MySql 用一句SQL语句查询IP地址是否在列表中（支持通配符）

在MySql中先创建一函数，目前MySql自定义函数只能返回一个值，无法以表形式返回

CREATE DEFINER = 'root'@'%' FUNCTION `split`(

        f_string varchar(1000),

        f_delimiter varchar(100),

        f_order int

    )

    RETURNS varchar(1000) CHARSET utf8

    NOT DETERMINISTIC

    CONTAINS SQL

    SQL SECURITY DEFINER

    COMMENT ''

BEGIN 

 declare result varchar(1000) default ''; 

 set result = reverse(substring_index(reverse(substring_index(f_string,f_delimiter,f_order)),reverse(f_delimiter),1));

 if result="" then

    set result="*"; 

 end if;

 return result; 

END;

SQL查询语句：

Select * from (select IP,split(IP,'.',1) as IP1,split(IP,'.',2) as IP2,split(IP,'.',3) as IP3,split(IP,'.',4) as IP4 from wx_ip_list where  VoteID=20 And IsEnabled=0 ) b  where (split('172.30.30.17','.',1)=IP1 or IP1='*') and (split('172.30.30.17','.',2)=IP2
or IP2='*') and (split('172.30.30.17','.',3)=IP3 or IP3='*') and (split('172.30.30.17','.',4)=IP4 or IP4='*')