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实现树形的遍历（关于多级菜单栏以及多级上下部门的查询问题）(四)
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3.3，显示TV580下面的所有子节点
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 | --帮忙 | 14 | 1 | -1/14/17 | TV580/帮忙/ | | 18 | --栏目简介 | 17 | 2 | -1/14/17/18 | TV580/帮忙/栏目简介/ | +----+--------------------+-----------+-------+-------------+----------------------------+ 3 rows in set (0.02 sec) Query OK, 0 rows affected (0.02 sec) mysql>
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3.4，“帮忙”节点有一个子节点，显示出来：
CALL pro_show_childLst(17); mysql> CALL pro_show_childLst(17); +----+------------------+-----------+-------+-------------+----------------------------+ | id | NAME | parent_id | depth | path | pathname | +----+------------------+-----------+-------+-------------+----------------------------+ | 17 | --帮忙 | 14 | 0 | -1/14/17 | TV580/帮忙/ | | 18 | --栏目简介 | 17 | 1 | -1/14/17/18 | TV580/帮忙/栏目简介/ | +----+------------------+-----------+-------+-------------+----------------------------+ 2 rows in set (0.03 sec) Query OK, 0 rows affected (0.03 sec) mysql>
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3.5，“栏目简介”没有子节点，所以只显示最终节点：
mysql> CALL pro_show_childLst(18); +----+----------------+-----------+-------+-------------+----------------------------+ | id | NAME | parent_id | depth | path | pathname | +----+----------------+-----------+-------+-------------+----------------------------+ | 18 | --栏目简介 | 17 | 0 | -1/14/17/18 | TV580/帮忙/栏目简介/ | +----+----------------+-----------+-------+-------------+----------------------------+ 1 row in set (0.36 sec) Query OK, 0 rows affected (0.36 sec) mysql>
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3.6，显示根节点的父节点 ?
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>
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3.7，显示“首页”的父节点
CALL pro_show_parentLst(13); mysql> CALL pro_show_parentLst(13); +----+----------+-----------+-------+-------+----------+ | id | NAME | parent_id | depth | path | pathname | +----+----------+-----------+-------+-------+----------+ | 13 | --首页 | -1 | 0 | -1/13 | 首页/ | +----+----------+-----------+-------+-------+----------+ 1 row in set (0.02 sec) Query OK, 0 rows affected (0.02 sec) mysql>
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3.8，显示“TV580”的父节点，parent_id为-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)
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3.9，显示“帮忙”节点的父节点
mysql>
CALL pro_show_parentLst(17);
mysql> CALL pro_show_parentLst(17);
+----+-----------+-----------+-------+----------+---------------+
| id | NAME | parent_id | depth | path | pathname |
+----+-----------+-----------+-------+----------+---------------+
| 17 | --帮忙 | 14 | 0 | -1/14/17 | TV580/帮忙/ |
| 14 | --TV580 | -1 | 1 | -1/14 | TV580/ |
+----+-----------+-----------+-----