mysqlimport.c, mysqldump.c, mysqlcheck.c, mysql.cc:

  No needs to load charset index if the character set is build-in.

client/mysql.cc

@@ -839,7 +839,9 @@ static int get_options(int argc, char **argv)
     opt_reconnect= 0;
     connect_flag= 0; /* Not in interactive mode */
   }
-  if (!(charset_info= get_charset_by_csname(default_charset, 
+  
+  if (strcmp(default_charset, charset_info->csname) &&
+      !(charset_info= get_charset_by_csname(default_charset, 
 					    MY_CS_PRIMARY, MYF(MY_WME))))
     exit(1);
   if (argc > 1)

client/mysqlcheck.c

@@ -311,7 +311,8 @@ static int get_options(int *argc, char ***argv)
   }
 
   /* TODO: This variable is not yet used */
-  if (!(charset_info= get_charset_by_csname(default_charset, 
+  if (strcmp(default_charset, charset_info->csname) &&
+      !(charset_info= get_charset_by_csname(default_charset, 
   					    MY_CS_PRIMARY, MYF(MY_WME))))
       exit(1);
   if (*argc > 0 && opt_alldbs)

client/mysqldump.c

@@ -536,7 +536,8 @@ static int get_options(int *argc, char ***argv)
 	    my_progname);
     return(1);
   }
-  if (!(charset_info= get_charset_by_csname(default_charset, 
+  if (strcmp(default_charset, charset_info->csname) &&
+      !(charset_info= get_charset_by_csname(default_charset, 
   					    MY_CS_PRIMARY, MYF(MY_WME))))
     exit(1);
   if ((*argc < 1 && !opt_alldbs) || (*argc > 0 && opt_alldbs))

client/mysqlimport.c

@@ -238,7 +238,8 @@ static int get_options(int *argc, char ***argv)
     fprintf(stderr, "You can't use --ignore (-i) and --replace (-r) at the same time.\n");
     return(1);
   }
-  if (!(charset_info= get_charset_by_csname(default_charset,
+  if (strcmp(default_charset, charset_info->csname) &&
+      !(charset_info= get_charset_by_csname(default_charset,
   					    MY_CS_PRIMARY, MYF(MY_WME))))
     exit(1);
   if (*argc < 2)