第一步：设置SET GLOBAL log_bin_trust_function_creators=TRUE;
如果报ERROR 1418 (HY000): This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and binary logging is enabled (you *might* want to use the less safe log_bin_trust_function_creators variable)这种错误
第二步：
DELIMITER $$
USE `zhiku`$$
DROP FUNCTION IF EXISTS `getChildDept`$$
CREATE FUNCTION `getChildDept`(rootId INT) RETURNS TEXT CHARSET utf8
BEGIN
DECLARE sTemp VARCHAR(1000);
DECLARE sTempChd VARCHAR(1000);
SET sTemp = '$';
SET sTempChd =CAST(rootId AS CHAR);
WHILE sTempChd IS NOT NULL DO
SET sTemp = CONCAT(sTemp,',',sTempChd);
SELECT GROUP_CONCAT(id) INTO sTempChd FROM zk_departments WHERE FIND_IN_SET(parent_id,sTempChd)>0;
END WHILE;
RETURN sTemp;
END$$
DELIMITER ;
第三步：直接调用
SELECT DISTINCT(d.user_id) AS user_id,d.dept_id,u.compellation FROM zk_user_departments d INNER JOIN zk_users u ON u.id=d.user_id AND INSTR(u.pinyin,'h')=2 WHERE FIND_IN_SET(d.dept_id, getChildDept(128)) GROUP BY d.user_id;
放在cakephp为:
$conditions = array('FIND_IN_SET(dept_id, getChildDept('.$dept_id.'))');
$condition_join = '`User`.`id` = `UserDepartment`.`user_id`';
if(!empty($c))$condition_join .= ' AND INSTR(User.pinyin,"'.$c.'")=2';
//分页
$this->paginate = array(
'UserDepartment' => array(
'conditions' => $conditions,
'order' => array('dept_id'=>'ASC'),
'limit' => 10,
'recursive' => -1,
'group' => array('user_id'),
'fields' => array('user_id','dept_id'),
'joins' => array(array(
'alias' => 'User',
'table' => 'zk_users',
'type' => 'INNER',
'conditions' => $condition_join,
)),
)
);
$data = $this->paginate('UserDepartment');