CREATE DEFINER=`root`@`%` FUNCTION `isfiltered`(field varchar(255)) RETURNS tinyint
BEGIN
    set @keywords = "";
    set @word = "";
    SELECT trim(value) into @keywords FROM guoyan.sysconfigure where fieldname = 'PresaleKeyword';
    set @keywords = replace(replace(@keywords, ' ', ''), '，', ',');
    set @keywords = concat(@keywords, ',');

	while length(@keywords) > 0 do
         select SUBSTRING_INDEX(@keywords, ',', 1) into @word;

		 if findbykeyword(field, @word) then
             return true;
		 end if;

         set @keywords = replace(@keywords, concat(@word, ','), '');

    end while;

    return false;

END