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Disconnect data not coming in from remote database, but coming in from local database

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  • Disconnect data not coming in from remote database, but coming in from local database

    I have an application which ultimately needs to use a remote MySQL database. I made a local copy of the database and successfully created the component. From the local component, the data is coming in correctly, and the prefetch is working well. It is not working from the remote database. I duplicated the component that is working from the local MySQL and changed the connection string to point to the remote MySQL. The prefetch is not working at all.
    Viewing Firefox Page source, I can see the local component is working and the remote component is not working.
    I have made a short video for your viewing pleasure:

    http://75.126.30.235/remote_problem.mp4

    What am I missing?
    Thanks,
    Jay
    Jay Talbott
    Lexington, KY


  • #2
    Re: Disconnect data not coming in from remote database, but coming in from local database

    There are so many settings and options which you may, or may not, be using that it's tough to tell what's going on. You've not mentioned what Alpha Version/Build you're working on.

    Are your Lists set up as Parent/Child? You mention 'prefetch'... but does that mean you're using the 'Pre-load data' property in the Child List? Not a lot to go on here.

    If you post or PM me your "remote" component with connection string info I'll have a look.

    Comment


    • #3
      Re: Disconnect data not coming in from remote database, but coming in from local database

      Thanks, David. I'll email you the components. I am working on AA 4.2 build 3670.
      Jay
      Jay Talbott
      Lexington, KY

      Comment


      • #4
        Re: Disconnect data not coming in from remote database, but coming in from local database

        Resolved....
        Selwyn graciously looked at the issue and pointed out that the MySQL database is an older one (4.1) that does not support statements with sub-selects, which is what Alpha uses to make the pre-loading of data work.
        There is a work around which is to add ,junk='NOSUBSELECT' to the end of the connection string, so the connection string looks like this:
        {A5API=MySQL,Server='xxx.xxx.xxx.xxx',Port='3306',UserName='root',Password='MyDefConLevelFourPassword',Database='Northwind',junk='NOSUBSELECT'}

        By adding this to the connection string, Alpha "brute forces" the sub-select in the database.
        Thanks again for all your help, Max, David, and especially Selwyn.
        Jay
        Jay Talbott
        Lexington, KY

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