mysql - 具有完整树父级的 MySql 邻接列表

Question

我想在本教程之后在 MySql 中使用邻接列表模型： Managing Hierarchical Data in MySQL with query：

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 + 叶节点 ID (category_id) 的附加列？

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

1 .ID = ELECTRONICS 的 ID

2 .ID = 电视的 ID

3 .ID = TUBE 的 ID

我想要显示完整的列表树和独立的父母，以及他们的 ID...