Merge spetrunia@bk-internal.mysql.com:/home/bk/mysql-4.1

into mysql.com:/dbdata/psergey/mysql-4.1-bug-psnames


sql/sql_class.cc:
  Auto merged

client/mysql.cc

@@ -607,7 +607,7 @@ static struct my_option my_long_options[] =
   {"silent", 's', "Be more silent. Print results with a tab as separator, each row on new line.", 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0,
    0, 0},
 #ifdef HAVE_SMEM
-  {"shared_memory_base_name", OPT_SHARED_MEMORY_BASE_NAME,
+  {"shared-memory-base-name", OPT_SHARED_MEMORY_BASE_NAME,
    "Base name of shared memory.", (gptr*) &shared_memory_base_name, (gptr*) &shared_memory_base_name, 
    0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #endif

client/mysqladmin.c

@@ -151,7 +151,7 @@ static struct my_option my_long_options[] =
    "Change the value of a variable. Please note that this option is deprecated; you can set variables directly with --variable-name=value.",
    0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #ifdef HAVE_SMEM
-  {"shared_memory_base_name", OPT_SHARED_MEMORY_BASE_NAME,
+  {"shared-memory-base-name", OPT_SHARED_MEMORY_BASE_NAME,
    "Base name of shared memory.", (gptr*) &shared_memory_base_name, (gptr*) &shared_memory_base_name,
    0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #endif

client/mysqlcheck.c

@@ -125,7 +125,7 @@ static struct my_option my_long_options[] =
    "Can fix almost anything except unique keys that aren't unique.",
    0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
 #ifdef HAVE_SMEM
-  {"shared_memory_base_name", OPT_SHARED_MEMORY_BASE_NAME,
+  {"shared-memory-base-name", OPT_SHARED_MEMORY_BASE_NAME,
    "Base name of shared memory.", (gptr*) &shared_memory_base_name, (gptr*) &shared_memory_base_name,
    0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #endif

client/mysqldump.c

@@ -276,7 +276,7 @@ static struct my_option my_long_options[] =
    "Direct output to a given file. This option should be used in MSDOS, because it prevents new line '\\n' from being converted to '\\r\\n' (carriage return + line feed).",
    0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #ifdef HAVE_SMEM
-  {"shared_memory_base_name", OPT_SHARED_MEMORY_BASE_NAME,
+  {"shared-memory-base-name", OPT_SHARED_MEMORY_BASE_NAME,
    "Base name of shared memory.", (gptr*) &shared_memory_base_name, (gptr*) &shared_memory_base_name,
    0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #endif

client/mysqlimport.c

@@ -123,7 +123,7 @@ static struct my_option my_long_options[] =
   {"replace", 'r', "If duplicate unique key was found, replace old row.",
    (gptr*) &replace, (gptr*) &replace, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
 #ifdef HAVE_SMEM
-  {"shared_memory_base_name", OPT_SHARED_MEMORY_BASE_NAME,
+  {"shared-memory-base-name", OPT_SHARED_MEMORY_BASE_NAME,
    "Base name of shared memory.", (gptr*) &shared_memory_base_name, (gptr*) &shared_memory_base_name,
    0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #endif

client/mysqlshow.c

@@ -188,7 +188,7 @@ static struct my_option my_long_options[] =
   {"protocol", OPT_MYSQL_PROTOCOL, "The protocol of connection (tcp,socket,pipe,memory).",
    0, 0, 0, GET_STR,  REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #ifdef HAVE_SMEM
-  {"shared_memory_base_name", OPT_SHARED_MEMORY_BASE_NAME,
+  {"shared-memory-base-name", OPT_SHARED_MEMORY_BASE_NAME,
    "Base name of shared memory.", (gptr*) &shared_memory_base_name, (gptr*) &shared_memory_base_name,
    0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
 #endif

configure.in

@@ -972,8 +972,8 @@ MAX_CXX_OPTIMIZE="-O3"
 # workaround for Sun Forte/x86 see BUG#4681
 case $SYSTEM_TYPE-$MACHINE_TYPE-$ac_cv_prog_gcc in
   *solaris*-i?86-no)
-    CFLAGS="$CFLAGS -DBIG_FILES"
-    CXXFLAGS="$CXXFLAGS -DBIG_FILES"
+    CFLAGS="$CFLAGS -DBIG_TABLES"
+    CXXFLAGS="$CXXFLAGS -DBIG_TABLES"
     ;;
   *) ;;
 esac
@@ -2402,7 +2402,7 @@ dnl you must also create strings/ctype-$charset_name.c
 AC_DIVERT_PUSH(0)
 
