WordPress（Gutenberg）块编辑器从嵌入的代理端点请求数据，该端点使用Transients API. 似乎清除所有oembed缓存并不能同时清除oembed临时缓存。

以下数据库查询无法从Posteta表中清除oembed缓存：

global $wpdb;
$meta_key_1 = "|_oembed|_%%";
$meta_key_2 = "|_oembed|_time|_%%";
$wpdb->query(
    $query = $wpdb->prepare( 
        "DELETE FROM `".$wpdb->postmeta."`
            WHERE `meta_key` LIKE %s ESCAPE \'|\'
            OR `meta_key` LIKE %s ESCAPE \'|\'",
        $meta_key_1,
        $meta_key_2
    )
);

$option_name_1 = "|_transient|_oembed|_%%";
$option_name_2 = "|_transient|_timeout|_oembed|_%%";
$wpdb->query(
    $query = $wpdb->prepare( 
        "DELETE FROM `".$wpdb->options."`
            WHERE `option_name` LIKE %s ESCAPE \'|\'
            OR `option_name` LIKE %s ESCAPE \'|\'",
        $option_name_1,
        $option_name_2
    )
);