MySQL 實現樹形的遍歷

發表於2016-09-17

前言：
關於多級別選單欄或者許可權系統中部門上下級的樹形遍歷，oracle中有connect by來實現，mysql沒有這樣的便捷途徑，所以MySQL遍歷資料表是我們經常會遇到的頭痛問題，下面通過儲存過程來實現。
1，建立測試表和資料：

DROP TABLE IF EXISTS csdn.channel;   
CREATE TABLE csdn.channel (   
  id INT(11) NOT NULL AUTO_INCREMENT,     
  cname VARCHAR(200) DEFAULT NULL,   
  parent_id INT(11) DEFAULT NULL,   
  PRIMARY KEY (id)   
) ENGINE=INNODB DEFAULT CHARSET=utf8;   
INSERT  INTO channel(id,cname,parent_id)    
VALUES (13,'首頁',-1),   
       (14,'TV580',-1),   
       (15,'生活580',-1),   
       (16,'左上幻燈片',13),   
       (17,'幫忙',14),   
       (18,'欄目簡介',17);  
DROP TABLE IF EXISTS channel;

DROP TABLE IF EXISTS csdn.channel;

CREATE TABLE csdn.channel (

id INT(11) NOT NULL AUTO_INCREMENT,

cname VARCHAR(200) DEFAULT NULL,

parent_id INT(11) DEFAULT NULL,

PRIMARY KEY (id)

) ENGINE=INNODB DEFAULT CHARSET=utf8;

INSERT INTO channel(id,cname,parent_id)

VALUES (13,'首頁',-1),

(14,'TV580',-1),

(15,'生活580',-1),

(16,'左上幻燈片',13),

(17,'幫忙',14),

(18,'欄目簡介',17);

DROP TABLE IF EXISTS channel;

2，利用臨時表和遞迴過程實現樹的遍歷（mysql的UDF不能遞迴呼叫）：
2.1，從某節點向下遍歷子節點，遞迴生成臨時表資料

-- pro_cre_childlist
DELIMITER
DROP PROCEDURE IF EXISTS csdn.pro_cre_childlist
CREATE PROCEDURE csdn.pro_cre_childlist(IN rootId INT,IN nDepth INT)
BEGIN
      DECLARE done INT DEFAULT 0;
      DECLARE b INT;
      DECLARE cur1 CURSOR FOR SELECT id FROM channel WHERE parent_id=rootId;
      DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
      SET max_sp_recursion_depth=12;
       
      INSERT INTO tmpLst VALUES (NULL,rootId,nDepth);   
       
      OPEN cur1;   
       
      FETCH cur1 INTO b;   
      WHILE done=0 DO   
              CALL pro_cre_childlist(b,nDepth+1);   
              FETCH cur1 INTO b;   
      END WHILE;   
       
      CLOSE cur1;   
END

-- pro_cre_childlist

DELIMITER

DROP PROCEDURE IF EXISTS csdn.pro_cre_childlist

CREATE PROCEDURE csdn.pro_cre_childlist(IN rootId INT,IN nDepth INT)

BEGIN

DECLARE done INT DEFAULT 0;

DECLARE b INT;

DECLARE cur1 CURSOR FOR SELECT id FROM channel WHERE parent_id=rootId;

DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;

SET max_sp_recursion_depth=12;

INSERT INTO tmpLst VALUES (NULL,rootId,nDepth);

OPEN cur1;

FETCH cur1 INTO b;

WHILE done=0 DO

CALL pro_cre_childlist(b,nDepth+1);

FETCH cur1 INTO b;

END WHILE;

CLOSE cur1;