 define(CHARSETS_AVAILABLE0,binary)
-define(CHARSETS_AVAILABLE1,ascii armscii8 ascii big5 cp1250 cp1251 cp1256 cp1257)
+define(CHARSETS_AVAILABLE1,armscii8 ascii big5 cp1250 cp1251 cp1256 cp1257)
 define(CHARSETS_AVAILABLE2,cp850 cp852 cp866 dec8 euckr gb2312 gbk geostd8)
 define(CHARSETS_AVAILABLE3,greek hebrew hp8 keybcs2 koi8r koi8u)
 define(CHARSETS_AVAILABLE4,latin1 latin2 latin5 latin7 macce macroman)

myisam/ftdefs.h

@@ -27,7 +27,7 @@
 #define misc_word_char(X)	((X)=='\'')
 #define word_char(s,X)		(true_word_char(s,X) || misc_word_char(X))
 
-#define FT_MAX_WORD_LEN_FOR_SORT 20
+#define FT_MAX_WORD_LEN_FOR_SORT 31
 
 #define COMPILE_STOPWORDS_IN
 

myisam/mi_check.c

@@ -2020,12 +2020,14 @@ int mi_repair_by_sort(MI_CHECK *param, register MI_INFO *info,
 
     if (sort_param.keyinfo->flag & HA_FULLTEXT)
     {
+      uint ft_max_word_len_for_sort=FT_MAX_WORD_LEN_FOR_SORT*
+                                    sort_param.keyinfo->seg->charset->mbmaxlen;
       sort_info.max_records=
-        (ha_rows) (sort_info.filelength/FT_MAX_WORD_LEN_FOR_SORT+1);
+        (ha_rows) (sort_info.filelength/ft_max_word_len_for_sort+1);
 
       sort_param.key_read=sort_ft_key_read;
       sort_param.key_write=sort_ft_key_write;
-      sort_param.key_length+=FT_MAX_WORD_LEN_FOR_SORT-HA_FT_MAXBYTELEN;
+      sort_param.key_length+=ft_max_word_len_for_sort-HA_FT_MAXBYTELEN;
     }
     else
     {
@@ -2425,7 +2427,11 @@ int mi_repair_parallel(MI_CHECK *param, register MI_INFO *info,
     total_key_length+=sort_param[i].key_length;
 
     if (sort_param[i].keyinfo->flag & HA_FULLTEXT)
-      sort_param[i].key_length+=FT_MAX_WORD_LEN_FOR_SORT-HA_FT_MAXBYTELEN;
+    {
+      uint ft_max_word_len_for_sort=FT_MAX_WORD_LEN_FOR_SORT*
+                                    sort_param[i].keyinfo->seg->charset->mbmaxlen;
+      sort_param[i].key_length+=ft_max_word_len_for_sort-HA_FT_MAXBYTELEN;
+    }
   }
   sort_info.total_keys=i;
   sort_param[0].master= 1;
@@ -2634,7 +2640,6 @@ static int sort_key_read(MI_SORT_PARAM *sort_param, void *key)
   DBUG_RETURN(sort_write_record(sort_param));
 } /* sort_key_read */
 
-
 static int sort_ft_key_read(MI_SORT_PARAM *sort_param, void *key)
 {
   int error;
@@ -3950,25 +3955,28 @@ static ha_checksum mi_byte_checksum(const byte *buf, uint length)
   return crc;
 }
 
-/*
-  Deactive all not unique index that can be recreated fast
-  These include packed keys on which sorting will use more temporary
-  space than the max allowed file length or for which the unpacked keys
-  will take much more space than packed keys.
-  Note that 'rows' may be zero for the case when we don't know how many
-  rows we will put into the file.
- */
-
 static my_bool mi_too_big_key_for_sort(MI_KEYDEF *key, ha_rows rows)
 {
   uint key_maxlength=key->maxlength;
   if (key->flag & HA_FULLTEXT)
-    key_maxlength+=FT_MAX_WORD_LEN_FOR_SORT-HA_FT_MAXBYTELEN;
+  {
+    uint ft_max_word_len_for_sort=FT_MAX_WORD_LEN_FOR_SORT*
+                                  key->seg->charset->mbmaxlen;
+    key_maxlength+=ft_max_word_len_for_sort-HA_FT_MAXBYTELEN;
+  }
   return (key->flag & (HA_BINARY_PACK_KEY | HA_VAR_LENGTH_KEY | HA_FULLTEXT) &&
 	  ((ulonglong) rows * key_maxlength >
 	   (ulonglong) myisam_max_temp_length));
 }
 
