Multipart/formatted MySQL query problem

After much trial and error I finally figured out a solution using mysqli. I consider it a acceptable solution since the query will only be run on plugin updates.

$mysqli = new mysqli();
$mysqli->connect(DB_HOST, DB_USER, DB_PASSWORD, DB_NAME);

$sql = "
    DROP TRIGGER IF EXISTS {$wpdb->get_blog_prefix($site->id)}post_queue_insert;
    CREATE TRIGGER {$wpdb->get_blog_prefix($site->id)}post_queue_insert BEFORE INSERT ON {$wpdb->get_blog_prefix($site->id)}posts
    FOR EACH ROW BEGIN
        INSERT INTO {$wpdb->base_prefix}post_queue (action_id, action_type, action_status, action_event, action_timestamp, sync_complete, SITE_ID) VALUES (NEW.ID, NEW.post_type, NEW.post_status, 'insert', UNIX_TIMESTAMP(now()), 0, {$site->id});
    END;
";

$mysqli->multi_query($sql);
$mysqli->close();