drop function if exists drop_shengmu;

delimiter $

create function drop_shengmu(name varchar(255) charset gbk)

returns varchar(255) charset gbk

begin

declare result varchar(255) charset gbk default '';

if (name!='ji'&&name!='qi'&&name!='xi'&&name!='yi'&&name!='er'&&name!='zhi'&&name!='chi'&&name!='shi'

&&name!='zi'&&name!='ci'&&name!='si'&&name!='an'&&name!='ai'&&name!='e'&&name!='en') then

if (instr(name,'zh')>0||instr(name,'ch')>0||instr(name,'sh')>0) then

setresult = replace(replace(replace(name,'sh',''),'ch','&