+/*
+  Deactivate all not unique index that can be recreated fast
+  These include packed keys on which sorting will use more temporary
+  space than the max allowed file length or for which the unpacked keys
+  will take much more space than packed keys.
+  Note that 'rows' may be zero for the case when we don't know how many
+  rows we will put into the file.
+ */
 
 void mi_disable_non_unique_index(MI_INFO *info, ha_rows rows)
 {

myisam/mi_search.c

@@ -451,9 +451,8 @@ int _mi_prefix_search(MI_INFO *info, register MI_KEYDEF *keyinfo, uchar *page,
 	  /* We have to compare k and vseg as if they where space extended */
 	  for (end=vseg + (len-cmplen) ;
 	       vseg < end && *vseg == (uchar) ' ';
-	       vseg++) ;
-	  if (vseg == end)
-	    goto cmp_rest;		/* should never happen */
+	       vseg++, matched++) ;
+	  DBUG_ASSERT(vseg < end);
 
 	  if (*vseg > (uchar) ' ')
 	  {

myisam/myisamchk.c

@@ -154,7 +154,7 @@ enum options_mc {
   OPT_KEY_CACHE_BLOCK_SIZE, OPT_MYISAM_BLOCK_SIZE,
   OPT_READ_BUFFER_SIZE, OPT_WRITE_BUFFER_SIZE, OPT_SORT_BUFFER_SIZE,
   OPT_SORT_KEY_BLOCKS, OPT_DECODE_BITS, OPT_FT_MIN_WORD_LEN,
-  OPT_FT_MAX_WORD_LEN, OPT_FT_MAX_WORD_LEN_FOR_SORT, OPT_FT_STOPWORD_FILE,
+  OPT_FT_MAX_WORD_LEN, OPT_FT_STOPWORD_FILE,
   OPT_MAX_RECORD_LENGTH
 };
 

myisam/sort.c

@@ -204,7 +204,7 @@ int _create_index_by_sort(MI_SORT_PARAM *info,my_bool no_messages,
 	reinit_io_cache(&tempfile,READ_CACHE,0L,0,0))
       goto err;					/* purecov: inspected */
     if (!no_messages)
-      puts("  - Last merge and dumping keys\n"); /* purecov: tested */
+      printf("  - Last merge and dumping keys\n"); /* purecov: tested */
     if (merge_index(info,keys,sort_keys,dynamic_element(&buffpek,0,BUFFPEK *),
                     maxbuffer,&tempfile))
       goto err;					/* purecov: inspected */
@@ -219,6 +219,8 @@ int _create_index_by_sort(MI_SORT_PARAM *info,my_bool no_messages,
     uint     keyno=info->key;
     uint     key_length, ref_length=index->s->rec_reflength;
 
+    if (!no_messages)
+      printf("  - Adding exceptions\n"); /* purecov: tested */
     if (flush_io_cache(&tempfile_for_exceptions) ||
 	reinit_io_cache(&tempfile_for_exceptions,READ_CACHE,0L,0,0))
       goto err;

mysql-test/r/myisam.result

@@ -428,6 +428,22 @@ select * from t1 where a='807780' and b='477' and c='165';
 a	b	c
 807780	477	165
 drop table t1;
+DROP TABLE IF EXISTS t1;
+Warnings:
+Note	1051	Unknown table 't1'
+CREATE TABLE t1 (a varchar(150) NOT NULL, KEY (a));
+INSERT t1 VALUES ("can \tcan");
+INSERT t1 VALUES ("can   can");
+INSERT t1 VALUES ("can");
+SELECT * FROM t1;
+a
+can 	can
+can
+can   can
+CHECK TABLE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	check	status	OK
+DROP TABLE t1;
 create table t1 (a blob);
 insert into t1 values('a '),('a');
 select concat(a,'.') from t1 where a='a';

mysql-test/t/myisam.test

@@ -422,6 +422,18 @@ insert into t1 values('807780', '472', '162');
 select * from t1 where a='807780' and b='477' and c='165';
 drop table t1;
 
