MySQL中树形递归检索_MySQL

oracle中可以使用start with ...... connect by ......来进行递归检索查询。

在MySQL中暂无相关函数，可以通过自定义函数方式来解决;

函数创建：

进入MySQL Command Line Client

mysql> delimiter $$mysql>mysql> CREATE FUNCTION `getTreeNodes`(rootId INT)    -> RETURNS varchar(1000)    -> BEGIN    ->   DECLARE sTemp VARCHAR(1000);    ->   DECLARE sTempChd VARCHAR(1000);    ->    ->   SET sTemp = '$';    ->   SET sTempChd =cast(rootId as CHAR);    ->    ->   WHILE sTempChd is not null DO    ->     SET sTemp = concat(sTemp,',',sTempChd);    ->     SELECT group_concat(table_pk) INTO sTempChd FROM your_tree_table where FIND_IN_SET(pid,sTempChd)>0;    ->   END WHILE;    ->   RETURN sTemp;    -> END    -> $$Query OK, 0 rows affected (0.00 sec)mysql>

函数调用：

SELECT * FROM your_tree_table WHERE FIND_IN_SET(table_pk, getTreeNodes(rootid));