MySQL 递归获取某文件夹的全路径

传递参数：文件夹ID

 1 DROP FUNCTION IF EXISTS RecursionFolderFullPath;
 2
 3 CREATE FUNCTION RecursionFolderFullPath(folderId INT(11))
 4 RETURNS VARCHAR(1000)
 5 BEGIN
 6 declare fullPath VARCHAR(1000) default ‘‘;
 7 declare parentId INT(11) default ‘0‘;
 8
 9 select concat(folder_name,‘/‘,fullPath),folder_parent_id into fullPath,parentId
10 from folder
11 where folder_id=folderId;
12
13 WHILE parentId > 0 DO
14 select concat(folder_name,‘/‘,fullPath),folder_parent_id into fullPath,parentId
15 from folder
16 where folder_id=parentId;
17 END WHILE;
18
19 return fullPath;
20 END;

调用：

1 select RecursionFolderFullPath(67);

结果：