+#
+# space-stripping in _mi_prefix_search: BUG#5284
+#
+DROP TABLE IF EXISTS t1;
+CREATE TABLE t1 (a varchar(150) NOT NULL, KEY (a)); 
+INSERT t1 VALUES ("can \tcan"); 
+INSERT t1 VALUES ("can   can"); 
+INSERT t1 VALUES ("can"); 
+SELECT * FROM t1;
+CHECK TABLE t1;
+DROP TABLE t1;
+
 #
 # Verify blob handling
 #

sql/mysql_priv.h

@@ -783,10 +783,10 @@ int key_cmp(KEY_PART_INFO *key_part, const byte *key, uint key_length);
 bool init_errmessage(void);
 void sql_perror(const char *message);
 
-void vprint_msg_to_log( enum loglevel level, const char *format, va_list args );
-void sql_print_error( const char *format, ... );
-void sql_print_warning( const char *format, ...); 
-void sql_print_information( const char *format, ...); 
+void vprint_msg_to_log(enum loglevel level, const char *format, va_list args);
+void sql_print_error(const char *format, ...);
+void sql_print_warning(const char *format, ...);
+void sql_print_information(const char *format, ...);
 
 
 

sql/sql_acl.cc

@@ -251,7 +251,7 @@ my_bool acl_init(THD *org_thd, bool dont_read_acl_tables)
     {
       global_system_variables.old_passwords= 1;
       pthread_mutex_unlock(&LOCK_global_system_variables);
-      sql_print_error("mysql.user table is not updated to new password format; "
+      sql_print_warning("mysql.user table is not updated to new password format; "
                         "Disabling new password usage until "
                         "mysql_fix_privilege_tables is run");
     }

sql/sql_class.cc

@@ -1323,7 +1323,7 @@ void select_dumpvar::cleanup()
 
 Item_arena::Item_arena(THD* thd)
   :free_list(0),
-  state((int)INITIALIZED)
+  state(INITIALIZED)
 {
   init_sql_alloc(&mem_root,
                  thd->variables.query_alloc_block_size,
@@ -1335,7 +1335,7 @@ Item_arena::Item_arena(THD* thd)
 
 Item_arena::Item_arena()
   :free_list(0),
-  state((int)CONVENTIONAL_EXECUTION)
+  state(CONVENTIONAL_EXECUTION)
 {
   clear_alloc_root(&mem_root);
 }
@@ -1343,7 +1343,7 @@ Item_arena::Item_arena()
 
 Item_arena::Item_arena(bool init_mem_root)
   :free_list(0),
-  state((int)INITIALIZED)
+  state(INITIALIZED)
 {
   if (init_mem_root)
     clear_alloc_root(&mem_root);

sql/sql_class.h

@@ -427,13 +427,13 @@ class Item_arena
   */
   Item *free_list;
   MEM_ROOT mem_root;
-  enum 
+  enum enum_state 
   {
     INITIALIZED= 0, PREPARED= 1, EXECUTED= 3, CONVENTIONAL_EXECUTION= 2, 
     ERROR= -1
   };
   
-  int state;
+  enum_state state;
 
   /* We build without RTTI, so dynamic_cast can't be used. */
   enum Type
@@ -447,8 +447,8 @@ class Item_arena
   virtual Type type() const;
   virtual ~Item_arena();
 
-  inline bool is_stmt_prepare() const { return state < (int)PREPARED; }
-  inline bool is_first_stmt_execute() const { return state == (int)PREPARED; }
+  inline bool is_stmt_prepare() const { return (int)state < (int)PREPARED; }
+  inline bool is_first_stmt_execute() const { return state == PREPARED; }
   inline gptr alloc(unsigned int size) { return alloc_root(&mem_root,size); }
   inline gptr calloc(unsigned int size)
   {

sql/sql_prepare.cc

@@ -132,7 +132,7 @@ find_prepared_statement(THD *thd, ulong id, const char *where,
 {
   Statement *stmt= thd->stmt_map.find(id);
 