END

2.2，從某節點向上追溯根節點，遞迴生成臨時表資料

-- pro_cre_parentlist
DELIMITER
DROP PROCEDURE IF EXISTS csdn.pro_cre_parentlist
CREATE PROCEDURE csdn.pro_cre_parentlist(IN rootId INT,IN nDepth INT)   
BEGIN   
      DECLARE done INT DEFAULT 0;   
      DECLARE b INT;   
      DECLARE cur1 CURSOR FOR SELECT parent_id FROM channel WHERE id=rootId;   
      DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;   
      SET max_sp_recursion_depth=12;   
       
      INSERT INTO tmpLst VALUES (NULL,rootId,nDepth);   
       
      OPEN cur1;   
       
      FETCH cur1 INTO b;   
      WHILE done=0 DO   
              CALL pro_cre_parentlist(b,nDepth+1);   
              FETCH cur1 INTO b;   
      END WHILE;   
       
      CLOSE cur1;   
     END

-- pro_cre_parentlist

DELIMITER

DROP PROCEDURE IF EXISTS csdn.pro_cre_parentlist

CREATE PROCEDURE csdn.pro_cre_parentlist(IN rootId INT,IN nDepth INT)

BEGIN

DECLARE done INT DEFAULT 0;

DECLARE b INT;

DECLARE cur1 CURSOR FOR SELECT parent_id FROM channel WHERE id=rootId;

DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;

SET max_sp_recursion_depth=12;

INSERT INTO tmpLst VALUES (NULL,rootId,nDepth);

OPEN cur1;

FETCH cur1 INTO b;

WHILE done=0 DO

CALL pro_cre_parentlist(b,nDepth+1);

FETCH cur1 INTO b;

END WHILE;

CLOSE cur1;

END

2.3，實現類似Oracle SYS_CONNECT_BY_PATH的功能，遞迴過程輸出某節點id路徑

-- pro_cre_pathlist
DELIMITER
USE csdn
DROP PROCEDURE IF EXISTS pro_cre_pathlist
CREATE PROCEDURE pro_cre_pathlist(IN nid INT,IN delimit VARCHAR(10),INOUT pathstr VARCHAR(1000))
BEGIN                     
      DECLARE done INT DEFAULT 0;   
      DECLARE parentid INT DEFAULT 0;         
      DECLARE cur1 CURSOR FOR    
      SELECT t.parent_id,CONCAT(CAST(t.parent_id AS CHAR),delimit,pathstr)   
        FROM channel AS t WHERE t.id = nid;   
           
      DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;   
      SET max_sp_recursion_depth=12;                     
       
      OPEN cur1;   
       
      FETCH cur1 INTO parentid,pathstr;   
      WHILE done=0 DO              
              CALL pro_cre_pathlist(parentid,delimit,pathstr);   
              FETCH cur1 INTO parentid,pathstr;   
      END WHILE;   
            
      CLOSE cur1;    
END


DELIMITER ;

-- pro_cre_pathlist

DELIMITER

USE csdn

DROP PROCEDURE IF EXISTS pro_cre_pathlist

CREATE PROCEDURE pro_cre_pathlist(IN nid INT,IN delimit VARCHAR(10),INOUT pathstr VARCHAR(1000))

BEGIN

DECLARE done INT DEFAULT 0;

DECLARE parentid INT DEFAULT 0;

DECLARE cur1 CURSOR FOR

SELECT t.parent_id,CONCAT(CAST(t.parent_id AS CHAR),delimit,pathstr)

FROM channel AS t WHERE t.id = nid;

DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;

SET max_sp_recursion_depth=12;

OPEN cur1;

FETCH cur1 INTO parentid,pathstr;

WHILE done=0 DO

CALL pro_cre_pathlist(parentid,delimit,pathstr);

FETCH cur1 INTO parentid,pathstr;

END WHILE;

CLOSE cur1;

END

DELIMITER ;

