-      thd->variables.collation_connection= save_collation_connection;
-      thd->variables.character_set_results= save_character_set_results;
-      thd->update_charset();
+      thd->update_charset(save_character_set_client, save_collation_connection,
+                          save_character_set_results);
       thd->failed_com_change_user++;
       my_sleep(1000000);
     }
diff --git a/sql/table.cc b/sql/table.cc
index 30e4d3c2517..ef30e2bf529 100644
--- a/sql/table.cc
+++ b/sql/table.cc
@@ -126,10 +126,7 @@ Default_object_creation_ctx::create_backup_ctx(THD *thd) const
 
 void Default_object_creation_ctx::change_env(THD *thd) const
 {
-  thd->variables.character_set_client= m_client_cs;
-  thd->variables.collation_connection= m_connection_cl;
-
-  thd->update_charset();
+  thd->update_charset(m_client_cs, m_connection_cl);
 }
 
 /**************************************************************************