-  if (stmt == 0 || stmt->type() != (int)Item_arena::PREPARED_STATEMENT)
+  if (stmt == 0 || stmt->type() != Item_arena::PREPARED_STATEMENT)
   {
     char llbuf[22];
     my_error(ER_UNKNOWN_STMT_HANDLER, MYF(0), 22, llstr(id, llbuf), where);
@@ -1619,7 +1619,7 @@ int mysql_stmt_prepare(THD *thd, char *packet, uint packet_length,
     {
       sl->prep_where= sl->where;
     }
-    stmt->state= (int)Prepared_statement::PREPARED;
+    stmt->state= Item_arena::PREPARED;
   }
 
   DBUG_RETURN(!stmt);
@@ -1736,7 +1736,7 @@ void mysql_stmt_execute(THD *thd, char *packet, uint packet_length)
   DBUG_PRINT("exec_query:", ("%s", stmt->query));
 
   /* Check if we got an error when sending long data */
-  if (stmt->state == (int)Item_arena::ERROR)
+  if (stmt->state == Item_arena::ERROR)
   {
     send_error(thd, stmt->last_errno, stmt->last_error);
     DBUG_VOID_RETURN;
@@ -1853,7 +1853,7 @@ static void execute_stmt(THD *thd, Prepared_statement *stmt,
     transformations of the query tree (i.e. negations elimination).
     This should be done permanently on the parse tree of this statement.
   */
-  if (stmt->state == (int)Item_arena::PREPARED)
+  if (stmt->state == Item_arena::PREPARED)
     thd->current_arena= stmt;
 
   if (!(specialflag & SPECIAL_NO_PRIOR))
@@ -1866,10 +1866,10 @@ static void execute_stmt(THD *thd, Prepared_statement *stmt,
   /* Free Items that were created during this execution of the PS. */
   free_items(thd->free_list);
   thd->free_list= 0;
-  if (stmt->state == (int)Item_arena::PREPARED)
+  if (stmt->state == Item_arena::PREPARED)
   {
     thd->current_arena= thd;
-    stmt->state= (int)Item_arena::EXECUTED;
+    stmt->state= Item_arena::EXECUTED;
   }
   cleanup_items(stmt->free_list);
   reset_stmt_params(stmt);
@@ -1908,7 +1908,7 @@ void mysql_stmt_reset(THD *thd, char *packet)
                                       SEND_ERROR)))
     DBUG_VOID_RETURN;
 
-  stmt->state= (int)Item_arena::PREPARED;
+  stmt->state= Item_arena::PREPARED;
 
   /* 
     Clear parameters from data which could be set by 
@@ -1996,7 +1996,7 @@ void mysql_stmt_get_longdata(THD *thd, char *packet, ulong packet_length)
   if (param_number >= stmt->param_count)
   {
     /* Error will be sent in execute call */
-    stmt->state= (int)Item_arena::ERROR;
+    stmt->state= Item_arena::ERROR;
     stmt->last_errno= ER_WRONG_ARGUMENTS;
     sprintf(stmt->last_error, ER(ER_WRONG_ARGUMENTS),
             "mysql_stmt_send_long_data");
@@ -2012,7 +2012,7 @@ void mysql_stmt_get_longdata(THD *thd, char *packet, ulong packet_length)
   if (param->set_longdata(thd->extra_data, thd->extra_length))
 #endif
   {
-    stmt->state= (int)Item_arena::ERROR;
+    stmt->state= Item_arena::ERROR;
     stmt->last_errno= ER_OUTOFMEMORY;
     sprintf(stmt->last_error, ER(ER_OUTOFMEMORY), 0);
   }

sql/tztime.cc

@@ -1560,7 +1560,7 @@ my_tz_init(THD *org_thd, const char *default_tzname, my_bool bootstrap)
   if (open_tables(thd, tables_buff, &counter) ||
       lock_tables(thd, tables_buff, counter))
   {
-    sql_print_error("Warning: Can't open and lock time zone table: %s "
+    sql_print_warning("Can't open and lock time zone table: %s "
                       "trying to live without them", thd->net.last_error);
     /* We will try emulate that everything is ok */
     return_val= time_zone_tables_exist= 0;
@@ -1740,8 +1740,7 @@ tz_load_from_open_tables(const String *tz_name, TABLE_LIST *tz_tables)
   if (!(alloc_buff= alloc_root(&tz_storage, sizeof(TIME_ZONE_INFO) +
                                tz_name->length() + 1)))
   {
-    sql_print_error("Error: Out of memory while loading time zone "
-                    "description");
+    sql_print_error("Out of memory while loading time zone description");
     return 0;
   }
   tz_info= (TIME_ZONE_INFO *)alloc_buff;
@@ -1770,7 +1769,7 @@ tz_load_from_open_tables(const String *tz_name, TABLE_LIST *tz_tables)
   if (table->file->index_read(table->record[0], (byte*)table->field[0]->ptr,
                               0, HA_READ_KEY_EXACT))
   {
-    sql_print_error("Error: Can't find description of time zone.");
+    sql_print_error("Can't find description of time zone.");
     goto end;
   }
 
