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-- ---------------------------- -- Table structure for `treenodes` -- ---------------------------- DROP TABLE IF EXISTS `treenodes`; CREATE TABLE `treenodes` (   `id` int(11) NOT NULL,   `nodename` varchar(20) DEFAULT NULL,   `pid` int(11) DEFAULT NULL,   PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1;

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-- ---------------------------- -- Records of treenodes -- ---------------------------- INSERT INTO `treenodes` VALUES ('1', 'A', '0'); INSERT INTO `treenodes` VALUES ('2', 'B', '1'); INSERT INTO `treenodes` VALUES ('3', 'C', '1'); INSERT INTO `treenodes` VALUES ('4', 'D', '2'); INSERT INTO `treenodes` VALUES ('5', 'E', '2'); INSERT INTO `treenodes` VALUES ('6', 'F', '3'); INSERT INTO `treenodes` VALUES ('7', 'G', '6'); INSERT INTO `treenodes` VALUES ('8', 'H', '0'); INSERT INTO `treenodes` VALUES ('9', 'I', '8'); INSERT INTO `treenodes` VALUES ('10', 'J', '8'); INSERT INTO `treenodes` VALUES ('11', 'K', '8'); INSERT INTO `treenodes` VALUES ('12', 'L', '9'); INSERT INTO `treenodes` VALUES ('13', 'M', '9'); INSERT INTO `treenodes` VALUES ('14', 'N', '12'); INSERT INTO `treenodes` VALUES ('15', 'O', '12'); INSERT INTO `treenodes` VALUES ('16', 'P', '15'); INSERT INTO `treenodes` VALUES ('17', 'Q', '15');

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delimiter // CREATE FUNCTION `getParLst`(rootId INT)RETURNS varchar(1000) 

BEGIN DECLARE sTemp VARCHAR(1000);  DECLARE sTempPar VARCHAR(1000);   SET sTemp = '';    SET sTempPar =rootId; 

  #循环递归 WHILE sTempPar is not null DO         #判断是否是第一个，不加的话第一个会为空       IF sTemp != '' THEN            SET sTemp = concat(sTemp,',',sTempPar);        ELSE          SET sTemp = sTempPar;        END IF;

     SET sTemp = concat(sTemp,',',sTempPar);        SELECT group_concat(pid) INTO sTempPar FROM treenodes where pid<>id and FIND_IN_SET(id,sTempPar)>0;  END WHILE; 

RETURN sTemp; END//

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delimiter // CREATE FUNCTION `getParLst`(rootId INT)RETURNS varchar(1000) 

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  treeNodes where FIND_IN_SET(pid,sTempChd)>0;       END WHILE;    RETURN sTemp; END//