public function fulltextIndexExists($tableName)
    {
        // Special case for no full text index support
        if (!$this->database->fullTextEnabled()) {
            return null;
        }

        return (bool) $this->preparedQuery("
			SELECT 1 FROM sys.fulltext_indexes i
			JOIN sys.objects o ON i.object_id = o.object_id
			WHERE o.name = ?",
            array($tableName)
        )->value();
    }