 SELECT
  `user`.id,
  `user`.username,
  `user`.`empid`,
  `user`.`deviceId`,
  emp.`empname`,
  dept.`name` deptname,
  user.sort,
  user.enable,
	user.keeper,
	user.maintenancePerson,
  GROUP_CONCAT(r.`name`) roleName
FROM
  user
  LEFT JOIN emp
    ON emp.id = `user`.`empid`
  LEFT JOIN department AS dept
    ON dept.id = emp.deptid
  LEFT JOIN user_role ur
    ON `user`.id = ur.user_id
  LEFT JOIN role r
    ON ur.role_id = r.id
WHERE (emp.pastureId = ?
  OR ? = 18)
  AND (`user`.username like concat('%',?,'%')  OR ? = '')
  AND (emp.`empname` like concat('%',?,'%') OR ? = '')
GROUP BY `user`.empid
ORDER BY user.sort