Fetch subdomain names

def get_subdomains_count(self, accepted=True, cur=None):
        """
        Fetch subdomain names
        """
        if accepted:
            accepted_filter = 'WHERE accepted=1'
        else:
            accepted_filter = ''

        get_cmd = "SELECT COUNT(DISTINCT fully_qualified_subdomain) as count FROM {} {};".format(
            self.subdomain_table, accepted_filter)

        cursor = cur
        if cursor is None:
            cursor = self.conn.cursor()

        db_query_execute(cursor, get_cmd, ())

        try:
            rowdata = cursor.fetchone()
            return rowdata['count']
        except Exception as e:
            if BLOCKSTACK_DEBUG:
                log.exception(e)
            return 0