@@ -1791,7 +1790,7 @@ tz_load_from_open_tables(const String *tz_name, TABLE_LIST *tz_tables)
   if (table->file->index_read(table->record[0], (byte*)table->field[0]->ptr,
                               0, HA_READ_KEY_EXACT))
   {
-    sql_print_error("Error: Can't find description of time zone.");
+    sql_print_error("Can't find description of time zone.");
     goto end;
   }
 
@@ -1948,8 +1947,7 @@ tz_load_from_open_tables(const String *tz_name, TABLE_LIST *tz_tables)
 #endif
                                sizeof(TRAN_TYPE_INFO) * tz_info->typecnt)))
   {
-    sql_print_error("Error: Out of memory while loading time zone "
-                    "description");
+    sql_print_error("Out of memory while loading time zone description");
     goto end;
   }
 
@@ -1974,12 +1972,12 @@ tz_load_from_open_tables(const String *tz_name, TABLE_LIST *tz_tables)
   */
   if (tz_info->typecnt < 1)
   {
-    sql_print_error("Error: loading time zone without transition types");
+    sql_print_error("loading time zone without transition types");
     goto end;
   }
   if (prepare_tz_info(tz_info, &tz_storage))
   {
-    sql_print_error("Error: Unable to build mktime map for time zone");
+    sql_print_error("Unable to build mktime map for time zone");
     goto end;
   }
 
@@ -1991,7 +1989,7 @@ tz_load_from_open_tables(const String *tz_name, TABLE_LIST *tz_tables)
                             &my_charset_latin1),
        my_hash_insert(&tz_names, (const byte *)tmp_tzname)))
   {
-    sql_print_error("Error: Out of memory while loading time zone");
+    sql_print_error("Out of memory while loading time zone");
     goto end;
   }
 

strings/ctype-utf8.c

@@ -1590,6 +1590,15 @@ static uchar to_upper_utf8[] = {
   240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255
 };
 
+static inline int bincmp(const uchar *s, const uchar *se,
+                         const uchar *t, const uchar *te)
+{
+  int slen=se-s, tlen=te-t;
+  int len=min(slen,tlen);
+  int cmp= memcmp(s,t,len);
+  return cmp ? cmp : slen-tlen;
+}
+
 
 static int my_utf8_uni(CHARSET_INFO *cs __attribute__((unused)),
                        my_wc_t * pwc, const uchar *s, const uchar *e)
@@ -1824,8 +1833,8 @@ static int my_strnncoll_utf8(CHARSET_INFO *cs,
 
     if ( s_res <= 0 || t_res <= 0 )
     {
-      /* Incorrect string, compare by char value */
-      return ((int)s[0]-(int)t[0]); 
+      /* Incorrect string, compare byte by byte value */
+      return bincmp(s, se, t, te);
     }
 
     plane=(s_wc>>8) & 0xFF;
@@ -1889,8 +1898,8 @@ static int my_strnncollsp_utf8(CHARSET_INFO *cs,
 
     if ( s_res <= 0 || t_res <= 0 )
     {
-      /* Incorrect string, compare by char value */
-      return ((int)s[0]-(int)t[0]); 
+      /* Incorrect string, compare byte by byte value */
+      return bincmp(s, se, t, te);
     }
 
     plane=(s_wc>>8) & 0xFF;
@@ -1956,8 +1965,8 @@ static int my_strncasecmp_utf8(CHARSET_INFO *cs,
 
     if ( s_res <= 0 || t_res <= 0 )
     {
-      /* Incorrect string, compare by char value */
-      return ((int)s[0]-(int)t[0]); 
+      /* Incorrect string, compare byte by byte value */
+      return bincmp(s, se, t, te);
     }
 
     plane=(s_wc>>8) & 0xFF;