public function removeKey($key)
    {
        if (is_array($key))
        {
            $keyString = "(" . implode(',', $key) . ")";
        }
        else
        {
            $keyString = "`" . $key . "`";
        }
        
        $query = 
            "ALTER TABLE " . 
            '`' . $this->m_name . '` ' . 
            "DROP INDEX " . $keyString;
        
        $result = $this->m_mysqliConn->query($query);
        return $result;
    }