2.4，遞迴過程輸出某節點name路徑

-- pro_cre_pnlist
DELIMITER
USE csdn
DROP PROCEDURE IF EXISTS pro_cre_pnlist
CREATE PROCEDURE pro_cre_pnlist(IN nid INT,IN delimit VARCHAR(10),INOUT pathstr VARCHAR(1000))
BEGIN                     
      DECLARE done INT DEFAULT 0;   
      DECLARE parentid INT DEFAULT 0;         
      DECLARE cur1 CURSOR FOR    
      SELECT t.parent_id,CONCAT(t.cname,delimit,pathstr)   
        FROM channel AS t WHERE t.id = nid;   
           
      DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;   
      SET max_sp_recursion_depth=12;                     
       
      OPEN cur1;   
       
      FETCH cur1 INTO parentid,pathstr;   
      WHILE done=0 DO              
              CALL pro_cre_pnlist(parentid,delimit,pathstr);   
              FETCH cur1 INTO parentid,pathstr;   
      END WHILE;   
            
      CLOSE cur1;    
     END


DELIMITER ;

-- pro_cre_pnlist

DELIMITER

USE csdn

DROP PROCEDURE IF EXISTS pro_cre_pnlist

CREATE PROCEDURE pro_cre_pnlist(IN nid INT,IN delimit VARCHAR(10),INOUT pathstr VARCHAR(1000))

BEGIN

DECLARE done INT DEFAULT 0;

DECLARE parentid INT DEFAULT 0;

DECLARE cur1 CURSOR FOR

SELECT t.parent_id,CONCAT(t.cname,delimit,pathstr)

FROM channel AS t WHERE t.id = nid;

DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;

SET max_sp_recursion_depth=12;

OPEN cur1;

FETCH cur1 INTO parentid,pathstr;

WHILE done=0 DO

CALL pro_cre_pnlist(parentid,delimit,pathstr);

FETCH cur1 INTO parentid,pathstr;

END WHILE;

CLOSE cur1;

END

DELIMITER ;

2.5，呼叫函式輸出id路徑

-- fn_tree_path
DELIMITER
DROP FUNCTION IF EXISTS csdn.fn_tree_path
CREATE FUNCTION csdn.fn_tree_path(nid INT,delimit VARCHAR(10)) RETURNS VARCHAR(2000) CHARSET utf8   
BEGIN     
  DECLARE pathid VARCHAR(1000);   
     
  SET pathid=CAST(nid AS CHAR);   
  CALL pro_cre_pathlist(nid,delimit,pathid);   
     
  RETURN pathid;   
END

-- fn_tree_path

DELIMITER

DROP FUNCTION IF EXISTS csdn.fn_tree_path

CREATE FUNCTION csdn.fn_tree_path(nid INT,delimit VARCHAR(10)) RETURNS VARCHAR(2000) CHARSET utf8

BEGIN

DECLARE pathid VARCHAR(1000);

SET pathid=CAST(nid AS CHAR);

CALL pro_cre_pathlist(nid,delimit,pathid);

RETURN pathid;

END

2.6，呼叫函式輸出name路徑

-- fn_tree_pathname
-- 呼叫函式輸出name路徑   
DELIMITER
DROP FUNCTION IF EXISTS csdn.fn_tree_pathname
CREATE FUNCTION csdn.fn_tree_pathname(nid INT,delimit VARCHAR(10)) RETURNS VARCHAR(2000) CHARSET utf8   
BEGIN     
  DECLARE pathid VARCHAR(1000);   
  SET pathid='';       
  CALL pro_cre_pnlist(nid,delimit,pathid);   
  RETURN pathid;   
END
DELIMITER ;

-- fn_tree_pathname

-- 呼叫函式輸出name路徑

DELIMITER

DROP FUNCTION IF EXISTS csdn.fn_tree_pathname

CREATE FUNCTION csdn.fn_tree_pathname(nid INT,delimit VARCHAR(10)) RETURNS VARCHAR(2000) CHARSET utf8

BEGIN

DECLARE pathid VARCHAR(1000);

SET pathid='';

CALL pro_cre_pnlist(nid,delimit,pathid);

RETURN pathid;

