Bug #12615411 - server side help doesn't work as first statement

Merged from mysql-5.1 to mysql-5.5

client/mysql.cc

@@ -2772,7 +2772,7 @@ static int com_server_help(String *buffer __attribute__((unused)),
 			   char *line __attribute__((unused)), char *help_arg)
 {
   MYSQL_ROW cur;
-  const char *server_cmd= buffer->ptr();
+  const char *server_cmd;
   char cmd_buf[100 + 1];
   MYSQL_RES *result;
   int error;
@@ -2787,8 +2787,11 @@ static int com_server_help(String *buffer __attribute__((unused)),
 		*++end_arg= '\0';
 	}
 	(void) strxnmov(cmd_buf, sizeof(cmd_buf), "help '", help_arg, "'", NullS);
-    server_cmd= cmd_buf;
   }
+  else
+    (void) strxnmov(cmd_buf, sizeof(cmd_buf), "help ", help_arg, NullS);
+
+  server_cmd= cmd_buf;
 
   if (!status.batch)
   {
@@ -2857,6 +2860,11 @@ static int com_server_help(String *buffer __attribute__((unused)),
     else
     {
       put_info("\nNothing found", INFO_INFO);
+      if (strncasecmp(server_cmd, "help 'contents'", 15) == 0)
+      {
+         put_info("\nPlease check if 'help tables' are loaded.\n", INFO_INFO); 
+         goto err;
+      }
       put_info("Please try to run 'help contents' for a list of all accessible topics\n", INFO_INFO);
     }
   }