Adding the "const" qualified to the LEX_CSTRING parameter of a few check_xxx() functions

Functions:
check_routine_name()
check_string_byte_length()
check_string_char_length()
check_ident_length()

sql/sp_head.cc

@@ -480,7 +480,7 @@ sp_name::sp_name(const MDL_key *key, char *qname_buff)
 */
 
 bool
-check_routine_name(LEX_CSTRING *ident)
+check_routine_name(const LEX_CSTRING *ident)
 {
   DBUG_ASSERT(ident);
   DBUG_ASSERT(ident->str);

sql/sp_head.h

@@ -125,7 +125,7 @@ class sp_name : public Sql_alloc,
 
 
 bool
-check_routine_name(LEX_CSTRING *ident);
+check_routine_name(const LEX_CSTRING *ident);
 
 class sp_head :private Query_arena,
                public Database_qualified_name

sql/sql_parse.cc

@@ -9677,7 +9677,7 @@ LEX_USER *create_definer(THD *thd, LEX_CSTRING *user_name,
     The function is not used in existing code but can be useful later?
 */
 
-bool check_string_byte_length(LEX_CSTRING *str, uint err_msg,
+bool check_string_byte_length(const LEX_CSTRING *str, uint err_msg,
                               uint max_byte_length)
 {
   if (str->length <= max_byte_length)
@@ -9707,7 +9707,7 @@ bool check_string_byte_length(LEX_CSTRING *str, uint err_msg,
 */
 
 
-bool check_string_char_length(LEX_CSTRING *str, uint err_msg,
+bool check_string_char_length(const LEX_CSTRING *str, uint err_msg,
                               uint max_char_length, CHARSET_INFO *cs,
                               bool no_error)
 {
@@ -9726,7 +9726,7 @@ bool check_string_char_length(LEX_CSTRING *str, uint err_msg,
 }
 
 
-bool check_ident_length(LEX_CSTRING *ident)
+bool check_ident_length(const LEX_CSTRING *ident)
 {
   if (check_string_char_length(ident, 0, NAME_CHAR_LEN, system_charset_info, 1))
   {

sql/sql_parse.h

@@ -73,12 +73,12 @@ LEX_USER *create_default_definer(THD *thd, bool role);
 LEX_USER *create_definer(THD *thd, LEX_CSTRING *user_name, LEX_CSTRING *host_name);
 LEX_USER *get_current_user(THD *thd, LEX_USER *user, bool lock=true);
 bool sp_process_definer(THD *thd);
-bool check_string_byte_length(LEX_CSTRING *str, uint err_msg,
+bool check_string_byte_length(const LEX_CSTRING *str, uint err_msg,
                               uint max_byte_length);
-bool check_string_char_length(LEX_CSTRING *str, uint err_msg,
+bool check_string_char_length(const LEX_CSTRING *str, uint err_msg,
                               uint max_char_length, CHARSET_INFO *cs,
                               bool no_error);
-bool check_ident_length(LEX_CSTRING *ident);
+bool check_ident_length(const LEX_CSTRING *ident);
 CHARSET_INFO* merge_charset_and_collation(CHARSET_INFO *cs, CHARSET_INFO *cl);
 CHARSET_INFO *find_bin_collation(CHARSET_INFO *cs);
 bool check_host_name(LEX_CSTRING *str);