END

DELIMITER ;

2.7，呼叫過程輸出子節點

-- pro_show_childLst  
DELIMITER
-- 呼叫過程輸出子節點   
DROP PROCEDURE IF EXISTS pro_show_childLst
CREATE PROCEDURE pro_show_childLst(IN rootId INT)   
BEGIN   
      DROP TEMPORARY TABLE IF EXISTS tmpLst;   
      CREATE TEMPORARY TABLE IF NOT EXISTS tmpLst    
       (sno INT PRIMARY KEY AUTO_INCREMENT,id INT,depth INT);         
       
      CALL pro_cre_childlist(rootId,0);   
       
      SELECT channel.id,CONCAT(SPACE(tmpLst.depth*2),'--',channel.cname) NAME,channel.parent_id,tmpLst.depth,fn_tree_path(channel.id,'/') path,fn_tree_pathname(channel.id,'/') pathname   
      FROM tmpLst,channel WHERE tmpLst.id=channel.id ORDER BY tmpLst.sno;   
     END

-- pro_show_childLst

DELIMITER

-- 呼叫過程輸出子節點

DROP PROCEDURE IF EXISTS pro_show_childLst

CREATE PROCEDURE pro_show_childLst(IN rootId INT)

BEGIN

DROP TEMPORARY TABLE IF EXISTS tmpLst;

CREATE TEMPORARY TABLE IF NOT EXISTS tmpLst

(sno INT PRIMARY KEY AUTO_INCREMENT,id INT,depth INT);

CALL pro_cre_childlist(rootId,0);

SELECT channel.id,CONCAT(SPACE(tmpLst.depth*2),'--',channel.cname) NAME,channel.parent_id,tmpLst.depth,fn_tree_path(channel.id,'/') path,fn_tree_pathname(channel.id,'/') pathname

FROM tmpLst,channel WHERE tmpLst.id=channel.id ORDER BY tmpLst.sno;

END

2.8，呼叫過程輸出父節點

-- pro_show_parentLst
DELIMITER
-- 呼叫過程輸出父節點   
DROP PROCEDURE IF EXISTS `pro_show_parentLst`
CREATE PROCEDURE `pro_show_parentLst`(IN rootId INT)   
BEGIN   
      DROP TEMPORARY TABLE IF EXISTS tmpLst;   
      CREATE TEMPORARY TABLE IF NOT EXISTS tmpLst    
       (sno INT PRIMARY KEY AUTO_INCREMENT,id INT,depth INT);         
       
      CALL pro_cre_parentlist(rootId,0);   
      SELECT channel.id,CONCAT(SPACE(tmpLst.depth*2),'--',channel.cname) NAME,channel.parent_id,tmpLst.depth,fn_tree_path(channel.id,'/') path,fn_tree_pathname(channel.id,'/') pathname   
      FROM tmpLst,channel WHERE tmpLst.id=channel.id ORDER BY tmpLst.sno;   
     END

-- pro_show_parentLst

DELIMITER

-- 呼叫過程輸出父節點

DROP PROCEDURE IF EXISTS `pro_show_parentLst`

CREATE PROCEDURE `pro_show_parentLst`(IN rootId INT)

BEGIN

DROP TEMPORARY TABLE IF EXISTS tmpLst;

CREATE TEMPORARY TABLE IF NOT EXISTS tmpLst

(sno INT PRIMARY KEY AUTO_INCREMENT,id INT,depth INT);

CALL pro_cre_parentlist(rootId,0);

SELECT channel.id,CONCAT(SPACE(tmpLst.depth*2),'--',channel.cname) NAME,channel.parent_id,tmpLst.depth,fn_tree_path(channel.id,'/') path,fn_tree_pathname(channel.id,'/') pathname

FROM tmpLst,channel WHERE tmpLst.id=channel.id ORDER BY tmpLst.sno;

