具有完整树父项的MySql邻接列表

Question

我希望在本教程之后使用MySql中的邻接列表模型： 带有查询的Managing Hierarchical Data in MySQL：

SELECT t1.name AS lev1, t2.name as lev2, t3.name as lev3, t4.name as lev4
FROM category AS t1
LEFT JOIN category AS t2 ON t2.parent = t1.category_id
LEFT JOIN category AS t3 ON t3.parent = t2.category_id
LEFT JOIN category AS t4 ON t4.parent = t3.category_id
WHERE t1.name = 'ELECTRONICS';

我的问题是，即如果查询返回：

 | ELECTRONICS | TELEVISIONS | TUBE | NULL |
 | ELECTRONICS | TELEVISIONS | LCD | NULL |
 | ELECTRONICS | TELEVISIONS | PLASMA | NULL |

如何修改查询以获取此结果数据+ Leaf节点ID（category_id）的附加列？

ID | ELECTRONICS | NULL |NULL | NULL |
ID | ELECTRONICS | TELEVISIONS |NULL | NULL |
ID | ELECTRONICS | TELEVISIONS |TUBE | NULL |

  

1 .ID =电子的身份

     

2 .ID = TELEVISIONS的ID

     

3 .ID = TUBE的ID

我想要显示完整列表树和独立父母，以及他们的ID ...