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From:Graham Reitz Date:November 23 2007 11:37pm
Subject:Re: Application hangs at Result call to at()...
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I forgot to add:

Mac OS X 10.5.1 (Leopard)
Xcode 3.0

On Nov 23, 2007, at 5:34 PM, Graham Reitz wrote:

> I have an application that does the following:
>
> unsigned int some_db::client_id_query(std::string &client_username,
>                           std::string &client_password,
>                           std::string &error_msg)
> {
> 	try
> 	{
>        Query client_id_query = m_connection.query();
>        client_id_query << "select client_id from clients where  
> client_user_name ="
>            << quote_only << client_username << " and
> client_password  
> ="
>            << quote_only << client_password;
>
>        cout << "Query created\n";
>
>        Result client_id_result = client_id_query.store();
>
>        cout << "Result received\n";
>
>        Row client_id_row;
>        if (client_id_row = client_id_result.at(0))  // It hangs  
> here, and eventually hard crashes.
>        {
>            return client_id_row.at(0);
>        }
>    }
>    catch (exception &e)
>    {
>        error_msg = e.what();
>    }
>    catch (...)
>    {
>        error_msg = "Unknown exception";
>    }
>    return 0;
> }
>
> The output is:
> Connected to the some database (this is from the main function)
> Query created
> Result received (hangs here for about 20-30 seconds and than hard  
> crashes)
>
> I can perform a manual query in the database using the mysql client  
> and it returns a result without issue.
> What would cause it to hang for about 20-30 seconds at the  
> client_id_result.at(0) call?
> If there is something fundamentally wrong with this code I would be  
> grateful for any advice.
>
> Thanks,
> graham
>

Thread
Application hangs at Result call to at()...Graham Reitz24 Nov
  • Re: Application hangs at Result call to at()...Graham Reitz24 Nov
    • Re: Application hangs at Result call to at()...Graham Reitz24 Nov
      • Re: Application hangs at Result call to at()...Graham Reitz24 Nov
      • Re: Application hangs at Result call to at()...Warren Young26 Nov
  • RE: Application hangs at Result call to at()...Jim Wallace26 Nov
    • Re: Application hangs at Result call to at()...Graham Reitz26 Nov