END

3，開始測試：
3.1，從根節點開始顯示，顯示子節點集合：

mysql> CALL pro_show_childLst(-1);
+----+-----------------------+-----------+-------+-------------+----------------------------+
| id | NAME                  | parent_id | depth | path        | pathname                   |
+----+-----------------------+-----------+-------+-------------+----------------------------+
| 13 |   --首頁              |        -1 |     1 | -1/13       | 首頁/                      |
| 16 |     --左上幻燈片      |        13 |     2 | -1/13/16    | 首頁/左上幻燈片/           |
| 14 |   --TV580             |        -1 |     1 | -1/14       | TV580/                     |
| 17 |     --幫忙            |        14 |     2 | -1/14/17    | TV580/幫忙/                |
| 18 |       --欄目簡介      |        17 |     3 | -1/14/17/18 | TV580/幫忙/欄目簡介/       |
| 15 |   --生活580           |        -1 |     1 | -1/15       | 生活580/                   |
+----+-----------------------+-----------+-------+-------------+----------------------------+
6 rows in set (0.05 sec)

Query OK, 0 rows affected (0.05 sec)

mysql> CALL pro_show_childLst(-1);

+----+-----------------------+-----------+-------+-------------+----------------------------+

+----+-----------------------+-----------+-------+-------------+----------------------------+

| 13 | --首頁 | -1 | 1 | -1/13 | 首頁/ |

| 16 | --左上幻燈片 | 13 | 2 | -1/13/16 | 首頁/左上幻燈片/ |

| 14 | --TV580 | -1 | 1 | -1/14 | TV580/ |

| 17 | --幫忙 | 14 | 2 | -1/14/17 | TV580/幫忙/ |

| 18 | --欄目簡介 | 17 | 3 | -1/14/17/18 | TV580/幫忙/欄目簡介/ |

| 15 | --生活580 | -1 | 1 | -1/15 | 生活580/ |

+----+-----------------------+-----------+-------+-------------+----------------------------+

6 rows in set (0.05 sec)

Query OK, 0 rows affected (0.05 sec)

3.2，顯示首頁下面的子節點

CALL pro_show_childLst(13);
mysql> CALL pro_show_childLst(13);
+----+---------------------+-----------+-------+----------+-------------------------+
| id | NAME                | parent_id | depth | path     | pathname                |
+----+---------------------+-----------+-------+----------+-------------------------+
| 13 | --首頁              |        -1 |     0 | -1/13    | 首頁/                   |
| 16 |   --左上幻燈片      |        13 |     1 | -1/13/16 | 首頁/左上幻燈片/        |
+----+---------------------+-----------+-------+----------+-------------------------+
2 rows in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

mysql>

CALL pro_show_childLst(13);

mysql> CALL pro_show_childLst(13);

+----+---------------------+-----------+-------+----------+-------------------------+

+----+---------------------+-----------+-------+----------+-------------------------+

| 13 | --首頁 | -1 | 0 | -1/13 | 首頁/ |

| 16 | --左上幻燈片 | 13 | 1 | -1/13/16 | 首頁/左上幻燈片/ |

+----+---------------------+-----------+-------+----------+-------------------------+

2 rows in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

mysql>

3.3，顯示TV580下面的所有子節點

CALL pro_show_childLst(14);
mysql> CALL pro_show_childLst(14);
+----+--------------------+-----------+-------+-------------+----------------------------+
| id | NAME               | parent_id | depth | path        | pathname                   |
+----+--------------------+-----------+-------+-------------+----------------------------+
| 14 | --TV580            |        -1 |     0 | -1/14       | TV580/                     |
| 17 |   --幫忙           |        14 |     1 | -1/14/17    | TV580/幫忙/                |
| 18 |     --欄目簡介     |        17 |     2 | -1/14/17/18 | TV580/幫忙/欄目簡介/       |
+----+--------------------+-----------+-------+-------------+----------------------------+
3 rows in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

mysql>

CALL pro_show_childLst(14);

mysql> CALL pro_show_childLst(14);

