您实际上并没有移动任何内容，只是更改了一个名为post_type 对于每个帖子，您不必担心自定义字段或其他任何问题。

只需获取需要更改的帖子的帖子id，然后对其进行更改，如果不想为此创建自定义sql查询，您甚至可以通过WordPress进行此操作：

//first get the post_ids as an array
/*the SQL way 
    global $wpdb;
    $querystr = "
        SELECT * FROM $wpdb->posts
        LEFT JOIN $wpdb->term_relationships ON($wpdb->posts.ID = $wpdb->term_relationships.object_id)
        LEFT JOIN $wpdb->term_taxonomy ON($wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id)
        LEFT JOIN $wpdb->terms ON($wpdb->terms.term_id = $wpdb->term_taxonomy.term_id)
        WHERE $wpdb->terms.name = \'CAGETORY_NAME\'
        AND $wpdb->term_taxonomy.taxonomy = \'category\'
        AND $wpdb->posts.post_status = \'publish\'
        AND $wpdb->posts.post_type = \'post\'
    ";

    $post_ids = $wpdb->get_results($querystr); 
*/
//
//
//
/* the WordPress Way */
        $post_ids = get_posts(array(\'post_per_page\' => -1, \'cat\' => category_id));
    //then update each post
        foreach($post_ids as $p){
            $po = array();
            $po = get_post($p->ID,\'ARRAY_A\');
            $po[\'post_type\'] = "NEW_TYPE_NAME";
            wp_update_post($po);
        }