问运行时检查失败#2 -变量'ex‘周围的堆栈已损坏。

EN

DBConnPtr CDBConnector::GetConnectionInstance()
{
    if (m_pConn)
       return m_pConn;

    if (m_loginInfo.hostName.IsEmpty() || 
        m_loginInfo.portNumber == 0 || 
        m_loginInfo.userName.IsEmpty())
      return m_pConn;

    CString hostInfo(_T(""));
    hostInfo.Format("tcp://%s:%d", m_loginInfo.hostName, m_loginInfo.portNumber);
    sql::SQLString host = hostInfo;
    sql::SQLString user = m_loginInfo.userName;
    sql::SQLString pwd = m_loginInfo.userPwd;

    try
    {
        sql::Driver* pDriver = get_driver_instance();
        m_pConn = (DBConnPtr)pDriver->connect(host, user, pwd);
    }
    catch (sql::SQLException ex)
    {
    }
    //mysql_thread_end();

    return m_pConn;
}