+----+--------------------+-----------+-------+-------------+----------------------------+

+----+--------------------+-----------+-------+-------------+----------------------------+

| 14 | --TV580 | -1 | 0 | -1/14 | TV580/ |

| 17 | --幫忙 | 14 | 1 | -1/14/17 | TV580/幫忙/ |

| 18 | --欄目簡介 | 17 | 2 | -1/14/17/18 | TV580/幫忙/欄目簡介/ |

+----+--------------------+-----------+-------+-------------+----------------------------+

3 rows in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

mysql>

3.4，“幫忙”節點有一個子節點，顯示出來：

CALL pro_show_childLst(17);
mysql> CALL pro_show_childLst(17);
+----+------------------+-----------+-------+-------------+----------------------------+
| id | NAME             | parent_id | depth | path        | pathname                   |
+----+------------------+-----------+-------+-------------+----------------------------+
| 17 | --幫忙           |        14 |     0 | -1/14/17    | TV580/幫忙/                |
| 18 |   --欄目簡介     |        17 |     1 | -1/14/17/18 | TV580/幫忙/欄目簡介/       |
+----+------------------+-----------+-------+-------------+----------------------------+
2 rows in set (0.03 sec)

Query OK, 0 rows affected (0.03 sec)

mysql>

CALL pro_show_childLst(17);

mysql> CALL pro_show_childLst(17);

+----+------------------+-----------+-------+-------------+----------------------------+

+----+------------------+-----------+-------+-------------+----------------------------+

| 17 | --幫忙 | 14 | 0 | -1/14/17 | TV580/幫忙/ |

| 18 | --欄目簡介 | 17 | 1 | -1/14/17/18 | TV580/幫忙/欄目簡介/ |

+----+------------------+-----------+-------+-------------+----------------------------+

2 rows in set (0.03 sec)

Query OK, 0 rows affected (0.03 sec)

mysql>

3.5，“欄目簡介”沒有子節點，所以只顯示最終節點：

mysql> CALL pro_show_childLst(18);
+----+----------------+-----------+-------+-------------+----------------------------+
| id | NAME           | parent_id | depth | path        | pathname                   |
+----+----------------+-----------+-------+-------------+----------------------------+
| 18 | --欄目簡介     |        17 |     0 | -1/14/17/18 | TV580/幫忙/欄目簡介/       |
+----+----------------+-----------+-------+-------------+----------------------------+
1 row in set (0.36 sec)

Query OK, 0 rows affected (0.36 sec)

mysql>

mysql> CALL pro_show_childLst(18);

+----+----------------+-----------+-------+-------------+----------------------------+

+----+----------------+-----------+-------+-------------+----------------------------+

| 18 | --欄目簡介 | 17 | 0 | -1/14/17/18 | TV580/幫忙/欄目簡介/ |

+----+----------------+-----------+-------+-------------+----------------------------+

1 row in set (0.36 sec)

Query OK, 0 rows affected (0.36 sec)

mysql>

3.6，顯示根節點的父節點

CALL pro_show_parentLst(-1);
mysql> CALL pro_show_parentLst(-1);
Empty set (0.01 sec)

Query OK, 0 rows affected (0.01 sec)

mysql>

CALL pro_show_parentLst(-1);

mysql> CALL pro_show_parentLst(-1);

Empty set (0.01 sec)

Query OK, 0 rows affected (0.01 sec)

mysql>

3.7，顯示“首頁”的父節點

CALL pro_show_parentLst(13);
mysql> CALL pro_show_parentLst(13);
+----+----------+-----------+-------+-------+----------+
| id | NAME     | parent_id | depth | path  | pathname |
+----+----------+-----------+-------+-------+----------+
| 13 | --首頁   |        -1 |     0 | -1/13 | 首頁/    |
+----+----------+-----------+-------+-------+----------+
1 row in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

mysql>

CALL pro_show_parentLst(13);

mysql> CALL pro_show_parentLst(13);

