我创建了一个插件add geographic data to Wordpress. 根据this answer 分类法数据不应存储在数据库中，但它似乎是存储在：

mysql> select * from wp_term_taxonomy where taxonomy=\'geoareas\' limit 10;
+------------------+---------+----------+-------------+--------+-------+
| term_taxonomy_id | term_id | taxonomy | description | parent | count |
+------------------+---------+----------+-------------+--------+-------+
|              953 |     699 | geoareas |             |      0 |     2 |
|              954 |     700 | geoareas |             |    699 |     0 |
|              955 |     701 | geoareas |             |    700 |     0 |
|              956 |     702 | geoareas |             |    700 |     0 |
|              957 |     703 | geoareas |             |    700 |     0 |
|              958 |     704 | geoareas |             |    700 |     0 |
|              959 |     705 | geoareas |             |    700 |     0 |
|              960 |     706 | geoareas |             |    700 |     0 |
|              961 |     707 | geoareas |             |    700 |     0 |
|              962 |     708 | geoareas |             |    700 |     0 |
+------------------+---------+----------+-------------+--------+-------+
10 rows in set (0.00 sec)

Why is that data stored in the database? 删除上的数据的正确方法是什么register_deactivation_hook 自从wp_delete_term() 似乎只是从数据库中删除了术语，而不是整个分类法。我是否需要手动删除数据库中的所有术语Post和术语CustomPostType关联，然后删除对分类法本身的所有引用？或者是否有我应该使用的内部WP功能？显而易见的wp_delete_taxonomy() 不存在！

EDIT: 在我看来taxonomy data 存储在数据库中的存储在wp_term_taxonomy, wp_terms, 和wp_term_relationships 表格。这三个查询是否足以清除taxonomy data 从上的数据库register_deactivation_hook()?

DELETE tr FROM wp_term_taxonomy tt INNER JOIN wp_term_relationships tr ON tt.term_taxonomy_id=tr.term_taxonomy_id WHERE taxonomy=\'geoareas\';

DELETE tt FROM wp_term_taxonomy tt INNER JOIN wp_terms t ON tt.term_id=t.term_id WHERE taxonomy=\'geoareas\';

DELETE FROM wp_term_taxonomy WHERE taxonomy=\'geoareas\';