SHOW CREATE TABLE didn't display field names in the proper charset

mysys/charset.c:
  Clear all fields at the end of previous charset

mysql-test/r/ctype_recoding.result

+SET NAMES koi8r;
+DROP TABLE IF EXISTS ;
+CREATE TABLE  
+(
+ CHAR(32) CHARACTER SET koi8r NOT NULL
+);
+SHOW TABLES;
+Tables_in_test
+
+SHOW CREATE TABLE ;
+Table	Create Table
+	CREATE TABLE `` (
+  `` char(32) character set koi8r NOT NULL default ''
+) TYPE=MyISAM CHARSET=latin1
+SHOW FIELDS FROM ;
+Field	Type	Collation	Null	Key	Default	Extra
+	char(32) character set koi8r	koi8r				
+SET NAMES cp1251;
+SHOW TABLES;
+Tables_in_test
+
+SHOW CREATE TABLE ;
+Table	Create Table
+	CREATE TABLE `` (
+  `` char(32) character set koi8r NOT NULL default ''
+) TYPE=MyISAM CHARSET=latin1
+SHOW FIELDS FROM ;
+Field	Type	Collation	Null	Key	Default	Extra
+	char(32) character set koi8r	koi8r				
+SET NAMES utf8;
+SHOW TABLES;
+Tables_in_test
+таблица
+SHOW CREATE TABLE таблица;
+Table	Create Table
+таблица	CREATE TABLE `таблица` (
+  `поле` char(32) character set koi8r NOT NULL default ''
+) TYPE=MyISAM CHARSET=latin1
+SHOW FIELDS FROM таблица;
+Field	Type	Collation	Null	Key	Default	Extra
+поле	char(32) character set koi8r	koi8r				
+SET NAMES koi8r;
+DROP TABLE ;

mysql-test/t/ctype_recoding.test

+SET NAMES koi8r;
+
+--disable_warnings
+DROP TABLE IF EXISTS ;
+--enable_warnings
+
+CREATE TABLE  
+(
+   CHAR(32) CHARACTER SET koi8r NOT NULL
+);
+
+SHOW TABLES;
+SHOW CREATE TABLE ;
+SHOW FIELDS FROM ;
+
+SET NAMES cp1251;
+SHOW TABLES;
+SHOW CREATE TABLE ;
+SHOW FIELDS FROM ;
+
+
+SET NAMES utf8;
+SHOW TABLES;
+SHOW CREATE TABLE таблица;
+SHOW FIELDS FROM таблица;
+
+SET NAMES koi8r;
+DROP TABLE ;

mysys/charset.c

@@ -341,6 +341,8 @@ static int add_collation(CHARSET_INFO *cs)
       all_charsets[cs->number]->state |= cs->state;
     }
     cs->number= 0;
+    cs->primary_number= 0;
+    cs->binary_number= 0;
     cs->name= NULL;
     cs->state= 0;
     cs->sort_order= NULL;

sql/sql_show.cc

@@ -1014,12 +1014,12 @@ append_identifier(THD *thd, String *packet, const char *name)
   if (thd->options & OPTION_QUOTE_SHOW_CREATE)
   {
     packet->append(&qtype, 1);
-    packet->append(name);
+    packet->append(name, 0, system_charset_info);
     packet->append(&qtype, 1);
   }
   else
   {
-    packet->append(name);
+    packet->append(name, 0, system_charset_info);
   }
 }
 

sql/sql_string.cc

@@ -338,6 +338,34 @@ bool String::append(const char *s,uint32 arg_length)
 }
 
 
+/*
+  Append a string in the given charset to the string
+  with character set recoding
+*/
+
+
+bool String::append(const char *s,uint32 arg_length, CHARSET_INFO *cs)
+{
+  if (!arg_length)				// Default argument
+    if (!(arg_length= (uint32) strlen(s)))
+      return FALSE;
+  if (str_charset->mbmaxlen > 1)
+  {
+    uint32 add_length=arg_length * str_charset->mbmaxlen;
+    if (realloc(str_length+ add_length))
+      return TRUE;
+    str_length+= copy_and_convert(Ptr+str_length, add_length, str_charset,
+				  s, arg_length, cs);
+    return FALSE;
+  }
+  if (realloc(str_length+arg_length))
+    return TRUE;
+  memcpy(Ptr+str_length,s,arg_length);
+  str_length+=arg_length;
+  return FALSE;
+}
+
+
 #ifdef TO_BE_REMOVED
 bool String::append(FILE* file, uint32 arg_length, myf my_flags)
 {

sql/sql_string.h

@@ -181,6 +181,7 @@ public:
 	    CHARSET_INFO *csto);
   bool append(const String &s);
   bool append(const char *s,uint32 arg_length=0);
+  bool append(const char *s,uint32 arg_length, CHARSET_INFO *cs);
   bool append(IO_CACHE* file, uint32 arg_length);
   int strstr(const String &search,uint32 offset=0); // Returns offset to substring or -1
   int strstr_case(const String &s,uint32 offset=0);