+----+----------+-----------+-------+-------+----------+

+----+----------+-----------+-------+-------+----------+

| 13 | --首頁 | -1 | 0 | -1/13 | 首頁/ |

+----+----------+-----------+-------+-------+----------+

1 row in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

mysql>

3.8，顯示“TV580”的父節點，parent_id為-1

CALL pro_show_parentLst(14);
mysql> CALL pro_show_parentLst(14);
+----+---------+-----------+-------+-------+----------+
| id | NAME    | parent_id | depth | path  | pathname |
+----+---------+-----------+-------+-------+----------+
| 14 | --TV580 |        -1 |     0 | -1/14 | TV580/   |
+----+---------+-----------+-------+-------+----------+
1 row in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

CALL pro_show_parentLst(14);

mysql> CALL pro_show_parentLst(14);

+----+---------+-----------+-------+-------+----------+

+----+---------+-----------+-------+-------+----------+

| 14 | --TV580 | -1 | 0 | -1/14 | TV580/ |

+----+---------+-----------+-------+-------+----------+

1 row in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

3.9，顯示“幫忙”節點的父節點

mysql>
CALL pro_show_parentLst(17);
mysql> CALL pro_show_parentLst(17);
+----+-----------+-----------+-------+----------+---------------+
| id | NAME      | parent_id | depth | path     | pathname      |
+----+-----------+-----------+-------+----------+---------------+
| 17 | --幫忙    |        14 |     0 | -1/14/17 | TV580/幫忙/   |
| 14 |   --TV580 |        -1 |     1 | -1/14    | TV580/        |
+----+-----------+-----------+-------+----------+---------------+
2 rows in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

mysql>

mysql>

CALL pro_show_parentLst(17);

mysql> CALL pro_show_parentLst(17);

+----+-----------+-----------+-------+----------+---------------+

+----+-----------+-----------+-------+----------+---------------+

| 17 | --幫忙 | 14 | 0 | -1/14/17 | TV580/幫忙/ |

| 14 | --TV580 | -1 | 1 | -1/14 | TV580/ |

+----+-----------+-----------+-------+----------+---------------+

2 rows in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

mysql>

3.10，顯示最低層節點“欄目簡介”的父節點

CALL pro_show_parentLst(18);
mysql> CALL pro_show_parentLst(18);
+----+----------------+-----------+-------+-------------+----------------------------+
| id | NAME           | parent_id | depth | path        | pathname                   |
+----+----------------+-----------+-------+-------------+----------------------------+
| 18 | --欄目簡介     |        17 |     0 | -1/14/17/18 | TV580/幫忙/欄目簡介/       |
| 17 |   --幫忙       |        14 |     1 | -1/14/17    | TV580/幫忙/                |
| 14 |     --TV580    |        -1 |     2 | -1/14       | TV580/                     |
+----+----------------+-----------+-------+-------------+----------------------------+
3 rows in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

mysql>

CALL pro_show_parentLst(18);

mysql> CALL pro_show_parentLst(18);

+----+----------------+-----------+-------+-------------+----------------------------+

+----+----------------+-----------+-------+-------------+----------------------------+

| 18 | --欄目簡介 | 17 | 0 | -1/14/17/18 | TV580/幫忙/欄目簡介/ |

| 17 | --幫忙 | 14 | 1 | -1/14/17 | TV580/幫忙/ |

| 14 | --TV580 | -1 | 2 | -1/14 | TV580/ |

+----+----------------+-----------+-------+-------------+----------------------------+

3 rows in set (0.02 sec)

Query OK, 0 rows affected (0.02 sec)

mysql>

參考網址：
http://jan.kneschke.de/projects/mysql/sp/sp_tree.sql
http://blog.csdn.net/ylqmf/article/details/5172901

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