mybatis-Mysql like语句值不固定

mybatismysql

    SELECT e.`ID`,e.`EmployeeID`,e.`CHNName`,e.`ENGName`,e.`Sex`,e.`Mobile`         FROM tb_pcm_coach c,tb_sys_employee e,tb_sys_employeetype tt, tb_sys_department d          WHERE c.ID=e.ID AND e.ID=tt.Employee AND e.dept = d.id                AND e.STATUS='FDCAAF7C-8FE8-4340-993E-9E29000B6F14'                               and tt.EmployeeType= #{employeetype}                      and INSTR(d.TreeKey, #{dept}) = 1                      and c.CoachLevel= #{coachlevel}                      and e.ID != #{eid}                       and e.CHNName like '%#{CHNName}%'         最下面like我想查e.CHNName包括传入的CHNName，也就是like的值不固定，请问应该怎么写？已解决，我从其他模块借鉴的        and INSTR(d.departmentname,#{departmentname}) > 0mysql中有一个方法 INSTR可以比对两个字符串。