Patch for bug#21432 is reverted

include/mysql_com.h

@@ -26,9 +26,6 @@
 #define USERNAME_LENGTH 16
 #define SERVER_VERSION_LENGTH 60
 #define SQLSTATE_LENGTH 5
-#define SYSTEM_CHARSET_MBMAXLEN 3
-#define NAME_BYTE_LEN   NAME_LEN*SYSTEM_CHARSET_MBMAXLEN
-#define USERNAME_BYTE_LENGTH USERNAME_LENGTH*SYSTEM_CHARSET_MBMAXLEN
 
 #define LOCAL_HOST	"localhost"
 #define LOCAL_HOST_NAMEDPIPE "."

mysql-test/r/ctype_utf8.result

@@ -1340,15 +1340,3 @@ select a from t1 group by a;
 a
 e
 drop table t1;
-set names utf8;
-grant select on test.* to юзер_юзер@localhost;
-user()
-юзер_юзер@localhost
-revoke all on test.* from юзер_юзер@localhost;
-drop user юзер_юзер@localhost;
-create database имя_базы_в_кодировке_утф8_длиной_больше_чем_45;
-use имя_базы_в_кодировке_утф8_длиной_больше_чем_45;
-select database();
-database()
-имя_базы_в_кодировке_утф8_длиной_больше_чем_45
-drop database имя_базы_в_кодировке_утф8_длиной_больше_чем_45;

mysql-test/t/ctype_utf8.test

@@ -1072,20 +1072,4 @@ explain select a from t1 group by a;
 select a from t1 group by a;
 drop table t1;
 
-#
-# Bug#20393: User name truncation in mysql client
-# Bug#21432: Database/Table name limited to 64 bytes, not chars, problems with multi-byte
-#
-set names utf8;
-#create user юзер_юзер@localhost;
-grant select on test.* to юзер_юзер@localhost;
---exec $MYSQL --default-character-set=utf8 --user=юзер_юзер -e "select user()"
-revoke all on test.* from юзер_юзер@localhost;
-drop user юзер_юзер@localhost;
-
-create database имя_базы_в_кодировке_утф8_длиной_больше_чем_45;
-use имя_базы_в_кодировке_утф8_длиной_больше_чем_45;
-select database();
-drop database имя_базы_в_кодировке_утф8_длиной_больше_чем_45;
-
 # End of 4.1 tests

sql-common/client.c

@@ -1618,7 +1618,7 @@ CLI_MYSQL_REAL_CONNECT(MYSQL *mysql,const char *host, const char *user,
 		       const char *passwd, const char *db,
 		       uint port, const char *unix_socket,ulong client_flag)
 {
-  char		buff[NAME_BYTE_LEN+USERNAME_BYTE_LENGTH+100];
+  char		buff[NAME_LEN+USERNAME_LENGTH+100];
   char		*end,*host_info;
   my_socket	sock;
   in_addr_t	ip_addr;
@@ -2063,7 +2063,7 @@ CLI_MYSQL_REAL_CONNECT(MYSQL *mysql,const char *host, const char *user,
 		     mysql->server_status, client_flag));
   /* This needs to be changed as it's not useful with big packets */
   if (user && user[0])
-    strmake(end,user,USERNAME_BYTE_LENGTH);          /* Max user name */
+    strmake(end,user,USERNAME_LENGTH);          /* Max user name */
   else
     read_user_name((char*) end);
 
@@ -2093,7 +2093,7 @@ CLI_MYSQL_REAL_CONNECT(MYSQL *mysql,const char *host, const char *user,
   /* Add database if needed */
   if (db && (mysql->server_capabilities & CLIENT_CONNECT_WITH_DB))
   {
-    end= strmake(end, db, NAME_BYTE_LEN) + 1;
+    end= strmake(end, db, NAME_LEN) + 1;
     mysql->db= my_strdup(db,MYF(MY_WME));
     db= 0;
   }

sql/sql_acl.cc

@@ -2640,11 +2640,7 @@ int mysql_grant(THD *thd, const char *db, List <LEX_USER> &list,
   while ((Str = str_list++))
   {
     if (Str->host.length > HOSTNAME_LENGTH ||
-	system_charset_info->cset->charpos(system_charset_info,
-                                           Str->user.str,
-                                           Str->user.str +
-                                           Str->user.length,
-                                           USERNAME_LENGTH) < Str->user.length)
+	Str->user.length > USERNAME_LENGTH)
     {
       my_error(ER_GRANT_WRONG_HOST_OR_USER,MYF(0));
       result= -1;

sql/sql_parse.cc

@@ -902,8 +902,8 @@ static int check_connection(THD *thd)
   char *user= end;
   char *passwd= strend(user)+1;
   char *db= passwd;
-  char db_buff[NAME_BYTE_LEN + 1];              // buffer to store db in utf8
-  char user_buff[USERNAME_BYTE_LENGTH + 1];	// buffer to store user in utf8
+  char db_buff[NAME_LEN + 1];           // buffer to store db in utf8
+  char user_buff[USERNAME_LENGTH + 1];	// buffer to store user in utf8
   uint dummy_errors;
 
   /*

sql/table.cc

@@ -1413,7 +1413,7 @@ char *get_field(MEM_ROOT *mem, Field *field)
 
 bool check_db_name(char *name)
 {
-  uint name_length= 0;  // name length in symbols
+  char *start= name;
   /* Used to catch empty names and names with end space */
   bool last_char_is_space= TRUE;
 
@@ -1430,7 +1430,6 @@ bool check_db_name(char *name)
 		name+system_charset_info->mbmaxlen);
       if (len)
       {
-        name_length++;
         name += len;
         continue;
       }
@@ -1438,13 +1437,12 @@ bool check_db_name(char *name)
 #else
     last_char_is_space= *name==' ';
 #endif
-    name_length++;
     if (*name == '/' || *name == '\\' || *name == FN_LIBCHAR ||
 	*name == FN_EXTCHAR)
       return 1;
     name++;
   }
-  return (last_char_is_space || name_length > NAME_LEN);
+  return last_char_is_space || (uint) (name - start) > NAME_LEN;
 }